drivers/input/mouse/synaptics.c

   1 /*
   2  * Synaptics TouchPad PS/2 mouse driver
   3  *
   4  *   2003 Dmitry Torokhov <dtor@mail.ru>
   5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   6  *     for explaining various Synaptics quirks.
   7  *
   8  *   2003 Peter Osterlund <petero2@telia.com>
   9  *     Ported to 2.5 input device infrastructure.
  10  *
  11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  12  *     start merging tpconfig and gpm code to a xfree-input module
  13  *     adding some changes and extensions (ex. 3rd and 4th button)
  14  *
  15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  17  *     code for the special synaptics commands (from the tpconfig-source)
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License version 2 as published by
  21  * the Free Software Foundation.
  22  *
  23  * Trademarks are the property of their respective owners.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/dmi.h>
  28 #include <linux/input.h>
  29 #include <linux/serio.h>
  30 #include <linux/libps2.h>
  31 #include <linux/slab.h>
  32 #include "psmouse.h"
  33 #include "synaptics.h"
  34
  35 /*
  36  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  37  * section 2.3.2, which says that they should be valid regardless of the
  38  * actual size of the sensor.
  39  * Note that newer firmware allows querying device for maximum useable
  40  * coordinates.
  41  */
  42 #define XMIN_NOMINAL 1472
  43 #define XMAX_NOMINAL 5472
  44 #define YMIN_NOMINAL 1408
  45 #define YMAX_NOMINAL 4448
  46
  47
  48 /*****************************************************************************
  49  *      Stuff we need even when we do not want native Synaptics support
  50  ****************************************************************************/
  51
  52 /*
  53  * Set the synaptics touchpad mode byte by special commands
  54  */
  55 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  56 {
  57         unsigned char param[1];
  58
  59         if (psmouse_sliced_command(psmouse, mode))
  60                 return -1;
  61         param[0] = SYN_PS_SET_MODE2;
  62         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  63                 return -1;
  64         return 0;
  65 }
  66
  67 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  68 {
  69         struct ps2dev *ps2dev = &psmouse->ps2dev;
  70         unsigned char param[4];
  71
  72         param[0] = 0;
  73
  74         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  75         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  76         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  77         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  78         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
  79
  80         if (param[1] != 0x47)
  81                 return -ENODEV;
  82
  83         if (set_properties) {
  84                 psmouse->vendor = "Synaptics";
  85                 psmouse->name = "TouchPad";
  86         }
  87
  88         return 0;
  89 }
  90
  91 void synaptics_reset(struct psmouse *psmouse)
  92 {
  93         /* reset touchpad back to relative mode, gestures enabled */
  94         synaptics_mode_cmd(psmouse, 0);
  95 }
  96
  97 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
  98
  99 /*****************************************************************************
 100  *      Synaptics communications functions
 101  ****************************************************************************/
 102
 103 /*
 104  * Send a command to the synpatics touchpad by special commands
 105  */
 106 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 107 {
 108         if (psmouse_sliced_command(psmouse, c))
 109                 return -1;
 110         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 111                 return -1;
 112         return 0;
 113 }
 114
 115 /*
 116  * Read the model-id bytes from the touchpad
 117  * see also SYN_MODEL_* macros
 118  */
 119 static int synaptics_model_id(struct psmouse *psmouse)
 120 {
 121         struct synaptics_data *priv = psmouse->private;
 122         unsigned char mi[3];
 123
 124         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 125                 return -1;
 126         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 127         return 0;
 128 }
 129
 130 /*
 131  * Read the capability-bits from the touchpad
 132  * see also the SYN_CAP_* macros
 133  */
 134 static int synaptics_capability(struct psmouse *psmouse)
 135 {
 136         struct synaptics_data *priv = psmouse->private;
 137         unsigned char cap[3];
 138
 139         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 140                 return -1;
 141         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 142         priv->ext_cap = priv->ext_cap_0c = 0;
 143
 144         /*
 145          * Older firmwares had submodel ID fixed to 0x47
 146          */
 147         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 148             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 149                 return -1;
 150         }
 151
 152         /*
 153          * Unless capExtended is set the rest of the flags should be ignored
 154          */
 155         if (!SYN_CAP_EXTENDED(priv->capabilities))
 156                 priv->capabilities = 0;
 157
 158         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 159                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 160                         printk(KERN_ERR "Synaptics claims to have extended capabilities,"
 161                                " but I'm not able to read them.\n");
 162                 } else {
 163                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 164
 165                         /*
 166                          * if nExtBtn is greater than 8 it should be considered
 167                          * invalid and treated as 0
 168                          */
 169                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 170                                 priv->ext_cap &= 0xff0fff;
 171                 }
 172         }
 173
 174         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 175                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 176                         printk(KERN_ERR "Synaptics claims to have extended capability 0x0c,"
 177                                " but I'm not able to read it.\n");
 178                 } else {
 179                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 180                 }
 181         }
 182
 183         return 0;
 184 }
 185
 186 /*
 187  * Identify Touchpad
 188  * See also the SYN_ID_* macros
 189  */
 190 static int synaptics_identify(struct psmouse *psmouse)
 191 {
 192         struct synaptics_data *priv = psmouse->private;
 193         unsigned char id[3];
 194
 195         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 196                 return -1;
 197         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 198         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 199                 return 0;
 200         return -1;
 201 }
 202
 203 /*
 204  * Read touchpad resolution and maximum reported coordinates
 205  * Resolution is left zero if touchpad does not support the query
 206  */
 207 static int synaptics_resolution(struct psmouse *psmouse)
 208 {
 209         struct synaptics_data *priv = psmouse->private;
 210         unsigned char res[3];
 211         unsigned char max[3];
 212
 213         if (SYN_ID_MAJOR(priv->identity) < 4)
 214                 return 0;
 215
 216         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, res) == 0) {
 217                 if (res[0] != 0 && (res[1] & 0x80) && res[2] != 0) {
 218                         priv->x_res = res[0]; /* x resolution in units/mm */
 219                         priv->y_res = res[2]; /* y resolution in units/mm */
 220                 }
 221         }
 222
 223         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 224             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 225                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_DIMENSIONS, max)) {
 226                         printk(KERN_ERR "Synaptics claims to have dimensions query,"
 227                                " but I'm not able to read it.\n");
 228                 } else {
 229                         priv->x_max = (max[0] << 5) | ((max[1] & 0x0f) << 1);
 230                         priv->y_max = (max[2] << 5) | ((max[1] & 0xf0) >> 3);
 231                 }
 232         }
 233
 234         return 0;
 235 }
 236
 237 static int synaptics_query_hardware(struct psmouse *psmouse)
 238 {
 239         if (synaptics_identify(psmouse))
 240                 return -1;
 241         if (synaptics_model_id(psmouse))
 242                 return -1;
 243         if (synaptics_capability(psmouse))
 244                 return -1;
 245         if (synaptics_resolution(psmouse))
 246                 return -1;
 247
 248         return 0;
 249 }
 250
 251 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
 252 {
 253         struct synaptics_data *priv = psmouse->private;
 254
 255         priv->mode = SYN_BIT_ABSOLUTE_MODE;
 256         if (SYN_ID_MAJOR(priv->identity) >= 4)
 257                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 258         if (SYN_CAP_EXTENDED(priv->capabilities))
 259                 priv->mode |= SYN_BIT_W_MODE;
 260
 261         if (synaptics_mode_cmd(psmouse, priv->mode))
 262                 return -1;
 263
 264         return 0;
 265 }
 266
 267 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 268 {
 269         struct synaptics_data *priv = psmouse->private;
 270
 271         if (rate >= 80) {
 272                 priv->mode |= SYN_BIT_HIGH_RATE;
 273                 psmouse->rate = 80;
 274         } else {
 275                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 276                 psmouse->rate = 40;
 277         }
 278
 279         synaptics_mode_cmd(psmouse, priv->mode);
 280 }
 281
 282 /*****************************************************************************
 283  *      Synaptics pass-through PS/2 port support
 284  ****************************************************************************/
 285 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 286 {
 287         struct psmouse *parent = serio_get_drvdata(serio->parent);
 288         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 289
 290         if (psmouse_sliced_command(parent, c))
 291                 return -1;
 292         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 293                 return -1;
 294         return 0;
 295 }
 296
 297 static int synaptics_pt_start(struct serio *serio)
 298 {
 299         struct psmouse *parent = serio_get_drvdata(serio->parent);
 300         struct synaptics_data *priv = parent->private;
 301
 302         serio_pause_rx(parent->ps2dev.serio);
 303         priv->pt_port = serio;
 304         serio_continue_rx(parent->ps2dev.serio);
 305
 306         return 0;
 307 }
 308
 309 static void synaptics_pt_stop(struct serio *serio)
 310 {
 311         struct psmouse *parent = serio_get_drvdata(serio->parent);
 312         struct synaptics_data *priv = parent->private;
 313
 314         serio_pause_rx(parent->ps2dev.serio);
 315         priv->pt_port = NULL;
 316         serio_continue_rx(parent->ps2dev.serio);
 317 }
 318
 319 static int synaptics_is_pt_packet(unsigned char *buf)
 320 {
 321         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 322 }
 323
 324 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 325 {
 326         struct psmouse *child = serio_get_drvdata(ptport);
 327
 328         if (child && child->state == PSMOUSE_ACTIVATED) {
 329                 serio_interrupt(ptport, packet[1], 0);
 330                 serio_interrupt(ptport, packet[4], 0);
 331                 serio_interrupt(ptport, packet[5], 0);
 332                 if (child->pktsize == 4)
 333                         serio_interrupt(ptport, packet[2], 0);
 334         } else
 335                 serio_interrupt(ptport, packet[1], 0);
 336 }
 337
 338 static void synaptics_pt_activate(struct psmouse *psmouse)
 339 {
 340         struct synaptics_data *priv = psmouse->private;
 341         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 342
 343         /* adjust the touchpad to child's choice of protocol */
 344         if (child) {
 345                 if (child->pktsize == 4)
 346                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 347                 else
 348                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 349
 350                 if (synaptics_mode_cmd(psmouse, priv->mode))
 351                         printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
 352         }
 353 }
 354
 355 static void synaptics_pt_create(struct psmouse *psmouse)
 356 {
 357         struct serio *serio;
 358
 359         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 360         if (!serio) {
 361                 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
 362                 return;
 363         }
 364
 365         serio->id.type = SERIO_PS_PSTHRU;
 366         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 367         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 368         serio->write = synaptics_pt_write;
 369         serio->start = synaptics_pt_start;
 370         serio->stop = synaptics_pt_stop;
 371         serio->parent = psmouse->ps2dev.serio;
 372
 373         psmouse->pt_activate = synaptics_pt_activate;
 374
 375         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
 376         serio_register_port(serio);
 377 }
 378
 379 /*****************************************************************************
 380  *      Functions to interpret the absolute mode packets
 381  ****************************************************************************/
 382
 383 static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
 384 {
 385         memset(hw, 0, sizeof(struct synaptics_hw_state));
 386
 387         if (SYN_MODEL_NEWABS(priv->model_id)) {
 388                 hw->x = (((buf[3] & 0x10) << 8) |
 389                          ((buf[1] & 0x0f) << 8) |
 390                          buf[4]);
 391                 hw->y = (((buf[3] & 0x20) << 7) |
 392                          ((buf[1] & 0xf0) << 4) |
 393                          buf[5]);
 394
 395                 hw->z = buf[2];
 396                 hw->w = (((buf[0] & 0x30) >> 2) |
 397                          ((buf[0] & 0x04) >> 1) |
 398                          ((buf[3] & 0x04) >> 2));
 399
 400                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 401                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 402
 403                 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 404                         /*
 405                          * Clickpad's button is transmitted as middle button,
 406                          * however, since it is primary button, we will report
 407                          * it as BTN_LEFT.
 408                          */
 409                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 410
 411                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 412                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 413                         if (hw->w == 2)
 414                                 hw->scroll = (signed char)(buf[1]);
 415                 }
 416
 417                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 418                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 419                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 420                 }
 421
 422                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 423                     ((buf[0] ^ buf[3]) & 0x02)) {
 424                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 425                         default:
 426                                 /*
 427                                  * if nExtBtn is greater than 8 it should be
 428                                  * considered invalid and treated as 0
 429                                  */
 430                                 break;
 431                         case 8:
 432                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 433                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 434                         case 6:
 435                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 436                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 437                         case 4:
 438                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 439                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 440                         case 2:
 441                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 442                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 443                         }
 444                 }
 445         } else {
 446                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 447                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 448
 449                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 450                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 451
 452                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 453                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 454         }
 455 }
 456
 457 /*
 458  *  called for each full received packet from the touchpad
 459  */
 460 static void synaptics_process_packet(struct psmouse *psmouse)
 461 {
 462         struct input_dev *dev = psmouse->dev;
 463         struct synaptics_data *priv = psmouse->private;
 464         struct synaptics_hw_state hw;
 465         int num_fingers;
 466         int finger_width;
 467         int i;
 468
 469         synaptics_parse_hw_state(psmouse->packet, priv, &hw);
 470
 471         if (hw.scroll) {
 472                 priv->scroll += hw.scroll;
 473
 474                 while (priv->scroll >= 4) {
 475                         input_report_key(dev, BTN_BACK, !hw.down);
 476                         input_sync(dev);
 477                         input_report_key(dev, BTN_BACK, hw.down);
 478                         input_sync(dev);
 479                         priv->scroll -= 4;
 480                 }
 481                 while (priv->scroll <= -4) {
 482                         input_report_key(dev, BTN_FORWARD, !hw.up);
 483                         input_sync(dev);
 484                         input_report_key(dev, BTN_FORWARD, hw.up);
 485                         input_sync(dev);
 486                         priv->scroll += 4;
 487                 }
 488                 return;
 489         }
 490
 491         if (hw.z > 0) {
 492                 num_fingers = 1;
 493                 finger_width = 5;
 494                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 495                         switch (hw.w) {
 496                         case 0 ... 1:
 497                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 498                                         num_fingers = hw.w + 2;
 499                                 break;
 500                         case 2:
 501                                 if (SYN_MODEL_PEN(priv->model_id))
 502                                         ;   /* Nothing, treat a pen as a single finger */
 503                                 break;
 504                         case 4 ... 15:
 505                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 506                                         finger_width = hw.w;
 507                                 break;
 508                         }
 509                 }
 510         } else {
 511                 num_fingers = 0;
 512                 finger_width = 0;
 513         }
 514
 515         /* Post events
 516          * BTN_TOUCH has to be first as mousedev relies on it when doing
 517          * absolute -> relative conversion
 518          */
 519         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 520         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 521
 522         if (hw.z > 0) {
 523                 input_report_abs(dev, ABS_X, hw.x);
 524                 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
 525         }
 526         input_report_abs(dev, ABS_PRESSURE, hw.z);
 527
 528         if (SYN_CAP_PALMDETECT(priv->capabilities))
 529                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 530
 531         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 532         input_report_key(dev, BTN_LEFT, hw.left);
 533         input_report_key(dev, BTN_RIGHT, hw.right);
 534
 535         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 536                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 537                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 538         }
 539
 540         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 541                 input_report_key(dev, BTN_MIDDLE, hw.middle);
 542
 543         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 544                 input_report_key(dev, BTN_FORWARD, hw.up);
 545                 input_report_key(dev, BTN_BACK, hw.down);
 546         }
 547
 548         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 549                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
 550
 551         input_sync(dev);
 552 }
 553
 554 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
 555 {
 556         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 557         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 558         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 559         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 560         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 561
 562         if (idx < 0 || idx > 4)
 563                 return 0;
 564
 565         switch (pkt_type) {
 566
 567         case SYN_NEWABS:
 568         case SYN_NEWABS_RELAXED:
 569                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 570
 571         case SYN_NEWABS_STRICT:
 572                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 573
 574         case SYN_OLDABS:
 575                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 576
 577         default:
 578                 printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
 579                 return 0;
 580         }
 581 }
 582
 583 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 584 {
 585         int i;
 586
 587         for (i = 0; i < 5; i++)
 588                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
 589                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
 590                         return SYN_NEWABS_RELAXED;
 591                 }
 592
 593         return SYN_NEWABS_STRICT;
 594 }
 595
 596 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 597 {
 598         struct synaptics_data *priv = psmouse->private;
 599
 600         if (psmouse->pktcnt >= 6) { /* Full packet received */
 601                 if (unlikely(priv->pkt_type == SYN_NEWABS))
 602                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 603
 604                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
 605                     synaptics_is_pt_packet(psmouse->packet)) {
 606                         if (priv->pt_port)
 607                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
 608                 } else
 609                         synaptics_process_packet(psmouse);
 610
 611                 return PSMOUSE_FULL_PACKET;
 612         }
 613
 614         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
 615                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 616 }
 617
 618 /*****************************************************************************
 619  *      Driver initialization/cleanup functions
 620  ****************************************************************************/
 621 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 622 {
 623         int i;
 624
 625         __set_bit(EV_ABS, dev->evbit);
 626         input_set_abs_params(dev, ABS_X,
 627                              XMIN_NOMINAL, priv->x_max ?: XMAX_NOMINAL, 0, 0);
 628         input_set_abs_params(dev, ABS_Y,
 629                              YMIN_NOMINAL, priv->y_max ?: YMAX_NOMINAL, 0, 0);
 630         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
 631
 632         if (SYN_CAP_PALMDETECT(priv->capabilities))
 633                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
 634
 635         __set_bit(EV_KEY, dev->evbit);
 636         __set_bit(BTN_TOUCH, dev->keybit);
 637         __set_bit(BTN_TOOL_FINGER, dev->keybit);
 638         __set_bit(BTN_LEFT, dev->keybit);
 639         __set_bit(BTN_RIGHT, dev->keybit);
 640
 641         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 642                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 643                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
 644         }
 645
 646         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 647                 __set_bit(BTN_MIDDLE, dev->keybit);
 648
 649         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
 650             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 651                 __set_bit(BTN_FORWARD, dev->keybit);
 652                 __set_bit(BTN_BACK, dev->keybit);
 653         }
 654
 655         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 656                 __set_bit(BTN_0 + i, dev->keybit);
 657
 658         __clear_bit(EV_REL, dev->evbit);
 659         __clear_bit(REL_X, dev->relbit);
 660         __clear_bit(REL_Y, dev->relbit);
 661
 662         input_abs_set_res(dev, ABS_X, priv->x_res);
 663         input_abs_set_res(dev, ABS_Y, priv->y_res);
 664
 665         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 666                 /* Clickpads report only left button */
 667                 __clear_bit(BTN_RIGHT, dev->keybit);
 668                 __clear_bit(BTN_MIDDLE, dev->keybit);
 669         }
 670 }
 671
 672 static void synaptics_disconnect(struct psmouse *psmouse)
 673 {
 674         synaptics_reset(psmouse);
 675         kfree(psmouse->private);
 676         psmouse->private = NULL;
 677 }
 678
 679 static int synaptics_reconnect(struct psmouse *psmouse)
 680 {
 681         struct synaptics_data *priv = psmouse->private;
 682         struct synaptics_data old_priv = *priv;
 683
 684         psmouse_reset(psmouse);
 685
 686         if (synaptics_detect(psmouse, 0))
 687                 return -1;
 688
 689         if (synaptics_query_hardware(psmouse)) {
 690                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 691                 return -1;
 692         }
 693
 694         if (old_priv.identity != priv->identity ||
 695             old_priv.model_id != priv->model_id ||
 696             old_priv.capabilities != priv->capabilities ||
 697             old_priv.ext_cap != priv->ext_cap)
 698                 return -1;
 699
 700         if (synaptics_set_absolute_mode(psmouse)) {
 701                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 702                 return -1;
 703         }
 704
 705         return 0;
 706 }
 707
 708 static bool impaired_toshiba_kbc;
 709
 710 static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
 711 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
 712         {
 713                 /* Toshiba Satellite */
 714                 .matches = {
 715                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 716                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
 717                 },
 718         },
 719         {
 720                 /* Toshiba Dynabook */
 721                 .matches = {
 722                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 723                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
 724                 },
 725         },
 726         {
 727                 /* Toshiba Portege M300 */
 728                 .matches = {
 729                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 730                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
 731                 },
 732
 733         },
 734         {
 735                 /* Toshiba Portege M300 */
 736                 .matches = {
 737                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 738                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
 739                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
 740                 },
 741
 742         },
 743         { }
 744 #endif
 745 };
 746
 747 void __init synaptics_module_init(void)
 748 {
 749         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
 750 }
 751
 752 int synaptics_init(struct psmouse *psmouse)
 753 {
 754         struct synaptics_data *priv;
 755
 756         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
 757         if (!priv)
 758                 return -ENOMEM;
 759
 760         psmouse_reset(psmouse);
 761
 762         if (synaptics_query_hardware(psmouse)) {
 763                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 764                 goto init_fail;
 765         }
 766
 767         if (synaptics_set_absolute_mode(psmouse)) {
 768                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 769                 goto init_fail;
 770         }
 771
 772         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
 773
 774         printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
 775                 SYN_ID_MODEL(priv->identity),
 776                 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
 777                 priv->model_id, priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
 778
 779         set_input_params(psmouse->dev, priv);
 780
 781         /*
 782          * Encode touchpad model so that it can be used to set
 783          * input device->id.version and be visible to userspace.
 784          * Because version is __u16 we have to drop something.
 785          * Hardware info bits seem to be good candidates as they
 786          * are documented to be for Synaptics corp. internal use.
 787          */
 788         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
 789                           (priv->model_id & 0x000000ff);
 790
 791         psmouse->protocol_handler = synaptics_process_byte;
 792         psmouse->set_rate = synaptics_set_rate;
 793         psmouse->disconnect = synaptics_disconnect;
 794         psmouse->reconnect = synaptics_reconnect;
 795         psmouse->cleanup = synaptics_reset;
 796         psmouse->pktsize = 6;
 797         /* Synaptics can usually stay in sync without extra help */
 798         psmouse->resync_time = 0;
 799
 800         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
 801                 synaptics_pt_create(psmouse);
 802
 803         /*
 804          * Toshiba's KBC seems to have trouble handling data from
 805          * Synaptics as full rate, switch to lower rate which is roughly
 806          * thye same as rate of standard PS/2 mouse.
 807          */
 808         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
 809                 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
 810                         dmi_get_system_info(DMI_PRODUCT_NAME));
 811                 psmouse->rate = 40;
 812         }
 813
 814         return 0;
 815
 816  init_fail:
 817         kfree(priv);
 818         return -1;
 819 }
 820
 821 bool synaptics_supported(void)
 822 {
 823         return true;
 824 }
 825
 826 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
 827
 828 void __init synaptics_module_init(void)
 829 {
 830 }
 831
 832 int synaptics_init(struct psmouse *psmouse)
 833 {
 834         return -ENOSYS;
 835 }
 836
 837 bool synaptics_supported(void)
 838 {
 839         return false;
 840 }
 841
 842 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
 843