drivers/input/mouse/alps.c

   1 /*
   2  * ALPS touchpad PS/2 mouse driver
   3  *
   4  * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
   5  * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
   6  * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
   7  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
   8  *
   9  * ALPS detection, tap switching and status querying info is taken from
  10  * tpconfig utility (by C. Scott Ananian and Bruce Kall).
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License version 2 as published by
  14  * the Free Software Foundation.
  15  */
  16
  17 #include <linux/input.h>
  18 #include <linux/serio.h>
  19 #include <linux/libps2.h>
  20
  21 #include "psmouse.h"
  22 #include "alps.h"
  23
  24 #undef DEBUG
  25 #ifdef DEBUG
  26 #define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
  27 #else
  28 #define dbg(format, arg...) do {} while (0)
  29 #endif
  30
  31 #define ALPS_DUALPOINT  0x01
  32 #define ALPS_WHEEL      0x02
  33 #define ALPS_FW_BK_1    0x04
  34 #define ALPS_4BTN       0x08
  35 #define ALPS_OLDPROTO   0x10
  36 #define ALPS_PASS       0x20
  37 #define ALPS_FW_BK_2    0x40
  38
  39 static const struct alps_model_info alps_model_data[] = {
  40         { { 0x32, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
  41         { { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO },              /* UMAX-530T */
  42         { { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  43         { { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  44         { { 0x60, 0x03, 0xc8 }, 0xf8, 0xf8, 0 },                          /* HP ze1115 */
  45         { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  46         { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  47         { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, ALPS_FW_BK_2 },               /* Fujitsu Siemens S6010 */
  48         { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL },                 /* Toshiba Satellite S2400-103 */
  49         { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK_1 },               /* NEC Versa L320 */
  50         { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
  51         { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D800 */
  52         { { 0x73, 0x00, 0x0a }, 0xf8, 0xf8, ALPS_DUALPOINT },             /* ThinkPad R61 8918-5QG */
  53         { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  54         { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_FW_BK_2 },               /* Ahtec Laptop */
  55         { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
  56         { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
  57         { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
  58         { { 0x62, 0x02, 0x14 }, 0xcf, 0xcf, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude E6500 */
  59         { { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FW_BK_1 },               /* Dell Vostro 1400 */
  60 };
  61
  62 /*
  63  * XXX - this entry is suspicious. First byte has zero lower nibble,
  64  * which is what a normal mouse would report. Also, the value 0x0e
  65  * isn't valid per PS/2 spec.
  66  */
  67
  68 /*
  69  * ALPS abolute Mode - new format
  70  *
  71  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  72  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
  73  * byte 2:  0   x10  x9   x8   x7    ?  fin  ges
  74  * byte 3:  0   y9   y8   y7    1    M    R    L
  75  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  76  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  77  *
  78  * ?'s can have different meanings on different models,
  79  * such as wheel rotation, extra buttons, stick buttons
  80  * on a dualpoint, etc.
  81  */
  82
  83 static void alps_process_packet(struct psmouse *psmouse)
  84 {
  85         struct alps_data *priv = psmouse->private;
  86         unsigned char *packet = psmouse->packet;
  87         struct input_dev *dev = psmouse->dev;
  88         struct input_dev *dev2 = priv->dev2;
  89         int x, y, z, ges, fin, left, right, middle;
  90         int back = 0, forward = 0;
  91
  92         if ((packet[0] & 0xc8) == 0x08) {   /* 3-byte PS/2 packet */
  93                 input_report_key(dev2, BTN_LEFT,   packet[0] & 1);
  94                 input_report_key(dev2, BTN_RIGHT,  packet[0] & 2);
  95                 input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
  96                 input_report_rel(dev2, REL_X,
  97                         packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
  98                 input_report_rel(dev2, REL_Y,
  99                         packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
 100                 input_sync(dev2);
 101                 return;
 102         }
 103
 104         if (priv->i->flags & ALPS_OLDPROTO) {
 105                 left = packet[2] & 0x10;
 106                 right = packet[2] & 0x08;
 107                 middle = 0;
 108                 x = packet[1] | ((packet[0] & 0x07) << 7);
 109                 y = packet[4] | ((packet[3] & 0x07) << 7);
 110                 z = packet[5];
 111         } else {
 112                 left = packet[3] & 1;
 113                 right = packet[3] & 2;
 114                 middle = packet[3] & 4;
 115                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 116                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 117                 z = packet[5];
 118         }
 119
 120         if (priv->i->flags & ALPS_FW_BK_1) {
 121                 back = packet[0] & 0x10;
 122                 forward = packet[2] & 4;
 123         }
 124
 125         if (priv->i->flags & ALPS_FW_BK_2) {
 126                 back = packet[3] & 4;
 127                 forward = packet[2] & 4;
 128                 if ((middle = forward && back))
 129                         forward = back = 0;
 130         }
 131
 132         ges = packet[2] & 1;
 133         fin = packet[2] & 2;
 134
 135         if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
 136                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 137                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 138
 139                 input_report_key(dev2, BTN_LEFT, left);
 140                 input_report_key(dev2, BTN_RIGHT, right);
 141                 input_report_key(dev2, BTN_MIDDLE, middle);
 142
 143                 input_sync(dev);
 144                 input_sync(dev2);
 145                 return;
 146         }
 147
 148         input_report_key(dev, BTN_LEFT, left);
 149         input_report_key(dev, BTN_RIGHT, right);
 150         input_report_key(dev, BTN_MIDDLE, middle);
 151
 152         /* Convert hardware tap to a reasonable Z value */
 153         if (ges && !fin) z = 40;
 154
 155         /*
 156          * A "tap and drag" operation is reported by the hardware as a transition
 157          * from (!fin && ges) to (fin && ges). This should be translated to the
 158          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 159          */
 160         if (ges && fin && !priv->prev_fin) {
 161                 input_report_abs(dev, ABS_X, x);
 162                 input_report_abs(dev, ABS_Y, y);
 163                 input_report_abs(dev, ABS_PRESSURE, 0);
 164                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 165                 input_sync(dev);
 166         }
 167         priv->prev_fin = fin;
 168
 169         if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
 170         if (z < 25) input_report_key(dev, BTN_TOUCH, 0);
 171
 172         if (z > 0) {
 173                 input_report_abs(dev, ABS_X, x);
 174                 input_report_abs(dev, ABS_Y, y);
 175         }
 176
 177         input_report_abs(dev, ABS_PRESSURE, z);
 178         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 179
 180         if (priv->i->flags & ALPS_WHEEL)
 181                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 182
 183         if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 184                 input_report_key(dev, BTN_FORWARD, forward);
 185                 input_report_key(dev, BTN_BACK, back);
 186         }
 187
 188         input_sync(dev);
 189 }
 190
 191 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 192 {
 193         struct alps_data *priv = psmouse->private;
 194
 195         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 196                 if (psmouse->pktcnt == 3) {
 197                         alps_process_packet(psmouse);
 198                         return PSMOUSE_FULL_PACKET;
 199                 }
 200                 return PSMOUSE_GOOD_DATA;
 201         }
 202
 203         if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
 204                 return PSMOUSE_BAD_DATA;
 205
 206         /* Bytes 2 - 6 should have 0 in the highest bit */
 207         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 208             (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
 209                 return PSMOUSE_BAD_DATA;
 210
 211         if (psmouse->pktcnt == 6) {
 212                 alps_process_packet(psmouse);
 213                 return PSMOUSE_FULL_PACKET;
 214         }
 215
 216         return PSMOUSE_GOOD_DATA;
 217 }
 218
 219 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 220 {
 221         struct ps2dev *ps2dev = &psmouse->ps2dev;
 222         static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 223         unsigned char param[4];
 224         int i;
 225
 226         /*
 227          * First try "E6 report".
 228          * ALPS should return 0,0,10 or 0,0,100
 229          */
 230         param[0] = 0;
 231         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 232             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 233             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 234             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 235                 return NULL;
 236
 237         param[0] = param[1] = param[2] = 0xff;
 238         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 239                 return NULL;
 240
 241         dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 242
 243         if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 244                 return NULL;
 245
 246         /*
 247          * Now try "E7 report". Allowed responses are in
 248          * alps_model_data[].signature
 249          */
 250         param[0] = 0;
 251         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 252             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 253             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 254             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 255                 return NULL;
 256
 257         param[0] = param[1] = param[2] = 0xff;
 258         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 259                 return NULL;
 260
 261         dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 262
 263         if (version) {
 264                 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
 265                         /* empty */;
 266                 *version = (param[0] << 8) | (param[1] << 4) | i;
 267         }
 268
 269         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 270                 if (!memcmp(param, alps_model_data[i].signature,
 271                             sizeof(alps_model_data[i].signature)))
 272                         return alps_model_data + i;
 273
 274         return NULL;
 275 }
 276
 277 /*
 278  * For DualPoint devices select the device that should respond to
 279  * subsequent commands. It looks like glidepad is behind stickpointer,
 280  * I'd thought it would be other way around...
 281  */
 282 static int alps_passthrough_mode(struct psmouse *psmouse, bool enable)
 283 {
 284         struct ps2dev *ps2dev = &psmouse->ps2dev;
 285         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
 286
 287         if (ps2_command(ps2dev, NULL, cmd) ||
 288             ps2_command(ps2dev, NULL, cmd) ||
 289             ps2_command(ps2dev, NULL, cmd) ||
 290             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 291                 return -1;
 292
 293         /* we may get 3 more bytes, just ignore them */
 294         ps2_drain(ps2dev, 3, 100);
 295
 296         return 0;
 297 }
 298
 299 static int alps_absolute_mode(struct psmouse *psmouse)
 300 {
 301         struct ps2dev *ps2dev = &psmouse->ps2dev;
 302
 303         /* Try ALPS magic knock - 4 disable before enable */
 304         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 305             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 306             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 307             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 308             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 309                 return -1;
 310
 311         /*
 312          * Switch mouse to poll (remote) mode so motion data will not
 313          * get in our way
 314          */
 315         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 316 }
 317
 318 static int alps_get_status(struct psmouse *psmouse, char *param)
 319 {
 320         struct ps2dev *ps2dev = &psmouse->ps2dev;
 321
 322         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
 323         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 324             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 325             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 326             ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 327                 return -1;
 328
 329         dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 330
 331         return 0;
 332 }
 333
 334 /*
 335  * Turn touchpad tapping on or off. The sequences are:
 336  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 337  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 338  * My guess that 0xE9 (GetInfo) is here as a sync point.
 339  * For models that also have stickpointer (DualPoints) its tapping
 340  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 341  * we don't fiddle with it.
 342  */
 343 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 344 {
 345         struct ps2dev *ps2dev = &psmouse->ps2dev;
 346         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 347         unsigned char tap_arg = enable ? 0x0A : 0x00;
 348         unsigned char param[4];
 349
 350         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 351             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 352             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 353             ps2_command(ps2dev, &tap_arg, cmd))
 354                 return -1;
 355
 356         if (alps_get_status(psmouse, param))
 357                 return -1;
 358
 359         return 0;
 360 }
 361
 362 /*
 363  * alps_poll() - poll the touchpad for current motion packet.
 364  * Used in resync.
 365  */
 366 static int alps_poll(struct psmouse *psmouse)
 367 {
 368         struct alps_data *priv = psmouse->private;
 369         unsigned char buf[6];
 370         bool poll_failed;
 371
 372         if (priv->i->flags & ALPS_PASS)
 373                 alps_passthrough_mode(psmouse, true);
 374
 375         poll_failed = ps2_command(&psmouse->ps2dev, buf,
 376                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
 377
 378         if (priv->i->flags & ALPS_PASS)
 379                 alps_passthrough_mode(psmouse, false);
 380
 381         if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
 382                 return -1;
 383
 384         if ((psmouse->badbyte & 0xc8) == 0x08) {
 385 /*
 386  * Poll the track stick ...
 387  */
 388                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
 389                         return -1;
 390         }
 391
 392         memcpy(psmouse->packet, buf, sizeof(buf));
 393         return 0;
 394 }
 395
 396 static int alps_hw_init(struct psmouse *psmouse, int *version)
 397 {
 398         struct alps_data *priv = psmouse->private;
 399
 400         priv->i = alps_get_model(psmouse, version);
 401         if (!priv->i)
 402                 return -1;
 403
 404         if ((priv->i->flags & ALPS_PASS) &&
 405             alps_passthrough_mode(psmouse, true)) {
 406                 return -1;
 407         }
 408
 409         if (alps_tap_mode(psmouse, true)) {
 410                 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 411                 return -1;
 412         }
 413
 414         if (alps_absolute_mode(psmouse)) {
 415                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 416                 return -1;
 417         }
 418
 419         if ((priv->i->flags & ALPS_PASS) &&
 420             alps_passthrough_mode(psmouse, false)) {
 421                 return -1;
 422         }
 423
 424         /* ALPS needs stream mode, otherwise it won't report any data */
 425         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
 426                 printk(KERN_ERR "alps.c: Failed to enable stream mode\n");
 427                 return -1;
 428         }
 429
 430         return 0;
 431 }
 432
 433 static int alps_reconnect(struct psmouse *psmouse)
 434 {
 435         psmouse_reset(psmouse);
 436
 437         if (alps_hw_init(psmouse, NULL))
 438                 return -1;
 439
 440         return 0;
 441 }
 442
 443 static void alps_disconnect(struct psmouse *psmouse)
 444 {
 445         struct alps_data *priv = psmouse->private;
 446
 447         psmouse_reset(psmouse);
 448         input_unregister_device(priv->dev2);
 449         kfree(priv);
 450 }
 451
 452 int alps_init(struct psmouse *psmouse)
 453 {
 454         struct alps_data *priv;
 455         struct input_dev *dev1 = psmouse->dev, *dev2;
 456         int version;
 457
 458         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
 459         dev2 = input_allocate_device();
 460         if (!priv || !dev2)
 461                 goto init_fail;
 462
 463         priv->dev2 = dev2;
 464         psmouse->private = priv;
 465
 466         if (alps_hw_init(psmouse, &version))
 467                 goto init_fail;
 468
 469         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
 470         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
 471         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
 472         dev1->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
 473                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 474
 475         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
 476         input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
 477         input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
 478         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
 479
 480         if (priv->i->flags & ALPS_WHEEL) {
 481                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
 482                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
 483         }
 484
 485         if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 486                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
 487                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
 488         }
 489
 490         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
 491         dev2->phys = priv->phys;
 492         dev2->name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 493         dev2->id.bustype = BUS_I8042;
 494         dev2->id.vendor  = 0x0002;
 495         dev2->id.product = PSMOUSE_ALPS;
 496         dev2->id.version = 0x0000;
 497         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
 498
 499         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 500         dev2->relbit[BIT_WORD(REL_X)] |= BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 501         dev2->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
 502                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 503
 504         if (input_register_device(priv->dev2))
 505                 goto init_fail;
 506
 507         psmouse->protocol_handler = alps_process_byte;
 508         psmouse->poll = alps_poll;
 509         psmouse->disconnect = alps_disconnect;
 510         psmouse->reconnect = alps_reconnect;
 511         psmouse->pktsize = 6;
 512
 513         /* We are having trouble resyncing ALPS touchpads so disable it for now */
 514         psmouse->resync_time = 0;
 515
 516         return 0;
 517
 518 init_fail:
 519         psmouse_reset(psmouse);
 520         input_free_device(dev2);
 521         kfree(priv);
 522         psmouse->private = NULL;
 523         return -1;
 524 }
 525
 526 int alps_detect(struct psmouse *psmouse, bool set_properties)
 527 {
 528         int version;
 529         const struct alps_model_info *model;
 530
 531         model = alps_get_model(psmouse, &version);
 532         if (!model)
 533                 return -1;
 534
 535         if (set_properties) {
 536                 psmouse->vendor = "ALPS";
 537                 psmouse->name = model->flags & ALPS_DUALPOINT ?
 538                                 "DualPoint TouchPad" : "GlidePoint";
 539                 psmouse->model = version;
 540         }
 541         return 0;
 542 }
 543