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