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