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  * Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net>
   9  *
  10  * ALPS detection, tap switching and status querying info is taken from
  11  * tpconfig utility (by C. Scott Ananian and Bruce Kall).
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU General Public License version 2 as published by
  15  * the Free Software Foundation.
  16  */
  17
  18 #include <linux/input.h>
  19 #include <linux/serio.h>
  20 #include <linux/libps2.h>
  21
  22 #include "psmouse.h"
  23 #include "alps.h"
  24
  25 #undef DEBUG
  26 #ifdef DEBUG
  27 #define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
  28 #else
  29 #define dbg(format, arg...) do {} while (0)
  30 #endif
  31
  32 #define ALPS_OLDPROTO           0x01    /* old style input */
  33 #define ALPS_DUALPOINT          0x02    /* touchpad has trackstick */
  34 #define ALPS_PASS               0x04    /* device has a pass-through port */
  35
  36 #define ALPS_WHEEL              0x08    /* hardware wheel present */
  37 #define ALPS_FW_BK_1            0x10    /* front & back buttons present */
  38 #define ALPS_FW_BK_2            0x20    /* front & back buttons present */
  39 #define ALPS_FOUR_BUTTONS       0x40    /* 4 direction button present */
  40 #define ALPS_PS2_INTERLEAVED    0x80    /* 3-byte PS/2 packet interleaved with
  41                                            6-byte ALPS packet */
  42
  43 static const struct alps_model_info alps_model_data[] = {
  44         { { 0x32, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
  45         { { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO },              /* UMAX-530T */
  46         { { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  47         { { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  48         { { 0x60, 0x03, 0xc8 }, 0xf8, 0xf8, 0 },                          /* HP ze1115 */
  49         { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  50         { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  51         { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, ALPS_FW_BK_2 },               /* Fujitsu Siemens S6010 */
  52         { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL },                 /* Toshiba Satellite S2400-103 */
  53         { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK_1 },               /* NEC Versa L320 */
  54         { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
  55         { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D800 */
  56         { { 0x73, 0x00, 0x0a }, 0xf8, 0xf8, ALPS_DUALPOINT },             /* ThinkPad R61 8918-5QG */
  57         { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  58         { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_FW_BK_2 },               /* Ahtec Laptop */
  59         { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
  60         { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
  61         { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
  62         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
  63         { { 0x62, 0x02, 0x14 }, 0xcf, 0xcf,
  64                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
  65         { { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FOUR_BUTTONS },          /* Dell Vostro 1400 */
  66         { { 0x52, 0x01, 0x14 }, 0xff, 0xff,
  67                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },      /* Toshiba Tecra A11-11L */
  68 };
  69
  70 /*
  71  * XXX - this entry is suspicious. First byte has zero lower nibble,
  72  * which is what a normal mouse would report. Also, the value 0x0e
  73  * isn't valid per PS/2 spec.
  74  */
  75
  76 /*
  77  * PS/2 packet format
  78  *
  79  * byte 0:  0    0 YSGN XSGN    1    M    R    L
  80  * byte 1: X7   X6   X5   X4   X3   X2   X1   X0
  81  * byte 2: Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
  82  *
  83  * Note that the device never signals overflow condition.
  84  *
  85  * ALPS absolute Mode - new format
  86  *
  87  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  88  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
  89  * byte 2:  0  x10   x9   x8   x7    ?  fin  ges
  90  * byte 3:  0   y9   y8   y7    1    M    R    L
  91  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  92  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  93  *
  94  * Dualpoint device -- interleaved packet format
  95  *
  96  * byte 0:    1    1    0    0    1    1    1    1
  97  * byte 1:    0   x6   x5   x4   x3   x2   x1   x0
  98  * byte 2:    0  x10   x9   x8   x7    0  fin  ges
  99  * byte 3:    0    0 YSGN XSGN    1    1    1    1
 100  * byte 4:   X7   X6   X5   X4   X3   X2   X1   X0
 101  * byte 5:   Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
 102  * byte 6:    0   y9   y8   y7    1    m    r    l
 103  * byte 7:    0   y6   y5   y4   y3   y2   y1   y0
 104  * byte 8:    0   z6   z5   z4   z3   z2   z1   z0
 105  *
 106  * CAPITALS = stick, miniscules = touchpad
 107  *
 108  * ?'s can have different meanings on different models,
 109  * such as wheel rotation, extra buttons, stick buttons
 110  * on a dualpoint, etc.
 111  */
 112
 113 static bool alps_is_valid_first_byte(const struct alps_model_info *model,
 114                                      unsigned char data)
 115 {
 116         return (data & model->mask0) == model->byte0;
 117 }
 118
 119 static void alps_report_buttons(struct psmouse *psmouse,
 120                                 struct input_dev *dev1, struct input_dev *dev2,
 121                                 int left, int right, int middle)
 122 {
 123         struct input_dev *dev;
 124
 125         /*
 126          * If shared button has already been reported on the
 127          * other device (dev2) then this event should be also
 128          * sent through that device.
 129          */
 130         dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
 131         input_report_key(dev, BTN_LEFT, left);
 132
 133         dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
 134         input_report_key(dev, BTN_RIGHT, right);
 135
 136         dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
 137         input_report_key(dev, BTN_MIDDLE, middle);
 138
 139         /*
 140          * Sync the _other_ device now, we'll do the first
 141          * device later once we report the rest of the events.
 142          */
 143         input_sync(dev2);
 144 }
 145
 146 static void alps_process_packet(struct psmouse *psmouse)
 147 {
 148         struct alps_data *priv = psmouse->private;
 149         const struct alps_model_info *model = priv->i;
 150         unsigned char *packet = psmouse->packet;
 151         struct input_dev *dev = psmouse->dev;
 152         struct input_dev *dev2 = priv->dev2;
 153         int x, y, z, ges, fin, left, right, middle;
 154         int back = 0, forward = 0;
 155
 156         if (model->flags & ALPS_OLDPROTO) {
 157                 left = packet[2] & 0x10;
 158                 right = packet[2] & 0x08;
 159                 middle = 0;
 160                 x = packet[1] | ((packet[0] & 0x07) << 7);
 161                 y = packet[4] | ((packet[3] & 0x07) << 7);
 162                 z = packet[5];
 163         } else {
 164                 left = packet[3] & 1;
 165                 right = packet[3] & 2;
 166                 middle = packet[3] & 4;
 167                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 168                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 169                 z = packet[5];
 170         }
 171
 172         if (model->flags & ALPS_FW_BK_1) {
 173                 back = packet[0] & 0x10;
 174                 forward = packet[2] & 4;
 175         }
 176
 177         if (model->flags & ALPS_FW_BK_2) {
 178                 back = packet[3] & 4;
 179                 forward = packet[2] & 4;
 180                 if ((middle = forward && back))
 181                         forward = back = 0;
 182         }
 183
 184         ges = packet[2] & 1;
 185         fin = packet[2] & 2;
 186
 187         if ((model->flags & ALPS_DUALPOINT) && z == 127) {
 188                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 189                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 190
 191                 alps_report_buttons(psmouse, dev2, dev, left, right, middle);
 192
 193                 input_sync(dev2);
 194                 return;
 195         }
 196
 197         alps_report_buttons(psmouse, dev, dev2, left, right, middle);
 198
 199         /* Convert hardware tap to a reasonable Z value */
 200         if (ges && !fin)
 201                 z = 40;
 202
 203         /*
 204          * A "tap and drag" operation is reported by the hardware as a transition
 205          * from (!fin && ges) to (fin && ges). This should be translated to the
 206          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 207          */
 208         if (ges && fin && !priv->prev_fin) {
 209                 input_report_abs(dev, ABS_X, x);
 210                 input_report_abs(dev, ABS_Y, y);
 211                 input_report_abs(dev, ABS_PRESSURE, 0);
 212                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 213                 input_sync(dev);
 214         }
 215         priv->prev_fin = fin;
 216
 217         if (z > 30)
 218                 input_report_key(dev, BTN_TOUCH, 1);
 219         if (z < 25)
 220                 input_report_key(dev, BTN_TOUCH, 0);
 221
 222         if (z > 0) {
 223                 input_report_abs(dev, ABS_X, x);
 224                 input_report_abs(dev, ABS_Y, y);
 225         }
 226
 227         input_report_abs(dev, ABS_PRESSURE, z);
 228         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 229
 230         if (model->flags & ALPS_WHEEL)
 231                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 232
 233         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 234                 input_report_key(dev, BTN_FORWARD, forward);
 235                 input_report_key(dev, BTN_BACK, back);
 236         }
 237
 238         if (model->flags & ALPS_FOUR_BUTTONS) {
 239                 input_report_key(dev, BTN_0, packet[2] & 4);
 240                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 241                 input_report_key(dev, BTN_2, packet[3] & 4);
 242                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 243         }
 244
 245         input_sync(dev);
 246 }
 247
 248 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 249                                         unsigned char packet[],
 250                                         bool report_buttons)
 251 {
 252         struct alps_data *priv = psmouse->private;
 253         struct input_dev *dev2 = priv->dev2;
 254
 255         if (report_buttons)
 256                 alps_report_buttons(psmouse, dev2, psmouse->dev,
 257                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
 258
 259         input_report_rel(dev2, REL_X,
 260                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
 261         input_report_rel(dev2, REL_Y,
 262                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
 263
 264         input_sync(dev2);
 265 }
 266
 267 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 268 {
 269         struct alps_data *priv = psmouse->private;
 270
 271         if (psmouse->pktcnt < 6)
 272                 return PSMOUSE_GOOD_DATA;
 273
 274         if (psmouse->pktcnt == 6) {
 275                 /*
 276                  * Start a timer to flush the packet if it ends up last
 277                  * 6-byte packet in the stream. Timer needs to fire
 278                  * psmouse core times out itself. 20 ms should be enough
 279                  * to decide if we are getting more data or not.
 280                  */
 281                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
 282                 return PSMOUSE_GOOD_DATA;
 283         }
 284
 285         del_timer(&priv->timer);
 286
 287         if (psmouse->packet[6] & 0x80) {
 288
 289                 /*
 290                  * Highest bit is set - that means we either had
 291                  * complete ALPS packet and this is start of the
 292                  * next packet or we got garbage.
 293                  */
 294
 295                 if (((psmouse->packet[3] |
 296                       psmouse->packet[4] |
 297                       psmouse->packet[5]) & 0x80) ||
 298                     (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
 299                         dbg("refusing packet %x %x %x %x "
 300                             "(suspected interleaved ps/2)\n",
 301                             psmouse->packet[3], psmouse->packet[4],
 302                             psmouse->packet[5], psmouse->packet[6]);
 303                         return PSMOUSE_BAD_DATA;
 304                 }
 305
 306                 alps_process_packet(psmouse);
 307
 308                 /* Continue with the next packet */
 309                 psmouse->packet[0] = psmouse->packet[6];
 310                 psmouse->pktcnt = 1;
 311
 312         } else {
 313
 314                 /*
 315                  * High bit is 0 - that means that we indeed got a PS/2
 316                  * packet in the middle of ALPS packet.
 317                  *
 318                  * There is also possibility that we got 6-byte ALPS
 319                  * packet followed  by 3-byte packet from trackpoint. We
 320                  * can not distinguish between these 2 scenarios but
 321                  * becase the latter is unlikely to happen in course of
 322                  * normal operation (user would need to press all
 323                  * buttons on the pad and start moving trackpoint
 324                  * without touching the pad surface) we assume former.
 325                  * Even if we are wrong the wost thing that would happen
 326                  * the cursor would jump but we should not get protocol
 327                  * desynchronization.
 328                  */
 329
 330                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
 331                                             false);
 332
 333                 /*
 334                  * Continue with the standard ALPS protocol handling,
 335                  * but make sure we won't process it as an interleaved
 336                  * packet again, which may happen if all buttons are
 337                  * pressed. To avoid this let's reset the 4th bit which
 338                  * is normally 1.
 339                  */
 340                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
 341                 psmouse->pktcnt = 4;
 342         }
 343
 344         return PSMOUSE_GOOD_DATA;
 345 }
 346
 347 static void alps_flush_packet(unsigned long data)
 348 {
 349         struct psmouse *psmouse = (struct psmouse *)data;
 350
 351         serio_pause_rx(psmouse->ps2dev.serio);
 352
 353         if (psmouse->pktcnt == 6) {
 354
 355                 /*
 356                  * We did not any more data in reasonable amount of time.
 357                  * Validate the last 3 bytes and process as a standard
 358                  * ALPS packet.
 359                  */
 360                 if ((psmouse->packet[3] |
 361                      psmouse->packet[4] |
 362                      psmouse->packet[5]) & 0x80) {
 363                         dbg("refusing packet %x %x %x "
 364                             "(suspected interleaved ps/2)\n",
 365                             psmouse->packet[3], psmouse->packet[4],
 366                             psmouse->packet[5]);
 367                 } else {
 368                         alps_process_packet(psmouse);
 369                 }
 370                 psmouse->pktcnt = 0;
 371         }
 372
 373         serio_continue_rx(psmouse->ps2dev.serio);
 374 }
 375
 376 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 377 {
 378         struct alps_data *priv = psmouse->private;
 379         const struct alps_model_info *model = priv->i;
 380
 381         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 382                 if (psmouse->pktcnt == 3) {
 383                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
 384                                                     true);
 385                         return PSMOUSE_FULL_PACKET;
 386                 }
 387                 return PSMOUSE_GOOD_DATA;
 388         }
 389
 390         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
 391
 392         if ((model->flags & ALPS_PS2_INTERLEAVED) &&
 393             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
 394                 return alps_handle_interleaved_ps2(psmouse);
 395         }
 396
 397         if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
 398                 dbg("refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
 399                     psmouse->packet[0], model->mask0, model->byte0);
 400                 return PSMOUSE_BAD_DATA;
 401         }
 402
 403         /* Bytes 2 - 6 should have 0 in the highest bit */
 404         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 405             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
 406                 dbg("refusing packet[%i] = %x\n",
 407                     psmouse->pktcnt - 1, psmouse->packet[psmouse->pktcnt - 1]);
 408                 return PSMOUSE_BAD_DATA;
 409         }
 410
 411         if (psmouse->pktcnt == 6) {
 412                 alps_process_packet(psmouse);
 413                 return PSMOUSE_FULL_PACKET;
 414         }
 415
 416         return PSMOUSE_GOOD_DATA;
 417 }
 418
 419 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 420 {
 421         struct ps2dev *ps2dev = &psmouse->ps2dev;
 422         static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 423         unsigned char param[4];
 424         int i;
 425
 426         /*
 427          * First try "E6 report".
 428          * ALPS should return 0,0,10 or 0,0,100
 429          */
 430         param[0] = 0;
 431         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 432             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 433             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 434             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 435                 return NULL;
 436
 437         param[0] = param[1] = param[2] = 0xff;
 438         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 439                 return NULL;
 440
 441         dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 442
 443         if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 444                 return NULL;
 445
 446         /*
 447          * Now try "E7 report". Allowed responses are in
 448          * alps_model_data[].signature
 449          */
 450         param[0] = 0;
 451         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 452             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 453             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 454             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 455                 return NULL;
 456
 457         param[0] = param[1] = param[2] = 0xff;
 458         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 459                 return NULL;
 460
 461         dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 462
 463         if (version) {
 464                 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
 465                         /* empty */;
 466                 *version = (param[0] << 8) | (param[1] << 4) | i;
 467         }
 468
 469         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 470                 if (!memcmp(param, alps_model_data[i].signature,
 471                             sizeof(alps_model_data[i].signature)))
 472                         return alps_model_data + i;
 473
 474         return NULL;
 475 }
 476
 477 /*
 478  * For DualPoint devices select the device that should respond to
 479  * subsequent commands. It looks like glidepad is behind stickpointer,
 480  * I'd thought it would be other way around...
 481  */
 482 static int alps_passthrough_mode(struct psmouse *psmouse, bool enable)
 483 {
 484         struct ps2dev *ps2dev = &psmouse->ps2dev;
 485         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
 486
 487         if (ps2_command(ps2dev, NULL, cmd) ||
 488             ps2_command(ps2dev, NULL, cmd) ||
 489             ps2_command(ps2dev, NULL, cmd) ||
 490             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 491                 return -1;
 492
 493         /* we may get 3 more bytes, just ignore them */
 494         ps2_drain(ps2dev, 3, 100);
 495
 496         return 0;
 497 }
 498
 499 static int alps_absolute_mode(struct psmouse *psmouse)
 500 {
 501         struct ps2dev *ps2dev = &psmouse->ps2dev;
 502
 503         /* Try ALPS magic knock - 4 disable before enable */
 504         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 505             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 506             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 507             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 508             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 509                 return -1;
 510
 511         /*
 512          * Switch mouse to poll (remote) mode so motion data will not
 513          * get in our way
 514          */
 515         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 516 }
 517
 518 static int alps_get_status(struct psmouse *psmouse, char *param)
 519 {
 520         struct ps2dev *ps2dev = &psmouse->ps2dev;
 521
 522         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
 523         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 524             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 525             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 526             ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 527                 return -1;
 528
 529         dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 530
 531         return 0;
 532 }
 533
 534 /*
 535  * Turn touchpad tapping on or off. The sequences are:
 536  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 537  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 538  * My guess that 0xE9 (GetInfo) is here as a sync point.
 539  * For models that also have stickpointer (DualPoints) its tapping
 540  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 541  * we don't fiddle with it.
 542  */
 543 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 544 {
 545         struct ps2dev *ps2dev = &psmouse->ps2dev;
 546         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 547         unsigned char tap_arg = enable ? 0x0A : 0x00;
 548         unsigned char param[4];
 549
 550         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 551             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 552             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 553             ps2_command(ps2dev, &tap_arg, cmd))
 554                 return -1;
 555
 556         if (alps_get_status(psmouse, param))
 557                 return -1;
 558
 559         return 0;
 560 }
 561
 562 /*
 563  * alps_poll() - poll the touchpad for current motion packet.
 564  * Used in resync.
 565  */
 566 static int alps_poll(struct psmouse *psmouse)
 567 {
 568         struct alps_data *priv = psmouse->private;
 569         unsigned char buf[6];
 570         bool poll_failed;
 571
 572         if (priv->i->flags & ALPS_PASS)
 573                 alps_passthrough_mode(psmouse, true);
 574
 575         poll_failed = ps2_command(&psmouse->ps2dev, buf,
 576                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
 577
 578         if (priv->i->flags & ALPS_PASS)
 579                 alps_passthrough_mode(psmouse, false);
 580
 581         if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
 582                 return -1;
 583
 584         if ((psmouse->badbyte & 0xc8) == 0x08) {
 585 /*
 586  * Poll the track stick ...
 587  */
 588                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
 589                         return -1;
 590         }
 591
 592         memcpy(psmouse->packet, buf, sizeof(buf));
 593         return 0;
 594 }
 595
 596 static int alps_hw_init(struct psmouse *psmouse)
 597 {
 598         struct alps_data *priv = psmouse->private;
 599         const struct alps_model_info *model = priv->i;
 600
 601         if ((model->flags & ALPS_PASS) &&
 602             alps_passthrough_mode(psmouse, true)) {
 603                 return -1;
 604         }
 605
 606         if (alps_tap_mode(psmouse, true)) {
 607                 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 608                 return -1;
 609         }
 610
 611         if (alps_absolute_mode(psmouse)) {
 612                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 613                 return -1;
 614         }
 615
 616         if ((model->flags & ALPS_PASS) &&
 617             alps_passthrough_mode(psmouse, false)) {
 618                 return -1;
 619         }
 620
 621         /* ALPS needs stream mode, otherwise it won't report any data */
 622         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
 623                 printk(KERN_ERR "alps.c: Failed to enable stream mode\n");
 624                 return -1;
 625         }
 626
 627         return 0;
 628 }
 629
 630 static int alps_reconnect(struct psmouse *psmouse)
 631 {
 632         const struct alps_model_info *model;
 633
 634         psmouse_reset(psmouse);
 635
 636         model = alps_get_model(psmouse, NULL);
 637         if (!model)
 638                 return -1;
 639
 640         return alps_hw_init(psmouse);
 641 }
 642
 643 static void alps_disconnect(struct psmouse *psmouse)
 644 {
 645         struct alps_data *priv = psmouse->private;
 646
 647         psmouse_reset(psmouse);
 648         del_timer_sync(&priv->timer);
 649         input_unregister_device(priv->dev2);
 650         kfree(priv);
 651 }
 652
 653 int alps_init(struct psmouse *psmouse)
 654 {
 655         struct alps_data *priv;
 656         const struct alps_model_info *model;
 657         struct input_dev *dev1 = psmouse->dev, *dev2;
 658         int version;
 659
 660         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
 661         dev2 = input_allocate_device();
 662         if (!priv || !dev2)
 663                 goto init_fail;
 664
 665         priv->dev2 = dev2;
 666         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
 667
 668         psmouse->private = priv;
 669
 670         model = alps_get_model(psmouse, &version);
 671         if (!model)
 672                 goto init_fail;
 673
 674         priv->i = model;
 675
 676         if (alps_hw_init(psmouse))
 677                 goto init_fail;
 678
 679         /*
 680          * Undo part of setup done for us by psmouse core since touchpad
 681          * is not a relative device.
 682          */
 683         __clear_bit(EV_REL, dev1->evbit);
 684         __clear_bit(REL_X, dev1->relbit);
 685         __clear_bit(REL_Y, dev1->relbit);
 686
 687         /*
 688          * Now set up our capabilities.
 689          */
 690         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
 691         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
 692         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
 693         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
 694                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
 695
 696         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
 697         input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
 698         input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
 699         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
 700
 701         if (model->flags & ALPS_WHEEL) {
 702                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
 703                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
 704         }
 705
 706         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 707                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
 708                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
 709         }
 710
 711         if (model->flags & ALPS_FOUR_BUTTONS) {
 712                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
 713                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
 714                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
 715                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
 716         } else {
 717                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
 718         }
 719
 720         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
 721         dev2->phys = priv->phys;
 722         dev2->name = (model->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 723         dev2->id.bustype = BUS_I8042;
 724         dev2->id.vendor  = 0x0002;
 725         dev2->id.product = PSMOUSE_ALPS;
 726         dev2->id.version = 0x0000;
 727         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
 728
 729         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 730         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 731         dev2->keybit[BIT_WORD(BTN_LEFT)] =
 732                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 733
 734         if (input_register_device(priv->dev2))
 735                 goto init_fail;
 736
 737         psmouse->protocol_handler = alps_process_byte;
 738         psmouse->poll = alps_poll;
 739         psmouse->disconnect = alps_disconnect;
 740         psmouse->reconnect = alps_reconnect;
 741         psmouse->pktsize = 6;
 742
 743         /* We are having trouble resyncing ALPS touchpads so disable it for now */
 744         psmouse->resync_time = 0;
 745
 746         return 0;
 747
 748 init_fail:
 749         psmouse_reset(psmouse);
 750         input_free_device(dev2);
 751         kfree(priv);
 752         psmouse->private = NULL;
 753         return -1;
 754 }
 755
 756 int alps_detect(struct psmouse *psmouse, bool set_properties)
 757 {
 758         int version;
 759         const struct alps_model_info *model;
 760
 761         model = alps_get_model(psmouse, &version);
 762         if (!model)
 763                 return -1;
 764
 765         if (set_properties) {
 766                 psmouse->vendor = "ALPS";
 767                 psmouse->name = model->flags & ALPS_DUALPOINT ?
 768                                 "DualPoint TouchPad" : "GlidePoint";
 769                 psmouse->model = version;
 770         }
 771         return 0;
 772 }
 773