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 alps_data *priv = psmouse->private;
 124         const struct alps_model_info *model = priv->i;
 125
 126         if (model->flags & ALPS_PS2_INTERLEAVED) {
 127                 struct input_dev *dev;
 128
 129                 /*
 130                  * If shared button has already been reported on the
 131                  * other device (dev2) then this event should be also
 132                  * sent through that device.
 133                  */
 134                 dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
 135                 input_report_key(dev, BTN_LEFT, left);
 136
 137                 dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
 138                 input_report_key(dev, BTN_RIGHT, right);
 139
 140                 dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
 141                 input_report_key(dev, BTN_MIDDLE, middle);
 142
 143                 /*
 144                  * Sync the _other_ device now, we'll do the first
 145                  * device later once we report the rest of the events.
 146                  */
 147                 input_sync(dev2);
 148         } else {
 149                 /*
 150                  * For devices with non-interleaved packets we know what
 151                  * device buttons belong to so we can simply report them.
 152                  */
 153                 input_report_key(dev1, BTN_LEFT, left);
 154                 input_report_key(dev1, BTN_RIGHT, right);
 155                 input_report_key(dev1, BTN_MIDDLE, middle);
 156         }
 157 }
 158
 159 static void alps_process_packet(struct psmouse *psmouse)
 160 {
 161         struct alps_data *priv = psmouse->private;
 162         const struct alps_model_info *model = priv->i;
 163         unsigned char *packet = psmouse->packet;
 164         struct input_dev *dev = psmouse->dev;
 165         struct input_dev *dev2 = priv->dev2;
 166         int x, y, z, ges, fin, left, right, middle;
 167         int back = 0, forward = 0;
 168
 169         if (model->flags & ALPS_OLDPROTO) {
 170                 left = packet[2] & 0x10;
 171                 right = packet[2] & 0x08;
 172                 middle = 0;
 173                 x = packet[1] | ((packet[0] & 0x07) << 7);
 174                 y = packet[4] | ((packet[3] & 0x07) << 7);
 175                 z = packet[5];
 176         } else {
 177                 left = packet[3] & 1;
 178                 right = packet[3] & 2;
 179                 middle = packet[3] & 4;
 180                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 181                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 182                 z = packet[5];
 183         }
 184
 185         if (model->flags & ALPS_FW_BK_1) {
 186                 back = packet[0] & 0x10;
 187                 forward = packet[2] & 4;
 188         }
 189
 190         if (model->flags & ALPS_FW_BK_2) {
 191                 back = packet[3] & 4;
 192                 forward = packet[2] & 4;
 193                 if ((middle = forward && back))
 194                         forward = back = 0;
 195         }
 196
 197         ges = packet[2] & 1;
 198         fin = packet[2] & 2;
 199
 200         if ((model->flags & ALPS_DUALPOINT) && z == 127) {
 201                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 202                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 203
 204                 alps_report_buttons(psmouse, dev2, dev, left, right, middle);
 205
 206                 input_sync(dev2);
 207                 return;
 208         }
 209
 210         alps_report_buttons(psmouse, dev, dev2, left, right, middle);
 211
 212         /* Convert hardware tap to a reasonable Z value */
 213         if (ges && !fin)
 214                 z = 40;
 215
 216         /*
 217          * A "tap and drag" operation is reported by the hardware as a transition
 218          * from (!fin && ges) to (fin && ges). This should be translated to the
 219          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 220          */
 221         if (ges && fin && !priv->prev_fin) {
 222                 input_report_abs(dev, ABS_X, x);
 223                 input_report_abs(dev, ABS_Y, y);
 224                 input_report_abs(dev, ABS_PRESSURE, 0);
 225                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 226                 input_sync(dev);
 227         }
 228         priv->prev_fin = fin;
 229
 230         if (z > 30)
 231                 input_report_key(dev, BTN_TOUCH, 1);
 232         if (z < 25)
 233                 input_report_key(dev, BTN_TOUCH, 0);
 234
 235         if (z > 0) {
 236                 input_report_abs(dev, ABS_X, x);
 237                 input_report_abs(dev, ABS_Y, y);
 238         }
 239
 240         input_report_abs(dev, ABS_PRESSURE, z);
 241         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 242
 243         if (model->flags & ALPS_WHEEL)
 244                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 245
 246         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 247                 input_report_key(dev, BTN_FORWARD, forward);
 248                 input_report_key(dev, BTN_BACK, back);
 249         }
 250
 251         if (model->flags & ALPS_FOUR_BUTTONS) {
 252                 input_report_key(dev, BTN_0, packet[2] & 4);
 253                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 254                 input_report_key(dev, BTN_2, packet[3] & 4);
 255                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 256         }
 257
 258         input_sync(dev);
 259 }
 260
 261 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 262                                         unsigned char packet[],
 263                                         bool report_buttons)
 264 {
 265         struct alps_data *priv = psmouse->private;
 266         struct input_dev *dev2 = priv->dev2;
 267
 268         if (report_buttons)
 269                 alps_report_buttons(psmouse, dev2, psmouse->dev,
 270                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
 271
 272         input_report_rel(dev2, REL_X,
 273                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
 274         input_report_rel(dev2, REL_Y,
 275                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
 276
 277         input_sync(dev2);
 278 }
 279
 280 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 281 {
 282         struct alps_data *priv = psmouse->private;
 283
 284         if (psmouse->pktcnt < 6)
 285                 return PSMOUSE_GOOD_DATA;
 286
 287         if (psmouse->pktcnt == 6) {
 288                 /*
 289                  * Start a timer to flush the packet if it ends up last
 290                  * 6-byte packet in the stream. Timer needs to fire
 291                  * psmouse core times out itself. 20 ms should be enough
 292                  * to decide if we are getting more data or not.
 293                  */
 294                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
 295                 return PSMOUSE_GOOD_DATA;
 296         }
 297
 298         del_timer(&priv->timer);
 299
 300         if (psmouse->packet[6] & 0x80) {
 301
 302                 /*
 303                  * Highest bit is set - that means we either had
 304                  * complete ALPS packet and this is start of the
 305                  * next packet or we got garbage.
 306                  */
 307
 308                 if (((psmouse->packet[3] |
 309                       psmouse->packet[4] |
 310                       psmouse->packet[5]) & 0x80) ||
 311                     (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
 312                         dbg("refusing packet %x %x %x %x "
 313                             "(suspected interleaved ps/2)\n",
 314                             psmouse->packet[3], psmouse->packet[4],
 315                             psmouse->packet[5], psmouse->packet[6]);
 316                         return PSMOUSE_BAD_DATA;
 317                 }
 318
 319                 alps_process_packet(psmouse);
 320
 321                 /* Continue with the next packet */
 322                 psmouse->packet[0] = psmouse->packet[6];
 323                 psmouse->pktcnt = 1;
 324
 325         } else {
 326
 327                 /*
 328                  * High bit is 0 - that means that we indeed got a PS/2
 329                  * packet in the middle of ALPS packet.
 330                  *
 331                  * There is also possibility that we got 6-byte ALPS
 332                  * packet followed  by 3-byte packet from trackpoint. We
 333                  * can not distinguish between these 2 scenarios but
 334                  * becase the latter is unlikely to happen in course of
 335                  * normal operation (user would need to press all
 336                  * buttons on the pad and start moving trackpoint
 337                  * without touching the pad surface) we assume former.
 338                  * Even if we are wrong the wost thing that would happen
 339                  * the cursor would jump but we should not get protocol
 340                  * desynchronization.
 341                  */
 342
 343                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
 344                                             false);
 345
 346                 /*
 347                  * Continue with the standard ALPS protocol handling,
 348                  * but make sure we won't process it as an interleaved
 349                  * packet again, which may happen if all buttons are
 350                  * pressed. To avoid this let's reset the 4th bit which
 351                  * is normally 1.
 352                  */
 353                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
 354                 psmouse->pktcnt = 4;
 355         }
 356
 357         return PSMOUSE_GOOD_DATA;
 358 }
 359
 360 static void alps_flush_packet(unsigned long data)
 361 {
 362         struct psmouse *psmouse = (struct psmouse *)data;
 363
 364         serio_pause_rx(psmouse->ps2dev.serio);
 365
 366         if (psmouse->pktcnt == 6) {
 367
 368                 /*
 369                  * We did not any more data in reasonable amount of time.
 370                  * Validate the last 3 bytes and process as a standard
 371                  * ALPS packet.
 372                  */
 373                 if ((psmouse->packet[3] |
 374                      psmouse->packet[4] |
 375                      psmouse->packet[5]) & 0x80) {
 376                         dbg("refusing packet %x %x %x "
 377                             "(suspected interleaved ps/2)\n",
 378                             psmouse->packet[3], psmouse->packet[4],
 379                             psmouse->packet[5]);
 380                 } else {
 381                         alps_process_packet(psmouse);
 382                 }
 383                 psmouse->pktcnt = 0;
 384         }
 385
 386         serio_continue_rx(psmouse->ps2dev.serio);
 387 }
 388
 389 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 390 {
 391         struct alps_data *priv = psmouse->private;
 392         const struct alps_model_info *model = priv->i;
 393
 394         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 395                 if (psmouse->pktcnt == 3) {
 396                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
 397                                                     true);
 398                         return PSMOUSE_FULL_PACKET;
 399                 }
 400                 return PSMOUSE_GOOD_DATA;
 401         }
 402
 403         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
 404
 405         if ((model->flags & ALPS_PS2_INTERLEAVED) &&
 406             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
 407                 return alps_handle_interleaved_ps2(psmouse);
 408         }
 409
 410         if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
 411                 dbg("refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
 412                     psmouse->packet[0], model->mask0, model->byte0);
 413                 return PSMOUSE_BAD_DATA;
 414         }
 415
 416         /* Bytes 2 - 6 should have 0 in the highest bit */
 417         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 418             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
 419                 dbg("refusing packet[%i] = %x\n",
 420                     psmouse->pktcnt - 1, psmouse->packet[psmouse->pktcnt - 1]);
 421                 return PSMOUSE_BAD_DATA;
 422         }
 423
 424         if (psmouse->pktcnt == 6) {
 425                 alps_process_packet(psmouse);
 426                 return PSMOUSE_FULL_PACKET;
 427         }
 428
 429         return PSMOUSE_GOOD_DATA;
 430 }
 431
 432 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 433 {
 434         struct ps2dev *ps2dev = &psmouse->ps2dev;
 435         static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 436         unsigned char param[4];
 437         int i;
 438
 439         /*
 440          * First try "E6 report".
 441          * ALPS should return 0,0,10 or 0,0,100
 442          */
 443         param[0] = 0;
 444         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 445             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 446             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 447             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 448                 return NULL;
 449
 450         param[0] = param[1] = param[2] = 0xff;
 451         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 452                 return NULL;
 453
 454         dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 455
 456         if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 457                 return NULL;
 458
 459         /*
 460          * Now try "E7 report". Allowed responses are in
 461          * alps_model_data[].signature
 462          */
 463         param[0] = 0;
 464         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 465             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 466             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 467             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 468                 return NULL;
 469
 470         param[0] = param[1] = param[2] = 0xff;
 471         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 472                 return NULL;
 473
 474         dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 475
 476         if (version) {
 477                 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
 478                         /* empty */;
 479                 *version = (param[0] << 8) | (param[1] << 4) | i;
 480         }
 481
 482         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 483                 if (!memcmp(param, alps_model_data[i].signature,
 484                             sizeof(alps_model_data[i].signature)))
 485                         return alps_model_data + i;
 486
 487         return NULL;
 488 }
 489
 490 /*
 491  * For DualPoint devices select the device that should respond to
 492  * subsequent commands. It looks like glidepad is behind stickpointer,
 493  * I'd thought it would be other way around...
 494  */
 495 static int alps_passthrough_mode(struct psmouse *psmouse, bool enable)
 496 {
 497         struct ps2dev *ps2dev = &psmouse->ps2dev;
 498         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
 499
 500         if (ps2_command(ps2dev, NULL, cmd) ||
 501             ps2_command(ps2dev, NULL, cmd) ||
 502             ps2_command(ps2dev, NULL, cmd) ||
 503             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 504                 return -1;
 505
 506         /* we may get 3 more bytes, just ignore them */
 507         ps2_drain(ps2dev, 3, 100);
 508
 509         return 0;
 510 }
 511
 512 static int alps_absolute_mode(struct psmouse *psmouse)
 513 {
 514         struct ps2dev *ps2dev = &psmouse->ps2dev;
 515
 516         /* Try ALPS magic knock - 4 disable before enable */
 517         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 518             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 519             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 520             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 521             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 522                 return -1;
 523
 524         /*
 525          * Switch mouse to poll (remote) mode so motion data will not
 526          * get in our way
 527          */
 528         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 529 }
 530
 531 static int alps_get_status(struct psmouse *psmouse, char *param)
 532 {
 533         struct ps2dev *ps2dev = &psmouse->ps2dev;
 534
 535         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
 536         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 537             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 538             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 539             ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 540                 return -1;
 541
 542         dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 543
 544         return 0;
 545 }
 546
 547 /*
 548  * Turn touchpad tapping on or off. The sequences are:
 549  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 550  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 551  * My guess that 0xE9 (GetInfo) is here as a sync point.
 552  * For models that also have stickpointer (DualPoints) its tapping
 553  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 554  * we don't fiddle with it.
 555  */
 556 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 557 {
 558         struct ps2dev *ps2dev = &psmouse->ps2dev;
 559         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 560         unsigned char tap_arg = enable ? 0x0A : 0x00;
 561         unsigned char param[4];
 562
 563         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 564             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 565             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 566             ps2_command(ps2dev, &tap_arg, cmd))
 567                 return -1;
 568
 569         if (alps_get_status(psmouse, param))
 570                 return -1;
 571
 572         return 0;
 573 }
 574
 575 /*
 576  * alps_poll() - poll the touchpad for current motion packet.
 577  * Used in resync.
 578  */
 579 static int alps_poll(struct psmouse *psmouse)
 580 {
 581         struct alps_data *priv = psmouse->private;
 582         unsigned char buf[6];
 583         bool poll_failed;
 584
 585         if (priv->i->flags & ALPS_PASS)
 586                 alps_passthrough_mode(psmouse, true);
 587
 588         poll_failed = ps2_command(&psmouse->ps2dev, buf,
 589                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
 590
 591         if (priv->i->flags & ALPS_PASS)
 592                 alps_passthrough_mode(psmouse, false);
 593
 594         if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
 595                 return -1;
 596
 597         if ((psmouse->badbyte & 0xc8) == 0x08) {
 598 /*
 599  * Poll the track stick ...
 600  */
 601                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
 602                         return -1;
 603         }
 604
 605         memcpy(psmouse->packet, buf, sizeof(buf));
 606         return 0;
 607 }
 608
 609 static int alps_hw_init(struct psmouse *psmouse)
 610 {
 611         struct alps_data *priv = psmouse->private;
 612         const struct alps_model_info *model = priv->i;
 613
 614         if ((model->flags & ALPS_PASS) &&
 615             alps_passthrough_mode(psmouse, true)) {
 616                 return -1;
 617         }
 618
 619         if (alps_tap_mode(psmouse, true)) {
 620                 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 621                 return -1;
 622         }
 623
 624         if (alps_absolute_mode(psmouse)) {
 625                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 626                 return -1;
 627         }
 628
 629         if ((model->flags & ALPS_PASS) &&
 630             alps_passthrough_mode(psmouse, false)) {
 631                 return -1;
 632         }
 633
 634         /* ALPS needs stream mode, otherwise it won't report any data */
 635         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
 636                 printk(KERN_ERR "alps.c: Failed to enable stream mode\n");
 637                 return -1;
 638         }
 639
 640         return 0;
 641 }
 642
 643 static int alps_reconnect(struct psmouse *psmouse)
 644 {
 645         const struct alps_model_info *model;
 646
 647         psmouse_reset(psmouse);
 648
 649         model = alps_get_model(psmouse, NULL);
 650         if (!model)
 651                 return -1;
 652
 653         return alps_hw_init(psmouse);
 654 }
 655
 656 static void alps_disconnect(struct psmouse *psmouse)
 657 {
 658         struct alps_data *priv = psmouse->private;
 659
 660         psmouse_reset(psmouse);
 661         del_timer_sync(&priv->timer);
 662         input_unregister_device(priv->dev2);
 663         kfree(priv);
 664 }
 665
 666 int alps_init(struct psmouse *psmouse)
 667 {
 668         struct alps_data *priv;
 669         const struct alps_model_info *model;
 670         struct input_dev *dev1 = psmouse->dev, *dev2;
 671         int version;
 672
 673         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
 674         dev2 = input_allocate_device();
 675         if (!priv || !dev2)
 676                 goto init_fail;
 677
 678         priv->dev2 = dev2;
 679         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
 680
 681         psmouse->private = priv;
 682
 683         model = alps_get_model(psmouse, &version);
 684         if (!model)
 685                 goto init_fail;
 686
 687         priv->i = model;
 688
 689         if (alps_hw_init(psmouse))
 690                 goto init_fail;
 691
 692         /*
 693          * Undo part of setup done for us by psmouse core since touchpad
 694          * is not a relative device.
 695          */
 696         __clear_bit(EV_REL, dev1->evbit);
 697         __clear_bit(REL_X, dev1->relbit);
 698         __clear_bit(REL_Y, dev1->relbit);
 699
 700         /*
 701          * Now set up our capabilities.
 702          */
 703         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
 704         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
 705         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
 706         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
 707                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
 708
 709         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
 710         input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
 711         input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
 712         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
 713
 714         if (model->flags & ALPS_WHEEL) {
 715                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
 716                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
 717         }
 718
 719         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 720                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
 721                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
 722         }
 723
 724         if (model->flags & ALPS_FOUR_BUTTONS) {
 725                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
 726                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
 727                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
 728                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
 729         } else {
 730                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
 731         }
 732
 733         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
 734         dev2->phys = priv->phys;
 735         dev2->name = (model->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 736         dev2->id.bustype = BUS_I8042;
 737         dev2->id.vendor  = 0x0002;
 738         dev2->id.product = PSMOUSE_ALPS;
 739         dev2->id.version = 0x0000;
 740         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
 741
 742         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 743         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 744         dev2->keybit[BIT_WORD(BTN_LEFT)] =
 745                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 746
 747         if (input_register_device(priv->dev2))
 748                 goto init_fail;
 749
 750         psmouse->protocol_handler = alps_process_byte;
 751         psmouse->poll = alps_poll;
 752         psmouse->disconnect = alps_disconnect;
 753         psmouse->reconnect = alps_reconnect;
 754         psmouse->pktsize = 6;
 755
 756         /* We are having trouble resyncing ALPS touchpads so disable it for now */
 757         psmouse->resync_time = 0;
 758
 759         return 0;
 760
 761 init_fail:
 762         psmouse_reset(psmouse);
 763         input_free_device(dev2);
 764         kfree(priv);
 765         psmouse->private = NULL;
 766         return -1;
 767 }
 768
 769 int alps_detect(struct psmouse *psmouse, bool set_properties)
 770 {
 771         int version;
 772         const struct alps_model_info *model;
 773
 774         model = alps_get_model(psmouse, &version);
 775         if (!model)
 776                 return -1;
 777
 778         if (set_properties) {
 779                 psmouse->vendor = "ALPS";
 780                 psmouse->name = model->flags & ALPS_DUALPOINT ?
 781                                 "DualPoint TouchPad" : "GlidePoint";
 782                 psmouse->model = version;
 783         }
 784         return 0;
 785 }
 786