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