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 #undef DEBUG
  27 #ifdef DEBUG
  28 #define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
  29 #else
  30 #define dbg(format, arg...) do {} while (0)
  31 #endif
  32
  33 #define ALPS_OLDPROTO           0x01    /* old style input */
  34 #define ALPS_DUALPOINT          0x02    /* touchpad has trackstick */
  35 #define ALPS_PASS               0x04    /* device has a pass-through port */
  36
  37 #define ALPS_WHEEL              0x08    /* hardware wheel present */
  38 #define ALPS_FW_BK_1            0x10    /* front & back buttons present */
  39 #define ALPS_FW_BK_2            0x20    /* front & back buttons present */
  40 #define ALPS_FOUR_BUTTONS       0x40    /* 4 direction button present */
  41 #define ALPS_PS2_INTERLEAVED    0x80    /* 3-byte PS/2 packet interleaved with
  42                                            6-byte ALPS packet */
  43
  44 static const struct alps_model_info alps_model_data[] = {
  45         { { 0x32, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
  46         { { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO },              /* UMAX-530T */
  47         { { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  48         { { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  49         { { 0x60, 0x03, 0xc8 }, 0xf8, 0xf8, 0 },                          /* HP ze1115 */
  50         { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  51         { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  52         { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, ALPS_FW_BK_2 },               /* Fujitsu Siemens S6010 */
  53         { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL },                 /* Toshiba Satellite S2400-103 */
  54         { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK_1 },               /* NEC Versa L320 */
  55         { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
  56         { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D800 */
  57         { { 0x73, 0x00, 0x0a }, 0xf8, 0xf8, ALPS_DUALPOINT },             /* ThinkPad R61 8918-5QG */
  58         { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  59         { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_FW_BK_2 },               /* Ahtec Laptop */
  60         { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
  61         { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
  62         { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
  63         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
  64         { { 0x62, 0x02, 0x14 }, 0xcf, 0xcf,
  65                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
  66         { { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FOUR_BUTTONS },          /* Dell Vostro 1400 */
  67         { { 0x52, 0x01, 0x14 }, 0xff, 0xff,
  68                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },      /* Toshiba Tecra A11-11L */
  69 };
  70
  71 /*
  72  * XXX - this entry is suspicious. First byte has zero lower nibble,
  73  * which is what a normal mouse would report. Also, the value 0x0e
  74  * isn't valid per PS/2 spec.
  75  */
  76
  77 /*
  78  * PS/2 packet format
  79  *
  80  * byte 0:  0    0 YSGN XSGN    1    M    R    L
  81  * byte 1: X7   X6   X5   X4   X3   X2   X1   X0
  82  * byte 2: Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
  83  *
  84  * Note that the device never signals overflow condition.
  85  *
  86  * ALPS absolute Mode - new format
  87  *
  88  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  89  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
  90  * byte 2:  0  x10   x9   x8   x7    ?  fin  ges
  91  * byte 3:  0   y9   y8   y7    1    M    R    L
  92  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  93  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  94  *
  95  * Dualpoint device -- interleaved packet format
  96  *
  97  * byte 0:    1    1    0    0    1    1    1    1
  98  * byte 1:    0   x6   x5   x4   x3   x2   x1   x0
  99  * byte 2:    0  x10   x9   x8   x7    0  fin  ges
 100  * byte 3:    0    0 YSGN XSGN    1    1    1    1
 101  * byte 4:   X7   X6   X5   X4   X3   X2   X1   X0
 102  * byte 5:   Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
 103  * byte 6:    0   y9   y8   y7    1    m    r    l
 104  * byte 7:    0   y6   y5   y4   y3   y2   y1   y0
 105  * byte 8:    0   z6   z5   z4   z3   z2   z1   z0
 106  *
 107  * CAPITALS = stick, miniscules = touchpad
 108  *
 109  * ?'s can have different meanings on different models,
 110  * such as wheel rotation, extra buttons, stick buttons
 111  * on a dualpoint, etc.
 112  */
 113
 114 static bool alps_is_valid_first_byte(const struct alps_model_info *model,
 115                                      unsigned char data)
 116 {
 117         return (data & model->mask0) == model->byte0;
 118 }
 119
 120 static void alps_report_buttons(struct psmouse *psmouse,
 121                                 struct input_dev *dev1, struct input_dev *dev2,
 122                                 int left, int right, int middle)
 123 {
 124         struct input_dev *dev;
 125
 126         /*
 127          * If shared button has already been reported on the
 128          * other device (dev2) then this event should be also
 129          * sent through that device.
 130          */
 131         dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
 132         input_report_key(dev, BTN_LEFT, left);
 133
 134         dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
 135         input_report_key(dev, BTN_RIGHT, right);
 136
 137         dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
 138         input_report_key(dev, BTN_MIDDLE, middle);
 139
 140         /*
 141          * Sync the _other_ device now, we'll do the first
 142          * device later once we report the rest of the events.
 143          */
 144         input_sync(dev2);
 145 }
 146
 147 static void alps_process_packet(struct psmouse *psmouse)
 148 {
 149         struct alps_data *priv = psmouse->private;
 150         const struct alps_model_info *model = priv->i;
 151         unsigned char *packet = psmouse->packet;
 152         struct input_dev *dev = psmouse->dev;
 153         struct input_dev *dev2 = priv->dev2;
 154         int x, y, z, ges, fin, left, right, middle;
 155         int back = 0, forward = 0;
 156
 157         if (model->flags & ALPS_OLDPROTO) {
 158                 left = packet[2] & 0x10;
 159                 right = packet[2] & 0x08;
 160                 middle = 0;
 161                 x = packet[1] | ((packet[0] & 0x07) << 7);
 162                 y = packet[4] | ((packet[3] & 0x07) << 7);
 163                 z = packet[5];
 164         } else {
 165                 left = packet[3] & 1;
 166                 right = packet[3] & 2;
 167                 middle = packet[3] & 4;
 168                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 169                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 170                 z = packet[5];
 171         }
 172
 173         if (model->flags & ALPS_FW_BK_1) {
 174                 back = packet[0] & 0x10;
 175                 forward = packet[2] & 4;
 176         }
 177
 178         if (model->flags & ALPS_FW_BK_2) {
 179                 back = packet[3] & 4;
 180                 forward = packet[2] & 4;
 181                 if ((middle = forward && back))
 182                         forward = back = 0;
 183         }
 184
 185         ges = packet[2] & 1;
 186         fin = packet[2] & 2;
 187
 188         if ((model->flags & ALPS_DUALPOINT) && z == 127) {
 189                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 190                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 191
 192                 alps_report_buttons(psmouse, dev2, dev, left, right, middle);
 193
 194                 input_sync(dev2);
 195                 return;
 196         }
 197
 198         alps_report_buttons(psmouse, dev, dev2, left, right, middle);
 199
 200         /* Convert hardware tap to a reasonable Z value */
 201         if (ges && !fin)
 202                 z = 40;
 203
 204         /*
 205          * A "tap and drag" operation is reported by the hardware as a transition
 206          * from (!fin && ges) to (fin && ges). This should be translated to the
 207          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 208          */
 209         if (ges && fin && !priv->prev_fin) {
 210                 input_report_abs(dev, ABS_X, x);
 211                 input_report_abs(dev, ABS_Y, y);
 212                 input_report_abs(dev, ABS_PRESSURE, 0);
 213                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 214                 input_sync(dev);
 215         }
 216         priv->prev_fin = fin;
 217
 218         if (z > 30)
 219                 input_report_key(dev, BTN_TOUCH, 1);
 220         if (z < 25)
 221                 input_report_key(dev, BTN_TOUCH, 0);
 222
 223         if (z > 0) {
 224                 input_report_abs(dev, ABS_X, x);
 225                 input_report_abs(dev, ABS_Y, y);
 226         }
 227
 228         input_report_abs(dev, ABS_PRESSURE, z);
 229         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 230
 231         if (model->flags & ALPS_WHEEL)
 232                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 233
 234         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 235                 input_report_key(dev, BTN_FORWARD, forward);
 236                 input_report_key(dev, BTN_BACK, back);
 237         }
 238
 239         if (model->flags & ALPS_FOUR_BUTTONS) {
 240                 input_report_key(dev, BTN_0, packet[2] & 4);
 241                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 242                 input_report_key(dev, BTN_2, packet[3] & 4);
 243                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 244         }
 245
 246         input_sync(dev);
 247 }
 248
 249 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 250                                         unsigned char packet[],
 251                                         bool report_buttons)
 252 {
 253         struct alps_data *priv = psmouse->private;
 254         struct input_dev *dev2 = priv->dev2;
 255
 256         if (report_buttons)
 257                 alps_report_buttons(psmouse, dev2, psmouse->dev,
 258                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
 259
 260         input_report_rel(dev2, REL_X,
 261                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
 262         input_report_rel(dev2, REL_Y,
 263                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
 264
 265         input_sync(dev2);
 266 }
 267
 268 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 269 {
 270         struct alps_data *priv = psmouse->private;
 271
 272         if (psmouse->pktcnt < 6)
 273                 return PSMOUSE_GOOD_DATA;
 274
 275         if (psmouse->pktcnt == 6) {
 276                 /*
 277                  * Start a timer to flush the packet if it ends up last
 278                  * 6-byte packet in the stream. Timer needs to fire
 279                  * psmouse core times out itself. 20 ms should be enough
 280                  * to decide if we are getting more data or not.
 281                  */
 282                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
 283                 return PSMOUSE_GOOD_DATA;
 284         }
 285
 286         del_timer(&priv->timer);
 287
 288         if (psmouse->packet[6] & 0x80) {
 289
 290                 /*
 291                  * Highest bit is set - that means we either had
 292                  * complete ALPS packet and this is start of the
 293                  * next packet or we got garbage.
 294                  */
 295
 296                 if (((psmouse->packet[3] |
 297                       psmouse->packet[4] |
 298                       psmouse->packet[5]) & 0x80) ||
 299                     (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
 300                         dbg("refusing packet %x %x %x %x "
 301                             "(suspected interleaved ps/2)\n",
 302                             psmouse->packet[3], psmouse->packet[4],
 303                             psmouse->packet[5], psmouse->packet[6]);
 304                         return PSMOUSE_BAD_DATA;
 305                 }
 306
 307                 alps_process_packet(psmouse);
 308
 309                 /* Continue with the next packet */
 310                 psmouse->packet[0] = psmouse->packet[6];
 311                 psmouse->pktcnt = 1;
 312
 313         } else {
 314
 315                 /*
 316                  * High bit is 0 - that means that we indeed got a PS/2
 317                  * packet in the middle of ALPS packet.
 318                  *
 319                  * There is also possibility that we got 6-byte ALPS
 320                  * packet followed  by 3-byte packet from trackpoint. We
 321                  * can not distinguish between these 2 scenarios but
 322                  * becase the latter is unlikely to happen in course of
 323                  * normal operation (user would need to press all
 324                  * buttons on the pad and start moving trackpoint
 325                  * without touching the pad surface) we assume former.
 326                  * Even if we are wrong the wost thing that would happen
 327                  * the cursor would jump but we should not get protocol
 328                  * desynchronization.
 329                  */
 330
 331                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
 332                                             false);
 333
 334                 /*
 335                  * Continue with the standard ALPS protocol handling,
 336                  * but make sure we won't process it as an interleaved
 337                  * packet again, which may happen if all buttons are
 338                  * pressed. To avoid this let's reset the 4th bit which
 339                  * is normally 1.
 340                  */
 341                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
 342                 psmouse->pktcnt = 4;
 343         }
 344
 345         return PSMOUSE_GOOD_DATA;
 346 }
 347
 348 static void alps_flush_packet(unsigned long data)
 349 {
 350         struct psmouse *psmouse = (struct psmouse *)data;
 351
 352         serio_pause_rx(psmouse->ps2dev.serio);
 353
 354         if (psmouse->pktcnt == 6) {
 355
 356                 /*
 357                  * We did not any more data in reasonable amount of time.
 358                  * Validate the last 3 bytes and process as a standard
 359                  * ALPS packet.
 360                  */
 361                 if ((psmouse->packet[3] |
 362                      psmouse->packet[4] |
 363                      psmouse->packet[5]) & 0x80) {
 364                         dbg("refusing packet %x %x %x "
 365                             "(suspected interleaved ps/2)\n",
 366                             psmouse->packet[3], psmouse->packet[4],
 367                             psmouse->packet[5]);
 368                 } else {
 369                         alps_process_packet(psmouse);
 370                 }
 371                 psmouse->pktcnt = 0;
 372         }
 373
 374         serio_continue_rx(psmouse->ps2dev.serio);
 375 }
 376
 377 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 378 {
 379         struct alps_data *priv = psmouse->private;
 380         const struct alps_model_info *model = priv->i;
 381
 382         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 383                 if (psmouse->pktcnt == 3) {
 384                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
 385                                                     true);
 386                         return PSMOUSE_FULL_PACKET;
 387                 }
 388                 return PSMOUSE_GOOD_DATA;
 389         }
 390
 391         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
 392
 393         if ((model->flags & ALPS_PS2_INTERLEAVED) &&
 394             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
 395                 return alps_handle_interleaved_ps2(psmouse);
 396         }
 397
 398         if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
 399                 dbg("refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
 400                     psmouse->packet[0], model->mask0, model->byte0);
 401                 return PSMOUSE_BAD_DATA;
 402         }
 403
 404         /* Bytes 2 - 6 should have 0 in the highest bit */
 405         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 406             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
 407                 dbg("refusing packet[%i] = %x\n",
 408                     psmouse->pktcnt - 1, psmouse->packet[psmouse->pktcnt - 1]);
 409                 return PSMOUSE_BAD_DATA;
 410         }
 411
 412         if (psmouse->pktcnt == 6) {
 413                 alps_process_packet(psmouse);
 414                 return PSMOUSE_FULL_PACKET;
 415         }
 416
 417         return PSMOUSE_GOOD_DATA;
 418 }
 419
 420 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 421 {
 422         struct ps2dev *ps2dev = &psmouse->ps2dev;
 423         static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 424         unsigned char param[4];
 425         int i;
 426
 427         /*
 428          * First try "E6 report".
 429          * ALPS should return 0,0,10 or 0,0,100
 430          */
 431         param[0] = 0;
 432         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 433             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 434             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 435             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 436                 return NULL;
 437
 438         param[0] = param[1] = param[2] = 0xff;
 439         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 440                 return NULL;
 441
 442         dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 443
 444         if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 445                 return NULL;
 446
 447         /*
 448          * Now try "E7 report". Allowed responses are in
 449          * alps_model_data[].signature
 450          */
 451         param[0] = 0;
 452         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 453             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 454             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 455             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 456                 return NULL;
 457
 458         param[0] = param[1] = param[2] = 0xff;
 459         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 460                 return NULL;
 461
 462         dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 463
 464         if (version) {
 465                 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
 466                         /* empty */;
 467                 *version = (param[0] << 8) | (param[1] << 4) | i;
 468         }
 469
 470         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 471                 if (!memcmp(param, alps_model_data[i].signature,
 472                             sizeof(alps_model_data[i].signature)))
 473                         return alps_model_data + i;
 474
 475         return NULL;
 476 }
 477
 478 /*
 479  * For DualPoint devices select the device that should respond to
 480  * subsequent commands. It looks like glidepad is behind stickpointer,
 481  * I'd thought it would be other way around...
 482  */
 483 static int alps_passthrough_mode(struct psmouse *psmouse, bool enable)
 484 {
 485         struct ps2dev *ps2dev = &psmouse->ps2dev;
 486         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
 487
 488         if (ps2_command(ps2dev, NULL, cmd) ||
 489             ps2_command(ps2dev, NULL, cmd) ||
 490             ps2_command(ps2dev, NULL, cmd) ||
 491             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 492                 return -1;
 493
 494         /* we may get 3 more bytes, just ignore them */
 495         ps2_drain(ps2dev, 3, 100);
 496
 497         return 0;
 498 }
 499
 500 static int alps_absolute_mode(struct psmouse *psmouse)
 501 {
 502         struct ps2dev *ps2dev = &psmouse->ps2dev;
 503
 504         /* Try ALPS magic knock - 4 disable before enable */
 505         if (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_DISABLE) ||
 509             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 510                 return -1;
 511
 512         /*
 513          * Switch mouse to poll (remote) mode so motion data will not
 514          * get in our way
 515          */
 516         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 517 }
 518
 519 static int alps_get_status(struct psmouse *psmouse, char *param)
 520 {
 521         struct ps2dev *ps2dev = &psmouse->ps2dev;
 522
 523         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
 524         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 525             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 526             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 527             ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 528                 return -1;
 529
 530         dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 531
 532         return 0;
 533 }
 534
 535 /*
 536  * Turn touchpad tapping on or off. The sequences are:
 537  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 538  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 539  * My guess that 0xE9 (GetInfo) is here as a sync point.
 540  * For models that also have stickpointer (DualPoints) its tapping
 541  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 542  * we don't fiddle with it.
 543  */
 544 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 545 {
 546         struct ps2dev *ps2dev = &psmouse->ps2dev;
 547         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 548         unsigned char tap_arg = enable ? 0x0A : 0x00;
 549         unsigned char param[4];
 550
 551         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 552             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 553             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 554             ps2_command(ps2dev, &tap_arg, cmd))
 555                 return -1;
 556
 557         if (alps_get_status(psmouse, param))
 558                 return -1;
 559
 560         return 0;
 561 }
 562
 563 /*
 564  * alps_poll() - poll the touchpad for current motion packet.
 565  * Used in resync.
 566  */
 567 static int alps_poll(struct psmouse *psmouse)
 568 {
 569         struct alps_data *priv = psmouse->private;
 570         unsigned char buf[6];
 571         bool poll_failed;
 572
 573         if (priv->i->flags & ALPS_PASS)
 574                 alps_passthrough_mode(psmouse, true);
 575
 576         poll_failed = ps2_command(&psmouse->ps2dev, buf,
 577                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
 578
 579         if (priv->i->flags & ALPS_PASS)
 580                 alps_passthrough_mode(psmouse, false);
 581
 582         if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
 583                 return -1;
 584
 585         if ((psmouse->badbyte & 0xc8) == 0x08) {
 586 /*
 587  * Poll the track stick ...
 588  */
 589                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
 590                         return -1;
 591         }
 592
 593         memcpy(psmouse->packet, buf, sizeof(buf));
 594         return 0;
 595 }
 596
 597 static int alps_hw_init(struct psmouse *psmouse)
 598 {
 599         struct alps_data *priv = psmouse->private;
 600         const struct alps_model_info *model = priv->i;
 601
 602         if ((model->flags & ALPS_PASS) &&
 603             alps_passthrough_mode(psmouse, true)) {
 604                 return -1;
 605         }
 606
 607         if (alps_tap_mode(psmouse, true)) {
 608                 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 609                 return -1;
 610         }
 611
 612         if (alps_absolute_mode(psmouse)) {
 613                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 614                 return -1;
 615         }
 616
 617         if ((model->flags & ALPS_PASS) &&
 618             alps_passthrough_mode(psmouse, false)) {
 619                 return -1;
 620         }
 621
 622         /* ALPS needs stream mode, otherwise it won't report any data */
 623         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
 624                 printk(KERN_ERR "alps.c: Failed to enable stream mode\n");
 625                 return -1;
 626         }
 627
 628         return 0;
 629 }
 630
 631 static int alps_reconnect(struct psmouse *psmouse)
 632 {
 633         const struct alps_model_info *model;
 634
 635         psmouse_reset(psmouse);
 636
 637         model = alps_get_model(psmouse, NULL);
 638         if (!model)
 639                 return -1;
 640
 641         return alps_hw_init(psmouse);
 642 }
 643
 644 static void alps_disconnect(struct psmouse *psmouse)
 645 {
 646         struct alps_data *priv = psmouse->private;
 647
 648         psmouse_reset(psmouse);
 649         del_timer_sync(&priv->timer);
 650         input_unregister_device(priv->dev2);
 651         kfree(priv);
 652 }
 653
 654 int alps_init(struct psmouse *psmouse)
 655 {
 656         struct alps_data *priv;
 657         const struct alps_model_info *model;
 658         struct input_dev *dev1 = psmouse->dev, *dev2;
 659         int version;
 660
 661         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
 662         dev2 = input_allocate_device();
 663         if (!priv || !dev2)
 664                 goto init_fail;
 665
 666         priv->dev2 = dev2;
 667         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
 668
 669         psmouse->private = priv;
 670
 671         model = alps_get_model(psmouse, &version);
 672         if (!model)
 673                 goto init_fail;
 674
 675         priv->i = model;
 676
 677         if (alps_hw_init(psmouse))
 678                 goto init_fail;
 679
 680         /*
 681          * Undo part of setup done for us by psmouse core since touchpad
 682          * is not a relative device.
 683          */
 684         __clear_bit(EV_REL, dev1->evbit);
 685         __clear_bit(REL_X, dev1->relbit);
 686         __clear_bit(REL_Y, dev1->relbit);
 687
 688         /*
 689          * Now set up our capabilities.
 690          */
 691         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
 692         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
 693         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
 694         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
 695                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
 696
 697         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
 698         input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
 699         input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
 700         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
 701
 702         if (model->flags & ALPS_WHEEL) {
 703                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
 704                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
 705         }
 706
 707         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 708                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
 709                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
 710         }
 711
 712         if (model->flags & ALPS_FOUR_BUTTONS) {
 713                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
 714                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
 715                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
 716                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
 717         } else {
 718                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
 719         }
 720
 721         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
 722         dev2->phys = priv->phys;
 723         dev2->name = (model->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 724         dev2->id.bustype = BUS_I8042;
 725         dev2->id.vendor  = 0x0002;
 726         dev2->id.product = PSMOUSE_ALPS;
 727         dev2->id.version = 0x0000;
 728         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
 729
 730         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 731         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 732         dev2->keybit[BIT_WORD(BTN_LEFT)] =
 733                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 734
 735         if (input_register_device(priv->dev2))
 736                 goto init_fail;
 737
 738         psmouse->protocol_handler = alps_process_byte;
 739         psmouse->poll = alps_poll;
 740         psmouse->disconnect = alps_disconnect;
 741         psmouse->reconnect = alps_reconnect;
 742         psmouse->pktsize = 6;
 743
 744         /* We are having trouble resyncing ALPS touchpads so disable it for now */
 745         psmouse->resync_time = 0;
 746
 747         return 0;
 748
 749 init_fail:
 750         psmouse_reset(psmouse);
 751         input_free_device(dev2);
 752         kfree(priv);
 753         psmouse->private = NULL;
 754         return -1;
 755 }
 756
 757 int alps_detect(struct psmouse *psmouse, bool set_properties)
 758 {
 759         int version;
 760         const struct alps_model_info *model;
 761
 762         model = alps_get_model(psmouse, &version);
 763         if (!model)
 764                 return -1;
 765
 766         if (set_properties) {
 767                 psmouse->vendor = "ALPS";
 768                 psmouse->name = model->flags & ALPS_DUALPOINT ?
 769                                 "DualPoint TouchPad" : "GlidePoint";
 770                 psmouse->model = version;
 771         }
 772         return 0;
 773 }
 774