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 };
  67
  68 /*
  69  * XXX - this entry is suspicious. First byte has zero lower nibble,
  70  * which is what a normal mouse would report. Also, the value 0x0e
  71  * isn't valid per PS/2 spec.
  72  */
  73
  74 /*
  75  * PS/2 packet format
  76  *
  77  * byte 0:  0    0 YSGN XSGN    1    M    R    L
  78  * byte 1: X7   X6   X5   X4   X3   X2   X1   X0
  79  * byte 2: Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
  80  *
  81  * Note that the device never signals overflow condition.
  82  *
  83  * ALPS absolute Mode - new format
  84  *
  85  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  86  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
  87  * byte 2:  0  x10   x9   x8   x7    ?  fin  ges
  88  * byte 3:  0   y9   y8   y7    1    M    R    L
  89  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  90  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  91  *
  92  * Dualpoint device -- interleaved packet format
  93  *
  94  * byte 0:    1    1    0    0    1    1    1    1
  95  * byte 1:    0   x6   x5   x4   x3   x2   x1   x0
  96  * byte 2:    0  x10   x9   x8   x7    0  fin  ges
  97  * byte 3:    0    0 YSGN XSGN    1    1    1    1
  98  * byte 4:   X7   X6   X5   X4   X3   X2   X1   X0
  99  * byte 5:   Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
 100  * byte 6:    0   y9   y8   y7    1    m    r    l
 101  * byte 7:    0   y6   y5   y4   y3   y2   y1   y0
 102  * byte 8:    0   z6   z5   z4   z3   z2   z1   z0
 103  *
 104  * CAPITALS = stick, miniscules = touchpad
 105  *
 106  * ?'s can have different meanings on different models,
 107  * such as wheel rotation, extra buttons, stick buttons
 108  * on a dualpoint, etc.
 109  */
 110
 111 static bool alps_is_valid_first_byte(const struct alps_model_info *model,
 112                                      unsigned char data)
 113 {
 114         return (data & model->mask0) == model->byte0;
 115 }
 116
 117 static void alps_report_buttons(struct psmouse *psmouse,
 118                                 struct input_dev *dev1, struct input_dev *dev2,
 119                                 int left, int right, int middle)
 120 {
 121         struct alps_data *priv = psmouse->private;
 122         const struct alps_model_info *model = priv->i;
 123
 124         if (model->flags & ALPS_PS2_INTERLEAVED) {
 125                 struct input_dev *dev;
 126
 127                 /*
 128                  * If shared button has already been reported on the
 129                  * other device (dev2) then this event should be also
 130                  * sent through that device.
 131                  */
 132                 dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
 133                 input_report_key(dev, BTN_LEFT, left);
 134
 135                 dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
 136                 input_report_key(dev, BTN_RIGHT, right);
 137
 138                 dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
 139                 input_report_key(dev, BTN_MIDDLE, middle);
 140
 141                 /*
 142                  * Sync the _other_ device now, we'll do the first
 143                  * device later once we report the rest of the events.
 144                  */
 145                 input_sync(dev2);
 146         } else {
 147                 /*
 148                  * For devices with non-interleaved packets we know what
 149                  * device buttons belong to so we can simply report them.
 150                  */
 151                 input_report_key(dev1, BTN_LEFT, left);
 152                 input_report_key(dev1, BTN_RIGHT, right);
 153                 input_report_key(dev1, BTN_MIDDLE, middle);
 154         }
 155 }
 156
 157 static void alps_process_packet(struct psmouse *psmouse)
 158 {
 159         struct alps_data *priv = psmouse->private;
 160         const struct alps_model_info *model = priv->i;
 161         unsigned char *packet = psmouse->packet;
 162         struct input_dev *dev = psmouse->dev;
 163         struct input_dev *dev2 = priv->dev2;
 164         int x, y, z, ges, fin, left, right, middle;
 165         int back = 0, forward = 0;
 166
 167         if (model->flags & ALPS_OLDPROTO) {
 168                 left = packet[2] & 0x10;
 169                 right = packet[2] & 0x08;
 170                 middle = 0;
 171                 x = packet[1] | ((packet[0] & 0x07) << 7);
 172                 y = packet[4] | ((packet[3] & 0x07) << 7);
 173                 z = packet[5];
 174         } else {
 175                 left = packet[3] & 1;
 176                 right = packet[3] & 2;
 177                 middle = packet[3] & 4;
 178                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 179                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 180                 z = packet[5];
 181         }
 182
 183         if (model->flags & ALPS_FW_BK_1) {
 184                 back = packet[0] & 0x10;
 185                 forward = packet[2] & 4;
 186         }
 187
 188         if (model->flags & ALPS_FW_BK_2) {
 189                 back = packet[3] & 4;
 190                 forward = packet[2] & 4;
 191                 if ((middle = forward && back))
 192                         forward = back = 0;
 193         }
 194
 195         ges = packet[2] & 1;
 196         fin = packet[2] & 2;
 197
 198         if ((model->flags & ALPS_DUALPOINT) && z == 127) {
 199                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 200                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 201
 202                 alps_report_buttons(psmouse, dev2, dev, left, right, middle);
 203
 204                 input_sync(dev2);
 205                 return;
 206         }
 207
 208         alps_report_buttons(psmouse, dev, dev2, left, right, middle);
 209
 210         /* Convert hardware tap to a reasonable Z value */
 211         if (ges && !fin)
 212                 z = 40;
 213
 214         /*
 215          * A "tap and drag" operation is reported by the hardware as a transition
 216          * from (!fin && ges) to (fin && ges). This should be translated to the
 217          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 218          */
 219         if (ges && fin && !priv->prev_fin) {
 220                 input_report_abs(dev, ABS_X, x);
 221                 input_report_abs(dev, ABS_Y, y);
 222                 input_report_abs(dev, ABS_PRESSURE, 0);
 223                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 224                 input_sync(dev);
 225         }
 226         priv->prev_fin = fin;
 227
 228         if (z > 30)
 229                 input_report_key(dev, BTN_TOUCH, 1);
 230         if (z < 25)
 231                 input_report_key(dev, BTN_TOUCH, 0);
 232
 233         if (z > 0) {
 234                 input_report_abs(dev, ABS_X, x);
 235                 input_report_abs(dev, ABS_Y, y);
 236         }
 237
 238         input_report_abs(dev, ABS_PRESSURE, z);
 239         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 240
 241         if (model->flags & ALPS_WHEEL)
 242                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 243
 244         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 245                 input_report_key(dev, BTN_FORWARD, forward);
 246                 input_report_key(dev, BTN_BACK, back);
 247         }
 248
 249         if (model->flags & ALPS_FOUR_BUTTONS) {
 250                 input_report_key(dev, BTN_0, packet[2] & 4);
 251                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 252                 input_report_key(dev, BTN_2, packet[3] & 4);
 253                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 254         }
 255
 256         input_sync(dev);
 257 }
 258
 259 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 260                                         unsigned char packet[],
 261                                         bool report_buttons)
 262 {
 263         struct alps_data *priv = psmouse->private;
 264         struct input_dev *dev2 = priv->dev2;
 265
 266         if (report_buttons)
 267                 alps_report_buttons(psmouse, dev2, psmouse->dev,
 268                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
 269
 270         input_report_rel(dev2, REL_X,
 271                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
 272         input_report_rel(dev2, REL_Y,
 273                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
 274
 275         input_sync(dev2);
 276 }
 277
 278 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 279 {
 280         struct alps_data *priv = psmouse->private;
 281
 282         if (psmouse->pktcnt < 6)
 283                 return PSMOUSE_GOOD_DATA;
 284
 285         if (psmouse->pktcnt == 6) {
 286                 /*
 287                  * Start a timer to flush the packet if it ends up last
 288                  * 6-byte packet in the stream. Timer needs to fire
 289                  * psmouse core times out itself. 20 ms should be enough
 290                  * to decide if we are getting more data or not.
 291                  */
 292                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
 293                 return PSMOUSE_GOOD_DATA;
 294         }
 295
 296         del_timer(&priv->timer);
 297
 298         if (psmouse->packet[6] & 0x80) {
 299
 300                 /*
 301                  * Highest bit is set - that means we either had
 302                  * complete ALPS packet and this is start of the
 303                  * next packet or we got garbage.
 304                  */
 305
 306                 if (((psmouse->packet[3] |
 307                       psmouse->packet[4] |
 308                       psmouse->packet[5]) & 0x80) ||
 309                     (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
 310                         dbg("refusing packet %x %x %x %x "
 311                             "(suspected interleaved ps/2)\n",
 312                             psmouse->packet[3], psmouse->packet[4],
 313                             psmouse->packet[5], psmouse->packet[6]);
 314                         return PSMOUSE_BAD_DATA;
 315                 }
 316
 317                 alps_process_packet(psmouse);
 318
 319                 /* Continue with the next packet */
 320                 psmouse->packet[0] = psmouse->packet[6];
 321                 psmouse->pktcnt = 1;
 322
 323         } else {
 324
 325                 /*
 326                  * High bit is 0 - that means that we indeed got a PS/2
 327                  * packet in the middle of ALPS packet.
 328                  *
 329                  * There is also possibility that we got 6-byte ALPS
 330                  * packet followed  by 3-byte packet from trackpoint. We
 331                  * can not distinguish between these 2 scenarios but
 332                  * becase the latter is unlikely to happen in course of
 333                  * normal operation (user would need to press all
 334                  * buttons on the pad and start moving trackpoint
 335                  * without touching the pad surface) we assume former.
 336                  * Even if we are wrong the wost thing that would happen
 337                  * the cursor would jump but we should not get protocol
 338                  * desynchronization.
 339                  */
 340
 341                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
 342                                             false);
 343
 344                 /*
 345                  * Continue with the standard ALPS protocol handling,
 346                  * but make sure we won't process it as an interleaved
 347                  * packet again, which may happen if all buttons are
 348                  * pressed. To avoid this let's reset the 4th bit which
 349                  * is normally 1.
 350                  */
 351                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
 352                 psmouse->pktcnt = 4;
 353         }
 354
 355         return PSMOUSE_GOOD_DATA;
 356 }
 357
 358 static void alps_flush_packet(unsigned long data)
 359 {
 360         struct psmouse *psmouse = (struct psmouse *)data;
 361
 362         serio_pause_rx(psmouse->ps2dev.serio);
 363
 364         if (psmouse->pktcnt == 6) {
 365
 366                 /*
 367                  * We did not any more data in reasonable amount of time.
 368                  * Validate the last 3 bytes and process as a standard
 369                  * ALPS packet.
 370                  */
 371                 if ((psmouse->packet[3] |
 372                      psmouse->packet[4] |
 373                      psmouse->packet[5]) & 0x80) {
 374                         dbg("refusing packet %x %x %x "
 375                             "(suspected interleaved ps/2)\n",
 376                             psmouse->packet[3], psmouse->packet[4],
 377                             psmouse->packet[5]);
 378                 } else {
 379                         alps_process_packet(psmouse);
 380                 }
 381                 psmouse->pktcnt = 0;
 382         }
 383
 384         serio_continue_rx(psmouse->ps2dev.serio);
 385 }
 386
 387 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 388 {
 389         struct alps_data *priv = psmouse->private;
 390         const struct alps_model_info *model = priv->i;
 391
 392         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 393                 if (psmouse->pktcnt == 3) {
 394                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
 395                                                     true);
 396                         return PSMOUSE_FULL_PACKET;
 397                 }
 398                 return PSMOUSE_GOOD_DATA;
 399         }
 400
 401         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
 402
 403         if ((model->flags & ALPS_PS2_INTERLEAVED) &&
 404             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
 405                 return alps_handle_interleaved_ps2(psmouse);
 406         }
 407
 408         if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
 409                 dbg("refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
 410                     psmouse->packet[0], model->mask0, model->byte0);
 411                 return PSMOUSE_BAD_DATA;
 412         }
 413
 414         /* Bytes 2 - 6 should have 0 in the highest bit */
 415         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 416             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
 417                 dbg("refusing packet[%i] = %x\n",
 418                     psmouse->pktcnt - 1, psmouse->packet[psmouse->pktcnt - 1]);
 419                 return PSMOUSE_BAD_DATA;
 420         }
 421
 422         if (psmouse->pktcnt == 6) {
 423                 alps_process_packet(psmouse);
 424                 return PSMOUSE_FULL_PACKET;
 425         }
 426
 427         return PSMOUSE_GOOD_DATA;
 428 }
 429
 430 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 431 {
 432         struct ps2dev *ps2dev = &psmouse->ps2dev;
 433         static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 434         unsigned char param[4];
 435         int i;
 436
 437         /*
 438          * First try "E6 report".
 439          * ALPS should return 0,0,10 or 0,0,100
 440          */
 441         param[0] = 0;
 442         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 443             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 444             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 445             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 446                 return NULL;
 447
 448         param[0] = param[1] = param[2] = 0xff;
 449         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 450                 return NULL;
 451
 452         dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 453
 454         if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 455                 return NULL;
 456
 457         /*
 458          * Now try "E7 report". Allowed responses are in
 459          * alps_model_data[].signature
 460          */
 461         param[0] = 0;
 462         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 463             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 464             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 465             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 466                 return NULL;
 467
 468         param[0] = param[1] = param[2] = 0xff;
 469         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 470                 return NULL;
 471
 472         dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 473
 474         if (version) {
 475                 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
 476                         /* empty */;
 477                 *version = (param[0] << 8) | (param[1] << 4) | i;
 478         }
 479
 480         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 481                 if (!memcmp(param, alps_model_data[i].signature,
 482                             sizeof(alps_model_data[i].signature)))
 483                         return alps_model_data + i;
 484
 485         return NULL;
 486 }
 487
 488 /*
 489  * For DualPoint devices select the device that should respond to
 490  * subsequent commands. It looks like glidepad is behind stickpointer,
 491  * I'd thought it would be other way around...
 492  */
 493 static int alps_passthrough_mode(struct psmouse *psmouse, bool enable)
 494 {
 495         struct ps2dev *ps2dev = &psmouse->ps2dev;
 496         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
 497
 498         if (ps2_command(ps2dev, NULL, cmd) ||
 499             ps2_command(ps2dev, NULL, cmd) ||
 500             ps2_command(ps2dev, NULL, cmd) ||
 501             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 502                 return -1;
 503
 504         /* we may get 3 more bytes, just ignore them */
 505         ps2_drain(ps2dev, 3, 100);
 506
 507         return 0;
 508 }
 509
 510 static int alps_absolute_mode(struct psmouse *psmouse)
 511 {
 512         struct ps2dev *ps2dev = &psmouse->ps2dev;
 513
 514         /* Try ALPS magic knock - 4 disable before enable */
 515         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 516             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 517             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 518             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 519             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 520                 return -1;
 521
 522         /*
 523          * Switch mouse to poll (remote) mode so motion data will not
 524          * get in our way
 525          */
 526         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 527 }
 528
 529 static int alps_get_status(struct psmouse *psmouse, char *param)
 530 {
 531         struct ps2dev *ps2dev = &psmouse->ps2dev;
 532
 533         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
 534         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 535             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 536             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 537             ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 538                 return -1;
 539
 540         dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 541
 542         return 0;
 543 }
 544
 545 /*
 546  * Turn touchpad tapping on or off. The sequences are:
 547  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 548  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 549  * My guess that 0xE9 (GetInfo) is here as a sync point.
 550  * For models that also have stickpointer (DualPoints) its tapping
 551  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 552  * we don't fiddle with it.
 553  */
 554 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 555 {
 556         struct ps2dev *ps2dev = &psmouse->ps2dev;
 557         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 558         unsigned char tap_arg = enable ? 0x0A : 0x00;
 559         unsigned char param[4];
 560
 561         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 562             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 563             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 564             ps2_command(ps2dev, &tap_arg, cmd))
 565                 return -1;
 566
 567         if (alps_get_status(psmouse, param))
 568                 return -1;
 569
 570         return 0;
 571 }
 572
 573 /*
 574  * alps_poll() - poll the touchpad for current motion packet.
 575  * Used in resync.
 576  */
 577 static int alps_poll(struct psmouse *psmouse)
 578 {
 579         struct alps_data *priv = psmouse->private;
 580         unsigned char buf[6];
 581         bool poll_failed;
 582
 583         if (priv->i->flags & ALPS_PASS)
 584                 alps_passthrough_mode(psmouse, true);
 585
 586         poll_failed = ps2_command(&psmouse->ps2dev, buf,
 587                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
 588
 589         if (priv->i->flags & ALPS_PASS)
 590                 alps_passthrough_mode(psmouse, false);
 591
 592         if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
 593                 return -1;
 594
 595         if ((psmouse->badbyte & 0xc8) == 0x08) {
 596 /*
 597  * Poll the track stick ...
 598  */
 599                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
 600                         return -1;
 601         }
 602
 603         memcpy(psmouse->packet, buf, sizeof(buf));
 604         return 0;
 605 }
 606
 607 static int alps_hw_init(struct psmouse *psmouse)
 608 {
 609         struct alps_data *priv = psmouse->private;
 610         const struct alps_model_info *model = priv->i;
 611
 612         if ((model->flags & ALPS_PASS) &&
 613             alps_passthrough_mode(psmouse, true)) {
 614                 return -1;
 615         }
 616
 617         if (alps_tap_mode(psmouse, true)) {
 618                 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 619                 return -1;
 620         }
 621
 622         if (alps_absolute_mode(psmouse)) {
 623                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 624                 return -1;
 625         }
 626
 627         if ((model->flags & ALPS_PASS) &&
 628             alps_passthrough_mode(psmouse, false)) {
 629                 return -1;
 630         }
 631
 632         /* ALPS needs stream mode, otherwise it won't report any data */
 633         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
 634                 printk(KERN_ERR "alps.c: Failed to enable stream mode\n");
 635                 return -1;
 636         }
 637
 638         return 0;
 639 }
 640
 641 static int alps_reconnect(struct psmouse *psmouse)
 642 {
 643         const struct alps_model_info *model;
 644
 645         psmouse_reset(psmouse);
 646
 647         model = alps_get_model(psmouse, NULL);
 648         if (!model)
 649                 return -1;
 650
 651         return alps_hw_init(psmouse);
 652 }
 653
 654 static void alps_disconnect(struct psmouse *psmouse)
 655 {
 656         struct alps_data *priv = psmouse->private;
 657
 658         psmouse_reset(psmouse);
 659         del_timer_sync(&priv->timer);
 660         input_unregister_device(priv->dev2);
 661         kfree(priv);
 662 }
 663
 664 int alps_init(struct psmouse *psmouse)
 665 {
 666         struct alps_data *priv;
 667         const struct alps_model_info *model;
 668         struct input_dev *dev1 = psmouse->dev, *dev2;
 669         int version;
 670
 671         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
 672         dev2 = input_allocate_device();
 673         if (!priv || !dev2)
 674                 goto init_fail;
 675
 676         priv->dev2 = dev2;
 677         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
 678
 679         psmouse->private = priv;
 680
 681         model = alps_get_model(psmouse, &version);
 682         if (!model)
 683                 goto init_fail;
 684
 685         priv->i = model;
 686
 687         if (alps_hw_init(psmouse))
 688                 goto init_fail;
 689
 690         /*
 691          * Undo part of setup done for us by psmouse core since touchpad
 692          * is not a relative device.
 693          */
 694         __clear_bit(EV_REL, dev1->evbit);
 695         __clear_bit(REL_X, dev1->relbit);
 696         __clear_bit(REL_Y, dev1->relbit);
 697
 698         /*
 699          * Now set up our capabilities.
 700          */
 701         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
 702         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
 703         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
 704         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
 705                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
 706
 707         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
 708         input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
 709         input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
 710         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
 711
 712         if (model->flags & ALPS_WHEEL) {
 713                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
 714                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
 715         }
 716
 717         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 718                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
 719                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
 720         }
 721
 722         if (model->flags & ALPS_FOUR_BUTTONS) {
 723                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
 724                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
 725                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
 726                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
 727         } else {
 728                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
 729         }
 730
 731         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
 732         dev2->phys = priv->phys;
 733         dev2->name = (model->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 734         dev2->id.bustype = BUS_I8042;
 735         dev2->id.vendor  = 0x0002;
 736         dev2->id.product = PSMOUSE_ALPS;
 737         dev2->id.version = 0x0000;
 738         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
 739
 740         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 741         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 742         dev2->keybit[BIT_WORD(BTN_LEFT)] =
 743                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 744
 745         if (input_register_device(priv->dev2))
 746                 goto init_fail;
 747
 748         psmouse->protocol_handler = alps_process_byte;
 749         psmouse->poll = alps_poll;
 750         psmouse->disconnect = alps_disconnect;
 751         psmouse->reconnect = alps_reconnect;
 752         psmouse->pktsize = 6;
 753
 754         /* We are having trouble resyncing ALPS touchpads so disable it for now */
 755         psmouse->resync_time = 0;
 756
 757         return 0;
 758
 759 init_fail:
 760         psmouse_reset(psmouse);
 761         input_free_device(dev2);
 762         kfree(priv);
 763         psmouse->private = NULL;
 764         return -1;
 765 }
 766
 767 int alps_detect(struct psmouse *psmouse, bool set_properties)
 768 {
 769         int version;
 770         const struct alps_model_info *model;
 771
 772         model = alps_get_model(psmouse, &version);
 773         if (!model)
 774                 return -1;
 775
 776         if (set_properties) {
 777                 psmouse->vendor = "ALPS";
 778                 psmouse->name = model->flags & ALPS_DUALPOINT ?
 779                                 "DualPoint TouchPad" : "GlidePoint";
 780                 psmouse->model = version;
 781         }
 782         return 0;
 783 }
 784