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