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         { { 0x73, 0x02, 0x64 }, 0xf8, 0xf8, 0 },                          /* HP Pavilion dm3 */
  68         { { 0x52, 0x01, 0x14 }, 0xff, 0xff,
  69                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },      /* Toshiba Tecra A11-11L */
  70 };
  71
  72 /*
  73  * XXX - this entry is suspicious. First byte has zero lower nibble,
  74  * which is what a normal mouse would report. Also, the value 0x0e
  75  * isn't valid per PS/2 spec.
  76  */
  77
  78 /*
  79  * PS/2 packet format
  80  *
  81  * byte 0:  0    0 YSGN XSGN    1    M    R    L
  82  * byte 1: X7   X6   X5   X4   X3   X2   X1   X0
  83  * byte 2: Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
  84  *
  85  * Note that the device never signals overflow condition.
  86  *
  87  * ALPS absolute Mode - new format
  88  *
  89  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  90  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
  91  * byte 2:  0  x10   x9   x8   x7    ?  fin  ges
  92  * byte 3:  0   y9   y8   y7    1    M    R    L
  93  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  94  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  95  *
  96  * Dualpoint device -- interleaved packet format
  97  *
  98  * byte 0:    1    1    0    0    1    1    1    1
  99  * byte 1:    0   x6   x5   x4   x3   x2   x1   x0
 100  * byte 2:    0  x10   x9   x8   x7    0  fin  ges
 101  * byte 3:    0    0 YSGN XSGN    1    1    1    1
 102  * byte 4:   X7   X6   X5   X4   X3   X2   X1   X0
 103  * byte 5:   Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
 104  * byte 6:    0   y9   y8   y7    1    m    r    l
 105  * byte 7:    0   y6   y5   y4   y3   y2   y1   y0
 106  * byte 8:    0   z6   z5   z4   z3   z2   z1   z0
 107  *
 108  * CAPITALS = stick, miniscules = touchpad
 109  *
 110  * ?'s can have different meanings on different models,
 111  * such as wheel rotation, extra buttons, stick buttons
 112  * on a dualpoint, etc.
 113  */
 114
 115 static bool alps_is_valid_first_byte(const struct alps_model_info *model,
 116                                      unsigned char data)
 117 {
 118         return (data & model->mask0) == model->byte0;
 119 }
 120
 121 static void alps_report_buttons(struct psmouse *psmouse,
 122                                 struct input_dev *dev1, struct input_dev *dev2,
 123                                 int left, int right, int middle)
 124 {
 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 }
 147
 148 static void alps_process_packet(struct psmouse *psmouse)
 149 {
 150         struct alps_data *priv = psmouse->private;
 151         const struct alps_model_info *model = priv->i;
 152         unsigned char *packet = psmouse->packet;
 153         struct input_dev *dev = psmouse->dev;
 154         struct input_dev *dev2 = priv->dev2;
 155         int x, y, z, ges, fin, left, right, middle;
 156         int back = 0, forward = 0;
 157
 158         if (model->flags & ALPS_OLDPROTO) {
 159                 left = packet[2] & 0x10;
 160                 right = packet[2] & 0x08;
 161                 middle = 0;
 162                 x = packet[1] | ((packet[0] & 0x07) << 7);
 163                 y = packet[4] | ((packet[3] & 0x07) << 7);
 164                 z = packet[5];
 165         } else {
 166                 left = packet[3] & 1;
 167                 right = packet[3] & 2;
 168                 middle = packet[3] & 4;
 169                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 170                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 171                 z = packet[5];
 172         }
 173
 174         if (model->flags & ALPS_FW_BK_1) {
 175                 back = packet[0] & 0x10;
 176                 forward = packet[2] & 4;
 177         }
 178
 179         if (model->flags & ALPS_FW_BK_2) {
 180                 back = packet[3] & 4;
 181                 forward = packet[2] & 4;
 182                 if ((middle = forward && back))
 183                         forward = back = 0;
 184         }
 185
 186         ges = packet[2] & 1;
 187         fin = packet[2] & 2;
 188
 189         if ((model->flags & ALPS_DUALPOINT) && z == 127) {
 190                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 191                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 192
 193                 alps_report_buttons(psmouse, dev2, dev, left, right, middle);
 194
 195                 input_sync(dev2);
 196                 return;
 197         }
 198
 199         alps_report_buttons(psmouse, dev, dev2, left, right, middle);
 200
 201         /* Convert hardware tap to a reasonable Z value */
 202         if (ges && !fin)
 203                 z = 40;
 204
 205         /*
 206          * A "tap and drag" operation is reported by the hardware as a transition
 207          * from (!fin && ges) to (fin && ges). This should be translated to the
 208          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 209          */
 210         if (ges && fin && !priv->prev_fin) {
 211                 input_report_abs(dev, ABS_X, x);
 212                 input_report_abs(dev, ABS_Y, y);
 213                 input_report_abs(dev, ABS_PRESSURE, 0);
 214                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 215                 input_sync(dev);
 216         }
 217         priv->prev_fin = fin;
 218
 219         if (z > 30)
 220                 input_report_key(dev, BTN_TOUCH, 1);
 221         if (z < 25)
 222                 input_report_key(dev, BTN_TOUCH, 0);
 223
 224         if (z > 0) {
 225                 input_report_abs(dev, ABS_X, x);
 226                 input_report_abs(dev, ABS_Y, y);
 227         }
 228
 229         input_report_abs(dev, ABS_PRESSURE, z);
 230         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 231
 232         if (model->flags & ALPS_WHEEL)
 233                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 234
 235         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 236                 input_report_key(dev, BTN_FORWARD, forward);
 237                 input_report_key(dev, BTN_BACK, back);
 238         }
 239
 240         if (model->flags & ALPS_FOUR_BUTTONS) {
 241                 input_report_key(dev, BTN_0, packet[2] & 4);
 242                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 243                 input_report_key(dev, BTN_2, packet[3] & 4);
 244                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 245         }
 246
 247         input_sync(dev);
 248 }
 249
 250 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 251                                         unsigned char packet[],
 252                                         bool report_buttons)
 253 {
 254         struct alps_data *priv = psmouse->private;
 255         struct input_dev *dev2 = priv->dev2;
 256
 257         if (report_buttons)
 258                 alps_report_buttons(psmouse, dev2, psmouse->dev,
 259                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
 260
 261         input_report_rel(dev2, REL_X,
 262                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
 263         input_report_rel(dev2, REL_Y,
 264                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
 265
 266         input_sync(dev2);
 267 }
 268
 269 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 270 {
 271         struct alps_data *priv = psmouse->private;
 272
 273         if (psmouse->pktcnt < 6)
 274                 return PSMOUSE_GOOD_DATA;
 275
 276         if (psmouse->pktcnt == 6) {
 277                 /*
 278                  * Start a timer to flush the packet if it ends up last
 279                  * 6-byte packet in the stream. Timer needs to fire
 280                  * psmouse core times out itself. 20 ms should be enough
 281                  * to decide if we are getting more data or not.
 282                  */
 283                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
 284                 return PSMOUSE_GOOD_DATA;
 285         }
 286
 287         del_timer(&priv->timer);
 288
 289         if (psmouse->packet[6] & 0x80) {
 290
 291                 /*
 292                  * Highest bit is set - that means we either had
 293                  * complete ALPS packet and this is start of the
 294                  * next packet or we got garbage.
 295                  */
 296
 297                 if (((psmouse->packet[3] |
 298                       psmouse->packet[4] |
 299                       psmouse->packet[5]) & 0x80) ||
 300                     (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
 301                         dbg("refusing packet %x %x %x %x "
 302                             "(suspected interleaved ps/2)\n",
 303                             psmouse->packet[3], psmouse->packet[4],
 304                             psmouse->packet[5], psmouse->packet[6]);
 305                         return PSMOUSE_BAD_DATA;
 306                 }
 307
 308                 alps_process_packet(psmouse);
 309
 310                 /* Continue with the next packet */
 311                 psmouse->packet[0] = psmouse->packet[6];
 312                 psmouse->pktcnt = 1;
 313
 314         } else {
 315
 316                 /*
 317                  * High bit is 0 - that means that we indeed got a PS/2
 318                  * packet in the middle of ALPS packet.
 319                  *
 320                  * There is also possibility that we got 6-byte ALPS
 321                  * packet followed  by 3-byte packet from trackpoint. We
 322                  * can not distinguish between these 2 scenarios but
 323                  * becase the latter is unlikely to happen in course of
 324                  * normal operation (user would need to press all
 325                  * buttons on the pad and start moving trackpoint
 326                  * without touching the pad surface) we assume former.
 327                  * Even if we are wrong the wost thing that would happen
 328                  * the cursor would jump but we should not get protocol
 329                  * desynchronization.
 330                  */
 331
 332                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
 333                                             false);
 334
 335                 /*
 336                  * Continue with the standard ALPS protocol handling,
 337                  * but make sure we won't process it as an interleaved
 338                  * packet again, which may happen if all buttons are
 339                  * pressed. To avoid this let's reset the 4th bit which
 340                  * is normally 1.
 341                  */
 342                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
 343                 psmouse->pktcnt = 4;
 344         }
 345
 346         return PSMOUSE_GOOD_DATA;
 347 }
 348
 349 static void alps_flush_packet(unsigned long data)
 350 {
 351         struct psmouse *psmouse = (struct psmouse *)data;
 352
 353         serio_pause_rx(psmouse->ps2dev.serio);
 354
 355         if (psmouse->pktcnt == 6) {
 356
 357                 /*
 358                  * We did not any more data in reasonable amount of time.
 359                  * Validate the last 3 bytes and process as a standard
 360                  * ALPS packet.
 361                  */
 362                 if ((psmouse->packet[3] |
 363                      psmouse->packet[4] |
 364                      psmouse->packet[5]) & 0x80) {
 365                         dbg("refusing packet %x %x %x "
 366                             "(suspected interleaved ps/2)\n",
 367                             psmouse->packet[3], psmouse->packet[4],
 368                             psmouse->packet[5]);
 369                 } else {
 370                         alps_process_packet(psmouse);
 371                 }
 372                 psmouse->pktcnt = 0;
 373         }
 374
 375         serio_continue_rx(psmouse->ps2dev.serio);
 376 }
 377
 378 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 379 {
 380         struct alps_data *priv = psmouse->private;
 381         const struct alps_model_info *model = priv->i;
 382
 383         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 384                 if (psmouse->pktcnt == 3) {
 385                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
 386                                                     true);
 387                         return PSMOUSE_FULL_PACKET;
 388                 }
 389                 return PSMOUSE_GOOD_DATA;
 390         }
 391
 392         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
 393
 394         if ((model->flags & ALPS_PS2_INTERLEAVED) &&
 395             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
 396                 return alps_handle_interleaved_ps2(psmouse);
 397         }
 398
 399         if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
 400                 dbg("refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
 401                     psmouse->packet[0], model->mask0, model->byte0);
 402                 return PSMOUSE_BAD_DATA;
 403         }
 404
 405         /* Bytes 2 - 6 should have 0 in the highest bit */
 406         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 407             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
 408                 dbg("refusing packet[%i] = %x\n",
 409                     psmouse->pktcnt - 1, psmouse->packet[psmouse->pktcnt - 1]);
 410                 return PSMOUSE_BAD_DATA;
 411         }
 412
 413         if (psmouse->pktcnt == 6) {
 414                 alps_process_packet(psmouse);
 415                 return PSMOUSE_FULL_PACKET;
 416         }
 417
 418         return PSMOUSE_GOOD_DATA;
 419 }
 420
 421 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 422 {
 423         struct ps2dev *ps2dev = &psmouse->ps2dev;
 424         static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 425         unsigned char param[4];
 426         int i;
 427
 428         /*
 429          * First try "E6 report".
 430          * ALPS should return 0,0,10 or 0,0,100
 431          */
 432         param[0] = 0;
 433         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 434             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 435             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 436             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 437                 return NULL;
 438
 439         param[0] = param[1] = param[2] = 0xff;
 440         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 441                 return NULL;
 442
 443         dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 444
 445         if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 446                 return NULL;
 447
 448         /*
 449          * Now try "E7 report". Allowed responses are in
 450          * alps_model_data[].signature
 451          */
 452         param[0] = 0;
 453         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 454             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 455             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 456             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 457                 return NULL;
 458
 459         param[0] = param[1] = param[2] = 0xff;
 460         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 461                 return NULL;
 462
 463         dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 464
 465         if (version) {
 466                 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
 467                         /* empty */;
 468                 *version = (param[0] << 8) | (param[1] << 4) | i;
 469         }
 470
 471         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 472                 if (!memcmp(param, alps_model_data[i].signature,
 473                             sizeof(alps_model_data[i].signature)))
 474                         return alps_model_data + i;
 475
 476         return NULL;
 477 }
 478
 479 /*
 480  * For DualPoint devices select the device that should respond to
 481  * subsequent commands. It looks like glidepad is behind stickpointer,
 482  * I'd thought it would be other way around...
 483  */
 484 static int alps_passthrough_mode(struct psmouse *psmouse, bool enable)
 485 {
 486         struct ps2dev *ps2dev = &psmouse->ps2dev;
 487         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
 488
 489         if (ps2_command(ps2dev, NULL, cmd) ||
 490             ps2_command(ps2dev, NULL, cmd) ||
 491             ps2_command(ps2dev, NULL, cmd) ||
 492             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 493                 return -1;
 494
 495         /* we may get 3 more bytes, just ignore them */
 496         ps2_drain(ps2dev, 3, 100);
 497
 498         return 0;
 499 }
 500
 501 static int alps_absolute_mode(struct psmouse *psmouse)
 502 {
 503         struct ps2dev *ps2dev = &psmouse->ps2dev;
 504
 505         /* Try ALPS magic knock - 4 disable before enable */
 506         if (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_DISABLE) ||
 510             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 511                 return -1;
 512
 513         /*
 514          * Switch mouse to poll (remote) mode so motion data will not
 515          * get in our way
 516          */
 517         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 518 }
 519
 520 static int alps_get_status(struct psmouse *psmouse, char *param)
 521 {
 522         struct ps2dev *ps2dev = &psmouse->ps2dev;
 523
 524         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
 525         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 526             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 527             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 528             ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 529                 return -1;
 530
 531         dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 532
 533         return 0;
 534 }
 535
 536 /*
 537  * Turn touchpad tapping on or off. The sequences are:
 538  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 539  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 540  * My guess that 0xE9 (GetInfo) is here as a sync point.
 541  * For models that also have stickpointer (DualPoints) its tapping
 542  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 543  * we don't fiddle with it.
 544  */
 545 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 546 {
 547         struct ps2dev *ps2dev = &psmouse->ps2dev;
 548         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 549         unsigned char tap_arg = enable ? 0x0A : 0x00;
 550         unsigned char param[4];
 551
 552         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 553             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 554             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 555             ps2_command(ps2dev, &tap_arg, cmd))
 556                 return -1;
 557
 558         if (alps_get_status(psmouse, param))
 559                 return -1;
 560
 561         return 0;
 562 }
 563
 564 /*
 565  * alps_poll() - poll the touchpad for current motion packet.
 566  * Used in resync.
 567  */
 568 static int alps_poll(struct psmouse *psmouse)
 569 {
 570         struct alps_data *priv = psmouse->private;
 571         unsigned char buf[6];
 572         bool poll_failed;
 573
 574         if (priv->i->flags & ALPS_PASS)
 575                 alps_passthrough_mode(psmouse, true);
 576
 577         poll_failed = ps2_command(&psmouse->ps2dev, buf,
 578                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
 579
 580         if (priv->i->flags & ALPS_PASS)
 581                 alps_passthrough_mode(psmouse, false);
 582
 583         if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
 584                 return -1;
 585
 586         if ((psmouse->badbyte & 0xc8) == 0x08) {
 587 /*
 588  * Poll the track stick ...
 589  */
 590                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
 591                         return -1;
 592         }
 593
 594         memcpy(psmouse->packet, buf, sizeof(buf));
 595         return 0;
 596 }
 597
 598 static int alps_hw_init(struct psmouse *psmouse)
 599 {
 600         struct alps_data *priv = psmouse->private;
 601         const struct alps_model_info *model = priv->i;
 602
 603         if ((model->flags & ALPS_PASS) &&
 604             alps_passthrough_mode(psmouse, true)) {
 605                 return -1;
 606         }
 607
 608         if (alps_tap_mode(psmouse, true)) {
 609                 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 610                 return -1;
 611         }
 612
 613         if (alps_absolute_mode(psmouse)) {
 614                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 615                 return -1;
 616         }
 617
 618         if ((model->flags & ALPS_PASS) &&
 619             alps_passthrough_mode(psmouse, false)) {
 620                 return -1;
 621         }
 622
 623         /* ALPS needs stream mode, otherwise it won't report any data */
 624         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
 625                 printk(KERN_ERR "alps.c: Failed to enable stream mode\n");
 626                 return -1;
 627         }
 628
 629         return 0;
 630 }
 631
 632 static int alps_reconnect(struct psmouse *psmouse)
 633 {
 634         const struct alps_model_info *model;
 635
 636         psmouse_reset(psmouse);
 637
 638         model = alps_get_model(psmouse, NULL);
 639         if (!model)
 640                 return -1;
 641
 642         return alps_hw_init(psmouse);
 643 }
 644
 645 static void alps_disconnect(struct psmouse *psmouse)
 646 {
 647         struct alps_data *priv = psmouse->private;
 648
 649         psmouse_reset(psmouse);
 650         del_timer_sync(&priv->timer);
 651         input_unregister_device(priv->dev2);
 652         kfree(priv);
 653 }
 654
 655 int alps_init(struct psmouse *psmouse)
 656 {
 657         struct alps_data *priv;
 658         const struct alps_model_info *model;
 659         struct input_dev *dev1 = psmouse->dev, *dev2;
 660         int version;
 661
 662         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
 663         dev2 = input_allocate_device();
 664         if (!priv || !dev2)
 665                 goto init_fail;
 666
 667         priv->dev2 = dev2;
 668         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
 669
 670         psmouse->private = priv;
 671
 672         model = alps_get_model(psmouse, &version);
 673         if (!model)
 674                 goto init_fail;
 675
 676         priv->i = model;
 677
 678         if (alps_hw_init(psmouse))
 679                 goto init_fail;
 680
 681         /*
 682          * Undo part of setup done for us by psmouse core since touchpad
 683          * is not a relative device.
 684          */
 685         __clear_bit(EV_REL, dev1->evbit);
 686         __clear_bit(REL_X, dev1->relbit);
 687         __clear_bit(REL_Y, dev1->relbit);
 688
 689         /*
 690          * Now set up our capabilities.
 691          */
 692         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
 693         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
 694         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
 695         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
 696                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
 697
 698         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
 699         input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
 700         input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
 701         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
 702
 703         if (model->flags & ALPS_WHEEL) {
 704                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
 705                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
 706         }
 707
 708         if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 709                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
 710                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
 711         }
 712
 713         if (model->flags & ALPS_FOUR_BUTTONS) {
 714                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
 715                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
 716                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
 717                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
 718         } else {
 719                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
 720         }
 721
 722         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
 723         dev2->phys = priv->phys;
 724         dev2->name = (model->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 725         dev2->id.bustype = BUS_I8042;
 726         dev2->id.vendor  = 0x0002;
 727         dev2->id.product = PSMOUSE_ALPS;
 728         dev2->id.version = 0x0000;
 729         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
 730
 731         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 732         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 733         dev2->keybit[BIT_WORD(BTN_LEFT)] =
 734                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 735
 736         if (input_register_device(priv->dev2))
 737                 goto init_fail;
 738
 739         psmouse->protocol_handler = alps_process_byte;
 740         psmouse->poll = alps_poll;
 741         psmouse->disconnect = alps_disconnect;
 742         psmouse->reconnect = alps_reconnect;
 743         psmouse->pktsize = 6;
 744
 745         /* We are having trouble resyncing ALPS touchpads so disable it for now */
 746         psmouse->resync_time = 0;
 747
 748         return 0;
 749
 750 init_fail:
 751         psmouse_reset(psmouse);
 752         input_free_device(dev2);
 753         kfree(priv);
 754         psmouse->private = NULL;
 755         return -1;
 756 }
 757
 758 int alps_detect(struct psmouse *psmouse, bool set_properties)
 759 {
 760         int version;
 761         const struct alps_model_info *model;
 762
 763         model = alps_get_model(psmouse, &version);
 764         if (!model)
 765                 return -1;
 766
 767         if (set_properties) {
 768                 psmouse->vendor = "ALPS";
 769                 psmouse->name = model->flags & ALPS_DUALPOINT ?
 770                                 "DualPoint TouchPad" : "GlidePoint";
 771                 psmouse->model = version;
 772         }
 773         return 0;
 774 }
 775