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/input/mt.h>
  21 #include <linux/serio.h>
  22 #include <linux/libps2.h>
  23
  24 #include "psmouse.h"
  25 #include "alps.h"
  26
  27 /*
  28  * Definitions for ALPS version 3 and 4 command mode protocol
  29  */
  30 #define ALPS_CMD_NIBBLE_10      0x01f2
  31
  32 #define ALPS_REG_BASE_RUSHMORE  0xc2c0
  33 #define ALPS_REG_BASE_PINNACLE  0x0000
  34
  35 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
  36         { PSMOUSE_CMD_SETPOLL,          0x00 }, /* 0 */
  37         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
  38         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
  39         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
  40         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
  41         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
  42         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
  43         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
  44         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
  45         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
  46         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
  47         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
  48         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
  49         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
  50         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
  51         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  52 };
  53
  54 static const struct alps_nibble_commands alps_v4_nibble_commands[] = {
  55         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
  56         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
  57         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
  58         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
  59         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
  60         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
  61         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
  62         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
  63         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
  64         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
  65         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
  66         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
  67         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
  68         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
  69         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
  70         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  71 };
  72
  73
  74 #define ALPS_DUALPOINT          0x02    /* touchpad has trackstick */
  75 #define ALPS_PASS               0x04    /* device has a pass-through port */
  76
  77 #define ALPS_WHEEL              0x08    /* hardware wheel present */
  78 #define ALPS_FW_BK_1            0x10    /* front & back buttons present */
  79 #define ALPS_FW_BK_2            0x20    /* front & back buttons present */
  80 #define ALPS_FOUR_BUTTONS       0x40    /* 4 direction button present */
  81 #define ALPS_PS2_INTERLEAVED    0x80    /* 3-byte PS/2 packet interleaved with
  82                                            6-byte ALPS packet */
  83
  84 static const struct alps_model_info alps_model_data[] = {
  85         { { 0x32, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },  /* Toshiba Salellite Pro M10 */
  86         { { 0x33, 0x02, 0x0a }, 0x00, ALPS_PROTO_V1, 0x88, 0xf8, 0 },                           /* UMAX-530T */
  87         { { 0x53, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
  88         { { 0x53, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
  89         { { 0x60, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },                           /* HP ze1115 */
  90         { { 0x63, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
  91         { { 0x63, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
  92         { { 0x63, 0x02, 0x28 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 },                /* Fujitsu Siemens S6010 */
  93         { { 0x63, 0x02, 0x3c }, 0x00, ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL },                  /* Toshiba Satellite S2400-103 */
  94         { { 0x63, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 },                /* NEC Versa L320 */
  95         { { 0x63, 0x02, 0x64 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
  96         { { 0x63, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },  /* Dell Latitude D800 */
  97         { { 0x73, 0x00, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT },              /* ThinkPad R61 8918-5QG */
  98         { { 0x73, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
  99         { { 0x73, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 },                /* Ahtec Laptop */
 100         { { 0x20, 0x02, 0x0e }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },  /* XXX */
 101         { { 0x22, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
 102         { { 0x22, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT },  /* Dell Latitude D600 */
 103         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
 104         { { 0x62, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf,
 105                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
 106         { { 0x73, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS },           /* Dell Vostro 1400 */
 107         { { 0x52, 0x01, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff,
 108                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },                            /* Toshiba Tecra A11-11L */
 109         { { 0x73, 0x02, 0x64 }, 0x8a, ALPS_PROTO_V4, 0x8f, 0x8f, 0 },
 110 };
 111
 112 static void alps_set_abs_params_st(struct alps_data *priv,
 113                                    struct input_dev *dev1);
 114 static void alps_set_abs_params_mt(struct alps_data *priv,
 115                                    struct input_dev *dev1);
 116
 117 /*
 118  * XXX - this entry is suspicious. First byte has zero lower nibble,
 119  * which is what a normal mouse would report. Also, the value 0x0e
 120  * isn't valid per PS/2 spec.
 121  */
 122
 123 /* Packet formats are described in Documentation/input/alps.txt */
 124
 125 static bool alps_is_valid_first_byte(struct alps_data *priv,
 126                                      unsigned char data)
 127 {
 128         return (data & priv->mask0) == priv->byte0;
 129 }
 130
 131 static void alps_report_buttons(struct psmouse *psmouse,
 132                                 struct input_dev *dev1, struct input_dev *dev2,
 133                                 int left, int right, int middle)
 134 {
 135         struct input_dev *dev;
 136
 137         /*
 138          * If shared button has already been reported on the
 139          * other device (dev2) then this event should be also
 140          * sent through that device.
 141          */
 142         dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
 143         input_report_key(dev, BTN_LEFT, left);
 144
 145         dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
 146         input_report_key(dev, BTN_RIGHT, right);
 147
 148         dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
 149         input_report_key(dev, BTN_MIDDLE, middle);
 150
 151         /*
 152          * Sync the _other_ device now, we'll do the first
 153          * device later once we report the rest of the events.
 154          */
 155         input_sync(dev2);
 156 }
 157
 158 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
 159 {
 160         struct alps_data *priv = psmouse->private;
 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 (priv->proto_version == ALPS_PROTO_V1) {
 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 (priv->flags & ALPS_FW_BK_1) {
 184                 back = packet[0] & 0x10;
 185                 forward = packet[2] & 4;
 186         }
 187
 188         if (priv->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 ((priv->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 (priv->flags & ALPS_WHEEL)
 242                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 243
 244         if (priv->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 (priv->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 /*
 260  * Process bitmap data from v3 and v4 protocols. Returns the number of
 261  * fingers detected. A return value of 0 means at least one of the
 262  * bitmaps was empty.
 263  *
 264  * The bitmaps don't have enough data to track fingers, so this function
 265  * only generates points representing a bounding box of all contacts.
 266  * These points are returned in x1, y1, x2, and y2 when the return value
 267  * is greater than 0.
 268  */
 269 static int alps_process_bitmap(struct alps_data *priv,
 270                                unsigned int x_map, unsigned int y_map,
 271                                int *x1, int *y1, int *x2, int *y2)
 272 {
 273         struct alps_bitmap_point {
 274                 int start_bit;
 275                 int num_bits;
 276         };
 277
 278         int fingers_x = 0, fingers_y = 0, fingers;
 279         int i, bit, prev_bit;
 280         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 281         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 282         struct alps_bitmap_point *point;
 283
 284         if (!x_map || !y_map)
 285                 return 0;
 286
 287         *x1 = *y1 = *x2 = *y2 = 0;
 288
 289         prev_bit = 0;
 290         point = &x_low;
 291         for (i = 0; x_map != 0; i++, x_map >>= 1) {
 292                 bit = x_map & 1;
 293                 if (bit) {
 294                         if (!prev_bit) {
 295                                 point->start_bit = i;
 296                                 fingers_x++;
 297                         }
 298                         point->num_bits++;
 299                 } else {
 300                         if (prev_bit)
 301                                 point = &x_high;
 302                         else
 303                                 point->num_bits = 0;
 304                 }
 305                 prev_bit = bit;
 306         }
 307
 308         /*
 309          * y bitmap is reversed for what we need (lower positions are in
 310          * higher bits), so we process from the top end.
 311          */
 312         y_map = y_map << (sizeof(y_map) * BITS_PER_BYTE - priv->y_bits);
 313         prev_bit = 0;
 314         point = &y_low;
 315         for (i = 0; y_map != 0; i++, y_map <<= 1) {
 316                 bit = y_map & (1 << (sizeof(y_map) * BITS_PER_BYTE - 1));
 317                 if (bit) {
 318                         if (!prev_bit) {
 319                                 point->start_bit = i;
 320                                 fingers_y++;
 321                         }
 322                         point->num_bits++;
 323                 } else {
 324                         if (prev_bit)
 325                                 point = &y_high;
 326                         else
 327                                 point->num_bits = 0;
 328                 }
 329                 prev_bit = bit;
 330         }
 331
 332         /*
 333          * Fingers can overlap, so we use the maximum count of fingers
 334          * on either axis as the finger count.
 335          */
 336         fingers = max(fingers_x, fingers_y);
 337
 338         /*
 339          * If total fingers is > 1 but either axis reports only a single
 340          * contact, we have overlapping or adjacent fingers. For the
 341          * purposes of creating a bounding box, divide the single contact
 342          * (roughly) equally between the two points.
 343          */
 344         if (fingers > 1) {
 345                 if (fingers_x == 1) {
 346                         i = x_low.num_bits / 2;
 347                         x_low.num_bits = x_low.num_bits - i;
 348                         x_high.start_bit = x_low.start_bit + i;
 349                         x_high.num_bits = max(i, 1);
 350                 } else if (fingers_y == 1) {
 351                         i = y_low.num_bits / 2;
 352                         y_low.num_bits = y_low.num_bits - i;
 353                         y_high.start_bit = y_low.start_bit + i;
 354                         y_high.num_bits = max(i, 1);
 355                 }
 356         }
 357
 358         *x1 = (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 359               (2 * (priv->x_bits - 1));
 360         *y1 = (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 361               (2 * (priv->y_bits - 1));
 362
 363         if (fingers > 1) {
 364                 *x2 = (priv->x_max *
 365                        (2 * x_high.start_bit + x_high.num_bits - 1)) /
 366                       (2 * (priv->x_bits - 1));
 367                 *y2 = (priv->y_max *
 368                        (2 * y_high.start_bit + y_high.num_bits - 1)) /
 369                       (2 * (priv->y_bits - 1));
 370         }
 371
 372         return fingers;
 373 }
 374
 375 static void alps_set_slot(struct input_dev *dev, int slot, bool active,
 376                           int x, int y)
 377 {
 378         input_mt_slot(dev, slot);
 379         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 380         if (active) {
 381                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 382                 input_report_abs(dev, ABS_MT_POSITION_Y, y);
 383         }
 384 }
 385
 386 static void alps_report_semi_mt_data(struct input_dev *dev, int num_fingers,
 387                                      int x1, int y1, int x2, int y2)
 388 {
 389         alps_set_slot(dev, 0, num_fingers != 0, x1, y1);
 390         alps_set_slot(dev, 1, num_fingers == 2, x2, y2);
 391 }
 392
 393 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 394 {
 395         struct alps_data *priv = psmouse->private;
 396         unsigned char *packet = psmouse->packet;
 397         struct input_dev *dev = priv->dev2;
 398         int x, y, z, left, right, middle;
 399
 400         /* Sanity check packet */
 401         if (!(packet[0] & 0x40)) {
 402                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 403                 return;
 404         }
 405
 406         /*
 407          * There's a special packet that seems to indicate the end
 408          * of a stream of trackstick data. Filter these out.
 409          */
 410         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 411                 return;
 412
 413         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 414         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 415         z = (packet[4] & 0x7c) >> 2;
 416
 417         /*
 418          * The x and y values tend to be quite large, and when used
 419          * alone the trackstick is difficult to use. Scale them down
 420          * to compensate.
 421          */
 422         x /= 8;
 423         y /= 8;
 424
 425         input_report_rel(dev, REL_X, x);
 426         input_report_rel(dev, REL_Y, -y);
 427
 428         /*
 429          * Most ALPS models report the trackstick buttons in the touchpad
 430          * packets, but a few report them here. No reliable way has been
 431          * found to differentiate between the models upfront, so we enable
 432          * the quirk in response to seeing a button press in the trackstick
 433          * packet.
 434          */
 435         left = packet[3] & 0x01;
 436         right = packet[3] & 0x02;
 437         middle = packet[3] & 0x04;
 438
 439         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 440             (left || right || middle))
 441                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 442
 443         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 444                 input_report_key(dev, BTN_LEFT, left);
 445                 input_report_key(dev, BTN_RIGHT, right);
 446                 input_report_key(dev, BTN_MIDDLE, middle);
 447         }
 448
 449         input_sync(dev);
 450         return;
 451 }
 452
 453 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 454 {
 455         f->left = !!(p[3] & 0x01);
 456         f->right = !!(p[3] & 0x02);
 457         f->middle = !!(p[3] & 0x04);
 458
 459         f->ts_left = !!(p[3] & 0x10);
 460         f->ts_right = !!(p[3] & 0x20);
 461         f->ts_middle = !!(p[3] & 0x40);
 462 }
 463
 464 static void alps_decode_pinnacle(struct alps_fields *f, unsigned char *p)
 465 {
 466         f->first_mp = !!(p[4] & 0x40);
 467         f->is_mp = !!(p[0] & 0x40);
 468
 469         f->fingers = (p[5] & 0x3) + 1;
 470         f->x_map = ((p[4] & 0x7e) << 8) |
 471                    ((p[1] & 0x7f) << 2) |
 472                    ((p[0] & 0x30) >> 4);
 473         f->y_map = ((p[3] & 0x70) << 4) |
 474                    ((p[2] & 0x7f) << 1) |
 475                    (p[4] & 0x01);
 476
 477         f->x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 478                ((p[0] & 0x30) >> 4);
 479         f->y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 480         f->z = p[5] & 0x7f;
 481
 482         alps_decode_buttons_v3(f, p);
 483 }
 484
 485 static void alps_decode_rushmore(struct alps_fields *f, unsigned char *p)
 486 {
 487         alps_decode_pinnacle(f, p);
 488
 489         f->x_map |= (p[5] & 0x10) << 11;
 490         f->y_map |= (p[5] & 0x20) << 6;
 491 }
 492
 493 static void alps_process_touchpad_packet_v3(struct psmouse *psmouse)
 494 {
 495         struct alps_data *priv = psmouse->private;
 496         unsigned char *packet = psmouse->packet;
 497         struct input_dev *dev = psmouse->dev;
 498         struct input_dev *dev2 = priv->dev2;
 499         int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
 500         int fingers = 0, bmap_fingers;
 501         struct alps_fields f;
 502
 503         priv->decode_fields(&f, packet);
 504
 505         /*
 506          * There's no single feature of touchpad position and bitmap packets
 507          * that can be used to distinguish between them. We rely on the fact
 508          * that a bitmap packet should always follow a position packet with
 509          * bit 6 of packet[4] set.
 510          */
 511         if (priv->multi_packet) {
 512                 /*
 513                  * Sometimes a position packet will indicate a multi-packet
 514                  * sequence, but then what follows is another position
 515                  * packet. Check for this, and when it happens process the
 516                  * position packet as usual.
 517                  */
 518                 if (f.is_mp) {
 519                         fingers = f.fingers;
 520                         bmap_fingers = alps_process_bitmap(priv,
 521                                                            f.x_map, f.y_map,
 522                                                            &x1, &y1, &x2, &y2);
 523
 524                         /*
 525                          * We shouldn't report more than one finger if
 526                          * we don't have two coordinates.
 527                          */
 528                         if (fingers > 1 && bmap_fingers < 2)
 529                                 fingers = bmap_fingers;
 530
 531                         /* Now process position packet */
 532                         priv->decode_fields(&f, priv->multi_data);
 533                 } else {
 534                         priv->multi_packet = 0;
 535                 }
 536         }
 537
 538         /*
 539          * Bit 6 of byte 0 is not usually set in position packets. The only
 540          * times it seems to be set is in situations where the data is
 541          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 542          * this combined with the fact that this bit is useful for filtering
 543          * out misidentified bitmap packets, we reject anything with this
 544          * bit set.
 545          */
 546         if (f.is_mp)
 547                 return;
 548
 549         if (!priv->multi_packet && f.first_mp) {
 550                 priv->multi_packet = 1;
 551                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 552                 return;
 553         }
 554
 555         priv->multi_packet = 0;
 556
 557         /*
 558          * Sometimes the hardware sends a single packet with z = 0
 559          * in the middle of a stream. Real releases generate packets
 560          * with x, y, and z all zero, so these seem to be flukes.
 561          * Ignore them.
 562          */
 563         if (f.x && f.y && !f.z)
 564                 return;
 565
 566         /*
 567          * If we don't have MT data or the bitmaps were empty, we have
 568          * to rely on ST data.
 569          */
 570         if (!fingers) {
 571                 x1 = f.x;
 572                 y1 = f.y;
 573                 fingers = f.z > 0 ? 1 : 0;
 574         }
 575
 576         if (f.z >= 64)
 577                 input_report_key(dev, BTN_TOUCH, 1);
 578         else
 579                 input_report_key(dev, BTN_TOUCH, 0);
 580
 581         alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
 582
 583         input_mt_report_finger_count(dev, fingers);
 584
 585         input_report_key(dev, BTN_LEFT, f.left);
 586         input_report_key(dev, BTN_RIGHT, f.right);
 587         input_report_key(dev, BTN_MIDDLE, f.middle);
 588
 589         if (f.z > 0) {
 590                 input_report_abs(dev, ABS_X, f.x);
 591                 input_report_abs(dev, ABS_Y, f.y);
 592         }
 593         input_report_abs(dev, ABS_PRESSURE, f.z);
 594
 595         input_sync(dev);
 596
 597         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 598                 input_report_key(dev2, BTN_LEFT, f.ts_left);
 599                 input_report_key(dev2, BTN_RIGHT, f.ts_right);
 600                 input_report_key(dev2, BTN_MIDDLE, f.ts_middle);
 601                 input_sync(dev2);
 602         }
 603 }
 604
 605 static void alps_process_packet_v3(struct psmouse *psmouse)
 606 {
 607         unsigned char *packet = psmouse->packet;
 608
 609         /*
 610          * v3 protocol packets come in three types, two representing
 611          * touchpad data and one representing trackstick data.
 612          * Trackstick packets seem to be distinguished by always
 613          * having 0x3f in the last byte. This value has never been
 614          * observed in the last byte of either of the other types
 615          * of packets.
 616          */
 617         if (packet[5] == 0x3f) {
 618                 alps_process_trackstick_packet_v3(psmouse);
 619                 return;
 620         }
 621
 622         alps_process_touchpad_packet_v3(psmouse);
 623 }
 624
 625 static void alps_process_packet_v4(struct psmouse *psmouse)
 626 {
 627         struct alps_data *priv = psmouse->private;
 628         unsigned char *packet = psmouse->packet;
 629         struct input_dev *dev = psmouse->dev;
 630         int offset;
 631         int x, y, z;
 632         int left, right;
 633         int x1, y1, x2, y2;
 634         int fingers = 0;
 635         unsigned int x_bitmap, y_bitmap;
 636
 637         /*
 638          * v4 has a 6-byte encoding for bitmap data, but this data is
 639          * broken up between 3 normal packets. Use priv->multi_packet to
 640          * track our position in the bitmap packet.
 641          */
 642         if (packet[6] & 0x40) {
 643                 /* sync, reset position */
 644                 priv->multi_packet = 0;
 645         }
 646
 647         if (WARN_ON_ONCE(priv->multi_packet > 2))
 648                 return;
 649
 650         offset = 2 * priv->multi_packet;
 651         priv->multi_data[offset] = packet[6];
 652         priv->multi_data[offset + 1] = packet[7];
 653
 654         if (++priv->multi_packet > 2) {
 655                 priv->multi_packet = 0;
 656
 657                 x_bitmap = ((priv->multi_data[2] & 0x1f) << 10) |
 658                            ((priv->multi_data[3] & 0x60) << 3) |
 659                            ((priv->multi_data[0] & 0x3f) << 2) |
 660                            ((priv->multi_data[1] & 0x60) >> 5);
 661                 y_bitmap = ((priv->multi_data[5] & 0x01) << 10) |
 662                            ((priv->multi_data[3] & 0x1f) << 5) |
 663                             (priv->multi_data[1] & 0x1f);
 664
 665                 fingers = alps_process_bitmap(priv, x_bitmap, y_bitmap,
 666                                               &x1, &y1, &x2, &y2);
 667
 668                 /* Store MT data.*/
 669                 priv->fingers = fingers;
 670                 priv->x1 = x1;
 671                 priv->x2 = x2;
 672                 priv->y1 = y1;
 673                 priv->y2 = y2;
 674         }
 675
 676         left = packet[4] & 0x01;
 677         right = packet[4] & 0x02;
 678
 679         x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 680             ((packet[0] & 0x30) >> 4);
 681         y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 682         z = packet[5] & 0x7f;
 683
 684         /*
 685          * If there were no contacts in the bitmap, use ST
 686          * points in MT reports.
 687          * If there were two contacts or more, report MT data.
 688          */
 689         if (priv->fingers < 2) {
 690                 x1 = x;
 691                 y1 = y;
 692                 fingers = z > 0 ? 1 : 0;
 693         } else {
 694                 fingers = priv->fingers;
 695                 x1 = priv->x1;
 696                 x2 = priv->x2;
 697                 y1 = priv->y1;
 698                 y2 = priv->y2;
 699         }
 700
 701         if (z >= 64)
 702                 input_report_key(dev, BTN_TOUCH, 1);
 703         else
 704                 input_report_key(dev, BTN_TOUCH, 0);
 705
 706         alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
 707
 708         input_mt_report_finger_count(dev, fingers);
 709
 710         input_report_key(dev, BTN_LEFT, left);
 711         input_report_key(dev, BTN_RIGHT, right);
 712
 713         if (z > 0) {
 714                 input_report_abs(dev, ABS_X, x);
 715                 input_report_abs(dev, ABS_Y, y);
 716         }
 717         input_report_abs(dev, ABS_PRESSURE, z);
 718
 719         input_sync(dev);
 720 }
 721
 722 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 723                                         unsigned char packet[],
 724                                         bool report_buttons)
 725 {
 726         struct alps_data *priv = psmouse->private;
 727         struct input_dev *dev2 = priv->dev2;
 728
 729         if (report_buttons)
 730                 alps_report_buttons(psmouse, dev2, psmouse->dev,
 731                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
 732
 733         input_report_rel(dev2, REL_X,
 734                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
 735         input_report_rel(dev2, REL_Y,
 736                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
 737
 738         input_sync(dev2);
 739 }
 740
 741 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 742 {
 743         struct alps_data *priv = psmouse->private;
 744
 745         if (psmouse->pktcnt < 6)
 746                 return PSMOUSE_GOOD_DATA;
 747
 748         if (psmouse->pktcnt == 6) {
 749                 /*
 750                  * Start a timer to flush the packet if it ends up last
 751                  * 6-byte packet in the stream. Timer needs to fire
 752                  * psmouse core times out itself. 20 ms should be enough
 753                  * to decide if we are getting more data or not.
 754                  */
 755                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
 756                 return PSMOUSE_GOOD_DATA;
 757         }
 758
 759         del_timer(&priv->timer);
 760
 761         if (psmouse->packet[6] & 0x80) {
 762
 763                 /*
 764                  * Highest bit is set - that means we either had
 765                  * complete ALPS packet and this is start of the
 766                  * next packet or we got garbage.
 767                  */
 768
 769                 if (((psmouse->packet[3] |
 770                       psmouse->packet[4] |
 771                       psmouse->packet[5]) & 0x80) ||
 772                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
 773                         psmouse_dbg(psmouse,
 774                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
 775                                     psmouse->packet + 3);
 776                         return PSMOUSE_BAD_DATA;
 777                 }
 778
 779                 priv->process_packet(psmouse);
 780
 781                 /* Continue with the next packet */
 782                 psmouse->packet[0] = psmouse->packet[6];
 783                 psmouse->pktcnt = 1;
 784
 785         } else {
 786
 787                 /*
 788                  * High bit is 0 - that means that we indeed got a PS/2
 789                  * packet in the middle of ALPS packet.
 790                  *
 791                  * There is also possibility that we got 6-byte ALPS
 792                  * packet followed  by 3-byte packet from trackpoint. We
 793                  * can not distinguish between these 2 scenarios but
 794                  * because the latter is unlikely to happen in course of
 795                  * normal operation (user would need to press all
 796                  * buttons on the pad and start moving trackpoint
 797                  * without touching the pad surface) we assume former.
 798                  * Even if we are wrong the wost thing that would happen
 799                  * the cursor would jump but we should not get protocol
 800                  * de-synchronization.
 801                  */
 802
 803                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
 804                                             false);
 805
 806                 /*
 807                  * Continue with the standard ALPS protocol handling,
 808                  * but make sure we won't process it as an interleaved
 809                  * packet again, which may happen if all buttons are
 810                  * pressed. To avoid this let's reset the 4th bit which
 811                  * is normally 1.
 812                  */
 813                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
 814                 psmouse->pktcnt = 4;
 815         }
 816
 817         return PSMOUSE_GOOD_DATA;
 818 }
 819
 820 static void alps_flush_packet(unsigned long data)
 821 {
 822         struct psmouse *psmouse = (struct psmouse *)data;
 823         struct alps_data *priv = psmouse->private;
 824
 825         serio_pause_rx(psmouse->ps2dev.serio);
 826
 827         if (psmouse->pktcnt == psmouse->pktsize) {
 828
 829                 /*
 830                  * We did not any more data in reasonable amount of time.
 831                  * Validate the last 3 bytes and process as a standard
 832                  * ALPS packet.
 833                  */
 834                 if ((psmouse->packet[3] |
 835                      psmouse->packet[4] |
 836                      psmouse->packet[5]) & 0x80) {
 837                         psmouse_dbg(psmouse,
 838                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
 839                                     psmouse->packet + 3);
 840                 } else {
 841                         priv->process_packet(psmouse);
 842                 }
 843                 psmouse->pktcnt = 0;
 844         }
 845
 846         serio_continue_rx(psmouse->ps2dev.serio);
 847 }
 848
 849 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 850 {
 851         struct alps_data *priv = psmouse->private;
 852
 853         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 854                 if (psmouse->pktcnt == 3) {
 855                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
 856                                                     true);
 857                         return PSMOUSE_FULL_PACKET;
 858                 }
 859                 return PSMOUSE_GOOD_DATA;
 860         }
 861
 862         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
 863
 864         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
 865             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
 866                 return alps_handle_interleaved_ps2(psmouse);
 867         }
 868
 869         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
 870                 psmouse_dbg(psmouse,
 871                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
 872                             psmouse->packet[0], priv->mask0, priv->byte0);
 873                 return PSMOUSE_BAD_DATA;
 874         }
 875
 876         /* Bytes 2 - pktsize should have 0 in the highest bit */
 877         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
 878             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
 879                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
 880                             psmouse->pktcnt - 1,
 881                             psmouse->packet[psmouse->pktcnt - 1]);
 882                 return PSMOUSE_BAD_DATA;
 883         }
 884
 885         if (psmouse->pktcnt == psmouse->pktsize) {
 886                 priv->process_packet(psmouse);
 887                 return PSMOUSE_FULL_PACKET;
 888         }
 889
 890         return PSMOUSE_GOOD_DATA;
 891 }
 892
 893 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
 894 {
 895         struct ps2dev *ps2dev = &psmouse->ps2dev;
 896         struct alps_data *priv = psmouse->private;
 897         int command;
 898         unsigned char *param;
 899         unsigned char dummy[4];
 900
 901         BUG_ON(nibble > 0xf);
 902
 903         command = priv->nibble_commands[nibble].command;
 904         param = (command & 0x0f00) ?
 905                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
 906
 907         if (ps2_command(ps2dev, param, command))
 908                 return -1;
 909
 910         return 0;
 911 }
 912
 913 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
 914 {
 915         struct ps2dev *ps2dev = &psmouse->ps2dev;
 916         struct alps_data *priv = psmouse->private;
 917         int i, nibble;
 918
 919         if (ps2_command(ps2dev, NULL, priv->addr_command))
 920                 return -1;
 921
 922         for (i = 12; i >= 0; i -= 4) {
 923                 nibble = (addr >> i) & 0xf;
 924                 if (alps_command_mode_send_nibble(psmouse, nibble))
 925                         return -1;
 926         }
 927
 928         return 0;
 929 }
 930
 931 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
 932 {
 933         struct ps2dev *ps2dev = &psmouse->ps2dev;
 934         unsigned char param[4];
 935
 936         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 937                 return -1;
 938
 939         /*
 940          * The address being read is returned in the first two bytes
 941          * of the result. Check that this address matches the expected
 942          * address.
 943          */
 944         if (addr != ((param[0] << 8) | param[1]))
 945                 return -1;
 946
 947         return param[2];
 948 }
 949
 950 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
 951 {
 952         if (alps_command_mode_set_addr(psmouse, addr))
 953                 return -1;
 954         return __alps_command_mode_read_reg(psmouse, addr);
 955 }
 956
 957 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
 958 {
 959         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
 960                 return -1;
 961         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
 962                 return -1;
 963         return 0;
 964 }
 965
 966 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
 967                                        u8 value)
 968 {
 969         if (alps_command_mode_set_addr(psmouse, addr))
 970                 return -1;
 971         return __alps_command_mode_write_reg(psmouse, value);
 972 }
 973
 974 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
 975                         int repeated_command, unsigned char *param)
 976 {
 977         struct ps2dev *ps2dev = &psmouse->ps2dev;
 978
 979         param[0] = 0;
 980         if (init_command && ps2_command(ps2dev, param, init_command))
 981                 return -EIO;
 982
 983         if (ps2_command(ps2dev,  NULL, repeated_command) ||
 984             ps2_command(ps2dev,  NULL, repeated_command) ||
 985             ps2_command(ps2dev,  NULL, repeated_command))
 986                 return -EIO;
 987
 988         param[0] = param[1] = param[2] = 0xff;
 989         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 990                 return -EIO;
 991
 992         psmouse_dbg(psmouse, "%2.2X report: %2.2x %2.2x %2.2x\n",
 993                     repeated_command, param[0], param[1], param[2]);
 994         return 0;
 995 }
 996
 997 static int alps_enter_command_mode(struct psmouse *psmouse,
 998                                    unsigned char *resp)
 999 {
1000         unsigned char param[4];
1001
1002         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1003                 psmouse_err(psmouse, "failed to enter command mode\n");
1004                 return -1;
1005         }
1006
1007         if (param[0] != 0x88 || (param[1] != 0x07 && param[1] != 0x08)) {
1008                 psmouse_dbg(psmouse,
1009                             "unknown response while entering command mode\n");
1010                 return -1;
1011         }
1012
1013         if (resp)
1014                 *resp = param[2];
1015         return 0;
1016 }
1017
1018 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1019 {
1020         struct ps2dev *ps2dev = &psmouse->ps2dev;
1021         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1022                 return -1;
1023         return 0;
1024 }
1025
1026 /*
1027  * For DualPoint devices select the device that should respond to
1028  * subsequent commands. It looks like glidepad is behind stickpointer,
1029  * I'd thought it would be other way around...
1030  */
1031 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1032 {
1033         struct ps2dev *ps2dev = &psmouse->ps2dev;
1034         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1035
1036         if (ps2_command(ps2dev, NULL, cmd) ||
1037             ps2_command(ps2dev, NULL, cmd) ||
1038             ps2_command(ps2dev, NULL, cmd) ||
1039             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1040                 return -1;
1041
1042         /* we may get 3 more bytes, just ignore them */
1043         ps2_drain(ps2dev, 3, 100);
1044
1045         return 0;
1046 }
1047
1048 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1049 {
1050         struct ps2dev *ps2dev = &psmouse->ps2dev;
1051
1052         /* Try ALPS magic knock - 4 disable before enable */
1053         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1054             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1055             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1056             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1057             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1058                 return -1;
1059
1060         /*
1061          * Switch mouse to poll (remote) mode so motion data will not
1062          * get in our way
1063          */
1064         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1065 }
1066
1067 static int alps_get_status(struct psmouse *psmouse, char *param)
1068 {
1069         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1070         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1071                 return -1;
1072
1073         return 0;
1074 }
1075
1076 /*
1077  * Turn touchpad tapping on or off. The sequences are:
1078  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1079  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1080  * My guess that 0xE9 (GetInfo) is here as a sync point.
1081  * For models that also have stickpointer (DualPoints) its tapping
1082  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1083  * we don't fiddle with it.
1084  */
1085 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1086 {
1087         struct ps2dev *ps2dev = &psmouse->ps2dev;
1088         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1089         unsigned char tap_arg = enable ? 0x0A : 0x00;
1090         unsigned char param[4];
1091
1092         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1093             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1094             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1095             ps2_command(ps2dev, &tap_arg, cmd))
1096                 return -1;
1097
1098         if (alps_get_status(psmouse, param))
1099                 return -1;
1100
1101         return 0;
1102 }
1103
1104 /*
1105  * alps_poll() - poll the touchpad for current motion packet.
1106  * Used in resync.
1107  */
1108 static int alps_poll(struct psmouse *psmouse)
1109 {
1110         struct alps_data *priv = psmouse->private;
1111         unsigned char buf[sizeof(psmouse->packet)];
1112         bool poll_failed;
1113
1114         if (priv->flags & ALPS_PASS)
1115                 alps_passthrough_mode_v2(psmouse, true);
1116
1117         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1118                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1119
1120         if (priv->flags & ALPS_PASS)
1121                 alps_passthrough_mode_v2(psmouse, false);
1122
1123         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1124                 return -1;
1125
1126         if ((psmouse->badbyte & 0xc8) == 0x08) {
1127 /*
1128  * Poll the track stick ...
1129  */
1130                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1131                         return -1;
1132         }
1133
1134         memcpy(psmouse->packet, buf, sizeof(buf));
1135         return 0;
1136 }
1137
1138 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1139 {
1140         struct alps_data *priv = psmouse->private;
1141
1142         if ((priv->flags & ALPS_PASS) &&
1143             alps_passthrough_mode_v2(psmouse, true)) {
1144                 return -1;
1145         }
1146
1147         if (alps_tap_mode(psmouse, true)) {
1148                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1149                 return -1;
1150         }
1151
1152         if (alps_absolute_mode_v1_v2(psmouse)) {
1153                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1154                 return -1;
1155         }
1156
1157         if ((priv->flags & ALPS_PASS) &&
1158             alps_passthrough_mode_v2(psmouse, false)) {
1159                 return -1;
1160         }
1161
1162         /* ALPS needs stream mode, otherwise it won't report any data */
1163         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1164                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1165                 return -1;
1166         }
1167
1168         return 0;
1169 }
1170
1171 /*
1172  * Enable or disable passthrough mode to the trackstick.
1173  */
1174 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1175                                     int reg_base, bool enable)
1176 {
1177         int reg_val, ret = -1;
1178
1179         if (alps_enter_command_mode(psmouse, NULL))
1180                 return -1;
1181
1182         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1183         if (reg_val == -1)
1184                 goto error;
1185
1186         if (enable)
1187                 reg_val |= 0x01;
1188         else
1189                 reg_val &= ~0x01;
1190
1191         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1192
1193 error:
1194         if (alps_exit_command_mode(psmouse))
1195                 ret = -1;
1196         return ret;
1197 }
1198
1199 /* Must be in command mode when calling this function */
1200 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1201 {
1202         int reg_val;
1203
1204         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1205         if (reg_val == -1)
1206                 return -1;
1207
1208         reg_val |= 0x06;
1209         if (__alps_command_mode_write_reg(psmouse, reg_val))
1210                 return -1;
1211
1212         return 0;
1213 }
1214
1215 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
1216 {
1217         int ret = -EIO, reg_val;
1218
1219         if (alps_enter_command_mode(psmouse, NULL))
1220                 goto error;
1221
1222         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
1223         if (reg_val == -1)
1224                 goto error;
1225
1226         /* bit 7: trackstick is present */
1227         ret = reg_val & 0x80 ? 0 : -ENODEV;
1228
1229 error:
1230         alps_exit_command_mode(psmouse);
1231         return ret;
1232 }
1233
1234 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
1235 {
1236         struct ps2dev *ps2dev = &psmouse->ps2dev;
1237         int ret = 0;
1238         unsigned char param[4];
1239
1240         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
1241                 return -EIO;
1242
1243         /*
1244          * E7 report for the trackstick
1245          *
1246          * There have been reports of failures to seem to trace back
1247          * to the above trackstick check failing. When these occur
1248          * this E7 report fails, so when that happens we continue
1249          * with the assumption that there isn't a trackstick after
1250          * all.
1251          */
1252         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
1253                 psmouse_warn(psmouse, "trackstick E7 report failed\n");
1254                 ret = -ENODEV;
1255         } else {
1256                 psmouse_dbg(psmouse,
1257                             "trackstick E7 report: %2.2x %2.2x %2.2x\n",
1258                             param[0], param[1], param[2]);
1259
1260                 /*
1261                  * Not sure what this does, but it is absolutely
1262                  * essential. Without it, the touchpad does not
1263                  * work at all and the trackstick just emits normal
1264                  * PS/2 packets.
1265                  */
1266                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1267                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1268                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1269                     alps_command_mode_send_nibble(psmouse, 0x9) ||
1270                     alps_command_mode_send_nibble(psmouse, 0x4)) {
1271                         psmouse_err(psmouse,
1272                                     "Error sending magic E6 sequence\n");
1273                         ret = -EIO;
1274                         goto error;
1275                 }
1276
1277                 /*
1278                  * This ensures the trackstick packets are in the format
1279                  * supported by this driver. If bit 1 isn't set the packet
1280                  * format is different.
1281                  */
1282                 if (alps_enter_command_mode(psmouse, NULL) ||
1283                     alps_command_mode_write_reg(psmouse,
1284                                                 reg_base + 0x08, 0x82) ||
1285                     alps_exit_command_mode(psmouse))
1286                         ret = -EIO;
1287         }
1288
1289 error:
1290         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
1291                 ret = -EIO;
1292
1293         return ret;
1294 }
1295
1296 static int alps_hw_init_v3(struct psmouse *psmouse)
1297 {
1298         struct ps2dev *ps2dev = &psmouse->ps2dev;
1299         int reg_val;
1300         unsigned char param[4];
1301
1302         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
1303         if (reg_val == -EIO)
1304                 goto error;
1305         if (reg_val == 0 &&
1306             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
1307                 goto error;
1308
1309         if (alps_enter_command_mode(psmouse, NULL) ||
1310             alps_absolute_mode_v3(psmouse)) {
1311                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1312                 goto error;
1313         }
1314
1315         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1316         if (reg_val == -1)
1317                 goto error;
1318         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1319                 goto error;
1320
1321         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1322         if (reg_val == -1)
1323                 goto error;
1324         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1325                 goto error;
1326
1327         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1328                 goto error;
1329         if (__alps_command_mode_write_reg(psmouse, 0x04))
1330                 goto error;
1331
1332         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1333                 goto error;
1334         if (__alps_command_mode_write_reg(psmouse, 0x03))
1335                 goto error;
1336
1337         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1338                 goto error;
1339         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1340                 goto error;
1341
1342         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1343                 goto error;
1344         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1345                 goto error;
1346
1347         alps_exit_command_mode(psmouse);
1348
1349         /* Set rate and enable data reporting */
1350         param[0] = 0x64;
1351         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1352             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1353                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1354                 return -1;
1355         }
1356
1357         return 0;
1358
1359 error:
1360         /*
1361          * Leaving the touchpad in command mode will essentially render
1362          * it unusable until the machine reboots, so exit it here just
1363          * to be safe
1364          */
1365         alps_exit_command_mode(psmouse);
1366         return -1;
1367 }
1368
1369 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
1370 {
1371         struct alps_data *priv = psmouse->private;
1372         struct ps2dev *ps2dev = &psmouse->ps2dev;
1373         int reg_val, ret = -1;
1374
1375         if (priv->flags & ALPS_DUALPOINT) {
1376                 reg_val = alps_setup_trackstick_v3(psmouse,
1377                                                    ALPS_REG_BASE_RUSHMORE);
1378                 if (reg_val == -EIO)
1379                         goto error;
1380                 if (reg_val == -ENODEV)
1381                         priv->flags &= ~ALPS_DUALPOINT;
1382         }
1383
1384         if (alps_enter_command_mode(psmouse, NULL) ||
1385             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
1386             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
1387                 goto error;
1388
1389         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
1390         if (reg_val == -1)
1391                 goto error;
1392         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
1393                 goto error;
1394
1395         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
1396                 goto error;
1397
1398         /* enter absolute mode */
1399         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
1400         if (reg_val == -1)
1401                 goto error;
1402         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
1403                 goto error;
1404
1405         alps_exit_command_mode(psmouse);
1406         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1407
1408 error:
1409         alps_exit_command_mode(psmouse);
1410         return ret;
1411 }
1412
1413 /* Must be in command mode when calling this function */
1414 static int alps_absolute_mode_v4(struct psmouse *psmouse)
1415 {
1416         int reg_val;
1417
1418         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1419         if (reg_val == -1)
1420                 return -1;
1421
1422         reg_val |= 0x02;
1423         if (__alps_command_mode_write_reg(psmouse, reg_val))
1424                 return -1;
1425
1426         return 0;
1427 }
1428
1429 static int alps_hw_init_v4(struct psmouse *psmouse)
1430 {
1431         struct ps2dev *ps2dev = &psmouse->ps2dev;
1432         unsigned char param[4];
1433
1434         if (alps_enter_command_mode(psmouse, NULL))
1435                 goto error;
1436
1437         if (alps_absolute_mode_v4(psmouse)) {
1438                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1439                 goto error;
1440         }
1441
1442         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
1443                 goto error;
1444
1445         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
1446                 goto error;
1447
1448         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
1449                 goto error;
1450
1451         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
1452                 goto error;
1453
1454         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
1455                 goto error;
1456
1457         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
1458                 goto error;
1459
1460         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
1461                 goto error;
1462
1463         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
1464                 goto error;
1465
1466         alps_exit_command_mode(psmouse);
1467
1468         /*
1469          * This sequence changes the output from a 9-byte to an
1470          * 8-byte format. All the same data seems to be present,
1471          * just in a more compact format.
1472          */
1473         param[0] = 0xc8;
1474         param[1] = 0x64;
1475         param[2] = 0x50;
1476         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1477             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
1478             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
1479             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1480                 return -1;
1481
1482         /* Set rate and enable data reporting */
1483         param[0] = 0x64;
1484         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1485             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1486                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1487                 return -1;
1488         }
1489
1490         return 0;
1491
1492 error:
1493         /*
1494          * Leaving the touchpad in command mode will essentially render
1495          * it unusable until the machine reboots, so exit it here just
1496          * to be safe
1497          */
1498         alps_exit_command_mode(psmouse);
1499         return -1;
1500 }
1501
1502 static void alps_set_defaults(struct alps_data *priv)
1503 {
1504         priv->byte0 = 0x8f;
1505         priv->mask0 = 0x8f;
1506         priv->flags = ALPS_DUALPOINT;
1507
1508         priv->x_max = 2000;
1509         priv->y_max = 1400;
1510         priv->x_bits = 15;
1511         priv->y_bits = 11;
1512
1513         switch (priv->proto_version) {
1514         case ALPS_PROTO_V1:
1515         case ALPS_PROTO_V2:
1516                 priv->hw_init = alps_hw_init_v1_v2;
1517                 priv->process_packet = alps_process_packet_v1_v2;
1518                 priv->set_abs_params = alps_set_abs_params_st;
1519                 break;
1520         case ALPS_PROTO_V3:
1521                 priv->hw_init = alps_hw_init_v3;
1522                 priv->process_packet = alps_process_packet_v3;
1523                 priv->set_abs_params = alps_set_abs_params_mt;
1524                 priv->decode_fields = alps_decode_pinnacle;
1525                 priv->nibble_commands = alps_v3_nibble_commands;
1526                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
1527                 break;
1528         case ALPS_PROTO_V4:
1529                 priv->hw_init = alps_hw_init_v4;
1530                 priv->process_packet = alps_process_packet_v4;
1531                 priv->set_abs_params = alps_set_abs_params_mt;
1532                 priv->nibble_commands = alps_v4_nibble_commands;
1533                 priv->addr_command = PSMOUSE_CMD_DISABLE;
1534                 break;
1535         }
1536 }
1537
1538 static int alps_match_table(struct psmouse *psmouse, struct alps_data *priv,
1539                             unsigned char *e7, unsigned char *ec)
1540 {
1541         const struct alps_model_info *model;
1542         int i;
1543
1544         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
1545                 model = &alps_model_data[i];
1546
1547                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
1548                     (!model->command_mode_resp ||
1549                      model->command_mode_resp == ec[2])) {
1550
1551                         priv->proto_version = model->proto_version;
1552                         alps_set_defaults(priv);
1553
1554                         priv->flags = model->flags;
1555                         priv->byte0 = model->byte0;
1556                         priv->mask0 = model->mask0;
1557
1558                         return 0;
1559                 }
1560         }
1561
1562         return -EINVAL;
1563 }
1564
1565 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
1566 {
1567         unsigned char e6[4], e7[4], ec[4];
1568
1569         /*
1570          * First try "E6 report".
1571          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
1572          * The bits 0-2 of the first byte will be 1s if some buttons are
1573          * pressed.
1574          */
1575         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
1576                          PSMOUSE_CMD_SETSCALE11, e6))
1577                 return -EIO;
1578
1579         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
1580                 return -EINVAL;
1581
1582         /*
1583          * Now get the "E7" and "EC" reports.  These will uniquely identify
1584          * most ALPS touchpads.
1585          */
1586         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
1587                          PSMOUSE_CMD_SETSCALE21, e7) ||
1588             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
1589                          PSMOUSE_CMD_RESET_WRAP, ec) ||
1590             alps_exit_command_mode(psmouse))
1591                 return -EIO;
1592
1593         if (alps_match_table(psmouse, priv, e7, ec) == 0) {
1594                 return 0;
1595         } else if (ec[0] == 0x88 && ec[1] == 0x08) {
1596                 priv->proto_version = ALPS_PROTO_V3;
1597                 alps_set_defaults(priv);
1598
1599                 priv->hw_init = alps_hw_init_rushmore_v3;
1600                 priv->decode_fields = alps_decode_rushmore;
1601                 priv->x_bits = 16;
1602                 priv->y_bits = 12;
1603
1604                 /* hack to make addr_command, nibble_command available */
1605                 psmouse->private = priv;
1606
1607                 if (alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_RUSHMORE))
1608                         priv->flags &= ~ALPS_DUALPOINT;
1609
1610                 return 0;
1611         } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
1612                    ec[2] >= 0x90 && ec[2] <= 0x9d) {
1613                 priv->proto_version = ALPS_PROTO_V3;
1614                 alps_set_defaults(priv);
1615
1616                 return 0;
1617         }
1618
1619         psmouse_info(psmouse,
1620                 "Unknown ALPS touchpad: E7=%2.2x %2.2x %2.2x, EC=%2.2x %2.2x %2.2x\n",
1621                 e7[0], e7[1], e7[2], ec[0], ec[1], ec[2]);
1622
1623         return -EINVAL;
1624 }
1625
1626 static int alps_reconnect(struct psmouse *psmouse)
1627 {
1628         struct alps_data *priv = psmouse->private;
1629
1630         psmouse_reset(psmouse);
1631
1632         if (alps_identify(psmouse, priv) < 0)
1633                 return -1;
1634
1635         return priv->hw_init(psmouse);
1636 }
1637
1638 static void alps_disconnect(struct psmouse *psmouse)
1639 {
1640         struct alps_data *priv = psmouse->private;
1641
1642         psmouse_reset(psmouse);
1643         del_timer_sync(&priv->timer);
1644         input_unregister_device(priv->dev2);
1645         kfree(priv);
1646 }
1647
1648 static void alps_set_abs_params_st(struct alps_data *priv,
1649                                    struct input_dev *dev1)
1650 {
1651         input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
1652         input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
1653 }
1654
1655 static void alps_set_abs_params_mt(struct alps_data *priv,
1656                                    struct input_dev *dev1)
1657 {
1658         set_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
1659         input_mt_init_slots(dev1, 2, 0);
1660         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
1661         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
1662
1663         set_bit(BTN_TOOL_DOUBLETAP, dev1->keybit);
1664         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
1665         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
1666
1667         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
1668         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
1669 }
1670
1671 int alps_init(struct psmouse *psmouse)
1672 {
1673         struct alps_data *priv;
1674         struct input_dev *dev1 = psmouse->dev, *dev2;
1675
1676         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
1677         dev2 = input_allocate_device();
1678         if (!priv || !dev2)
1679                 goto init_fail;
1680
1681         priv->dev2 = dev2;
1682         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
1683
1684         psmouse->private = priv;
1685
1686         psmouse_reset(psmouse);
1687
1688         if (alps_identify(psmouse, priv) < 0)
1689                 goto init_fail;
1690
1691         if (priv->hw_init(psmouse))
1692                 goto init_fail;
1693
1694         /*
1695          * Undo part of setup done for us by psmouse core since touchpad
1696          * is not a relative device.
1697          */
1698         __clear_bit(EV_REL, dev1->evbit);
1699         __clear_bit(REL_X, dev1->relbit);
1700         __clear_bit(REL_Y, dev1->relbit);
1701
1702         /*
1703          * Now set up our capabilities.
1704          */
1705         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
1706         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
1707         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
1708         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
1709                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1710
1711         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
1712
1713         priv->set_abs_params(priv, dev1);
1714         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
1715
1716         if (priv->flags & ALPS_WHEEL) {
1717                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
1718                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
1719         }
1720
1721         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
1722                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
1723                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
1724         }
1725
1726         if (priv->flags & ALPS_FOUR_BUTTONS) {
1727                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
1728                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
1729                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
1730                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
1731         } else {
1732                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
1733         }
1734
1735         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
1736         dev2->phys = priv->phys;
1737         dev2->name = (priv->flags & ALPS_DUALPOINT) ?
1738                      "DualPoint Stick" : "PS/2 Mouse";
1739         dev2->id.bustype = BUS_I8042;
1740         dev2->id.vendor  = 0x0002;
1741         dev2->id.product = PSMOUSE_ALPS;
1742         dev2->id.version = 0x0000;
1743         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
1744
1745         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
1746         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
1747         dev2->keybit[BIT_WORD(BTN_LEFT)] =
1748                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
1749
1750         if (input_register_device(priv->dev2))
1751                 goto init_fail;
1752
1753         psmouse->protocol_handler = alps_process_byte;
1754         psmouse->poll = alps_poll;
1755         psmouse->disconnect = alps_disconnect;
1756         psmouse->reconnect = alps_reconnect;
1757         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
1758
1759         /* We are having trouble resyncing ALPS touchpads so disable it for now */
1760         psmouse->resync_time = 0;
1761
1762         return 0;
1763
1764 init_fail:
1765         psmouse_reset(psmouse);
1766         input_free_device(dev2);
1767         kfree(priv);
1768         psmouse->private = NULL;
1769         return -1;
1770 }
1771
1772 int alps_detect(struct psmouse *psmouse, bool set_properties)
1773 {
1774         struct alps_data dummy;
1775
1776         if (alps_identify(psmouse, &dummy) < 0)
1777                 return -1;
1778
1779         if (set_properties) {
1780                 psmouse->vendor = "ALPS";
1781                 psmouse->name = dummy.flags & ALPS_DUALPOINT ?
1782                                 "DualPoint TouchPad" : "GlidePoint";
1783                 psmouse->model = dummy.proto_version << 8;
1784         }
1785         return 0;
1786 }
1787