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_decode_dolphin(struct alps_fields *f, unsigned char *p)
 494 {
 495         f->first_mp = !!(p[0] & 0x02);
 496         f->is_mp = !!(p[0] & 0x20);
 497
 498         f->fingers = ((p[0] & 0x6) >> 1 |
 499                      (p[0] & 0x10) >> 2);
 500         f->x_map = ((p[2] & 0x60) >> 5) |
 501                    ((p[4] & 0x7f) << 2) |
 502                    ((p[5] & 0x7f) << 9) |
 503                    ((p[3] & 0x07) << 16) |
 504                    ((p[3] & 0x70) << 15) |
 505                    ((p[0] & 0x01) << 22);
 506         f->y_map = (p[1] & 0x7f) |
 507                    ((p[2] & 0x1f) << 7);
 508
 509         f->x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 510         f->y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 511         f->z = (p[0] & 4) ? 0 : p[5] & 0x7f;
 512
 513         alps_decode_buttons_v3(f, p);
 514 }
 515
 516 static void alps_process_touchpad_packet_v3(struct psmouse *psmouse)
 517 {
 518         struct alps_data *priv = psmouse->private;
 519         unsigned char *packet = psmouse->packet;
 520         struct input_dev *dev = psmouse->dev;
 521         struct input_dev *dev2 = priv->dev2;
 522         int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
 523         int fingers = 0, bmap_fingers;
 524         struct alps_fields f;
 525
 526         priv->decode_fields(&f, packet);
 527
 528         /*
 529          * There's no single feature of touchpad position and bitmap packets
 530          * that can be used to distinguish between them. We rely on the fact
 531          * that a bitmap packet should always follow a position packet with
 532          * bit 6 of packet[4] set.
 533          */
 534         if (priv->multi_packet) {
 535                 /*
 536                  * Sometimes a position packet will indicate a multi-packet
 537                  * sequence, but then what follows is another position
 538                  * packet. Check for this, and when it happens process the
 539                  * position packet as usual.
 540                  */
 541                 if (f.is_mp) {
 542                         fingers = f.fingers;
 543                         bmap_fingers = alps_process_bitmap(priv,
 544                                                            f.x_map, f.y_map,
 545                                                            &x1, &y1, &x2, &y2);
 546
 547                         /*
 548                          * We shouldn't report more than one finger if
 549                          * we don't have two coordinates.
 550                          */
 551                         if (fingers > 1 && bmap_fingers < 2)
 552                                 fingers = bmap_fingers;
 553
 554                         /* Now process position packet */
 555                         priv->decode_fields(&f, priv->multi_data);
 556                 } else {
 557                         priv->multi_packet = 0;
 558                 }
 559         }
 560
 561         /*
 562          * Bit 6 of byte 0 is not usually set in position packets. The only
 563          * times it seems to be set is in situations where the data is
 564          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 565          * this combined with the fact that this bit is useful for filtering
 566          * out misidentified bitmap packets, we reject anything with this
 567          * bit set.
 568          */
 569         if (f.is_mp)
 570                 return;
 571
 572         if (!priv->multi_packet && f.first_mp) {
 573                 priv->multi_packet = 1;
 574                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 575                 return;
 576         }
 577
 578         priv->multi_packet = 0;
 579
 580         /*
 581          * Sometimes the hardware sends a single packet with z = 0
 582          * in the middle of a stream. Real releases generate packets
 583          * with x, y, and z all zero, so these seem to be flukes.
 584          * Ignore them.
 585          */
 586         if (f.x && f.y && !f.z)
 587                 return;
 588
 589         /*
 590          * If we don't have MT data or the bitmaps were empty, we have
 591          * to rely on ST data.
 592          */
 593         if (!fingers) {
 594                 x1 = f.x;
 595                 y1 = f.y;
 596                 fingers = f.z > 0 ? 1 : 0;
 597         }
 598
 599         if (f.z >= 64)
 600                 input_report_key(dev, BTN_TOUCH, 1);
 601         else
 602                 input_report_key(dev, BTN_TOUCH, 0);
 603
 604         alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
 605
 606         input_mt_report_finger_count(dev, fingers);
 607
 608         input_report_key(dev, BTN_LEFT, f.left);
 609         input_report_key(dev, BTN_RIGHT, f.right);
 610         input_report_key(dev, BTN_MIDDLE, f.middle);
 611
 612         if (f.z > 0) {
 613                 input_report_abs(dev, ABS_X, f.x);
 614                 input_report_abs(dev, ABS_Y, f.y);
 615         }
 616         input_report_abs(dev, ABS_PRESSURE, f.z);
 617
 618         input_sync(dev);
 619
 620         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 621                 input_report_key(dev2, BTN_LEFT, f.ts_left);
 622                 input_report_key(dev2, BTN_RIGHT, f.ts_right);
 623                 input_report_key(dev2, BTN_MIDDLE, f.ts_middle);
 624                 input_sync(dev2);
 625         }
 626 }
 627
 628 static void alps_process_packet_v3(struct psmouse *psmouse)
 629 {
 630         unsigned char *packet = psmouse->packet;
 631
 632         /*
 633          * v3 protocol packets come in three types, two representing
 634          * touchpad data and one representing trackstick data.
 635          * Trackstick packets seem to be distinguished by always
 636          * having 0x3f in the last byte. This value has never been
 637          * observed in the last byte of either of the other types
 638          * of packets.
 639          */
 640         if (packet[5] == 0x3f) {
 641                 alps_process_trackstick_packet_v3(psmouse);
 642                 return;
 643         }
 644
 645         alps_process_touchpad_packet_v3(psmouse);
 646 }
 647
 648 static void alps_process_packet_v4(struct psmouse *psmouse)
 649 {
 650         struct alps_data *priv = psmouse->private;
 651         unsigned char *packet = psmouse->packet;
 652         struct input_dev *dev = psmouse->dev;
 653         int offset;
 654         int x, y, z;
 655         int left, right;
 656         int x1, y1, x2, y2;
 657         int fingers = 0;
 658         unsigned int x_bitmap, y_bitmap;
 659
 660         /*
 661          * v4 has a 6-byte encoding for bitmap data, but this data is
 662          * broken up between 3 normal packets. Use priv->multi_packet to
 663          * track our position in the bitmap packet.
 664          */
 665         if (packet[6] & 0x40) {
 666                 /* sync, reset position */
 667                 priv->multi_packet = 0;
 668         }
 669
 670         if (WARN_ON_ONCE(priv->multi_packet > 2))
 671                 return;
 672
 673         offset = 2 * priv->multi_packet;
 674         priv->multi_data[offset] = packet[6];
 675         priv->multi_data[offset + 1] = packet[7];
 676
 677         if (++priv->multi_packet > 2) {
 678                 priv->multi_packet = 0;
 679
 680                 x_bitmap = ((priv->multi_data[2] & 0x1f) << 10) |
 681                            ((priv->multi_data[3] & 0x60) << 3) |
 682                            ((priv->multi_data[0] & 0x3f) << 2) |
 683                            ((priv->multi_data[1] & 0x60) >> 5);
 684                 y_bitmap = ((priv->multi_data[5] & 0x01) << 10) |
 685                            ((priv->multi_data[3] & 0x1f) << 5) |
 686                             (priv->multi_data[1] & 0x1f);
 687
 688                 fingers = alps_process_bitmap(priv, x_bitmap, y_bitmap,
 689                                               &x1, &y1, &x2, &y2);
 690
 691                 /* Store MT data.*/
 692                 priv->fingers = fingers;
 693                 priv->x1 = x1;
 694                 priv->x2 = x2;
 695                 priv->y1 = y1;
 696                 priv->y2 = y2;
 697         }
 698
 699         left = packet[4] & 0x01;
 700         right = packet[4] & 0x02;
 701
 702         x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 703             ((packet[0] & 0x30) >> 4);
 704         y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 705         z = packet[5] & 0x7f;
 706
 707         /*
 708          * If there were no contacts in the bitmap, use ST
 709          * points in MT reports.
 710          * If there were two contacts or more, report MT data.
 711          */
 712         if (priv->fingers < 2) {
 713                 x1 = x;
 714                 y1 = y;
 715                 fingers = z > 0 ? 1 : 0;
 716         } else {
 717                 fingers = priv->fingers;
 718                 x1 = priv->x1;
 719                 x2 = priv->x2;
 720                 y1 = priv->y1;
 721                 y2 = priv->y2;
 722         }
 723
 724         if (z >= 64)
 725                 input_report_key(dev, BTN_TOUCH, 1);
 726         else
 727                 input_report_key(dev, BTN_TOUCH, 0);
 728
 729         alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
 730
 731         input_mt_report_finger_count(dev, fingers);
 732
 733         input_report_key(dev, BTN_LEFT, left);
 734         input_report_key(dev, BTN_RIGHT, right);
 735
 736         if (z > 0) {
 737                 input_report_abs(dev, ABS_X, x);
 738                 input_report_abs(dev, ABS_Y, y);
 739         }
 740         input_report_abs(dev, ABS_PRESSURE, z);
 741
 742         input_sync(dev);
 743 }
 744
 745 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 746                                         unsigned char packet[],
 747                                         bool report_buttons)
 748 {
 749         struct alps_data *priv = psmouse->private;
 750         struct input_dev *dev2 = priv->dev2;
 751
 752         if (report_buttons)
 753                 alps_report_buttons(psmouse, dev2, psmouse->dev,
 754                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
 755
 756         input_report_rel(dev2, REL_X,
 757                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
 758         input_report_rel(dev2, REL_Y,
 759                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
 760
 761         input_sync(dev2);
 762 }
 763
 764 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 765 {
 766         struct alps_data *priv = psmouse->private;
 767
 768         if (psmouse->pktcnt < 6)
 769                 return PSMOUSE_GOOD_DATA;
 770
 771         if (psmouse->pktcnt == 6) {
 772                 /*
 773                  * Start a timer to flush the packet if it ends up last
 774                  * 6-byte packet in the stream. Timer needs to fire
 775                  * psmouse core times out itself. 20 ms should be enough
 776                  * to decide if we are getting more data or not.
 777                  */
 778                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
 779                 return PSMOUSE_GOOD_DATA;
 780         }
 781
 782         del_timer(&priv->timer);
 783
 784         if (psmouse->packet[6] & 0x80) {
 785
 786                 /*
 787                  * Highest bit is set - that means we either had
 788                  * complete ALPS packet and this is start of the
 789                  * next packet or we got garbage.
 790                  */
 791
 792                 if (((psmouse->packet[3] |
 793                       psmouse->packet[4] |
 794                       psmouse->packet[5]) & 0x80) ||
 795                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
 796                         psmouse_dbg(psmouse,
 797                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
 798                                     psmouse->packet + 3);
 799                         return PSMOUSE_BAD_DATA;
 800                 }
 801
 802                 priv->process_packet(psmouse);
 803
 804                 /* Continue with the next packet */
 805                 psmouse->packet[0] = psmouse->packet[6];
 806                 psmouse->pktcnt = 1;
 807
 808         } else {
 809
 810                 /*
 811                  * High bit is 0 - that means that we indeed got a PS/2
 812                  * packet in the middle of ALPS packet.
 813                  *
 814                  * There is also possibility that we got 6-byte ALPS
 815                  * packet followed  by 3-byte packet from trackpoint. We
 816                  * can not distinguish between these 2 scenarios but
 817                  * because the latter is unlikely to happen in course of
 818                  * normal operation (user would need to press all
 819                  * buttons on the pad and start moving trackpoint
 820                  * without touching the pad surface) we assume former.
 821                  * Even if we are wrong the wost thing that would happen
 822                  * the cursor would jump but we should not get protocol
 823                  * de-synchronization.
 824                  */
 825
 826                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
 827                                             false);
 828
 829                 /*
 830                  * Continue with the standard ALPS protocol handling,
 831                  * but make sure we won't process it as an interleaved
 832                  * packet again, which may happen if all buttons are
 833                  * pressed. To avoid this let's reset the 4th bit which
 834                  * is normally 1.
 835                  */
 836                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
 837                 psmouse->pktcnt = 4;
 838         }
 839
 840         return PSMOUSE_GOOD_DATA;
 841 }
 842
 843 static void alps_flush_packet(unsigned long data)
 844 {
 845         struct psmouse *psmouse = (struct psmouse *)data;
 846         struct alps_data *priv = psmouse->private;
 847
 848         serio_pause_rx(psmouse->ps2dev.serio);
 849
 850         if (psmouse->pktcnt == psmouse->pktsize) {
 851
 852                 /*
 853                  * We did not any more data in reasonable amount of time.
 854                  * Validate the last 3 bytes and process as a standard
 855                  * ALPS packet.
 856                  */
 857                 if ((psmouse->packet[3] |
 858                      psmouse->packet[4] |
 859                      psmouse->packet[5]) & 0x80) {
 860                         psmouse_dbg(psmouse,
 861                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
 862                                     psmouse->packet + 3);
 863                 } else {
 864                         priv->process_packet(psmouse);
 865                 }
 866                 psmouse->pktcnt = 0;
 867         }
 868
 869         serio_continue_rx(psmouse->ps2dev.serio);
 870 }
 871
 872 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 873 {
 874         struct alps_data *priv = psmouse->private;
 875
 876         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 877                 if (psmouse->pktcnt == 3) {
 878                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
 879                                                     true);
 880                         return PSMOUSE_FULL_PACKET;
 881                 }
 882                 return PSMOUSE_GOOD_DATA;
 883         }
 884
 885         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
 886
 887         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
 888             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
 889                 return alps_handle_interleaved_ps2(psmouse);
 890         }
 891
 892         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
 893                 psmouse_dbg(psmouse,
 894                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
 895                             psmouse->packet[0], priv->mask0, priv->byte0);
 896                 return PSMOUSE_BAD_DATA;
 897         }
 898
 899         /* Bytes 2 - pktsize should have 0 in the highest bit */
 900         if (priv->proto_version != ALPS_PROTO_V5 &&
 901             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
 902             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
 903                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
 904                             psmouse->pktcnt - 1,
 905                             psmouse->packet[psmouse->pktcnt - 1]);
 906                 return PSMOUSE_BAD_DATA;
 907         }
 908
 909         if (psmouse->pktcnt == psmouse->pktsize) {
 910                 priv->process_packet(psmouse);
 911                 return PSMOUSE_FULL_PACKET;
 912         }
 913
 914         return PSMOUSE_GOOD_DATA;
 915 }
 916
 917 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
 918 {
 919         struct ps2dev *ps2dev = &psmouse->ps2dev;
 920         struct alps_data *priv = psmouse->private;
 921         int command;
 922         unsigned char *param;
 923         unsigned char dummy[4];
 924
 925         BUG_ON(nibble > 0xf);
 926
 927         command = priv->nibble_commands[nibble].command;
 928         param = (command & 0x0f00) ?
 929                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
 930
 931         if (ps2_command(ps2dev, param, command))
 932                 return -1;
 933
 934         return 0;
 935 }
 936
 937 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
 938 {
 939         struct ps2dev *ps2dev = &psmouse->ps2dev;
 940         struct alps_data *priv = psmouse->private;
 941         int i, nibble;
 942
 943         if (ps2_command(ps2dev, NULL, priv->addr_command))
 944                 return -1;
 945
 946         for (i = 12; i >= 0; i -= 4) {
 947                 nibble = (addr >> i) & 0xf;
 948                 if (alps_command_mode_send_nibble(psmouse, nibble))
 949                         return -1;
 950         }
 951
 952         return 0;
 953 }
 954
 955 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
 956 {
 957         struct ps2dev *ps2dev = &psmouse->ps2dev;
 958         unsigned char param[4];
 959
 960         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 961                 return -1;
 962
 963         /*
 964          * The address being read is returned in the first two bytes
 965          * of the result. Check that this address matches the expected
 966          * address.
 967          */
 968         if (addr != ((param[0] << 8) | param[1]))
 969                 return -1;
 970
 971         return param[2];
 972 }
 973
 974 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
 975 {
 976         if (alps_command_mode_set_addr(psmouse, addr))
 977                 return -1;
 978         return __alps_command_mode_read_reg(psmouse, addr);
 979 }
 980
 981 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
 982 {
 983         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
 984                 return -1;
 985         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
 986                 return -1;
 987         return 0;
 988 }
 989
 990 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
 991                                        u8 value)
 992 {
 993         if (alps_command_mode_set_addr(psmouse, addr))
 994                 return -1;
 995         return __alps_command_mode_write_reg(psmouse, value);
 996 }
 997
 998 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
 999                         int repeated_command, unsigned char *param)
1000 {
1001         struct ps2dev *ps2dev = &psmouse->ps2dev;
1002
1003         param[0] = 0;
1004         if (init_command && ps2_command(ps2dev, param, init_command))
1005                 return -EIO;
1006
1007         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1008             ps2_command(ps2dev,  NULL, repeated_command) ||
1009             ps2_command(ps2dev,  NULL, repeated_command))
1010                 return -EIO;
1011
1012         param[0] = param[1] = param[2] = 0xff;
1013         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1014                 return -EIO;
1015
1016         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1017                     repeated_command, param);
1018         return 0;
1019 }
1020
1021 static int alps_enter_command_mode(struct psmouse *psmouse)
1022 {
1023         unsigned char param[4];
1024
1025         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1026                 psmouse_err(psmouse, "failed to enter command mode\n");
1027                 return -1;
1028         }
1029
1030         if ((param[0] != 0x88 || (param[1] != 0x07 && param[1] != 0x08)) &&
1031             param[0] != 0x73) {
1032                 psmouse_dbg(psmouse,
1033                             "unknown response while entering command mode\n");
1034                 return -1;
1035         }
1036         return 0;
1037 }
1038
1039 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1040 {
1041         struct ps2dev *ps2dev = &psmouse->ps2dev;
1042         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1043                 return -1;
1044         return 0;
1045 }
1046
1047 /*
1048  * For DualPoint devices select the device that should respond to
1049  * subsequent commands. It looks like glidepad is behind stickpointer,
1050  * I'd thought it would be other way around...
1051  */
1052 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1053 {
1054         struct ps2dev *ps2dev = &psmouse->ps2dev;
1055         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1056
1057         if (ps2_command(ps2dev, NULL, cmd) ||
1058             ps2_command(ps2dev, NULL, cmd) ||
1059             ps2_command(ps2dev, NULL, cmd) ||
1060             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1061                 return -1;
1062
1063         /* we may get 3 more bytes, just ignore them */
1064         ps2_drain(ps2dev, 3, 100);
1065
1066         return 0;
1067 }
1068
1069 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1070 {
1071         struct ps2dev *ps2dev = &psmouse->ps2dev;
1072
1073         /* Try ALPS magic knock - 4 disable before enable */
1074         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1075             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1076             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1077             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1078             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1079                 return -1;
1080
1081         /*
1082          * Switch mouse to poll (remote) mode so motion data will not
1083          * get in our way
1084          */
1085         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1086 }
1087
1088 static int alps_get_status(struct psmouse *psmouse, char *param)
1089 {
1090         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1091         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1092                 return -1;
1093
1094         return 0;
1095 }
1096
1097 /*
1098  * Turn touchpad tapping on or off. The sequences are:
1099  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1100  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1101  * My guess that 0xE9 (GetInfo) is here as a sync point.
1102  * For models that also have stickpointer (DualPoints) its tapping
1103  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1104  * we don't fiddle with it.
1105  */
1106 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1107 {
1108         struct ps2dev *ps2dev = &psmouse->ps2dev;
1109         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1110         unsigned char tap_arg = enable ? 0x0A : 0x00;
1111         unsigned char param[4];
1112
1113         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1114             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1115             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1116             ps2_command(ps2dev, &tap_arg, cmd))
1117                 return -1;
1118
1119         if (alps_get_status(psmouse, param))
1120                 return -1;
1121
1122         return 0;
1123 }
1124
1125 /*
1126  * alps_poll() - poll the touchpad for current motion packet.
1127  * Used in resync.
1128  */
1129 static int alps_poll(struct psmouse *psmouse)
1130 {
1131         struct alps_data *priv = psmouse->private;
1132         unsigned char buf[sizeof(psmouse->packet)];
1133         bool poll_failed;
1134
1135         if (priv->flags & ALPS_PASS)
1136                 alps_passthrough_mode_v2(psmouse, true);
1137
1138         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1139                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1140
1141         if (priv->flags & ALPS_PASS)
1142                 alps_passthrough_mode_v2(psmouse, false);
1143
1144         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1145                 return -1;
1146
1147         if ((psmouse->badbyte & 0xc8) == 0x08) {
1148 /*
1149  * Poll the track stick ...
1150  */
1151                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1152                         return -1;
1153         }
1154
1155         memcpy(psmouse->packet, buf, sizeof(buf));
1156         return 0;
1157 }
1158
1159 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1160 {
1161         struct alps_data *priv = psmouse->private;
1162
1163         if ((priv->flags & ALPS_PASS) &&
1164             alps_passthrough_mode_v2(psmouse, true)) {
1165                 return -1;
1166         }
1167
1168         if (alps_tap_mode(psmouse, true)) {
1169                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1170                 return -1;
1171         }
1172
1173         if (alps_absolute_mode_v1_v2(psmouse)) {
1174                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1175                 return -1;
1176         }
1177
1178         if ((priv->flags & ALPS_PASS) &&
1179             alps_passthrough_mode_v2(psmouse, false)) {
1180                 return -1;
1181         }
1182
1183         /* ALPS needs stream mode, otherwise it won't report any data */
1184         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1185                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1186                 return -1;
1187         }
1188
1189         return 0;
1190 }
1191
1192 /*
1193  * Enable or disable passthrough mode to the trackstick.
1194  */
1195 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1196                                     int reg_base, bool enable)
1197 {
1198         int reg_val, ret = -1;
1199
1200         if (alps_enter_command_mode(psmouse))
1201                 return -1;
1202
1203         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1204         if (reg_val == -1)
1205                 goto error;
1206
1207         if (enable)
1208                 reg_val |= 0x01;
1209         else
1210                 reg_val &= ~0x01;
1211
1212         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1213
1214 error:
1215         if (alps_exit_command_mode(psmouse))
1216                 ret = -1;
1217         return ret;
1218 }
1219
1220 /* Must be in command mode when calling this function */
1221 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1222 {
1223         int reg_val;
1224
1225         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1226         if (reg_val == -1)
1227                 return -1;
1228
1229         reg_val |= 0x06;
1230         if (__alps_command_mode_write_reg(psmouse, reg_val))
1231                 return -1;
1232
1233         return 0;
1234 }
1235
1236 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
1237 {
1238         int ret = -EIO, reg_val;
1239
1240         if (alps_enter_command_mode(psmouse))
1241                 goto error;
1242
1243         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
1244         if (reg_val == -1)
1245                 goto error;
1246
1247         /* bit 7: trackstick is present */
1248         ret = reg_val & 0x80 ? 0 : -ENODEV;
1249
1250 error:
1251         alps_exit_command_mode(psmouse);
1252         return ret;
1253 }
1254
1255 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
1256 {
1257         struct ps2dev *ps2dev = &psmouse->ps2dev;
1258         int ret = 0;
1259         unsigned char param[4];
1260
1261         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
1262                 return -EIO;
1263
1264         /*
1265          * E7 report for the trackstick
1266          *
1267          * There have been reports of failures to seem to trace back
1268          * to the above trackstick check failing. When these occur
1269          * this E7 report fails, so when that happens we continue
1270          * with the assumption that there isn't a trackstick after
1271          * all.
1272          */
1273         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
1274                 psmouse_warn(psmouse, "trackstick E7 report failed\n");
1275                 ret = -ENODEV;
1276         } else {
1277                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
1278
1279                 /*
1280                  * Not sure what this does, but it is absolutely
1281                  * essential. Without it, the touchpad does not
1282                  * work at all and the trackstick just emits normal
1283                  * PS/2 packets.
1284                  */
1285                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1286                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1287                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1288                     alps_command_mode_send_nibble(psmouse, 0x9) ||
1289                     alps_command_mode_send_nibble(psmouse, 0x4)) {
1290                         psmouse_err(psmouse,
1291                                     "Error sending magic E6 sequence\n");
1292                         ret = -EIO;
1293                         goto error;
1294                 }
1295
1296                 /*
1297                  * This ensures the trackstick packets are in the format
1298                  * supported by this driver. If bit 1 isn't set the packet
1299                  * format is different.
1300                  */
1301                 if (alps_enter_command_mode(psmouse) ||
1302                     alps_command_mode_write_reg(psmouse,
1303                                                 reg_base + 0x08, 0x82) ||
1304                     alps_exit_command_mode(psmouse))
1305                         ret = -EIO;
1306         }
1307
1308 error:
1309         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
1310                 ret = -EIO;
1311
1312         return ret;
1313 }
1314
1315 static int alps_hw_init_v3(struct psmouse *psmouse)
1316 {
1317         struct ps2dev *ps2dev = &psmouse->ps2dev;
1318         int reg_val;
1319         unsigned char param[4];
1320
1321         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
1322         if (reg_val == -EIO)
1323                 goto error;
1324
1325         if (reg_val == 0 &&
1326             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
1327                 goto error;
1328
1329         if (alps_enter_command_mode(psmouse) ||
1330             alps_absolute_mode_v3(psmouse)) {
1331                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1332                 goto error;
1333         }
1334
1335         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1336         if (reg_val == -1)
1337                 goto error;
1338         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1339                 goto error;
1340
1341         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1342         if (reg_val == -1)
1343                 goto error;
1344         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1345                 goto error;
1346
1347         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1348                 goto error;
1349         if (__alps_command_mode_write_reg(psmouse, 0x04))
1350                 goto error;
1351
1352         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1353                 goto error;
1354         if (__alps_command_mode_write_reg(psmouse, 0x03))
1355                 goto error;
1356
1357         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1358                 goto error;
1359         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1360                 goto error;
1361
1362         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1363                 goto error;
1364         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1365                 goto error;
1366
1367         alps_exit_command_mode(psmouse);
1368
1369         /* Set rate and enable data reporting */
1370         param[0] = 0x64;
1371         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1372             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1373                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1374                 return -1;
1375         }
1376
1377         return 0;
1378
1379 error:
1380         /*
1381          * Leaving the touchpad in command mode will essentially render
1382          * it unusable until the machine reboots, so exit it here just
1383          * to be safe
1384          */
1385         alps_exit_command_mode(psmouse);
1386         return -1;
1387 }
1388
1389 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
1390 {
1391         struct alps_data *priv = psmouse->private;
1392         struct ps2dev *ps2dev = &psmouse->ps2dev;
1393         int reg_val, ret = -1;
1394
1395         if (priv->flags & ALPS_DUALPOINT) {
1396                 reg_val = alps_setup_trackstick_v3(psmouse,
1397                                                    ALPS_REG_BASE_RUSHMORE);
1398                 if (reg_val == -EIO)
1399                         goto error;
1400                 if (reg_val == -ENODEV)
1401                         priv->flags &= ~ALPS_DUALPOINT;
1402         }
1403
1404         if (alps_enter_command_mode(psmouse) ||
1405             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
1406             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
1407                 goto error;
1408
1409         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
1410         if (reg_val == -1)
1411                 goto error;
1412         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
1413                 goto error;
1414
1415         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
1416                 goto error;
1417
1418         /* enter absolute mode */
1419         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
1420         if (reg_val == -1)
1421                 goto error;
1422         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
1423                 goto error;
1424
1425         alps_exit_command_mode(psmouse);
1426         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1427
1428 error:
1429         alps_exit_command_mode(psmouse);
1430         return ret;
1431 }
1432
1433 /* Must be in command mode when calling this function */
1434 static int alps_absolute_mode_v4(struct psmouse *psmouse)
1435 {
1436         int reg_val;
1437
1438         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1439         if (reg_val == -1)
1440                 return -1;
1441
1442         reg_val |= 0x02;
1443         if (__alps_command_mode_write_reg(psmouse, reg_val))
1444                 return -1;
1445
1446         return 0;
1447 }
1448
1449 static int alps_hw_init_v4(struct psmouse *psmouse)
1450 {
1451         struct ps2dev *ps2dev = &psmouse->ps2dev;
1452         unsigned char param[4];
1453
1454         if (alps_enter_command_mode(psmouse))
1455                 goto error;
1456
1457         if (alps_absolute_mode_v4(psmouse)) {
1458                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1459                 goto error;
1460         }
1461
1462         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
1463                 goto error;
1464
1465         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
1466                 goto error;
1467
1468         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
1469                 goto error;
1470
1471         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
1472                 goto error;
1473
1474         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
1475                 goto error;
1476
1477         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
1478                 goto error;
1479
1480         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
1481                 goto error;
1482
1483         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
1484                 goto error;
1485
1486         alps_exit_command_mode(psmouse);
1487
1488         /*
1489          * This sequence changes the output from a 9-byte to an
1490          * 8-byte format. All the same data seems to be present,
1491          * just in a more compact format.
1492          */
1493         param[0] = 0xc8;
1494         param[1] = 0x64;
1495         param[2] = 0x50;
1496         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1497             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
1498             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
1499             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1500                 return -1;
1501
1502         /* Set rate and enable data reporting */
1503         param[0] = 0x64;
1504         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1505             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1506                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1507                 return -1;
1508         }
1509
1510         return 0;
1511
1512 error:
1513         /*
1514          * Leaving the touchpad in command mode will essentially render
1515          * it unusable until the machine reboots, so exit it here just
1516          * to be safe
1517          */
1518         alps_exit_command_mode(psmouse);
1519         return -1;
1520 }
1521
1522 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
1523 {
1524         struct ps2dev *ps2dev = &psmouse->ps2dev;
1525         unsigned char param[2];
1526
1527         /* This is dolphin "v1" as empirically defined by florin9doi */
1528         param[0] = 0x64;
1529         param[1] = 0x28;
1530
1531         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
1532             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1533             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1534                 return -1;
1535
1536         return 0;
1537 }
1538
1539 static void alps_set_defaults(struct alps_data *priv)
1540 {
1541         priv->byte0 = 0x8f;
1542         priv->mask0 = 0x8f;
1543         priv->flags = ALPS_DUALPOINT;
1544
1545         priv->x_max = 2000;
1546         priv->y_max = 1400;
1547         priv->x_bits = 15;
1548         priv->y_bits = 11;
1549
1550         switch (priv->proto_version) {
1551         case ALPS_PROTO_V1:
1552         case ALPS_PROTO_V2:
1553                 priv->hw_init = alps_hw_init_v1_v2;
1554                 priv->process_packet = alps_process_packet_v1_v2;
1555                 priv->set_abs_params = alps_set_abs_params_st;
1556                 break;
1557         case ALPS_PROTO_V3:
1558                 priv->hw_init = alps_hw_init_v3;
1559                 priv->process_packet = alps_process_packet_v3;
1560                 priv->set_abs_params = alps_set_abs_params_mt;
1561                 priv->decode_fields = alps_decode_pinnacle;
1562                 priv->nibble_commands = alps_v3_nibble_commands;
1563                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
1564                 break;
1565         case ALPS_PROTO_V4:
1566                 priv->hw_init = alps_hw_init_v4;
1567                 priv->process_packet = alps_process_packet_v4;
1568                 priv->set_abs_params = alps_set_abs_params_mt;
1569                 priv->nibble_commands = alps_v4_nibble_commands;
1570                 priv->addr_command = PSMOUSE_CMD_DISABLE;
1571                 break;
1572         case ALPS_PROTO_V5:
1573                 priv->hw_init = alps_hw_init_dolphin_v1;
1574                 priv->process_packet = alps_process_packet_v3;
1575                 priv->decode_fields = alps_decode_dolphin;
1576                 priv->set_abs_params = alps_set_abs_params_mt;
1577                 priv->nibble_commands = alps_v3_nibble_commands;
1578                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
1579                 priv->byte0 = 0xc8;
1580                 priv->mask0 = 0xc8;
1581                 priv->flags = 0;
1582                 priv->x_max = 1360;
1583                 priv->y_max = 660;
1584                 priv->x_bits = 23;
1585                 priv->y_bits = 12;
1586                 break;
1587         }
1588 }
1589
1590 static int alps_match_table(struct psmouse *psmouse, struct alps_data *priv,
1591                             unsigned char *e7, unsigned char *ec)
1592 {
1593         const struct alps_model_info *model;
1594         int i;
1595
1596         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
1597                 model = &alps_model_data[i];
1598
1599                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
1600                     (!model->command_mode_resp ||
1601                      model->command_mode_resp == ec[2])) {
1602
1603                         priv->proto_version = model->proto_version;
1604                         alps_set_defaults(priv);
1605
1606                         priv->flags = model->flags;
1607                         priv->byte0 = model->byte0;
1608                         priv->mask0 = model->mask0;
1609
1610                         return 0;
1611                 }
1612         }
1613
1614         return -EINVAL;
1615 }
1616
1617 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
1618 {
1619         unsigned char e6[4], e7[4], ec[4];
1620
1621         /*
1622          * First try "E6 report".
1623          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
1624          * The bits 0-2 of the first byte will be 1s if some buttons are
1625          * pressed.
1626          */
1627         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
1628                          PSMOUSE_CMD_SETSCALE11, e6))
1629                 return -EIO;
1630
1631         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
1632                 return -EINVAL;
1633
1634         /*
1635          * Now get the "E7" and "EC" reports.  These will uniquely identify
1636          * most ALPS touchpads.
1637          */
1638         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
1639                          PSMOUSE_CMD_SETSCALE21, e7) ||
1640             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
1641                          PSMOUSE_CMD_RESET_WRAP, ec) ||
1642             alps_exit_command_mode(psmouse))
1643                 return -EIO;
1644
1645         if (alps_match_table(psmouse, priv, e7, ec) == 0) {
1646                 return 0;
1647         } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
1648                    ec[0] == 0x73 && ec[1] == 0x01) {
1649                 priv->proto_version = ALPS_PROTO_V5;
1650                 alps_set_defaults(priv);
1651
1652                 return 0;
1653         } else if (ec[0] == 0x88 && ec[1] == 0x08) {
1654                 priv->proto_version = ALPS_PROTO_V3;
1655                 alps_set_defaults(priv);
1656
1657                 priv->hw_init = alps_hw_init_rushmore_v3;
1658                 priv->decode_fields = alps_decode_rushmore;
1659                 priv->x_bits = 16;
1660                 priv->y_bits = 12;
1661
1662                 /* hack to make addr_command, nibble_command available */
1663                 psmouse->private = priv;
1664
1665                 if (alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_RUSHMORE))
1666                         priv->flags &= ~ALPS_DUALPOINT;
1667
1668                 return 0;
1669         } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
1670                    ec[2] >= 0x90 && ec[2] <= 0x9d) {
1671                 priv->proto_version = ALPS_PROTO_V3;
1672                 alps_set_defaults(priv);
1673
1674                 return 0;
1675         }
1676
1677         psmouse_info(psmouse,
1678                      "Unknown ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
1679
1680         return -EINVAL;
1681 }
1682
1683 static int alps_reconnect(struct psmouse *psmouse)
1684 {
1685         struct alps_data *priv = psmouse->private;
1686
1687         psmouse_reset(psmouse);
1688
1689         if (alps_identify(psmouse, priv) < 0)
1690                 return -1;
1691
1692         return priv->hw_init(psmouse);
1693 }
1694
1695 static void alps_disconnect(struct psmouse *psmouse)
1696 {
1697         struct alps_data *priv = psmouse->private;
1698
1699         psmouse_reset(psmouse);
1700         del_timer_sync(&priv->timer);
1701         input_unregister_device(priv->dev2);
1702         kfree(priv);
1703 }
1704
1705 static void alps_set_abs_params_st(struct alps_data *priv,
1706                                    struct input_dev *dev1)
1707 {
1708         input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
1709         input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
1710 }
1711
1712 static void alps_set_abs_params_mt(struct alps_data *priv,
1713                                    struct input_dev *dev1)
1714 {
1715         set_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
1716         input_mt_init_slots(dev1, 2, 0);
1717         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
1718         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
1719
1720         set_bit(BTN_TOOL_DOUBLETAP, dev1->keybit);
1721         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
1722         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
1723
1724         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
1725         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
1726 }
1727
1728 int alps_init(struct psmouse *psmouse)
1729 {
1730         struct alps_data *priv;
1731         struct input_dev *dev1 = psmouse->dev, *dev2;
1732
1733         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
1734         dev2 = input_allocate_device();
1735         if (!priv || !dev2)
1736                 goto init_fail;
1737
1738         priv->dev2 = dev2;
1739         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
1740
1741         psmouse->private = priv;
1742
1743         psmouse_reset(psmouse);
1744
1745         if (alps_identify(psmouse, priv) < 0)
1746                 goto init_fail;
1747
1748         if (priv->hw_init(psmouse))
1749                 goto init_fail;
1750
1751         /*
1752          * Undo part of setup done for us by psmouse core since touchpad
1753          * is not a relative device.
1754          */
1755         __clear_bit(EV_REL, dev1->evbit);
1756         __clear_bit(REL_X, dev1->relbit);
1757         __clear_bit(REL_Y, dev1->relbit);
1758
1759         /*
1760          * Now set up our capabilities.
1761          */
1762         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
1763         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
1764         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
1765         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
1766                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1767
1768         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
1769
1770         priv->set_abs_params(priv, dev1);
1771         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
1772
1773         if (priv->flags & ALPS_WHEEL) {
1774                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
1775                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
1776         }
1777
1778         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
1779                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
1780                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
1781         }
1782
1783         if (priv->flags & ALPS_FOUR_BUTTONS) {
1784                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
1785                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
1786                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
1787                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
1788         } else {
1789                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
1790         }
1791
1792         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
1793         dev2->phys = priv->phys;
1794         dev2->name = (priv->flags & ALPS_DUALPOINT) ?
1795                      "DualPoint Stick" : "ALPS PS/2 Device";
1796         dev2->id.bustype = BUS_I8042;
1797         dev2->id.vendor  = 0x0002;
1798         dev2->id.product = PSMOUSE_ALPS;
1799         dev2->id.version = 0x0000;
1800         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
1801
1802         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
1803         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
1804         dev2->keybit[BIT_WORD(BTN_LEFT)] =
1805                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
1806
1807         if (input_register_device(priv->dev2))
1808                 goto init_fail;
1809
1810         psmouse->protocol_handler = alps_process_byte;
1811         psmouse->poll = alps_poll;
1812         psmouse->disconnect = alps_disconnect;
1813         psmouse->reconnect = alps_reconnect;
1814         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
1815
1816         /* We are having trouble resyncing ALPS touchpads so disable it for now */
1817         psmouse->resync_time = 0;
1818
1819         return 0;
1820
1821 init_fail:
1822         psmouse_reset(psmouse);
1823         input_free_device(dev2);
1824         kfree(priv);
1825         psmouse->private = NULL;
1826         return -1;
1827 }
1828
1829 int alps_detect(struct psmouse *psmouse, bool set_properties)
1830 {
1831         struct alps_data dummy;
1832
1833         if (alps_identify(psmouse, &dummy) < 0)
1834                 return -1;
1835
1836         if (set_properties) {
1837                 psmouse->vendor = "ALPS";
1838                 psmouse->name = dummy.flags & ALPS_DUALPOINT ?
1839                                 "DualPoint TouchPad" : "GlidePoint";
1840                 psmouse->model = dummy.proto_version << 8;
1841         }
1842         return 0;
1843 }
1844