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 static const struct alps_nibble_commands alps_v6_nibble_commands[] = {
  74         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
  75         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 1 */
  76         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 2 */
  77         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 3 */
  78         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 4 */
  79         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 5 */
  80         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 6 */
  81         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 7 */
  82         { PSMOUSE_CMD_GETID,            0x00 }, /* 8 */
  83         { PSMOUSE_CMD_GETINFO,          0x00 }, /* 9 */
  84         { PSMOUSE_CMD_SETRES,           0x00 }, /* a */
  85         { PSMOUSE_CMD_SETRES,           0x01 }, /* b */
  86         { PSMOUSE_CMD_SETRES,           0x02 }, /* c */
  87         { PSMOUSE_CMD_SETRES,           0x03 }, /* d */
  88         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* e */
  89         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  90 };
  91
  92
  93 #define ALPS_DUALPOINT          0x02    /* touchpad has trackstick */
  94 #define ALPS_PASS               0x04    /* device has a pass-through port */
  95
  96 #define ALPS_WHEEL              0x08    /* hardware wheel present */
  97 #define ALPS_FW_BK_1            0x10    /* front & back buttons present */
  98 #define ALPS_FW_BK_2            0x20    /* front & back buttons present */
  99 #define ALPS_FOUR_BUTTONS       0x40    /* 4 direction button present */
 100 #define ALPS_PS2_INTERLEAVED    0x80    /* 3-byte PS/2 packet interleaved with
 101                                            6-byte ALPS packet */
 102 #define ALPS_BUTTONPAD          0x200   /* device is a clickpad */
 103
 104 static const struct alps_model_info alps_model_data[] = {
 105         { { 0x32, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Toshiba Salellite Pro M10 */
 106         { { 0x33, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } },                               /* UMAX-530T */
 107         { { 0x53, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 108         { { 0x53, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 109         { { 0x60, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },                               /* HP ze1115 */
 110         { { 0x63, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 111         { { 0x63, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 112         { { 0x63, 0x02, 0x28 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Fujitsu Siemens S6010 */
 113         { { 0x63, 0x02, 0x3c }, 0x00, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } },              /* Toshiba Satellite S2400-103 */
 114         { { 0x63, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } },            /* NEC Versa L320 */
 115         { { 0x63, 0x02, 0x64 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 116         { { 0x63, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D800 */
 117         { { 0x73, 0x00, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } },          /* ThinkPad R61 8918-5QG */
 118         { { 0x73, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 119         { { 0x73, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Ahtec Laptop */
 120
 121         /*
 122          * XXX This entry is suspicious. First byte has zero lower nibble,
 123          * which is what a normal mouse would report. Also, the value 0x0e
 124          * isn't valid per PS/2 spec.
 125          */
 126         { { 0x20, 0x02, 0x0e }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 127
 128         { { 0x22, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 129         { { 0x22, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D600 */
 130         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
 131         { { 0x62, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf,
 132                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },
 133         { { 0x73, 0x00, 0x14 }, 0x00, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } },          /* Dell XT2 */
 134         { { 0x73, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } },       /* Dell Vostro 1400 */
 135         { { 0x52, 0x01, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff,
 136                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },                          /* Toshiba Tecra A11-11L */
 137         { { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } },
 138 };
 139
 140 static const struct alps_protocol_info alps_v3_protocol_data = {
 141         ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT
 142 };
 143
 144 static const struct alps_protocol_info alps_v3_rushmore_data = {
 145         ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT
 146 };
 147
 148 static const struct alps_protocol_info alps_v5_protocol_data = {
 149         ALPS_PROTO_V5, 0xc8, 0xd8, 0
 150 };
 151
 152 static const struct alps_protocol_info alps_v7_protocol_data = {
 153         ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
 154 };
 155
 156 static void alps_set_abs_params_st(struct alps_data *priv,
 157                                    struct input_dev *dev1);
 158 static void alps_set_abs_params_mt(struct alps_data *priv,
 159                                    struct input_dev *dev1);
 160
 161 /* Packet formats are described in Documentation/input/alps.txt */
 162
 163 static bool alps_is_valid_first_byte(struct alps_data *priv,
 164                                      unsigned char data)
 165 {
 166         return (data & priv->mask0) == priv->byte0;
 167 }
 168
 169 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
 170                                 int left, int right, int middle)
 171 {
 172         struct input_dev *dev;
 173
 174         /*
 175          * If shared button has already been reported on the
 176          * other device (dev2) then this event should be also
 177          * sent through that device.
 178          */
 179         dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
 180         input_report_key(dev, BTN_LEFT, left);
 181
 182         dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
 183         input_report_key(dev, BTN_RIGHT, right);
 184
 185         dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
 186         input_report_key(dev, BTN_MIDDLE, middle);
 187
 188         /*
 189          * Sync the _other_ device now, we'll do the first
 190          * device later once we report the rest of the events.
 191          */
 192         if (dev2)
 193                 input_sync(dev2);
 194 }
 195
 196 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
 197 {
 198         struct alps_data *priv = psmouse->private;
 199         unsigned char *packet = psmouse->packet;
 200         struct input_dev *dev = psmouse->dev;
 201         struct input_dev *dev2 = priv->dev2;
 202         int x, y, z, ges, fin, left, right, middle;
 203         int back = 0, forward = 0;
 204
 205         if (priv->proto_version == ALPS_PROTO_V1) {
 206                 left = packet[2] & 0x10;
 207                 right = packet[2] & 0x08;
 208                 middle = 0;
 209                 x = packet[1] | ((packet[0] & 0x07) << 7);
 210                 y = packet[4] | ((packet[3] & 0x07) << 7);
 211                 z = packet[5];
 212         } else {
 213                 left = packet[3] & 1;
 214                 right = packet[3] & 2;
 215                 middle = packet[3] & 4;
 216                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 217                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 218                 z = packet[5];
 219         }
 220
 221         if (priv->flags & ALPS_FW_BK_1) {
 222                 back = packet[0] & 0x10;
 223                 forward = packet[2] & 4;
 224         }
 225
 226         if (priv->flags & ALPS_FW_BK_2) {
 227                 back = packet[3] & 4;
 228                 forward = packet[2] & 4;
 229                 if ((middle = forward && back))
 230                         forward = back = 0;
 231         }
 232
 233         ges = packet[2] & 1;
 234         fin = packet[2] & 2;
 235
 236         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
 237                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 238                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 239
 240                 alps_report_buttons(dev2, dev, left, right, middle);
 241
 242                 input_sync(dev2);
 243                 return;
 244         }
 245
 246         /* Non interleaved V2 dualpoint has separate stick button bits */
 247         if (priv->proto_version == ALPS_PROTO_V2 &&
 248             priv->flags == (ALPS_PASS | ALPS_DUALPOINT)) {
 249                 left |= packet[0] & 1;
 250                 right |= packet[0] & 2;
 251                 middle |= packet[0] & 4;
 252         }
 253
 254         alps_report_buttons(dev, dev2, left, right, middle);
 255
 256         /* Convert hardware tap to a reasonable Z value */
 257         if (ges && !fin)
 258                 z = 40;
 259
 260         /*
 261          * A "tap and drag" operation is reported by the hardware as a transition
 262          * from (!fin && ges) to (fin && ges). This should be translated to the
 263          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 264          */
 265         if (ges && fin && !priv->prev_fin) {
 266                 input_report_abs(dev, ABS_X, x);
 267                 input_report_abs(dev, ABS_Y, y);
 268                 input_report_abs(dev, ABS_PRESSURE, 0);
 269                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 270                 input_sync(dev);
 271         }
 272         priv->prev_fin = fin;
 273
 274         if (z > 30)
 275                 input_report_key(dev, BTN_TOUCH, 1);
 276         if (z < 25)
 277                 input_report_key(dev, BTN_TOUCH, 0);
 278
 279         if (z > 0) {
 280                 input_report_abs(dev, ABS_X, x);
 281                 input_report_abs(dev, ABS_Y, y);
 282         }
 283
 284         input_report_abs(dev, ABS_PRESSURE, z);
 285         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 286
 287         if (priv->flags & ALPS_WHEEL)
 288                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 289
 290         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 291                 input_report_key(dev, BTN_FORWARD, forward);
 292                 input_report_key(dev, BTN_BACK, back);
 293         }
 294
 295         if (priv->flags & ALPS_FOUR_BUTTONS) {
 296                 input_report_key(dev, BTN_0, packet[2] & 4);
 297                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 298                 input_report_key(dev, BTN_2, packet[3] & 4);
 299                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 300         }
 301
 302         input_sync(dev);
 303 }
 304
 305 /*
 306  * Process bitmap data for V5 protocols. Return value is null.
 307  *
 308  * The bitmaps don't have enough data to track fingers, so this function
 309  * only generates points representing a bounding box of at most two contacts.
 310  * These two points are returned in fields->mt.
 311  */
 312 static void alps_process_bitmap_dolphin(struct alps_data *priv,
 313                                         struct alps_fields *fields)
 314 {
 315         int box_middle_x, box_middle_y;
 316         unsigned int x_map, y_map;
 317         unsigned char start_bit, end_bit;
 318         unsigned char x_msb, x_lsb, y_msb, y_lsb;
 319
 320         x_map = fields->x_map;
 321         y_map = fields->y_map;
 322
 323         if (!x_map || !y_map)
 324                 return;
 325
 326         /* Get Most-significant and Least-significant bit */
 327         x_msb = fls(x_map);
 328         x_lsb = ffs(x_map);
 329         y_msb = fls(y_map);
 330         y_lsb = ffs(y_map);
 331
 332         /* Most-significant bit should never exceed max sensor line number */
 333         if (x_msb > priv->x_bits || y_msb > priv->y_bits)
 334                 return;
 335
 336         if (fields->fingers > 1) {
 337                 start_bit = priv->x_bits - x_msb;
 338                 end_bit = priv->x_bits - x_lsb;
 339                 box_middle_x = (priv->x_max * (start_bit + end_bit)) /
 340                                 (2 * (priv->x_bits - 1));
 341
 342                 start_bit = y_lsb - 1;
 343                 end_bit = y_msb - 1;
 344                 box_middle_y = (priv->y_max * (start_bit + end_bit)) /
 345                                 (2 * (priv->y_bits - 1));
 346                 fields->mt[0] = fields->st;
 347                 fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
 348                 fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
 349         }
 350 }
 351
 352 static void alps_get_bitmap_points(unsigned int map,
 353                                    struct alps_bitmap_point *low,
 354                                    struct alps_bitmap_point *high,
 355                                    int *fingers)
 356 {
 357         struct alps_bitmap_point *point;
 358         int i, bit, prev_bit = 0;
 359
 360         point = low;
 361         for (i = 0; map != 0; i++, map >>= 1) {
 362                 bit = map & 1;
 363                 if (bit) {
 364                         if (!prev_bit) {
 365                                 point->start_bit = i;
 366                                 point->num_bits = 0;
 367                                 (*fingers)++;
 368                         }
 369                         point->num_bits++;
 370                 } else {
 371                         if (prev_bit)
 372                                 point = high;
 373                 }
 374                 prev_bit = bit;
 375         }
 376 }
 377
 378 /*
 379  * Process bitmap data from v3 and v4 protocols. Returns the number of
 380  * fingers detected. A return value of 0 means at least one of the
 381  * bitmaps was empty.
 382  *
 383  * The bitmaps don't have enough data to track fingers, so this function
 384  * only generates points representing a bounding box of all contacts.
 385  * These points are returned in fields->mt when the return value
 386  * is greater than 0.
 387  */
 388 static int alps_process_bitmap(struct alps_data *priv,
 389                                struct alps_fields *fields)
 390 {
 391         int i, fingers_x = 0, fingers_y = 0, fingers;
 392         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 393         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 394
 395         if (!fields->x_map || !fields->y_map)
 396                 return 0;
 397
 398         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
 399         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
 400
 401         /*
 402          * Fingers can overlap, so we use the maximum count of fingers
 403          * on either axis as the finger count.
 404          */
 405         fingers = max(fingers_x, fingers_y);
 406
 407         /*
 408          * If an axis reports only a single contact, we have overlapping or
 409          * adjacent fingers. Divide the single contact between the two points.
 410          */
 411         if (fingers_x == 1) {
 412                 i = (x_low.num_bits - 1) / 2;
 413                 x_low.num_bits = x_low.num_bits - i;
 414                 x_high.start_bit = x_low.start_bit + i;
 415                 x_high.num_bits = max(i, 1);
 416         }
 417         if (fingers_y == 1) {
 418                 i = (y_low.num_bits - 1) / 2;
 419                 y_low.num_bits = y_low.num_bits - i;
 420                 y_high.start_bit = y_low.start_bit + i;
 421                 y_high.num_bits = max(i, 1);
 422         }
 423
 424         fields->mt[0].x =
 425                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 426                 (2 * (priv->x_bits - 1));
 427         fields->mt[0].y =
 428                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 429                 (2 * (priv->y_bits - 1));
 430
 431         fields->mt[1].x =
 432                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 433                 (2 * (priv->x_bits - 1));
 434         fields->mt[1].y =
 435                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 436                 (2 * (priv->y_bits - 1));
 437
 438         /* y-bitmap order is reversed, except on rushmore */
 439         if (priv->proto_version != ALPS_PROTO_V3_RUSHMORE) {
 440                 fields->mt[0].y = priv->y_max - fields->mt[0].y;
 441                 fields->mt[1].y = priv->y_max - fields->mt[1].y;
 442         }
 443
 444         return fingers;
 445 }
 446
 447 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
 448 {
 449         input_mt_slot(dev, slot);
 450         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 451         input_report_abs(dev, ABS_MT_POSITION_X, x);
 452         input_report_abs(dev, ABS_MT_POSITION_Y, y);
 453 }
 454
 455 static void alps_report_mt_data(struct psmouse *psmouse, int n)
 456 {
 457         struct alps_data *priv = psmouse->private;
 458         struct input_dev *dev = psmouse->dev;
 459         struct alps_fields *f = &priv->f;
 460         int i, slot[MAX_TOUCHES];
 461
 462         input_mt_assign_slots(dev, slot, f->mt, n, 0);
 463         for (i = 0; i < n; i++)
 464                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
 465
 466         input_mt_sync_frame(dev);
 467 }
 468
 469 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
 470 {
 471         struct alps_data *priv = psmouse->private;
 472         struct input_dev *dev = psmouse->dev;
 473         struct alps_fields *f = &priv->f;
 474
 475         /* Use st data when we don't have mt data */
 476         if (fingers < 2) {
 477                 f->mt[0].x = f->st.x;
 478                 f->mt[0].y = f->st.y;
 479                 fingers = f->pressure > 0 ? 1 : 0;
 480         }
 481
 482         alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
 483
 484         input_mt_report_finger_count(dev, fingers);
 485
 486         input_report_key(dev, BTN_LEFT, f->left);
 487         input_report_key(dev, BTN_RIGHT, f->right);
 488         input_report_key(dev, BTN_MIDDLE, f->middle);
 489
 490         input_report_abs(dev, ABS_PRESSURE, f->pressure);
 491
 492         input_sync(dev);
 493 }
 494
 495 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 496 {
 497         struct alps_data *priv = psmouse->private;
 498         unsigned char *packet = psmouse->packet;
 499         struct input_dev *dev = priv->dev2;
 500         int x, y, z, left, right, middle;
 501
 502         /* It should be a DualPoint when received trackstick packet */
 503         if (!(priv->flags & ALPS_DUALPOINT)) {
 504                 psmouse_warn(psmouse,
 505                              "Rejected trackstick packet from non DualPoint device");
 506                 return;
 507         }
 508
 509         /* Sanity check packet */
 510         if (!(packet[0] & 0x40)) {
 511                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 512                 return;
 513         }
 514
 515         /*
 516          * There's a special packet that seems to indicate the end
 517          * of a stream of trackstick data. Filter these out.
 518          */
 519         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 520                 return;
 521
 522         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 523         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 524         z = (packet[4] & 0x7c) >> 2;
 525
 526         /*
 527          * The x and y values tend to be quite large, and when used
 528          * alone the trackstick is difficult to use. Scale them down
 529          * to compensate.
 530          */
 531         x /= 8;
 532         y /= 8;
 533
 534         input_report_rel(dev, REL_X, x);
 535         input_report_rel(dev, REL_Y, -y);
 536
 537         /*
 538          * Most ALPS models report the trackstick buttons in the touchpad
 539          * packets, but a few report them here. No reliable way has been
 540          * found to differentiate between the models upfront, so we enable
 541          * the quirk in response to seeing a button press in the trackstick
 542          * packet.
 543          */
 544         left = packet[3] & 0x01;
 545         right = packet[3] & 0x02;
 546         middle = packet[3] & 0x04;
 547
 548         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 549             (left || right || middle))
 550                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 551
 552         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 553                 input_report_key(dev, BTN_LEFT, left);
 554                 input_report_key(dev, BTN_RIGHT, right);
 555                 input_report_key(dev, BTN_MIDDLE, middle);
 556         }
 557
 558         input_sync(dev);
 559         return;
 560 }
 561
 562 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 563 {
 564         f->left = !!(p[3] & 0x01);
 565         f->right = !!(p[3] & 0x02);
 566         f->middle = !!(p[3] & 0x04);
 567
 568         f->ts_left = !!(p[3] & 0x10);
 569         f->ts_right = !!(p[3] & 0x20);
 570         f->ts_middle = !!(p[3] & 0x40);
 571 }
 572
 573 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 574                                  struct psmouse *psmouse)
 575 {
 576         f->first_mp = !!(p[4] & 0x40);
 577         f->is_mp = !!(p[0] & 0x40);
 578
 579         f->fingers = (p[5] & 0x3) + 1;
 580         f->x_map = ((p[4] & 0x7e) << 8) |
 581                    ((p[1] & 0x7f) << 2) |
 582                    ((p[0] & 0x30) >> 4);
 583         f->y_map = ((p[3] & 0x70) << 4) |
 584                    ((p[2] & 0x7f) << 1) |
 585                    (p[4] & 0x01);
 586
 587         f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 588                ((p[0] & 0x30) >> 4);
 589         f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 590         f->pressure = p[5] & 0x7f;
 591
 592         alps_decode_buttons_v3(f, p);
 593
 594         return 0;
 595 }
 596
 597 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 598                                  struct psmouse *psmouse)
 599 {
 600         alps_decode_pinnacle(f, p, psmouse);
 601
 602         /* Rushmore's packet decode has a bit difference with Pinnacle's */
 603         f->is_mp = !!(p[5] & 0x40);
 604         f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
 605         f->x_map |= (p[5] & 0x10) << 11;
 606         f->y_map |= (p[5] & 0x20) << 6;
 607
 608         return 0;
 609 }
 610
 611 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 612                                 struct psmouse *psmouse)
 613 {
 614         u64 palm_data = 0;
 615         struct alps_data *priv = psmouse->private;
 616
 617         f->first_mp = !!(p[0] & 0x02);
 618         f->is_mp = !!(p[0] & 0x20);
 619
 620         if (!f->is_mp) {
 621                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 622                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 623                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
 624                 alps_decode_buttons_v3(f, p);
 625         } else {
 626                 f->fingers = ((p[0] & 0x6) >> 1 |
 627                      (p[0] & 0x10) >> 2);
 628
 629                 palm_data = (p[1] & 0x7f) |
 630                             ((p[2] & 0x7f) << 7) |
 631                             ((p[4] & 0x7f) << 14) |
 632                             ((p[5] & 0x7f) << 21) |
 633                             ((p[3] & 0x07) << 28) |
 634                             (((u64)p[3] & 0x70) << 27) |
 635                             (((u64)p[0] & 0x01) << 34);
 636
 637                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
 638                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
 639
 640                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
 641                 f->x_map = (palm_data >> priv->y_bits) &
 642                            (BIT(priv->x_bits) - 1);
 643         }
 644
 645         return 0;
 646 }
 647
 648 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 649 {
 650         struct alps_data *priv = psmouse->private;
 651         unsigned char *packet = psmouse->packet;
 652         struct input_dev *dev2 = priv->dev2;
 653         struct alps_fields *f = &priv->f;
 654         int fingers = 0;
 655
 656         memset(f, 0, sizeof(*f));
 657
 658         priv->decode_fields(f, packet, psmouse);
 659
 660         /*
 661          * There's no single feature of touchpad position and bitmap packets
 662          * that can be used to distinguish between them. We rely on the fact
 663          * that a bitmap packet should always follow a position packet with
 664          * bit 6 of packet[4] set.
 665          */
 666         if (priv->multi_packet) {
 667                 /*
 668                  * Sometimes a position packet will indicate a multi-packet
 669                  * sequence, but then what follows is another position
 670                  * packet. Check for this, and when it happens process the
 671                  * position packet as usual.
 672                  */
 673                 if (f->is_mp) {
 674                         fingers = f->fingers;
 675                         if (priv->proto_version == ALPS_PROTO_V3 ||
 676                             priv->proto_version == ALPS_PROTO_V3_RUSHMORE) {
 677                                 if (alps_process_bitmap(priv, f) == 0)
 678                                         fingers = 0; /* Use st data */
 679
 680                                 /* Now process position packet */
 681                                 priv->decode_fields(f, priv->multi_data,
 682                                                     psmouse);
 683                         } else {
 684                                 /*
 685                                  * Because Dolphin uses position packet's
 686                                  * coordinate data as Pt1 and uses it to
 687                                  * calculate Pt2, so we need to do position
 688                                  * packet decode first.
 689                                  */
 690                                 priv->decode_fields(f, priv->multi_data,
 691                                                     psmouse);
 692
 693                                 /*
 694                                  * Since Dolphin's finger number is reliable,
 695                                  * there is no need to compare with bmap_fn.
 696                                  */
 697                                 alps_process_bitmap_dolphin(priv, f);
 698                         }
 699                 } else {
 700                         priv->multi_packet = 0;
 701                 }
 702         }
 703
 704         /*
 705          * Bit 6 of byte 0 is not usually set in position packets. The only
 706          * times it seems to be set is in situations where the data is
 707          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 708          * this combined with the fact that this bit is useful for filtering
 709          * out misidentified bitmap packets, we reject anything with this
 710          * bit set.
 711          */
 712         if (f->is_mp)
 713                 return;
 714
 715         if (!priv->multi_packet && f->first_mp) {
 716                 priv->multi_packet = 1;
 717                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 718                 return;
 719         }
 720
 721         priv->multi_packet = 0;
 722
 723         /*
 724          * Sometimes the hardware sends a single packet with z = 0
 725          * in the middle of a stream. Real releases generate packets
 726          * with x, y, and z all zero, so these seem to be flukes.
 727          * Ignore them.
 728          */
 729         if (f->st.x && f->st.y && !f->pressure)
 730                 return;
 731
 732         alps_report_semi_mt_data(psmouse, fingers);
 733
 734         if ((priv->flags & ALPS_DUALPOINT) &&
 735             !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 736                 input_report_key(dev2, BTN_LEFT, f->ts_left);
 737                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
 738                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
 739                 input_sync(dev2);
 740         }
 741 }
 742
 743 static void alps_process_packet_v3(struct psmouse *psmouse)
 744 {
 745         unsigned char *packet = psmouse->packet;
 746
 747         /*
 748          * v3 protocol packets come in three types, two representing
 749          * touchpad data and one representing trackstick data.
 750          * Trackstick packets seem to be distinguished by always
 751          * having 0x3f in the last byte. This value has never been
 752          * observed in the last byte of either of the other types
 753          * of packets.
 754          */
 755         if (packet[5] == 0x3f) {
 756                 alps_process_trackstick_packet_v3(psmouse);
 757                 return;
 758         }
 759
 760         alps_process_touchpad_packet_v3_v5(psmouse);
 761 }
 762
 763 static void alps_process_packet_v6(struct psmouse *psmouse)
 764 {
 765         struct alps_data *priv = psmouse->private;
 766         unsigned char *packet = psmouse->packet;
 767         struct input_dev *dev = psmouse->dev;
 768         struct input_dev *dev2 = priv->dev2;
 769         int x, y, z, left, right, middle;
 770
 771         /*
 772          * We can use Byte5 to distinguish if the packet is from Touchpad
 773          * or Trackpoint.
 774          * Touchpad:    0 - 0x7E
 775          * Trackpoint:  0x7F
 776          */
 777         if (packet[5] == 0x7F) {
 778                 /* It should be a DualPoint when received Trackpoint packet */
 779                 if (!(priv->flags & ALPS_DUALPOINT)) {
 780                         psmouse_warn(psmouse,
 781                                      "Rejected trackstick packet from non DualPoint device");
 782                         return;
 783                 }
 784
 785                 /* Trackpoint packet */
 786                 x = packet[1] | ((packet[3] & 0x20) << 2);
 787                 y = packet[2] | ((packet[3] & 0x40) << 1);
 788                 z = packet[4];
 789                 left = packet[3] & 0x01;
 790                 right = packet[3] & 0x02;
 791                 middle = packet[3] & 0x04;
 792
 793                 /* To prevent the cursor jump when finger lifted */
 794                 if (x == 0x7F && y == 0x7F && z == 0x7F)
 795                         x = y = z = 0;
 796
 797                 /* Divide 4 since trackpoint's speed is too fast */
 798                 input_report_rel(dev2, REL_X, (char)x / 4);
 799                 input_report_rel(dev2, REL_Y, -((char)y / 4));
 800
 801                 input_report_key(dev2, BTN_LEFT, left);
 802                 input_report_key(dev2, BTN_RIGHT, right);
 803                 input_report_key(dev2, BTN_MIDDLE, middle);
 804
 805                 input_sync(dev2);
 806                 return;
 807         }
 808
 809         /* Touchpad packet */
 810         x = packet[1] | ((packet[3] & 0x78) << 4);
 811         y = packet[2] | ((packet[4] & 0x78) << 4);
 812         z = packet[5];
 813         left = packet[3] & 0x01;
 814         right = packet[3] & 0x02;
 815
 816         if (z > 30)
 817                 input_report_key(dev, BTN_TOUCH, 1);
 818         if (z < 25)
 819                 input_report_key(dev, BTN_TOUCH, 0);
 820
 821         if (z > 0) {
 822                 input_report_abs(dev, ABS_X, x);
 823                 input_report_abs(dev, ABS_Y, y);
 824         }
 825
 826         input_report_abs(dev, ABS_PRESSURE, z);
 827         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 828
 829         /* v6 touchpad does not have middle button */
 830         input_report_key(dev, BTN_LEFT, left);
 831         input_report_key(dev, BTN_RIGHT, right);
 832
 833         input_sync(dev);
 834 }
 835
 836 static void alps_process_packet_v4(struct psmouse *psmouse)
 837 {
 838         struct alps_data *priv = psmouse->private;
 839         unsigned char *packet = psmouse->packet;
 840         struct alps_fields *f = &priv->f;
 841         int offset;
 842
 843         /*
 844          * v4 has a 6-byte encoding for bitmap data, but this data is
 845          * broken up between 3 normal packets. Use priv->multi_packet to
 846          * track our position in the bitmap packet.
 847          */
 848         if (packet[6] & 0x40) {
 849                 /* sync, reset position */
 850                 priv->multi_packet = 0;
 851         }
 852
 853         if (WARN_ON_ONCE(priv->multi_packet > 2))
 854                 return;
 855
 856         offset = 2 * priv->multi_packet;
 857         priv->multi_data[offset] = packet[6];
 858         priv->multi_data[offset + 1] = packet[7];
 859
 860         if (++priv->multi_packet > 2) {
 861                 priv->multi_packet = 0;
 862
 863                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
 864                            ((priv->multi_data[3] & 0x60) << 3) |
 865                            ((priv->multi_data[0] & 0x3f) << 2) |
 866                            ((priv->multi_data[1] & 0x60) >> 5);
 867                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
 868                            ((priv->multi_data[3] & 0x1f) << 5) |
 869                             (priv->multi_data[1] & 0x1f);
 870
 871                 f->fingers = alps_process_bitmap(priv, f);
 872         }
 873
 874         f->left = !!(packet[4] & 0x01);
 875         f->right = !!(packet[4] & 0x02);
 876
 877         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 878                   ((packet[0] & 0x30) >> 4);
 879         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 880         f->pressure = packet[5] & 0x7f;
 881
 882         alps_report_semi_mt_data(psmouse, f->fingers);
 883 }
 884
 885 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
 886 {
 887         switch (psmouse->pktcnt) {
 888         case 3:
 889                 return (psmouse->packet[2] & 0x40) == 0x40;
 890         case 4:
 891                 return (psmouse->packet[3] & 0x48) == 0x48;
 892         case 6:
 893                 return (psmouse->packet[5] & 0x40) == 0x00;
 894         }
 895         return true;
 896 }
 897
 898 static unsigned char alps_get_packet_id_v7(char *byte)
 899 {
 900         unsigned char packet_id;
 901
 902         if (byte[4] & 0x40)
 903                 packet_id = V7_PACKET_ID_TWO;
 904         else if (byte[4] & 0x01)
 905                 packet_id = V7_PACKET_ID_MULTI;
 906         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
 907                 packet_id = V7_PACKET_ID_NEW;
 908         else if (byte[1] == 0x00 && byte[4] == 0x00)
 909                 packet_id = V7_PACKET_ID_IDLE;
 910         else
 911                 packet_id = V7_PACKET_ID_UNKNOWN;
 912
 913         return packet_id;
 914 }
 915
 916 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
 917                                           unsigned char *pkt,
 918                                           unsigned char pkt_id)
 919 {
 920         mt[0].x = ((pkt[2] & 0x80) << 4);
 921         mt[0].x |= ((pkt[2] & 0x3F) << 5);
 922         mt[0].x |= ((pkt[3] & 0x30) >> 1);
 923         mt[0].x |= (pkt[3] & 0x07);
 924         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
 925
 926         mt[1].x = ((pkt[3] & 0x80) << 4);
 927         mt[1].x |= ((pkt[4] & 0x80) << 3);
 928         mt[1].x |= ((pkt[4] & 0x3F) << 4);
 929         mt[1].y = ((pkt[5] & 0x80) << 3);
 930         mt[1].y |= ((pkt[5] & 0x3F) << 4);
 931
 932         switch (pkt_id) {
 933         case V7_PACKET_ID_TWO:
 934                 mt[1].x &= ~0x000F;
 935                 mt[1].y |= 0x000F;
 936                 break;
 937
 938         case V7_PACKET_ID_MULTI:
 939                 mt[1].x &= ~0x003F;
 940                 mt[1].y &= ~0x0020;
 941                 mt[1].y |= ((pkt[4] & 0x02) << 4);
 942                 mt[1].y |= 0x001F;
 943                 break;
 944
 945         case V7_PACKET_ID_NEW:
 946                 mt[1].x &= ~0x003F;
 947                 mt[1].x |= (pkt[0] & 0x20);
 948                 mt[1].y |= 0x000F;
 949                 break;
 950         }
 951
 952         mt[0].y = 0x7FF - mt[0].y;
 953         mt[1].y = 0x7FF - mt[1].y;
 954 }
 955
 956 static int alps_get_mt_count(struct input_mt_pos *mt)
 957 {
 958         int i, fingers = 0;
 959
 960         for (i = 0; i < MAX_TOUCHES; i++) {
 961                 if (mt[i].x != 0 || mt[i].y != 0)
 962                         fingers++;
 963         }
 964
 965         return fingers;
 966 }
 967
 968 static int alps_decode_packet_v7(struct alps_fields *f,
 969                                   unsigned char *p,
 970                                   struct psmouse *psmouse)
 971 {
 972         struct alps_data *priv = psmouse->private;
 973         unsigned char pkt_id;
 974
 975         pkt_id = alps_get_packet_id_v7(p);
 976         if (pkt_id == V7_PACKET_ID_IDLE)
 977                 return 0;
 978         if (pkt_id == V7_PACKET_ID_UNKNOWN)
 979                 return -1;
 980         /*
 981          * NEW packets are send to indicate a discontinuity in the finger
 982          * coordinate reporting. Specifically a finger may have moved from
 983          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
 984          * us.
 985          *
 986          * NEW packets have 3 problems:
 987          * 1) They do not contain middle / right button info (on non clickpads)
 988          *    this can be worked around by preserving the old button state
 989          * 2) They do not contain an accurate fingercount, and they are
 990          *    typically send when the number of fingers changes. We cannot use
 991          *    the old finger count as that may mismatch with the amount of
 992          *    touch coordinates we've available in the NEW packet
 993          * 3) Their x data for the second touch is inaccurate leading to
 994          *    a possible jump of the x coordinate by 16 units when the first
 995          *    non NEW packet comes in
 996          * Since problems 2 & 3 cannot be worked around, just ignore them.
 997          */
 998         if (pkt_id == V7_PACKET_ID_NEW)
 999                 return 1;
1000
1001         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1002
1003         if (pkt_id == V7_PACKET_ID_TWO)
1004                 f->fingers = alps_get_mt_count(f->mt);
1005         else /* pkt_id == V7_PACKET_ID_MULTI */
1006                 f->fingers = 3 + (p[5] & 0x03);
1007
1008         f->left = (p[0] & 0x80) >> 7;
1009         if (priv->flags & ALPS_BUTTONPAD) {
1010                 if (p[0] & 0x20)
1011                         f->fingers++;
1012                 if (p[0] & 0x10)
1013                         f->fingers++;
1014         } else {
1015                 f->right = (p[0] & 0x20) >> 5;
1016                 f->middle = (p[0] & 0x10) >> 4;
1017         }
1018
1019         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1020         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1021                 f->mt[0].x = f->mt[1].x;
1022                 f->mt[0].y = f->mt[1].y;
1023                 f->mt[1].x = 0;
1024                 f->mt[1].y = 0;
1025         }
1026
1027         return 0;
1028 }
1029
1030 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1031 {
1032         struct alps_data *priv = psmouse->private;
1033         unsigned char *packet = psmouse->packet;
1034         struct input_dev *dev2 = priv->dev2;
1035         int x, y, z, left, right, middle;
1036
1037         /* It should be a DualPoint when received trackstick packet */
1038         if (!(priv->flags & ALPS_DUALPOINT)) {
1039                 psmouse_warn(psmouse,
1040                              "Rejected trackstick packet from non DualPoint device");
1041                 return;
1042         }
1043
1044         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1045         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1046             ((packet[3] & 0x20) << 1);
1047         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1048
1049         left = (packet[1] & 0x01);
1050         right = (packet[1] & 0x02) >> 1;
1051         middle = (packet[1] & 0x04) >> 2;
1052
1053         /* Divide 2 since trackpoint's speed is too fast */
1054         input_report_rel(dev2, REL_X, (char)x / 2);
1055         input_report_rel(dev2, REL_Y, -((char)y / 2));
1056
1057         input_report_key(dev2, BTN_LEFT, left);
1058         input_report_key(dev2, BTN_RIGHT, right);
1059         input_report_key(dev2, BTN_MIDDLE, middle);
1060
1061         input_sync(dev2);
1062 }
1063
1064 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1065 {
1066         struct alps_data *priv = psmouse->private;
1067         struct input_dev *dev = psmouse->dev;
1068         struct alps_fields *f = &priv->f;
1069
1070         memset(f, 0, sizeof(*f));
1071
1072         if (priv->decode_fields(f, psmouse->packet, psmouse))
1073                 return;
1074
1075         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1076
1077         input_mt_report_finger_count(dev, f->fingers);
1078
1079         input_report_key(dev, BTN_LEFT, f->left);
1080         input_report_key(dev, BTN_RIGHT, f->right);
1081         input_report_key(dev, BTN_MIDDLE, f->middle);
1082
1083         input_sync(dev);
1084 }
1085
1086 static void alps_process_packet_v7(struct psmouse *psmouse)
1087 {
1088         unsigned char *packet = psmouse->packet;
1089
1090         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1091                 alps_process_trackstick_packet_v7(psmouse);
1092         else
1093                 alps_process_touchpad_packet_v7(psmouse);
1094 }
1095
1096 static DEFINE_MUTEX(alps_mutex);
1097
1098 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1099 {
1100         struct alps_data *priv =
1101                 container_of(work, struct alps_data, dev3_register_work.work);
1102         struct psmouse *psmouse = priv->psmouse;
1103         struct input_dev *dev3;
1104         int error = 0;
1105
1106         mutex_lock(&alps_mutex);
1107
1108         if (priv->dev3)
1109                 goto out;
1110
1111         dev3 = input_allocate_device();
1112         if (!dev3) {
1113                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1114                 error = -ENOMEM;
1115                 goto out;
1116         }
1117
1118         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1119                  psmouse->ps2dev.serio->phys,
1120                  (priv->dev2 ? "input2" : "input1"));
1121         dev3->phys = priv->phys3;
1122
1123         /*
1124          * format of input device name is: "protocol vendor name"
1125          * see function psmouse_switch_protocol() in psmouse-base.c
1126          */
1127         dev3->name = "PS/2 ALPS Mouse";
1128
1129         dev3->id.bustype = BUS_I8042;
1130         dev3->id.vendor  = 0x0002;
1131         dev3->id.product = PSMOUSE_PS2;
1132         dev3->id.version = 0x0000;
1133         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1134
1135         input_set_capability(dev3, EV_REL, REL_X);
1136         input_set_capability(dev3, EV_REL, REL_Y);
1137         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1138         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1139         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1140
1141         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1142
1143         error = input_register_device(dev3);
1144         if (error) {
1145                 psmouse_err(psmouse,
1146                             "failed to register secondary device: %d\n",
1147                             error);
1148                 input_free_device(dev3);
1149                 goto out;
1150         }
1151
1152         priv->dev3 = dev3;
1153
1154 out:
1155         /*
1156          * Save the error code so that we can detect that we
1157          * already tried to create the device.
1158          */
1159         if (error)
1160                 priv->dev3 = ERR_PTR(error);
1161
1162         mutex_unlock(&alps_mutex);
1163 }
1164
1165 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1166                                         unsigned char packet[],
1167                                         bool report_buttons)
1168 {
1169         struct alps_data *priv = psmouse->private;
1170         struct input_dev *dev, *dev2 = NULL;
1171
1172         /* Figure out which device to use to report the bare packet */
1173         if (priv->proto_version == ALPS_PROTO_V2 &&
1174             (priv->flags & ALPS_DUALPOINT)) {
1175                 /* On V2 devices the DualPoint Stick reports bare packets */
1176                 dev = priv->dev2;
1177                 dev2 = psmouse->dev;
1178         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1179                 /* Register dev3 mouse if we received PS/2 packet first time */
1180                 if (!IS_ERR(priv->dev3))
1181                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1182                                            0);
1183                 return;
1184         } else {
1185                 dev = priv->dev3;
1186         }
1187
1188         if (report_buttons)
1189                 alps_report_buttons(dev, dev2,
1190                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1191
1192         input_report_rel(dev, REL_X,
1193                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1194         input_report_rel(dev, REL_Y,
1195                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1196
1197         input_sync(dev);
1198 }
1199
1200 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1201 {
1202         struct alps_data *priv = psmouse->private;
1203
1204         if (psmouse->pktcnt < 6)
1205                 return PSMOUSE_GOOD_DATA;
1206
1207         if (psmouse->pktcnt == 6) {
1208                 /*
1209                  * Start a timer to flush the packet if it ends up last
1210                  * 6-byte packet in the stream. Timer needs to fire
1211                  * psmouse core times out itself. 20 ms should be enough
1212                  * to decide if we are getting more data or not.
1213                  */
1214                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1215                 return PSMOUSE_GOOD_DATA;
1216         }
1217
1218         del_timer(&priv->timer);
1219
1220         if (psmouse->packet[6] & 0x80) {
1221
1222                 /*
1223                  * Highest bit is set - that means we either had
1224                  * complete ALPS packet and this is start of the
1225                  * next packet or we got garbage.
1226                  */
1227
1228                 if (((psmouse->packet[3] |
1229                       psmouse->packet[4] |
1230                       psmouse->packet[5]) & 0x80) ||
1231                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1232                         psmouse_dbg(psmouse,
1233                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1234                                     psmouse->packet + 3);
1235                         return PSMOUSE_BAD_DATA;
1236                 }
1237
1238                 priv->process_packet(psmouse);
1239
1240                 /* Continue with the next packet */
1241                 psmouse->packet[0] = psmouse->packet[6];
1242                 psmouse->pktcnt = 1;
1243
1244         } else {
1245
1246                 /*
1247                  * High bit is 0 - that means that we indeed got a PS/2
1248                  * packet in the middle of ALPS packet.
1249                  *
1250                  * There is also possibility that we got 6-byte ALPS
1251                  * packet followed  by 3-byte packet from trackpoint. We
1252                  * can not distinguish between these 2 scenarios but
1253                  * because the latter is unlikely to happen in course of
1254                  * normal operation (user would need to press all
1255                  * buttons on the pad and start moving trackpoint
1256                  * without touching the pad surface) we assume former.
1257                  * Even if we are wrong the wost thing that would happen
1258                  * the cursor would jump but we should not get protocol
1259                  * de-synchronization.
1260                  */
1261
1262                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1263                                             false);
1264
1265                 /*
1266                  * Continue with the standard ALPS protocol handling,
1267                  * but make sure we won't process it as an interleaved
1268                  * packet again, which may happen if all buttons are
1269                  * pressed. To avoid this let's reset the 4th bit which
1270                  * is normally 1.
1271                  */
1272                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1273                 psmouse->pktcnt = 4;
1274         }
1275
1276         return PSMOUSE_GOOD_DATA;
1277 }
1278
1279 static void alps_flush_packet(unsigned long data)
1280 {
1281         struct psmouse *psmouse = (struct psmouse *)data;
1282         struct alps_data *priv = psmouse->private;
1283
1284         serio_pause_rx(psmouse->ps2dev.serio);
1285
1286         if (psmouse->pktcnt == psmouse->pktsize) {
1287
1288                 /*
1289                  * We did not any more data in reasonable amount of time.
1290                  * Validate the last 3 bytes and process as a standard
1291                  * ALPS packet.
1292                  */
1293                 if ((psmouse->packet[3] |
1294                      psmouse->packet[4] |
1295                      psmouse->packet[5]) & 0x80) {
1296                         psmouse_dbg(psmouse,
1297                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1298                                     psmouse->packet + 3);
1299                 } else {
1300                         priv->process_packet(psmouse);
1301                 }
1302                 psmouse->pktcnt = 0;
1303         }
1304
1305         serio_continue_rx(psmouse->ps2dev.serio);
1306 }
1307
1308 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1309 {
1310         struct alps_data *priv = psmouse->private;
1311
1312         /*
1313          * Check if we are dealing with a bare PS/2 packet, presumably from
1314          * a device connected to the external PS/2 port. Because bare PS/2
1315          * protocol does not have enough constant bits to self-synchronize
1316          * properly we only do this if the device is fully synchronized.
1317          */
1318         if (!psmouse->out_of_sync_cnt && (psmouse->packet[0] & 0xc8) == 0x08) {
1319                 if (psmouse->pktcnt == 3) {
1320                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1321                                                     true);
1322                         return PSMOUSE_FULL_PACKET;
1323                 }
1324                 return PSMOUSE_GOOD_DATA;
1325         }
1326
1327         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1328
1329         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1330             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1331                 return alps_handle_interleaved_ps2(psmouse);
1332         }
1333
1334         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1335                 psmouse_dbg(psmouse,
1336                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1337                             psmouse->packet[0], priv->mask0, priv->byte0);
1338                 return PSMOUSE_BAD_DATA;
1339         }
1340
1341         /* Bytes 2 - pktsize should have 0 in the highest bit */
1342         if (priv->proto_version < ALPS_PROTO_V5 &&
1343             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1344             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1345                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1346                             psmouse->pktcnt - 1,
1347                             psmouse->packet[psmouse->pktcnt - 1]);
1348
1349                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1350                     psmouse->pktcnt == psmouse->pktsize) {
1351                         /*
1352                          * Some Dell boxes, such as Latitude E6440 or E7440
1353                          * with closed lid, quite often smash last byte of
1354                          * otherwise valid packet with 0xff. Given that the
1355                          * next packet is very likely to be valid let's
1356                          * report PSMOUSE_FULL_PACKET but not process data,
1357                          * rather than reporting PSMOUSE_BAD_DATA and
1358                          * filling the logs.
1359                          */
1360                         return PSMOUSE_FULL_PACKET;
1361                 }
1362
1363                 return PSMOUSE_BAD_DATA;
1364         }
1365
1366         if (priv->proto_version == ALPS_PROTO_V7 &&
1367             !alps_is_valid_package_v7(psmouse)) {
1368                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1369                             psmouse->pktcnt - 1,
1370                             psmouse->packet[psmouse->pktcnt - 1]);
1371                 return PSMOUSE_BAD_DATA;
1372         }
1373
1374         if (psmouse->pktcnt == psmouse->pktsize) {
1375                 priv->process_packet(psmouse);
1376                 return PSMOUSE_FULL_PACKET;
1377         }
1378
1379         return PSMOUSE_GOOD_DATA;
1380 }
1381
1382 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1383 {
1384         struct ps2dev *ps2dev = &psmouse->ps2dev;
1385         struct alps_data *priv = psmouse->private;
1386         int command;
1387         unsigned char *param;
1388         unsigned char dummy[4];
1389
1390         BUG_ON(nibble > 0xf);
1391
1392         command = priv->nibble_commands[nibble].command;
1393         param = (command & 0x0f00) ?
1394                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1395
1396         if (ps2_command(ps2dev, param, command))
1397                 return -1;
1398
1399         return 0;
1400 }
1401
1402 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1403 {
1404         struct ps2dev *ps2dev = &psmouse->ps2dev;
1405         struct alps_data *priv = psmouse->private;
1406         int i, nibble;
1407
1408         if (ps2_command(ps2dev, NULL, priv->addr_command))
1409                 return -1;
1410
1411         for (i = 12; i >= 0; i -= 4) {
1412                 nibble = (addr >> i) & 0xf;
1413                 if (alps_command_mode_send_nibble(psmouse, nibble))
1414                         return -1;
1415         }
1416
1417         return 0;
1418 }
1419
1420 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1421 {
1422         struct ps2dev *ps2dev = &psmouse->ps2dev;
1423         unsigned char param[4];
1424
1425         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1426                 return -1;
1427
1428         /*
1429          * The address being read is returned in the first two bytes
1430          * of the result. Check that this address matches the expected
1431          * address.
1432          */
1433         if (addr != ((param[0] << 8) | param[1]))
1434                 return -1;
1435
1436         return param[2];
1437 }
1438
1439 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1440 {
1441         if (alps_command_mode_set_addr(psmouse, addr))
1442                 return -1;
1443         return __alps_command_mode_read_reg(psmouse, addr);
1444 }
1445
1446 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1447 {
1448         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1449                 return -1;
1450         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1451                 return -1;
1452         return 0;
1453 }
1454
1455 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1456                                        u8 value)
1457 {
1458         if (alps_command_mode_set_addr(psmouse, addr))
1459                 return -1;
1460         return __alps_command_mode_write_reg(psmouse, value);
1461 }
1462
1463 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1464                         int repeated_command, unsigned char *param)
1465 {
1466         struct ps2dev *ps2dev = &psmouse->ps2dev;
1467
1468         param[0] = 0;
1469         if (init_command && ps2_command(ps2dev, param, init_command))
1470                 return -EIO;
1471
1472         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1473             ps2_command(ps2dev,  NULL, repeated_command) ||
1474             ps2_command(ps2dev,  NULL, repeated_command))
1475                 return -EIO;
1476
1477         param[0] = param[1] = param[2] = 0xff;
1478         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1479                 return -EIO;
1480
1481         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1482                     repeated_command, param);
1483         return 0;
1484 }
1485
1486 static bool alps_check_valid_firmware_id(unsigned char id[])
1487 {
1488         if (id[0] == 0x73)
1489                 return true;
1490
1491         if (id[0] == 0x88 &&
1492             (id[1] == 0x07 ||
1493              id[1] == 0x08 ||
1494              (id[1] & 0xf0) == 0xb0 ||
1495              (id[1] & 0xf0) == 0xc0)) {
1496                 return true;
1497         }
1498
1499         return false;
1500 }
1501
1502 static int alps_enter_command_mode(struct psmouse *psmouse)
1503 {
1504         unsigned char param[4];
1505
1506         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1507                 psmouse_err(psmouse, "failed to enter command mode\n");
1508                 return -1;
1509         }
1510
1511         if (!alps_check_valid_firmware_id(param)) {
1512                 psmouse_dbg(psmouse,
1513                             "unknown response while entering command mode\n");
1514                 return -1;
1515         }
1516         return 0;
1517 }
1518
1519 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1520 {
1521         struct ps2dev *ps2dev = &psmouse->ps2dev;
1522         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1523                 return -1;
1524         return 0;
1525 }
1526
1527 /*
1528  * For DualPoint devices select the device that should respond to
1529  * subsequent commands. It looks like glidepad is behind stickpointer,
1530  * I'd thought it would be other way around...
1531  */
1532 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1533 {
1534         struct ps2dev *ps2dev = &psmouse->ps2dev;
1535         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1536
1537         if (ps2_command(ps2dev, NULL, cmd) ||
1538             ps2_command(ps2dev, NULL, cmd) ||
1539             ps2_command(ps2dev, NULL, cmd) ||
1540             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1541                 return -1;
1542
1543         /* we may get 3 more bytes, just ignore them */
1544         ps2_drain(ps2dev, 3, 100);
1545
1546         return 0;
1547 }
1548
1549 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1550 {
1551         struct ps2dev *ps2dev = &psmouse->ps2dev;
1552
1553         /* Try ALPS magic knock - 4 disable before enable */
1554         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1555             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1556             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1557             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1558             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1559                 return -1;
1560
1561         /*
1562          * Switch mouse to poll (remote) mode so motion data will not
1563          * get in our way
1564          */
1565         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1566 }
1567
1568 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1569 {
1570         int i, nibble;
1571
1572         /*
1573          * b0-b11 are valid bits, send sequence is inverse.
1574          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1575          */
1576         for (i = 0; i <= 8; i += 4) {
1577                 nibble = (word >> i) & 0xf;
1578                 if (alps_command_mode_send_nibble(psmouse, nibble))
1579                         return -1;
1580         }
1581
1582         return 0;
1583 }
1584
1585 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1586                                        u16 addr, u16 value)
1587 {
1588         struct ps2dev *ps2dev = &psmouse->ps2dev;
1589
1590         /* 0x0A0 is the command to write the word */
1591         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1592             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1593             alps_monitor_mode_send_word(psmouse, addr) ||
1594             alps_monitor_mode_send_word(psmouse, value) ||
1595             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1596                 return -1;
1597
1598         return 0;
1599 }
1600
1601 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1602 {
1603         struct ps2dev *ps2dev = &psmouse->ps2dev;
1604
1605         if (enable) {
1606                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1607                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1608                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1609                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1610                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1611                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1612                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1613                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1614                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1615                         return -1;
1616         } else {
1617                 /* EC to exit monitor mode */
1618                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1619                         return -1;
1620         }
1621
1622         return 0;
1623 }
1624
1625 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1626 {
1627         u16 reg_val = 0x181;
1628         int ret = -1;
1629
1630         /* enter monitor mode, to write the register */
1631         if (alps_monitor_mode(psmouse, true))
1632                 return -1;
1633
1634         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1635
1636         if (alps_monitor_mode(psmouse, false))
1637                 ret = -1;
1638
1639         return ret;
1640 }
1641
1642 static int alps_get_status(struct psmouse *psmouse, char *param)
1643 {
1644         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1645         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1646                 return -1;
1647
1648         return 0;
1649 }
1650
1651 /*
1652  * Turn touchpad tapping on or off. The sequences are:
1653  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1654  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1655  * My guess that 0xE9 (GetInfo) is here as a sync point.
1656  * For models that also have stickpointer (DualPoints) its tapping
1657  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1658  * we don't fiddle with it.
1659  */
1660 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1661 {
1662         struct ps2dev *ps2dev = &psmouse->ps2dev;
1663         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1664         unsigned char tap_arg = enable ? 0x0A : 0x00;
1665         unsigned char param[4];
1666
1667         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1668             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1669             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1670             ps2_command(ps2dev, &tap_arg, cmd))
1671                 return -1;
1672
1673         if (alps_get_status(psmouse, param))
1674                 return -1;
1675
1676         return 0;
1677 }
1678
1679 /*
1680  * alps_poll() - poll the touchpad for current motion packet.
1681  * Used in resync.
1682  */
1683 static int alps_poll(struct psmouse *psmouse)
1684 {
1685         struct alps_data *priv = psmouse->private;
1686         unsigned char buf[sizeof(psmouse->packet)];
1687         bool poll_failed;
1688
1689         if (priv->flags & ALPS_PASS)
1690                 alps_passthrough_mode_v2(psmouse, true);
1691
1692         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1693                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1694
1695         if (priv->flags & ALPS_PASS)
1696                 alps_passthrough_mode_v2(psmouse, false);
1697
1698         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1699                 return -1;
1700
1701         if ((psmouse->badbyte & 0xc8) == 0x08) {
1702 /*
1703  * Poll the track stick ...
1704  */
1705                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1706                         return -1;
1707         }
1708
1709         memcpy(psmouse->packet, buf, sizeof(buf));
1710         return 0;
1711 }
1712
1713 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1714 {
1715         struct alps_data *priv = psmouse->private;
1716
1717         if ((priv->flags & ALPS_PASS) &&
1718             alps_passthrough_mode_v2(psmouse, true)) {
1719                 return -1;
1720         }
1721
1722         if (alps_tap_mode(psmouse, true)) {
1723                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1724                 return -1;
1725         }
1726
1727         if (alps_absolute_mode_v1_v2(psmouse)) {
1728                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1729                 return -1;
1730         }
1731
1732         if ((priv->flags & ALPS_PASS) &&
1733             alps_passthrough_mode_v2(psmouse, false)) {
1734                 return -1;
1735         }
1736
1737         /* ALPS needs stream mode, otherwise it won't report any data */
1738         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1739                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1740                 return -1;
1741         }
1742
1743         return 0;
1744 }
1745
1746 static int alps_hw_init_v6(struct psmouse *psmouse)
1747 {
1748         unsigned char param[2] = {0xC8, 0x14};
1749
1750         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1751         if (alps_passthrough_mode_v2(psmouse, true))
1752                 return -1;
1753
1754         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1755             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1756             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1757             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1758             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1759                 return -1;
1760
1761         if (alps_passthrough_mode_v2(psmouse, false))
1762                 return -1;
1763
1764         if (alps_absolute_mode_v6(psmouse)) {
1765                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1766                 return -1;
1767         }
1768
1769         return 0;
1770 }
1771
1772 /*
1773  * Enable or disable passthrough mode to the trackstick.
1774  */
1775 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1776                                     int reg_base, bool enable)
1777 {
1778         int reg_val, ret = -1;
1779
1780         if (alps_enter_command_mode(psmouse))
1781                 return -1;
1782
1783         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1784         if (reg_val == -1)
1785                 goto error;
1786
1787         if (enable)
1788                 reg_val |= 0x01;
1789         else
1790                 reg_val &= ~0x01;
1791
1792         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1793
1794 error:
1795         if (alps_exit_command_mode(psmouse))
1796                 ret = -1;
1797         return ret;
1798 }
1799
1800 /* Must be in command mode when calling this function */
1801 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1802 {
1803         int reg_val;
1804
1805         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1806         if (reg_val == -1)
1807                 return -1;
1808
1809         reg_val |= 0x06;
1810         if (__alps_command_mode_write_reg(psmouse, reg_val))
1811                 return -1;
1812
1813         return 0;
1814 }
1815
1816 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
1817 {
1818         int ret = -EIO, reg_val;
1819
1820         if (alps_enter_command_mode(psmouse))
1821                 goto error;
1822
1823         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
1824         if (reg_val == -1)
1825                 goto error;
1826
1827         /* bit 7: trackstick is present */
1828         ret = reg_val & 0x80 ? 0 : -ENODEV;
1829
1830 error:
1831         alps_exit_command_mode(psmouse);
1832         return ret;
1833 }
1834
1835 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
1836 {
1837         struct ps2dev *ps2dev = &psmouse->ps2dev;
1838         int ret = 0;
1839         unsigned char param[4];
1840
1841         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
1842                 return -EIO;
1843
1844         /*
1845          * E7 report for the trackstick
1846          *
1847          * There have been reports of failures to seem to trace back
1848          * to the above trackstick check failing. When these occur
1849          * this E7 report fails, so when that happens we continue
1850          * with the assumption that there isn't a trackstick after
1851          * all.
1852          */
1853         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
1854                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
1855                 ret = -ENODEV;
1856         } else {
1857                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
1858
1859                 /*
1860                  * Not sure what this does, but it is absolutely
1861                  * essential. Without it, the touchpad does not
1862                  * work at all and the trackstick just emits normal
1863                  * PS/2 packets.
1864                  */
1865                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1866                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1867                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1868                     alps_command_mode_send_nibble(psmouse, 0x9) ||
1869                     alps_command_mode_send_nibble(psmouse, 0x4)) {
1870                         psmouse_err(psmouse,
1871                                     "Error sending magic E6 sequence\n");
1872                         ret = -EIO;
1873                         goto error;
1874                 }
1875
1876                 /*
1877                  * This ensures the trackstick packets are in the format
1878                  * supported by this driver. If bit 1 isn't set the packet
1879                  * format is different.
1880                  */
1881                 if (alps_enter_command_mode(psmouse) ||
1882                     alps_command_mode_write_reg(psmouse,
1883                                                 reg_base + 0x08, 0x82) ||
1884                     alps_exit_command_mode(psmouse))
1885                         ret = -EIO;
1886         }
1887
1888 error:
1889         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
1890                 ret = -EIO;
1891
1892         return ret;
1893 }
1894
1895 static int alps_hw_init_v3(struct psmouse *psmouse)
1896 {
1897         struct ps2dev *ps2dev = &psmouse->ps2dev;
1898         int reg_val;
1899         unsigned char param[4];
1900
1901         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
1902         if (reg_val == -EIO)
1903                 goto error;
1904
1905         if (reg_val == 0 &&
1906             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
1907                 goto error;
1908
1909         if (alps_enter_command_mode(psmouse) ||
1910             alps_absolute_mode_v3(psmouse)) {
1911                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1912                 goto error;
1913         }
1914
1915         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1916         if (reg_val == -1)
1917                 goto error;
1918         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1919                 goto error;
1920
1921         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1922         if (reg_val == -1)
1923                 goto error;
1924         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1925                 goto error;
1926
1927         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1928                 goto error;
1929         if (__alps_command_mode_write_reg(psmouse, 0x04))
1930                 goto error;
1931
1932         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1933                 goto error;
1934         if (__alps_command_mode_write_reg(psmouse, 0x03))
1935                 goto error;
1936
1937         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1938                 goto error;
1939         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1940                 goto error;
1941
1942         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1943                 goto error;
1944         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1945                 goto error;
1946
1947         alps_exit_command_mode(psmouse);
1948
1949         /* Set rate and enable data reporting */
1950         param[0] = 0x64;
1951         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1952             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1953                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1954                 return -1;
1955         }
1956
1957         return 0;
1958
1959 error:
1960         /*
1961          * Leaving the touchpad in command mode will essentially render
1962          * it unusable until the machine reboots, so exit it here just
1963          * to be safe
1964          */
1965         alps_exit_command_mode(psmouse);
1966         return -1;
1967 }
1968
1969 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
1970 {
1971         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
1972         struct alps_data *priv = psmouse->private;
1973
1974         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
1975         if (reg < 0)
1976                 return reg;
1977
1978         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1979         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
1980
1981         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
1982         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
1983
1984         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
1985         if (reg < 0)
1986                 return reg;
1987
1988         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1989         x_electrode = 17 + x_electrode;
1990
1991         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
1992         y_electrode = 13 + y_electrode;
1993
1994         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
1995         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
1996
1997         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
1998         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
1999
2000         psmouse_dbg(psmouse,
2001                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2002                     x_pitch, y_pitch, x_electrode, y_electrode,
2003                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2004
2005         return 0;
2006 }
2007
2008 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2009 {
2010         struct alps_data *priv = psmouse->private;
2011         struct ps2dev *ps2dev = &psmouse->ps2dev;
2012         int reg_val, ret = -1;
2013
2014         if (priv->flags & ALPS_DUALPOINT) {
2015                 reg_val = alps_setup_trackstick_v3(psmouse,
2016                                                    ALPS_REG_BASE_RUSHMORE);
2017                 if (reg_val == -EIO)
2018                         goto error;
2019         }
2020
2021         if (alps_enter_command_mode(psmouse) ||
2022             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2023             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2024                 goto error;
2025
2026         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2027                 goto error;
2028
2029         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2030         if (reg_val == -1)
2031                 goto error;
2032         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2033                 goto error;
2034
2035         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2036                 goto error;
2037
2038         /* enter absolute mode */
2039         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2040         if (reg_val == -1)
2041                 goto error;
2042         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2043                 goto error;
2044
2045         alps_exit_command_mode(psmouse);
2046         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2047
2048 error:
2049         alps_exit_command_mode(psmouse);
2050         return ret;
2051 }
2052
2053 /* Must be in command mode when calling this function */
2054 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2055 {
2056         int reg_val;
2057
2058         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2059         if (reg_val == -1)
2060                 return -1;
2061
2062         reg_val |= 0x02;
2063         if (__alps_command_mode_write_reg(psmouse, reg_val))
2064                 return -1;
2065
2066         return 0;
2067 }
2068
2069 static int alps_hw_init_v4(struct psmouse *psmouse)
2070 {
2071         struct ps2dev *ps2dev = &psmouse->ps2dev;
2072         unsigned char param[4];
2073
2074         if (alps_enter_command_mode(psmouse))
2075                 goto error;
2076
2077         if (alps_absolute_mode_v4(psmouse)) {
2078                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2079                 goto error;
2080         }
2081
2082         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2083                 goto error;
2084
2085         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2086                 goto error;
2087
2088         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2089                 goto error;
2090
2091         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2092                 goto error;
2093
2094         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2095                 goto error;
2096
2097         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2098                 goto error;
2099
2100         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2101                 goto error;
2102
2103         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2104                 goto error;
2105
2106         alps_exit_command_mode(psmouse);
2107
2108         /*
2109          * This sequence changes the output from a 9-byte to an
2110          * 8-byte format. All the same data seems to be present,
2111          * just in a more compact format.
2112          */
2113         param[0] = 0xc8;
2114         param[1] = 0x64;
2115         param[2] = 0x50;
2116         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2117             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2118             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2119             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2120                 return -1;
2121
2122         /* Set rate and enable data reporting */
2123         param[0] = 0x64;
2124         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2125             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2126                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2127                 return -1;
2128         }
2129
2130         return 0;
2131
2132 error:
2133         /*
2134          * Leaving the touchpad in command mode will essentially render
2135          * it unusable until the machine reboots, so exit it here just
2136          * to be safe
2137          */
2138         alps_exit_command_mode(psmouse);
2139         return -1;
2140 }
2141
2142 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2143                                         struct alps_data *priv)
2144 {
2145         struct ps2dev *ps2dev = &psmouse->ps2dev;
2146         unsigned char param[4] = {0};
2147         int num_x_electrode, num_y_electrode;
2148
2149         if (alps_enter_command_mode(psmouse))
2150                 return -1;
2151
2152         param[0] = 0x0a;
2153         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2154             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2155             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2156             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2157             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2158                 return -1;
2159
2160         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2161                 return -1;
2162
2163         /*
2164          * Dolphin's sensor line number is not fixed. It can be calculated
2165          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2166          * Further more, we can get device's x_max and y_max by multiplying
2167          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2168          *
2169          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2170          *      real sensor line number X = 11 + 8 = 19, and
2171          *      real sensor line number Y = 8 + 1 = 9.
2172          *      So, x_max = (19 - 1) * 64 = 1152, and
2173          *          y_max = (9 - 1) * 64 = 512.
2174          */
2175         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2176         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2177         priv->x_bits = num_x_electrode;
2178         priv->y_bits = num_y_electrode;
2179         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2180         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2181
2182         if (alps_exit_command_mode(psmouse))
2183                 return -1;
2184
2185         return 0;
2186 }
2187
2188 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2189 {
2190         struct ps2dev *ps2dev = &psmouse->ps2dev;
2191         unsigned char param[2];
2192
2193         /* This is dolphin "v1" as empirically defined by florin9doi */
2194         param[0] = 0x64;
2195         param[1] = 0x28;
2196
2197         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2198             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2199             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2200                 return -1;
2201
2202         return 0;
2203 }
2204
2205 static int alps_hw_init_v7(struct psmouse *psmouse)
2206 {
2207         struct ps2dev *ps2dev = &psmouse->ps2dev;
2208         int reg_val, ret = -1;
2209
2210         if (alps_enter_command_mode(psmouse) ||
2211             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2212                 goto error;
2213
2214         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2215                 goto error;
2216
2217         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2218                 goto error;
2219
2220         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2221         if (reg_val == -1)
2222                 goto error;
2223         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2224                 goto error;
2225
2226         alps_exit_command_mode(psmouse);
2227         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2228
2229 error:
2230         alps_exit_command_mode(psmouse);
2231         return ret;
2232 }
2233
2234 static int alps_set_protocol(struct psmouse *psmouse,
2235                              struct alps_data *priv,
2236                              const struct alps_protocol_info *protocol)
2237 {
2238         psmouse->private = priv;
2239
2240         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2241
2242         priv->proto_version = protocol->version;
2243         priv->byte0 = protocol->byte0;
2244         priv->mask0 = protocol->mask0;
2245         priv->flags = protocol->flags;
2246
2247         priv->x_max = 2000;
2248         priv->y_max = 1400;
2249         priv->x_bits = 15;
2250         priv->y_bits = 11;
2251
2252         switch (priv->proto_version) {
2253         case ALPS_PROTO_V1:
2254         case ALPS_PROTO_V2:
2255                 priv->hw_init = alps_hw_init_v1_v2;
2256                 priv->process_packet = alps_process_packet_v1_v2;
2257                 priv->set_abs_params = alps_set_abs_params_st;
2258                 priv->x_max = 1023;
2259                 priv->y_max = 767;
2260                 break;
2261
2262         case ALPS_PROTO_V3:
2263                 priv->hw_init = alps_hw_init_v3;
2264                 priv->process_packet = alps_process_packet_v3;
2265                 priv->set_abs_params = alps_set_abs_params_mt;
2266                 priv->decode_fields = alps_decode_pinnacle;
2267                 priv->nibble_commands = alps_v3_nibble_commands;
2268                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2269                 break;
2270
2271         case ALPS_PROTO_V3_RUSHMORE:
2272                 priv->hw_init = alps_hw_init_rushmore_v3;
2273                 priv->process_packet = alps_process_packet_v3;
2274                 priv->set_abs_params = alps_set_abs_params_mt;
2275                 priv->decode_fields = alps_decode_rushmore;
2276                 priv->nibble_commands = alps_v3_nibble_commands;
2277                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2278                 priv->x_bits = 16;
2279                 priv->y_bits = 12;
2280
2281                 if (alps_probe_trackstick_v3(psmouse,
2282                                              ALPS_REG_BASE_RUSHMORE) < 0)
2283                         priv->flags &= ~ALPS_DUALPOINT;
2284
2285                 break;
2286
2287         case ALPS_PROTO_V4:
2288                 priv->hw_init = alps_hw_init_v4;
2289                 priv->process_packet = alps_process_packet_v4;
2290                 priv->set_abs_params = alps_set_abs_params_mt;
2291                 priv->nibble_commands = alps_v4_nibble_commands;
2292                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2293                 break;
2294
2295         case ALPS_PROTO_V5:
2296                 priv->hw_init = alps_hw_init_dolphin_v1;
2297                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2298                 priv->decode_fields = alps_decode_dolphin;
2299                 priv->set_abs_params = alps_set_abs_params_mt;
2300                 priv->nibble_commands = alps_v3_nibble_commands;
2301                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2302                 priv->x_bits = 23;
2303                 priv->y_bits = 12;
2304
2305                 if (alps_dolphin_get_device_area(psmouse, priv))
2306                         return -EIO;
2307
2308                 break;
2309
2310         case ALPS_PROTO_V6:
2311                 priv->hw_init = alps_hw_init_v6;
2312                 priv->process_packet = alps_process_packet_v6;
2313                 priv->set_abs_params = alps_set_abs_params_st;
2314                 priv->nibble_commands = alps_v6_nibble_commands;
2315                 priv->x_max = 2047;
2316                 priv->y_max = 1535;
2317                 break;
2318
2319         case ALPS_PROTO_V7:
2320                 priv->hw_init = alps_hw_init_v7;
2321                 priv->process_packet = alps_process_packet_v7;
2322                 priv->decode_fields = alps_decode_packet_v7;
2323                 priv->set_abs_params = alps_set_abs_params_mt;
2324                 priv->nibble_commands = alps_v3_nibble_commands;
2325                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2326                 priv->x_max = 0xfff;
2327                 priv->y_max = 0x7ff;
2328
2329                 if (priv->fw_ver[1] != 0xba)
2330                         priv->flags |= ALPS_BUTTONPAD;
2331
2332                 break;
2333         }
2334
2335         return 0;
2336 }
2337
2338 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2339                                                          unsigned char *ec)
2340 {
2341         const struct alps_model_info *model;
2342         int i;
2343
2344         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2345                 model = &alps_model_data[i];
2346
2347                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2348                     (!model->command_mode_resp ||
2349                      model->command_mode_resp == ec[2])) {
2350
2351                         return &model->protocol_info;
2352                 }
2353         }
2354
2355         return NULL;
2356 }
2357
2358 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2359 {
2360         const struct alps_protocol_info *protocol;
2361         unsigned char e6[4], e7[4], ec[4];
2362         int error;
2363
2364         /*
2365          * First try "E6 report".
2366          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2367          * The bits 0-2 of the first byte will be 1s if some buttons are
2368          * pressed.
2369          */
2370         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2371                          PSMOUSE_CMD_SETSCALE11, e6))
2372                 return -EIO;
2373
2374         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2375                 return -EINVAL;
2376
2377         /*
2378          * Now get the "E7" and "EC" reports.  These will uniquely identify
2379          * most ALPS touchpads.
2380          */
2381         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2382                          PSMOUSE_CMD_SETSCALE21, e7) ||
2383             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2384                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2385             alps_exit_command_mode(psmouse))
2386                 return -EIO;
2387
2388         protocol = alps_match_table(e7, ec);
2389         if (!protocol) {
2390                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2391                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2392                         protocol = &alps_v5_protocol_data;
2393                 } else if (ec[0] == 0x88 &&
2394                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2395                         protocol = &alps_v7_protocol_data;
2396                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2397                         protocol = &alps_v3_rushmore_data;
2398                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2399                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2400                         protocol = &alps_v3_protocol_data;
2401                 } else {
2402                         psmouse_dbg(psmouse,
2403                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2404                         return -EINVAL;
2405                 }
2406         }
2407
2408         if (priv) {
2409                 /* Save the Firmware version */
2410                 memcpy(priv->fw_ver, ec, 3);
2411                 error = alps_set_protocol(psmouse, priv, protocol);
2412                 if (error)
2413                         return error;
2414         }
2415
2416         return 0;
2417 }
2418
2419 static int alps_reconnect(struct psmouse *psmouse)
2420 {
2421         struct alps_data *priv = psmouse->private;
2422
2423         psmouse_reset(psmouse);
2424
2425         if (alps_identify(psmouse, priv) < 0)
2426                 return -1;
2427
2428         return priv->hw_init(psmouse);
2429 }
2430
2431 static void alps_disconnect(struct psmouse *psmouse)
2432 {
2433         struct alps_data *priv = psmouse->private;
2434
2435         psmouse_reset(psmouse);
2436         del_timer_sync(&priv->timer);
2437         if (priv->dev2)
2438                 input_unregister_device(priv->dev2);
2439         if (!IS_ERR_OR_NULL(priv->dev3))
2440                 input_unregister_device(priv->dev3);
2441         kfree(priv);
2442 }
2443
2444 static void alps_set_abs_params_st(struct alps_data *priv,
2445                                    struct input_dev *dev1)
2446 {
2447         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2448         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2449 }
2450
2451 static void alps_set_abs_params_mt(struct alps_data *priv,
2452                                    struct input_dev *dev1)
2453 {
2454         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2455         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2456
2457         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2458         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2459
2460         input_mt_init_slots(dev1, MAX_TOUCHES, INPUT_MT_POINTER |
2461                 INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2462
2463         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2464         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2465
2466         /* V7 is real multi-touch */
2467         if (priv->proto_version == ALPS_PROTO_V7)
2468                 clear_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
2469 }
2470
2471 int alps_init(struct psmouse *psmouse)
2472 {
2473         struct alps_data *priv = psmouse->private;
2474         struct input_dev *dev1 = psmouse->dev;
2475         int error;
2476
2477         error = priv->hw_init(psmouse);
2478         if (error)
2479                 goto init_fail;
2480
2481         /*
2482          * Undo part of setup done for us by psmouse core since touchpad
2483          * is not a relative device.
2484          */
2485         __clear_bit(EV_REL, dev1->evbit);
2486         __clear_bit(REL_X, dev1->relbit);
2487         __clear_bit(REL_Y, dev1->relbit);
2488
2489         /*
2490          * Now set up our capabilities.
2491          */
2492         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2493         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2494         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2495         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2496                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2497
2498         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2499
2500         priv->set_abs_params(priv, dev1);
2501         /* No pressure on V7 */
2502         if (priv->proto_version != ALPS_PROTO_V7)
2503                 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2504
2505         if (priv->flags & ALPS_WHEEL) {
2506                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2507                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2508         }
2509
2510         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2511                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2512                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2513         }
2514
2515         if (priv->flags & ALPS_FOUR_BUTTONS) {
2516                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2517                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2518                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2519                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2520         } else if (priv->flags & ALPS_BUTTONPAD) {
2521                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2522                 clear_bit(BTN_RIGHT, dev1->keybit);
2523         } else {
2524                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2525         }
2526
2527         if (priv->flags & ALPS_DUALPOINT) {
2528                 struct input_dev *dev2;
2529
2530                 dev2 = input_allocate_device();
2531                 if (!dev2) {
2532                         psmouse_err(psmouse,
2533                                     "failed to allocate trackstick device\n");
2534                         error = -ENOMEM;
2535                         goto init_fail;
2536                 }
2537
2538                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2539                          psmouse->ps2dev.serio->phys);
2540                 dev2->phys = priv->phys2;
2541
2542                 /*
2543                  * format of input device name is: "protocol vendor name"
2544                  * see function psmouse_switch_protocol() in psmouse-base.c
2545                  */
2546                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2547
2548                 dev2->id.bustype = BUS_I8042;
2549                 dev2->id.vendor  = 0x0002;
2550                 dev2->id.product = PSMOUSE_ALPS;
2551                 dev2->id.version = priv->proto_version;
2552                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2553
2554                 input_set_capability(dev2, EV_REL, REL_X);
2555                 input_set_capability(dev2, EV_REL, REL_Y);
2556                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2557                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2558                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2559
2560                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2561                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2562
2563                 error = input_register_device(dev2);
2564                 if (error) {
2565                         psmouse_err(psmouse,
2566                                     "failed to register trackstick device: %d\n",
2567                                     error);
2568                         input_free_device(dev2);
2569                         goto init_fail;
2570                 }
2571
2572                 priv->dev2 = dev2;
2573         }
2574
2575         priv->psmouse = psmouse;
2576
2577         INIT_DELAYED_WORK(&priv->dev3_register_work,
2578                           alps_register_bare_ps2_mouse);
2579
2580         psmouse->protocol_handler = alps_process_byte;
2581         psmouse->poll = alps_poll;
2582         psmouse->disconnect = alps_disconnect;
2583         psmouse->reconnect = alps_reconnect;
2584         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2585
2586         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2587         psmouse->resync_time = 0;
2588
2589         /* Allow 2 invalid packets without resetting device */
2590         psmouse->resetafter = psmouse->pktsize * 2;
2591
2592         return 0;
2593
2594 init_fail:
2595         psmouse_reset(psmouse);
2596         /*
2597          * Even though we did not allocate psmouse->private we do free
2598          * it here.
2599          */
2600         kfree(psmouse->private);
2601         psmouse->private = NULL;
2602         return error;
2603 }
2604
2605 int alps_detect(struct psmouse *psmouse, bool set_properties)
2606 {
2607         struct alps_data *priv;
2608         int error;
2609
2610         error = alps_identify(psmouse, NULL);
2611         if (error)
2612                 return error;
2613
2614         /*
2615          * Reset the device to make sure it is fully operational:
2616          * on some laptops, like certain Dell Latitudes, we may
2617          * fail to properly detect presence of trackstick if device
2618          * has not been reset.
2619          */
2620         psmouse_reset(psmouse);
2621
2622         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2623         if (!priv)
2624                 return -ENOMEM;
2625
2626         error = alps_identify(psmouse, priv);
2627         if (error) {
2628                 kfree(priv);
2629                 return error;
2630         }
2631
2632         if (set_properties) {
2633                 psmouse->vendor = "ALPS";
2634                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
2635                                 "DualPoint TouchPad" : "GlidePoint";
2636                 psmouse->model = priv->proto_version;
2637         } else {
2638                 /*
2639                  * Destroy alps_data structure we allocated earlier since
2640                  * this was just a "trial run". Otherwise we'll keep it
2641                  * to be used by alps_init() which has to be called if
2642                  * we succeed and set_properties is true.
2643                  */
2644                 kfree(priv);
2645                 psmouse->private = NULL;
2646         }
2647
2648         return 0;
2649 }
2650