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 const struct alps_protocol_info alps_v8_protocol_data = {
 157         ALPS_PROTO_V8, 0x18, 0x18, 0
 158 };
 159
 160 static void alps_set_abs_params_st(struct alps_data *priv,
 161                                    struct input_dev *dev1);
 162 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
 163                                         struct input_dev *dev1);
 164 static void alps_set_abs_params_v7(struct alps_data *priv,
 165                                    struct input_dev *dev1);
 166 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
 167                                        struct input_dev *dev1);
 168
 169 /* Packet formats are described in Documentation/input/alps.txt */
 170
 171 static bool alps_is_valid_first_byte(struct alps_data *priv,
 172                                      unsigned char data)
 173 {
 174         return (data & priv->mask0) == priv->byte0;
 175 }
 176
 177 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
 178                                 int left, int right, int middle)
 179 {
 180         struct input_dev *dev;
 181
 182         /*
 183          * If shared button has already been reported on the
 184          * other device (dev2) then this event should be also
 185          * sent through that device.
 186          */
 187         dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
 188         input_report_key(dev, BTN_LEFT, left);
 189
 190         dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
 191         input_report_key(dev, BTN_RIGHT, right);
 192
 193         dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
 194         input_report_key(dev, BTN_MIDDLE, middle);
 195
 196         /*
 197          * Sync the _other_ device now, we'll do the first
 198          * device later once we report the rest of the events.
 199          */
 200         if (dev2)
 201                 input_sync(dev2);
 202 }
 203
 204 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
 205 {
 206         struct alps_data *priv = psmouse->private;
 207         unsigned char *packet = psmouse->packet;
 208         struct input_dev *dev = psmouse->dev;
 209         struct input_dev *dev2 = priv->dev2;
 210         int x, y, z, ges, fin, left, right, middle;
 211         int back = 0, forward = 0;
 212
 213         if (priv->proto_version == ALPS_PROTO_V1) {
 214                 left = packet[2] & 0x10;
 215                 right = packet[2] & 0x08;
 216                 middle = 0;
 217                 x = packet[1] | ((packet[0] & 0x07) << 7);
 218                 y = packet[4] | ((packet[3] & 0x07) << 7);
 219                 z = packet[5];
 220         } else {
 221                 left = packet[3] & 1;
 222                 right = packet[3] & 2;
 223                 middle = packet[3] & 4;
 224                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 225                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 226                 z = packet[5];
 227         }
 228
 229         if (priv->flags & ALPS_FW_BK_1) {
 230                 back = packet[0] & 0x10;
 231                 forward = packet[2] & 4;
 232         }
 233
 234         if (priv->flags & ALPS_FW_BK_2) {
 235                 back = packet[3] & 4;
 236                 forward = packet[2] & 4;
 237                 if ((middle = forward && back))
 238                         forward = back = 0;
 239         }
 240
 241         ges = packet[2] & 1;
 242         fin = packet[2] & 2;
 243
 244         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
 245                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 246                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 247
 248                 alps_report_buttons(dev2, dev, left, right, middle);
 249
 250                 input_sync(dev2);
 251                 return;
 252         }
 253
 254         /* Non interleaved V2 dualpoint has separate stick button bits */
 255         if (priv->proto_version == ALPS_PROTO_V2 &&
 256             priv->flags == (ALPS_PASS | ALPS_DUALPOINT)) {
 257                 left |= packet[0] & 1;
 258                 right |= packet[0] & 2;
 259                 middle |= packet[0] & 4;
 260         }
 261
 262         alps_report_buttons(dev, dev2, left, right, middle);
 263
 264         /* Convert hardware tap to a reasonable Z value */
 265         if (ges && !fin)
 266                 z = 40;
 267
 268         /*
 269          * A "tap and drag" operation is reported by the hardware as a transition
 270          * from (!fin && ges) to (fin && ges). This should be translated to the
 271          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 272          */
 273         if (ges && fin && !priv->prev_fin) {
 274                 input_report_abs(dev, ABS_X, x);
 275                 input_report_abs(dev, ABS_Y, y);
 276                 input_report_abs(dev, ABS_PRESSURE, 0);
 277                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 278                 input_sync(dev);
 279         }
 280         priv->prev_fin = fin;
 281
 282         if (z > 30)
 283                 input_report_key(dev, BTN_TOUCH, 1);
 284         if (z < 25)
 285                 input_report_key(dev, BTN_TOUCH, 0);
 286
 287         if (z > 0) {
 288                 input_report_abs(dev, ABS_X, x);
 289                 input_report_abs(dev, ABS_Y, y);
 290         }
 291
 292         input_report_abs(dev, ABS_PRESSURE, z);
 293         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 294
 295         if (priv->flags & ALPS_WHEEL)
 296                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 297
 298         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 299                 input_report_key(dev, BTN_FORWARD, forward);
 300                 input_report_key(dev, BTN_BACK, back);
 301         }
 302
 303         if (priv->flags & ALPS_FOUR_BUTTONS) {
 304                 input_report_key(dev, BTN_0, packet[2] & 4);
 305                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 306                 input_report_key(dev, BTN_2, packet[3] & 4);
 307                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 308         }
 309
 310         input_sync(dev);
 311 }
 312
 313 static void alps_get_bitmap_points(unsigned int map,
 314                                    struct alps_bitmap_point *low,
 315                                    struct alps_bitmap_point *high,
 316                                    int *fingers)
 317 {
 318         struct alps_bitmap_point *point;
 319         int i, bit, prev_bit = 0;
 320
 321         point = low;
 322         for (i = 0; map != 0; i++, map >>= 1) {
 323                 bit = map & 1;
 324                 if (bit) {
 325                         if (!prev_bit) {
 326                                 point->start_bit = i;
 327                                 point->num_bits = 0;
 328                                 (*fingers)++;
 329                         }
 330                         point->num_bits++;
 331                 } else {
 332                         if (prev_bit)
 333                                 point = high;
 334                 }
 335                 prev_bit = bit;
 336         }
 337 }
 338
 339 /*
 340  * Process bitmap data from semi-mt protocols. Returns the number of
 341  * fingers detected. A return value of 0 means at least one of the
 342  * bitmaps was empty.
 343  *
 344  * The bitmaps don't have enough data to track fingers, so this function
 345  * only generates points representing a bounding box of all contacts.
 346  * These points are returned in fields->mt when the return value
 347  * is greater than 0.
 348  */
 349 static int alps_process_bitmap(struct alps_data *priv,
 350                                struct alps_fields *fields)
 351 {
 352         int i, fingers_x = 0, fingers_y = 0, fingers, closest;
 353         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 354         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 355         struct input_mt_pos corner[4];
 356
 357         if (!fields->x_map || !fields->y_map)
 358                 return 0;
 359
 360         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
 361         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
 362
 363         /*
 364          * Fingers can overlap, so we use the maximum count of fingers
 365          * on either axis as the finger count.
 366          */
 367         fingers = max(fingers_x, fingers_y);
 368
 369         /*
 370          * If an axis reports only a single contact, we have overlapping or
 371          * adjacent fingers. Divide the single contact between the two points.
 372          */
 373         if (fingers_x == 1) {
 374                 i = (x_low.num_bits - 1) / 2;
 375                 x_low.num_bits = x_low.num_bits - i;
 376                 x_high.start_bit = x_low.start_bit + i;
 377                 x_high.num_bits = max(i, 1);
 378         }
 379         if (fingers_y == 1) {
 380                 i = (y_low.num_bits - 1) / 2;
 381                 y_low.num_bits = y_low.num_bits - i;
 382                 y_high.start_bit = y_low.start_bit + i;
 383                 y_high.num_bits = max(i, 1);
 384         }
 385
 386         /* top-left corner */
 387         corner[0].x =
 388                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 389                 (2 * (priv->x_bits - 1));
 390         corner[0].y =
 391                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 392                 (2 * (priv->y_bits - 1));
 393
 394         /* top-right corner */
 395         corner[1].x =
 396                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 397                 (2 * (priv->x_bits - 1));
 398         corner[1].y =
 399                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 400                 (2 * (priv->y_bits - 1));
 401
 402         /* bottom-right corner */
 403         corner[2].x =
 404                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 405                 (2 * (priv->x_bits - 1));
 406         corner[2].y =
 407                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 408                 (2 * (priv->y_bits - 1));
 409
 410         /* bottom-left corner */
 411         corner[3].x =
 412                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 413                 (2 * (priv->x_bits - 1));
 414         corner[3].y =
 415                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 416                 (2 * (priv->y_bits - 1));
 417
 418         /* x-bitmap order is reversed on v5 touchpads  */
 419         if (priv->proto_version == ALPS_PROTO_V5) {
 420                 for (i = 0; i < 4; i++)
 421                         corner[i].x = priv->x_max - corner[i].x;
 422         }
 423
 424         /* y-bitmap order is reversed on v3 and v4 touchpads  */
 425         if (priv->proto_version == ALPS_PROTO_V3 ||
 426             priv->proto_version == ALPS_PROTO_V4) {
 427                 for (i = 0; i < 4; i++)
 428                         corner[i].y = priv->y_max - corner[i].y;
 429         }
 430
 431         /*
 432          * We only select a corner for the second touch once per 2 finger
 433          * touch sequence to avoid the chosen corner (and thus the coordinates)
 434          * jumping around when the first touch is in the middle.
 435          */
 436         if (priv->second_touch == -1) {
 437                 /* Find corner closest to our st coordinates */
 438                 closest = 0x7fffffff;
 439                 for (i = 0; i < 4; i++) {
 440                         int dx = fields->st.x - corner[i].x;
 441                         int dy = fields->st.y - corner[i].y;
 442                         int distance = dx * dx + dy * dy;
 443
 444                         if (distance < closest) {
 445                                 priv->second_touch = i;
 446                                 closest = distance;
 447                         }
 448                 }
 449                 /* And select the opposite corner to use for the 2nd touch */
 450                 priv->second_touch = (priv->second_touch + 2) % 4;
 451         }
 452
 453         fields->mt[0] = fields->st;
 454         fields->mt[1] = corner[priv->second_touch];
 455
 456         return fingers;
 457 }
 458
 459 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
 460 {
 461         input_mt_slot(dev, slot);
 462         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 463         input_report_abs(dev, ABS_MT_POSITION_X, x);
 464         input_report_abs(dev, ABS_MT_POSITION_Y, y);
 465 }
 466
 467 static void alps_report_mt_data(struct psmouse *psmouse, int n)
 468 {
 469         struct alps_data *priv = psmouse->private;
 470         struct input_dev *dev = psmouse->dev;
 471         struct alps_fields *f = &priv->f;
 472         int i, slot[MAX_TOUCHES];
 473
 474         input_mt_assign_slots(dev, slot, f->mt, n, 0);
 475         for (i = 0; i < n; i++)
 476                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
 477
 478         input_mt_sync_frame(dev);
 479 }
 480
 481 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
 482 {
 483         struct alps_data *priv = psmouse->private;
 484         struct input_dev *dev = psmouse->dev;
 485         struct alps_fields *f = &priv->f;
 486
 487         /* Use st data when we don't have mt data */
 488         if (fingers < 2) {
 489                 f->mt[0].x = f->st.x;
 490                 f->mt[0].y = f->st.y;
 491                 fingers = f->pressure > 0 ? 1 : 0;
 492                 priv->second_touch = -1;
 493         }
 494
 495         if (fingers >= 1)
 496                 alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y);
 497         if (fingers >= 2)
 498                 alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y);
 499         input_mt_sync_frame(dev);
 500
 501         input_mt_report_finger_count(dev, fingers);
 502
 503         input_report_key(dev, BTN_LEFT, f->left);
 504         input_report_key(dev, BTN_RIGHT, f->right);
 505         input_report_key(dev, BTN_MIDDLE, f->middle);
 506
 507         input_report_abs(dev, ABS_PRESSURE, f->pressure);
 508
 509         input_sync(dev);
 510 }
 511
 512 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 513 {
 514         struct alps_data *priv = psmouse->private;
 515         unsigned char *packet = psmouse->packet;
 516         struct input_dev *dev = priv->dev2;
 517         int x, y, z, left, right, middle;
 518
 519         /* It should be a DualPoint when received trackstick packet */
 520         if (!(priv->flags & ALPS_DUALPOINT)) {
 521                 psmouse_warn(psmouse,
 522                              "Rejected trackstick packet from non DualPoint device");
 523                 return;
 524         }
 525
 526         /* Sanity check packet */
 527         if (!(packet[0] & 0x40)) {
 528                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 529                 return;
 530         }
 531
 532         /*
 533          * There's a special packet that seems to indicate the end
 534          * of a stream of trackstick data. Filter these out.
 535          */
 536         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 537                 return;
 538
 539         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 540         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 541         z = (packet[4] & 0x7c) >> 2;
 542
 543         /*
 544          * The x and y values tend to be quite large, and when used
 545          * alone the trackstick is difficult to use. Scale them down
 546          * to compensate.
 547          */
 548         x /= 8;
 549         y /= 8;
 550
 551         input_report_rel(dev, REL_X, x);
 552         input_report_rel(dev, REL_Y, -y);
 553
 554         /*
 555          * Most ALPS models report the trackstick buttons in the touchpad
 556          * packets, but a few report them here. No reliable way has been
 557          * found to differentiate between the models upfront, so we enable
 558          * the quirk in response to seeing a button press in the trackstick
 559          * packet.
 560          */
 561         left = packet[3] & 0x01;
 562         right = packet[3] & 0x02;
 563         middle = packet[3] & 0x04;
 564
 565         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 566             (left || right || middle))
 567                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 568
 569         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 570                 input_report_key(dev, BTN_LEFT, left);
 571                 input_report_key(dev, BTN_RIGHT, right);
 572                 input_report_key(dev, BTN_MIDDLE, middle);
 573         }
 574
 575         input_sync(dev);
 576         return;
 577 }
 578
 579 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 580 {
 581         f->left = !!(p[3] & 0x01);
 582         f->right = !!(p[3] & 0x02);
 583         f->middle = !!(p[3] & 0x04);
 584
 585         f->ts_left = !!(p[3] & 0x10);
 586         f->ts_right = !!(p[3] & 0x20);
 587         f->ts_middle = !!(p[3] & 0x40);
 588 }
 589
 590 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 591                                  struct psmouse *psmouse)
 592 {
 593         f->first_mp = !!(p[4] & 0x40);
 594         f->is_mp = !!(p[0] & 0x40);
 595
 596         if (f->is_mp) {
 597                 f->fingers = (p[5] & 0x3) + 1;
 598                 f->x_map = ((p[4] & 0x7e) << 8) |
 599                            ((p[1] & 0x7f) << 2) |
 600                            ((p[0] & 0x30) >> 4);
 601                 f->y_map = ((p[3] & 0x70) << 4) |
 602                            ((p[2] & 0x7f) << 1) |
 603                            (p[4] & 0x01);
 604         } else {
 605                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 606                        ((p[0] & 0x30) >> 4);
 607                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 608                 f->pressure = p[5] & 0x7f;
 609
 610                 alps_decode_buttons_v3(f, p);
 611         }
 612
 613         return 0;
 614 }
 615
 616 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 617                                  struct psmouse *psmouse)
 618 {
 619         f->first_mp = !!(p[4] & 0x40);
 620         f->is_mp = !!(p[5] & 0x40);
 621
 622         if (f->is_mp) {
 623                 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
 624                 f->x_map = ((p[5] & 0x10) << 11) |
 625                            ((p[4] & 0x7e) << 8) |
 626                            ((p[1] & 0x7f) << 2) |
 627                            ((p[0] & 0x30) >> 4);
 628                 f->y_map = ((p[5] & 0x20) << 6) |
 629                            ((p[3] & 0x70) << 4) |
 630                            ((p[2] & 0x7f) << 1) |
 631                            (p[4] & 0x01);
 632         } else {
 633                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 634                        ((p[0] & 0x30) >> 4);
 635                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 636                 f->pressure = p[5] & 0x7f;
 637
 638                 alps_decode_buttons_v3(f, p);
 639         }
 640
 641         return 0;
 642 }
 643
 644 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 645                                 struct psmouse *psmouse)
 646 {
 647         u64 palm_data = 0;
 648         struct alps_data *priv = psmouse->private;
 649
 650         f->first_mp = !!(p[0] & 0x02);
 651         f->is_mp = !!(p[0] & 0x20);
 652
 653         if (!f->is_mp) {
 654                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 655                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 656                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
 657                 alps_decode_buttons_v3(f, p);
 658         } else {
 659                 f->fingers = ((p[0] & 0x6) >> 1 |
 660                      (p[0] & 0x10) >> 2);
 661
 662                 palm_data = (p[1] & 0x7f) |
 663                             ((p[2] & 0x7f) << 7) |
 664                             ((p[4] & 0x7f) << 14) |
 665                             ((p[5] & 0x7f) << 21) |
 666                             ((p[3] & 0x07) << 28) |
 667                             (((u64)p[3] & 0x70) << 27) |
 668                             (((u64)p[0] & 0x01) << 34);
 669
 670                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
 671                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
 672
 673                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
 674                 f->x_map = (palm_data >> priv->y_bits) &
 675                            (BIT(priv->x_bits) - 1);
 676         }
 677
 678         return 0;
 679 }
 680
 681 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 682 {
 683         struct alps_data *priv = psmouse->private;
 684         unsigned char *packet = psmouse->packet;
 685         struct input_dev *dev2 = priv->dev2;
 686         struct alps_fields *f = &priv->f;
 687         int fingers = 0;
 688
 689         memset(f, 0, sizeof(*f));
 690
 691         priv->decode_fields(f, packet, psmouse);
 692
 693         /*
 694          * There's no single feature of touchpad position and bitmap packets
 695          * that can be used to distinguish between them. We rely on the fact
 696          * that a bitmap packet should always follow a position packet with
 697          * bit 6 of packet[4] set.
 698          */
 699         if (priv->multi_packet) {
 700                 /*
 701                  * Sometimes a position packet will indicate a multi-packet
 702                  * sequence, but then what follows is another position
 703                  * packet. Check for this, and when it happens process the
 704                  * position packet as usual.
 705                  */
 706                 if (f->is_mp) {
 707                         fingers = f->fingers;
 708                         /*
 709                          * Bitmap processing uses position packet's coordinate
 710                          * data, so we need to do decode it first.
 711                          */
 712                         priv->decode_fields(f, priv->multi_data, psmouse);
 713                         if (alps_process_bitmap(priv, f) == 0)
 714                                 fingers = 0; /* Use st data */
 715                 } else {
 716                         priv->multi_packet = 0;
 717                 }
 718         }
 719
 720         /*
 721          * Bit 6 of byte 0 is not usually set in position packets. The only
 722          * times it seems to be set is in situations where the data is
 723          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 724          * this combined with the fact that this bit is useful for filtering
 725          * out misidentified bitmap packets, we reject anything with this
 726          * bit set.
 727          */
 728         if (f->is_mp)
 729                 return;
 730
 731         if (!priv->multi_packet && f->first_mp) {
 732                 priv->multi_packet = 1;
 733                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 734                 return;
 735         }
 736
 737         priv->multi_packet = 0;
 738
 739         /*
 740          * Sometimes the hardware sends a single packet with z = 0
 741          * in the middle of a stream. Real releases generate packets
 742          * with x, y, and z all zero, so these seem to be flukes.
 743          * Ignore them.
 744          */
 745         if (f->st.x && f->st.y && !f->pressure)
 746                 return;
 747
 748         alps_report_semi_mt_data(psmouse, fingers);
 749
 750         if ((priv->flags & ALPS_DUALPOINT) &&
 751             !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 752                 input_report_key(dev2, BTN_LEFT, f->ts_left);
 753                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
 754                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
 755                 input_sync(dev2);
 756         }
 757 }
 758
 759 static void alps_process_packet_v3(struct psmouse *psmouse)
 760 {
 761         unsigned char *packet = psmouse->packet;
 762
 763         /*
 764          * v3 protocol packets come in three types, two representing
 765          * touchpad data and one representing trackstick data.
 766          * Trackstick packets seem to be distinguished by always
 767          * having 0x3f in the last byte. This value has never been
 768          * observed in the last byte of either of the other types
 769          * of packets.
 770          */
 771         if (packet[5] == 0x3f) {
 772                 alps_process_trackstick_packet_v3(psmouse);
 773                 return;
 774         }
 775
 776         alps_process_touchpad_packet_v3_v5(psmouse);
 777 }
 778
 779 static void alps_process_packet_v6(struct psmouse *psmouse)
 780 {
 781         struct alps_data *priv = psmouse->private;
 782         unsigned char *packet = psmouse->packet;
 783         struct input_dev *dev = psmouse->dev;
 784         struct input_dev *dev2 = priv->dev2;
 785         int x, y, z, left, right, middle;
 786
 787         /*
 788          * We can use Byte5 to distinguish if the packet is from Touchpad
 789          * or Trackpoint.
 790          * Touchpad:    0 - 0x7E
 791          * Trackpoint:  0x7F
 792          */
 793         if (packet[5] == 0x7F) {
 794                 /* It should be a DualPoint when received Trackpoint packet */
 795                 if (!(priv->flags & ALPS_DUALPOINT)) {
 796                         psmouse_warn(psmouse,
 797                                      "Rejected trackstick packet from non DualPoint device");
 798                         return;
 799                 }
 800
 801                 /* Trackpoint packet */
 802                 x = packet[1] | ((packet[3] & 0x20) << 2);
 803                 y = packet[2] | ((packet[3] & 0x40) << 1);
 804                 z = packet[4];
 805                 left = packet[3] & 0x01;
 806                 right = packet[3] & 0x02;
 807                 middle = packet[3] & 0x04;
 808
 809                 /* To prevent the cursor jump when finger lifted */
 810                 if (x == 0x7F && y == 0x7F && z == 0x7F)
 811                         x = y = z = 0;
 812
 813                 /* Divide 4 since trackpoint's speed is too fast */
 814                 input_report_rel(dev2, REL_X, (char)x / 4);
 815                 input_report_rel(dev2, REL_Y, -((char)y / 4));
 816
 817                 input_report_key(dev2, BTN_LEFT, left);
 818                 input_report_key(dev2, BTN_RIGHT, right);
 819                 input_report_key(dev2, BTN_MIDDLE, middle);
 820
 821                 input_sync(dev2);
 822                 return;
 823         }
 824
 825         /* Touchpad packet */
 826         x = packet[1] | ((packet[3] & 0x78) << 4);
 827         y = packet[2] | ((packet[4] & 0x78) << 4);
 828         z = packet[5];
 829         left = packet[3] & 0x01;
 830         right = packet[3] & 0x02;
 831
 832         if (z > 30)
 833                 input_report_key(dev, BTN_TOUCH, 1);
 834         if (z < 25)
 835                 input_report_key(dev, BTN_TOUCH, 0);
 836
 837         if (z > 0) {
 838                 input_report_abs(dev, ABS_X, x);
 839                 input_report_abs(dev, ABS_Y, y);
 840         }
 841
 842         input_report_abs(dev, ABS_PRESSURE, z);
 843         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 844
 845         /* v6 touchpad does not have middle button */
 846         input_report_key(dev, BTN_LEFT, left);
 847         input_report_key(dev, BTN_RIGHT, right);
 848
 849         input_sync(dev);
 850 }
 851
 852 static void alps_process_packet_v4(struct psmouse *psmouse)
 853 {
 854         struct alps_data *priv = psmouse->private;
 855         unsigned char *packet = psmouse->packet;
 856         struct alps_fields *f = &priv->f;
 857         int offset;
 858
 859         /*
 860          * v4 has a 6-byte encoding for bitmap data, but this data is
 861          * broken up between 3 normal packets. Use priv->multi_packet to
 862          * track our position in the bitmap packet.
 863          */
 864         if (packet[6] & 0x40) {
 865                 /* sync, reset position */
 866                 priv->multi_packet = 0;
 867         }
 868
 869         if (WARN_ON_ONCE(priv->multi_packet > 2))
 870                 return;
 871
 872         offset = 2 * priv->multi_packet;
 873         priv->multi_data[offset] = packet[6];
 874         priv->multi_data[offset + 1] = packet[7];
 875
 876         f->left = !!(packet[4] & 0x01);
 877         f->right = !!(packet[4] & 0x02);
 878
 879         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 880                   ((packet[0] & 0x30) >> 4);
 881         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 882         f->pressure = packet[5] & 0x7f;
 883
 884         if (++priv->multi_packet > 2) {
 885                 priv->multi_packet = 0;
 886
 887                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
 888                            ((priv->multi_data[3] & 0x60) << 3) |
 889                            ((priv->multi_data[0] & 0x3f) << 2) |
 890                            ((priv->multi_data[1] & 0x60) >> 5);
 891                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
 892                            ((priv->multi_data[3] & 0x1f) << 5) |
 893                             (priv->multi_data[1] & 0x1f);
 894
 895                 f->fingers = alps_process_bitmap(priv, f);
 896         }
 897
 898         alps_report_semi_mt_data(psmouse, f->fingers);
 899 }
 900
 901 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
 902 {
 903         switch (psmouse->pktcnt) {
 904         case 3:
 905                 return (psmouse->packet[2] & 0x40) == 0x40;
 906         case 4:
 907                 return (psmouse->packet[3] & 0x48) == 0x48;
 908         case 6:
 909                 return (psmouse->packet[5] & 0x40) == 0x00;
 910         }
 911         return true;
 912 }
 913
 914 static unsigned char alps_get_packet_id_v7(char *byte)
 915 {
 916         unsigned char packet_id;
 917
 918         if (byte[4] & 0x40)
 919                 packet_id = V7_PACKET_ID_TWO;
 920         else if (byte[4] & 0x01)
 921                 packet_id = V7_PACKET_ID_MULTI;
 922         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
 923                 packet_id = V7_PACKET_ID_NEW;
 924         else if (byte[1] == 0x00 && byte[4] == 0x00)
 925                 packet_id = V7_PACKET_ID_IDLE;
 926         else
 927                 packet_id = V7_PACKET_ID_UNKNOWN;
 928
 929         return packet_id;
 930 }
 931
 932 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
 933                                           unsigned char *pkt,
 934                                           unsigned char pkt_id)
 935 {
 936         mt[0].x = ((pkt[2] & 0x80) << 4);
 937         mt[0].x |= ((pkt[2] & 0x3F) << 5);
 938         mt[0].x |= ((pkt[3] & 0x30) >> 1);
 939         mt[0].x |= (pkt[3] & 0x07);
 940         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
 941
 942         mt[1].x = ((pkt[3] & 0x80) << 4);
 943         mt[1].x |= ((pkt[4] & 0x80) << 3);
 944         mt[1].x |= ((pkt[4] & 0x3F) << 4);
 945         mt[1].y = ((pkt[5] & 0x80) << 3);
 946         mt[1].y |= ((pkt[5] & 0x3F) << 4);
 947
 948         switch (pkt_id) {
 949         case V7_PACKET_ID_TWO:
 950                 mt[1].x &= ~0x000F;
 951                 mt[1].y |= 0x000F;
 952                 /* Detect false-postive touches where x & y report max value */
 953                 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
 954                         mt[1].x = 0;
 955                         /* y gets set to 0 at the end of this function */
 956                 }
 957                 break;
 958
 959         case V7_PACKET_ID_MULTI:
 960                 mt[1].x &= ~0x003F;
 961                 mt[1].y &= ~0x0020;
 962                 mt[1].y |= ((pkt[4] & 0x02) << 4);
 963                 mt[1].y |= 0x001F;
 964                 break;
 965
 966         case V7_PACKET_ID_NEW:
 967                 mt[1].x &= ~0x003F;
 968                 mt[1].x |= (pkt[0] & 0x20);
 969                 mt[1].y |= 0x000F;
 970                 break;
 971         }
 972
 973         mt[0].y = 0x7FF - mt[0].y;
 974         mt[1].y = 0x7FF - mt[1].y;
 975 }
 976
 977 static int alps_get_mt_count(struct input_mt_pos *mt)
 978 {
 979         int i, fingers = 0;
 980
 981         for (i = 0; i < MAX_TOUCHES; i++) {
 982                 if (mt[i].x != 0 || mt[i].y != 0)
 983                         fingers++;
 984         }
 985
 986         return fingers;
 987 }
 988
 989 static int alps_decode_packet_v7(struct alps_fields *f,
 990                                   unsigned char *p,
 991                                   struct psmouse *psmouse)
 992 {
 993         struct alps_data *priv = psmouse->private;
 994         unsigned char pkt_id;
 995
 996         pkt_id = alps_get_packet_id_v7(p);
 997         if (pkt_id == V7_PACKET_ID_IDLE)
 998                 return 0;
 999         if (pkt_id == V7_PACKET_ID_UNKNOWN)
1000                 return -1;
1001         /*
1002          * NEW packets are send to indicate a discontinuity in the finger
1003          * coordinate reporting. Specifically a finger may have moved from
1004          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
1005          * us.
1006          *
1007          * NEW packets have 3 problems:
1008          * 1) They do not contain middle / right button info (on non clickpads)
1009          *    this can be worked around by preserving the old button state
1010          * 2) They do not contain an accurate fingercount, and they are
1011          *    typically send when the number of fingers changes. We cannot use
1012          *    the old finger count as that may mismatch with the amount of
1013          *    touch coordinates we've available in the NEW packet
1014          * 3) Their x data for the second touch is inaccurate leading to
1015          *    a possible jump of the x coordinate by 16 units when the first
1016          *    non NEW packet comes in
1017          * Since problems 2 & 3 cannot be worked around, just ignore them.
1018          */
1019         if (pkt_id == V7_PACKET_ID_NEW)
1020                 return 1;
1021
1022         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1023
1024         if (pkt_id == V7_PACKET_ID_TWO)
1025                 f->fingers = alps_get_mt_count(f->mt);
1026         else /* pkt_id == V7_PACKET_ID_MULTI */
1027                 f->fingers = 3 + (p[5] & 0x03);
1028
1029         f->left = (p[0] & 0x80) >> 7;
1030         if (priv->flags & ALPS_BUTTONPAD) {
1031                 if (p[0] & 0x20)
1032                         f->fingers++;
1033                 if (p[0] & 0x10)
1034                         f->fingers++;
1035         } else {
1036                 f->right = (p[0] & 0x20) >> 5;
1037                 f->middle = (p[0] & 0x10) >> 4;
1038         }
1039
1040         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1041         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1042                 f->mt[0].x = f->mt[1].x;
1043                 f->mt[0].y = f->mt[1].y;
1044                 f->mt[1].x = 0;
1045                 f->mt[1].y = 0;
1046         }
1047
1048         return 0;
1049 }
1050
1051 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1052 {
1053         struct alps_data *priv = psmouse->private;
1054         unsigned char *packet = psmouse->packet;
1055         struct input_dev *dev2 = priv->dev2;
1056         int x, y, z, left, right, middle;
1057
1058         /* It should be a DualPoint when received trackstick packet */
1059         if (!(priv->flags & ALPS_DUALPOINT)) {
1060                 psmouse_warn(psmouse,
1061                              "Rejected trackstick packet from non DualPoint device");
1062                 return;
1063         }
1064
1065         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1066         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1067             ((packet[3] & 0x20) << 1);
1068         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1069
1070         left = (packet[1] & 0x01);
1071         right = (packet[1] & 0x02) >> 1;
1072         middle = (packet[1] & 0x04) >> 2;
1073
1074         input_report_rel(dev2, REL_X, (char)x);
1075         input_report_rel(dev2, REL_Y, -((char)y));
1076
1077         input_report_key(dev2, BTN_LEFT, left);
1078         input_report_key(dev2, BTN_RIGHT, right);
1079         input_report_key(dev2, BTN_MIDDLE, middle);
1080
1081         input_sync(dev2);
1082 }
1083
1084 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1085 {
1086         struct alps_data *priv = psmouse->private;
1087         struct input_dev *dev = psmouse->dev;
1088         struct alps_fields *f = &priv->f;
1089
1090         memset(f, 0, sizeof(*f));
1091
1092         if (priv->decode_fields(f, psmouse->packet, psmouse))
1093                 return;
1094
1095         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1096
1097         input_mt_report_finger_count(dev, f->fingers);
1098
1099         input_report_key(dev, BTN_LEFT, f->left);
1100         input_report_key(dev, BTN_RIGHT, f->right);
1101         input_report_key(dev, BTN_MIDDLE, f->middle);
1102
1103         input_sync(dev);
1104 }
1105
1106 static void alps_process_packet_v7(struct psmouse *psmouse)
1107 {
1108         unsigned char *packet = psmouse->packet;
1109
1110         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1111                 alps_process_trackstick_packet_v7(psmouse);
1112         else
1113                 alps_process_touchpad_packet_v7(psmouse);
1114 }
1115
1116 static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)
1117 {
1118         unsigned char pkt_id = SS4_PACKET_ID_IDLE;
1119
1120         if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&
1121             (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) {
1122                 pkt_id = SS4_PACKET_ID_IDLE;
1123         } else if (!(byte[3] & 0x10)) {
1124                 pkt_id = SS4_PACKET_ID_ONE;
1125         } else if (!(byte[3] & 0x20)) {
1126                 pkt_id = SS4_PACKET_ID_TWO;
1127         } else {
1128                 pkt_id = SS4_PACKET_ID_MULTI;
1129         }
1130
1131         return pkt_id;
1132 }
1133
1134 static int alps_decode_ss4_v2(struct alps_fields *f,
1135                               unsigned char *p, struct psmouse *psmouse)
1136 {
1137         struct alps_data *priv = psmouse->private;
1138         unsigned char pkt_id;
1139         unsigned int no_data_x, no_data_y;
1140
1141         pkt_id = alps_get_pkt_id_ss4_v2(p);
1142
1143         /* Current packet is 1Finger coordinate packet */
1144         switch (pkt_id) {
1145         case SS4_PACKET_ID_ONE:
1146                 f->mt[0].x = SS4_1F_X_V2(p);
1147                 f->mt[0].y = SS4_1F_Y_V2(p);
1148                 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1149                 f->fingers = 1;
1150                 f->first_mp = 0;
1151                 f->is_mp = 0;
1152                 break;
1153
1154         case SS4_PACKET_ID_TWO:
1155                 if (priv->flags & ALPS_BUTTONPAD) {
1156                         f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1157                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1158                         f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1159                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1160                 } else {
1161                         f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1162                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1163                         f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1164                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1165                 }
1166                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1167
1168                 if (SS4_IS_MF_CONTINUE(p)) {
1169                         f->first_mp = 1;
1170                 } else {
1171                         f->fingers = 2;
1172                         f->first_mp = 0;
1173                 }
1174                 f->is_mp = 0;
1175
1176                 break;
1177
1178         case SS4_PACKET_ID_MULTI:
1179                 if (priv->flags & ALPS_BUTTONPAD) {
1180                         f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1181                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1182                         f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1183                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1184                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1185                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1186                 } else {
1187                         f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1188                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1189                         f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1190                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1191                         no_data_x = SS4_MFPACKET_NO_AX;
1192                         no_data_y = SS4_MFPACKET_NO_AY;
1193                 }
1194
1195                 f->first_mp = 0;
1196                 f->is_mp = 1;
1197
1198                 if (SS4_IS_5F_DETECTED(p)) {
1199                         f->fingers = 5;
1200                 } else if (f->mt[3].x == no_data_x &&
1201                              f->mt[3].y == no_data_y) {
1202                         f->mt[3].x = 0;
1203                         f->mt[3].y = 0;
1204                         f->fingers = 3;
1205                 } else {
1206                         f->fingers = 4;
1207                 }
1208                 break;
1209
1210         case SS4_PACKET_ID_IDLE:
1211         default:
1212                 memset(f, 0, sizeof(struct alps_fields));
1213                 break;
1214         }
1215
1216         f->left = !!(SS4_BTN_V2(p) & 0x01);
1217         if (!(priv->flags & ALPS_BUTTONPAD)) {
1218                 f->right = !!(SS4_BTN_V2(p) & 0x02);
1219                 f->middle = !!(SS4_BTN_V2(p) & 0x04);
1220         }
1221
1222         return 0;
1223 }
1224
1225 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1226 {
1227         struct alps_data *priv = psmouse->private;
1228         unsigned char *packet = psmouse->packet;
1229         struct input_dev *dev = psmouse->dev;
1230         struct alps_fields *f = &priv->f;
1231
1232         memset(f, 0, sizeof(struct alps_fields));
1233         priv->decode_fields(f, packet, psmouse);
1234         if (priv->multi_packet) {
1235                 /*
1236                  * Sometimes the first packet will indicate a multi-packet
1237                  * sequence, but sometimes the next multi-packet would not
1238                  * come. Check for this, and when it happens process the
1239                  * position packet as usual.
1240                  */
1241                 if (f->is_mp) {
1242                         /* Now process the 1st packet */
1243                         priv->decode_fields(f, priv->multi_data, psmouse);
1244                 } else {
1245                         priv->multi_packet = 0;
1246                 }
1247         }
1248
1249         /*
1250          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1251          * When it is set, it means 2nd packet comes without 1st packet come.
1252          */
1253         if (f->is_mp)
1254                 return;
1255
1256         /* Save the first packet */
1257         if (!priv->multi_packet && f->first_mp) {
1258                 priv->multi_packet = 1;
1259                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1260                 return;
1261         }
1262
1263         priv->multi_packet = 0;
1264
1265         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1266
1267         input_mt_report_finger_count(dev, f->fingers);
1268
1269         input_report_key(dev, BTN_LEFT, f->left);
1270         input_report_key(dev, BTN_RIGHT, f->right);
1271         input_report_key(dev, BTN_MIDDLE, f->middle);
1272
1273         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1274         input_sync(dev);
1275 }
1276
1277 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1278 {
1279         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1280                 return false;
1281         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1282                 return false;
1283         return true;
1284 }
1285
1286 static DEFINE_MUTEX(alps_mutex);
1287
1288 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1289 {
1290         struct alps_data *priv =
1291                 container_of(work, struct alps_data, dev3_register_work.work);
1292         struct psmouse *psmouse = priv->psmouse;
1293         struct input_dev *dev3;
1294         int error = 0;
1295
1296         mutex_lock(&alps_mutex);
1297
1298         if (priv->dev3)
1299                 goto out;
1300
1301         dev3 = input_allocate_device();
1302         if (!dev3) {
1303                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1304                 error = -ENOMEM;
1305                 goto out;
1306         }
1307
1308         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1309                  psmouse->ps2dev.serio->phys,
1310                  (priv->dev2 ? "input2" : "input1"));
1311         dev3->phys = priv->phys3;
1312
1313         /*
1314          * format of input device name is: "protocol vendor name"
1315          * see function psmouse_switch_protocol() in psmouse-base.c
1316          */
1317         dev3->name = "PS/2 ALPS Mouse";
1318
1319         dev3->id.bustype = BUS_I8042;
1320         dev3->id.vendor  = 0x0002;
1321         dev3->id.product = PSMOUSE_PS2;
1322         dev3->id.version = 0x0000;
1323         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1324
1325         input_set_capability(dev3, EV_REL, REL_X);
1326         input_set_capability(dev3, EV_REL, REL_Y);
1327         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1328         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1329         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1330
1331         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1332
1333         error = input_register_device(dev3);
1334         if (error) {
1335                 psmouse_err(psmouse,
1336                             "failed to register secondary device: %d\n",
1337                             error);
1338                 input_free_device(dev3);
1339                 goto out;
1340         }
1341
1342         priv->dev3 = dev3;
1343
1344 out:
1345         /*
1346          * Save the error code so that we can detect that we
1347          * already tried to create the device.
1348          */
1349         if (error)
1350                 priv->dev3 = ERR_PTR(error);
1351
1352         mutex_unlock(&alps_mutex);
1353 }
1354
1355 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1356                                         unsigned char packet[],
1357                                         bool report_buttons)
1358 {
1359         struct alps_data *priv = psmouse->private;
1360         struct input_dev *dev, *dev2 = NULL;
1361
1362         /* Figure out which device to use to report the bare packet */
1363         if (priv->proto_version == ALPS_PROTO_V2 &&
1364             (priv->flags & ALPS_DUALPOINT)) {
1365                 /* On V2 devices the DualPoint Stick reports bare packets */
1366                 dev = priv->dev2;
1367                 dev2 = psmouse->dev;
1368         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1369                 /* Register dev3 mouse if we received PS/2 packet first time */
1370                 if (!IS_ERR(priv->dev3))
1371                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1372                                            0);
1373                 return;
1374         } else {
1375                 dev = priv->dev3;
1376         }
1377
1378         if (report_buttons)
1379                 alps_report_buttons(dev, dev2,
1380                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1381
1382         input_report_rel(dev, REL_X,
1383                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1384         input_report_rel(dev, REL_Y,
1385                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1386
1387         input_sync(dev);
1388 }
1389
1390 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1391 {
1392         struct alps_data *priv = psmouse->private;
1393
1394         if (psmouse->pktcnt < 6)
1395                 return PSMOUSE_GOOD_DATA;
1396
1397         if (psmouse->pktcnt == 6) {
1398                 /*
1399                  * Start a timer to flush the packet if it ends up last
1400                  * 6-byte packet in the stream. Timer needs to fire
1401                  * psmouse core times out itself. 20 ms should be enough
1402                  * to decide if we are getting more data or not.
1403                  */
1404                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1405                 return PSMOUSE_GOOD_DATA;
1406         }
1407
1408         del_timer(&priv->timer);
1409
1410         if (psmouse->packet[6] & 0x80) {
1411
1412                 /*
1413                  * Highest bit is set - that means we either had
1414                  * complete ALPS packet and this is start of the
1415                  * next packet or we got garbage.
1416                  */
1417
1418                 if (((psmouse->packet[3] |
1419                       psmouse->packet[4] |
1420                       psmouse->packet[5]) & 0x80) ||
1421                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1422                         psmouse_dbg(psmouse,
1423                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1424                                     psmouse->packet + 3);
1425                         return PSMOUSE_BAD_DATA;
1426                 }
1427
1428                 priv->process_packet(psmouse);
1429
1430                 /* Continue with the next packet */
1431                 psmouse->packet[0] = psmouse->packet[6];
1432                 psmouse->pktcnt = 1;
1433
1434         } else {
1435
1436                 /*
1437                  * High bit is 0 - that means that we indeed got a PS/2
1438                  * packet in the middle of ALPS packet.
1439                  *
1440                  * There is also possibility that we got 6-byte ALPS
1441                  * packet followed  by 3-byte packet from trackpoint. We
1442                  * can not distinguish between these 2 scenarios but
1443                  * because the latter is unlikely to happen in course of
1444                  * normal operation (user would need to press all
1445                  * buttons on the pad and start moving trackpoint
1446                  * without touching the pad surface) we assume former.
1447                  * Even if we are wrong the wost thing that would happen
1448                  * the cursor would jump but we should not get protocol
1449                  * de-synchronization.
1450                  */
1451
1452                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1453                                             false);
1454
1455                 /*
1456                  * Continue with the standard ALPS protocol handling,
1457                  * but make sure we won't process it as an interleaved
1458                  * packet again, which may happen if all buttons are
1459                  * pressed. To avoid this let's reset the 4th bit which
1460                  * is normally 1.
1461                  */
1462                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1463                 psmouse->pktcnt = 4;
1464         }
1465
1466         return PSMOUSE_GOOD_DATA;
1467 }
1468
1469 static void alps_flush_packet(unsigned long data)
1470 {
1471         struct psmouse *psmouse = (struct psmouse *)data;
1472         struct alps_data *priv = psmouse->private;
1473
1474         serio_pause_rx(psmouse->ps2dev.serio);
1475
1476         if (psmouse->pktcnt == psmouse->pktsize) {
1477
1478                 /*
1479                  * We did not any more data in reasonable amount of time.
1480                  * Validate the last 3 bytes and process as a standard
1481                  * ALPS packet.
1482                  */
1483                 if ((psmouse->packet[3] |
1484                      psmouse->packet[4] |
1485                      psmouse->packet[5]) & 0x80) {
1486                         psmouse_dbg(psmouse,
1487                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1488                                     psmouse->packet + 3);
1489                 } else {
1490                         priv->process_packet(psmouse);
1491                 }
1492                 psmouse->pktcnt = 0;
1493         }
1494
1495         serio_continue_rx(psmouse->ps2dev.serio);
1496 }
1497
1498 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1499 {
1500         struct alps_data *priv = psmouse->private;
1501
1502         /*
1503          * Check if we are dealing with a bare PS/2 packet, presumably from
1504          * a device connected to the external PS/2 port. Because bare PS/2
1505          * protocol does not have enough constant bits to self-synchronize
1506          * properly we only do this if the device is fully synchronized.
1507          * Can not distinguish V8's first byte from PS/2 packet's
1508          */
1509         if (priv->proto_version != ALPS_PROTO_V8 &&
1510             !psmouse->out_of_sync_cnt &&
1511             (psmouse->packet[0] & 0xc8) == 0x08) {
1512
1513                 if (psmouse->pktcnt == 3) {
1514                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1515                                                     true);
1516                         return PSMOUSE_FULL_PACKET;
1517                 }
1518                 return PSMOUSE_GOOD_DATA;
1519         }
1520
1521         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1522
1523         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1524             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1525                 return alps_handle_interleaved_ps2(psmouse);
1526         }
1527
1528         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1529                 psmouse_dbg(psmouse,
1530                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1531                             psmouse->packet[0], priv->mask0, priv->byte0);
1532                 return PSMOUSE_BAD_DATA;
1533         }
1534
1535         /* Bytes 2 - pktsize should have 0 in the highest bit */
1536         if (priv->proto_version < ALPS_PROTO_V5 &&
1537             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1538             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1539                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1540                             psmouse->pktcnt - 1,
1541                             psmouse->packet[psmouse->pktcnt - 1]);
1542
1543                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1544                     psmouse->pktcnt == psmouse->pktsize) {
1545                         /*
1546                          * Some Dell boxes, such as Latitude E6440 or E7440
1547                          * with closed lid, quite often smash last byte of
1548                          * otherwise valid packet with 0xff. Given that the
1549                          * next packet is very likely to be valid let's
1550                          * report PSMOUSE_FULL_PACKET but not process data,
1551                          * rather than reporting PSMOUSE_BAD_DATA and
1552                          * filling the logs.
1553                          */
1554                         return PSMOUSE_FULL_PACKET;
1555                 }
1556
1557                 return PSMOUSE_BAD_DATA;
1558         }
1559
1560         if ((priv->proto_version == ALPS_PROTO_V7 &&
1561                         !alps_is_valid_package_v7(psmouse)) ||
1562             (priv->proto_version == ALPS_PROTO_V8 &&
1563                         !alps_is_valid_package_ss4_v2(psmouse))) {
1564                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1565                             psmouse->pktcnt - 1,
1566                             psmouse->packet[psmouse->pktcnt - 1]);
1567                 return PSMOUSE_BAD_DATA;
1568         }
1569
1570         if (psmouse->pktcnt == psmouse->pktsize) {
1571                 priv->process_packet(psmouse);
1572                 return PSMOUSE_FULL_PACKET;
1573         }
1574
1575         return PSMOUSE_GOOD_DATA;
1576 }
1577
1578 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1579 {
1580         struct ps2dev *ps2dev = &psmouse->ps2dev;
1581         struct alps_data *priv = psmouse->private;
1582         int command;
1583         unsigned char *param;
1584         unsigned char dummy[4];
1585
1586         BUG_ON(nibble > 0xf);
1587
1588         command = priv->nibble_commands[nibble].command;
1589         param = (command & 0x0f00) ?
1590                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1591
1592         if (ps2_command(ps2dev, param, command))
1593                 return -1;
1594
1595         return 0;
1596 }
1597
1598 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1599 {
1600         struct ps2dev *ps2dev = &psmouse->ps2dev;
1601         struct alps_data *priv = psmouse->private;
1602         int i, nibble;
1603
1604         if (ps2_command(ps2dev, NULL, priv->addr_command))
1605                 return -1;
1606
1607         for (i = 12; i >= 0; i -= 4) {
1608                 nibble = (addr >> i) & 0xf;
1609                 if (alps_command_mode_send_nibble(psmouse, nibble))
1610                         return -1;
1611         }
1612
1613         return 0;
1614 }
1615
1616 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1617 {
1618         struct ps2dev *ps2dev = &psmouse->ps2dev;
1619         unsigned char param[4];
1620
1621         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1622                 return -1;
1623
1624         /*
1625          * The address being read is returned in the first two bytes
1626          * of the result. Check that this address matches the expected
1627          * address.
1628          */
1629         if (addr != ((param[0] << 8) | param[1]))
1630                 return -1;
1631
1632         return param[2];
1633 }
1634
1635 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1636 {
1637         if (alps_command_mode_set_addr(psmouse, addr))
1638                 return -1;
1639         return __alps_command_mode_read_reg(psmouse, addr);
1640 }
1641
1642 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1643 {
1644         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1645                 return -1;
1646         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1647                 return -1;
1648         return 0;
1649 }
1650
1651 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1652                                        u8 value)
1653 {
1654         if (alps_command_mode_set_addr(psmouse, addr))
1655                 return -1;
1656         return __alps_command_mode_write_reg(psmouse, value);
1657 }
1658
1659 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1660                         int repeated_command, unsigned char *param)
1661 {
1662         struct ps2dev *ps2dev = &psmouse->ps2dev;
1663
1664         param[0] = 0;
1665         if (init_command && ps2_command(ps2dev, param, init_command))
1666                 return -EIO;
1667
1668         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1669             ps2_command(ps2dev,  NULL, repeated_command) ||
1670             ps2_command(ps2dev,  NULL, repeated_command))
1671                 return -EIO;
1672
1673         param[0] = param[1] = param[2] = 0xff;
1674         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1675                 return -EIO;
1676
1677         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1678                     repeated_command, param);
1679         return 0;
1680 }
1681
1682 static bool alps_check_valid_firmware_id(unsigned char id[])
1683 {
1684         if (id[0] == 0x73)
1685                 return true;
1686
1687         if (id[0] == 0x88 &&
1688             (id[1] == 0x07 ||
1689              id[1] == 0x08 ||
1690              (id[1] & 0xf0) == 0xb0 ||
1691              (id[1] & 0xf0) == 0xc0)) {
1692                 return true;
1693         }
1694
1695         return false;
1696 }
1697
1698 static int alps_enter_command_mode(struct psmouse *psmouse)
1699 {
1700         unsigned char param[4];
1701
1702         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1703                 psmouse_err(psmouse, "failed to enter command mode\n");
1704                 return -1;
1705         }
1706
1707         if (!alps_check_valid_firmware_id(param)) {
1708                 psmouse_dbg(psmouse,
1709                             "unknown response while entering command mode\n");
1710                 return -1;
1711         }
1712         return 0;
1713 }
1714
1715 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1716 {
1717         struct ps2dev *ps2dev = &psmouse->ps2dev;
1718         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1719                 return -1;
1720         return 0;
1721 }
1722
1723 /*
1724  * For DualPoint devices select the device that should respond to
1725  * subsequent commands. It looks like glidepad is behind stickpointer,
1726  * I'd thought it would be other way around...
1727  */
1728 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1729 {
1730         struct ps2dev *ps2dev = &psmouse->ps2dev;
1731         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1732
1733         if (ps2_command(ps2dev, NULL, cmd) ||
1734             ps2_command(ps2dev, NULL, cmd) ||
1735             ps2_command(ps2dev, NULL, cmd) ||
1736             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1737                 return -1;
1738
1739         /* we may get 3 more bytes, just ignore them */
1740         ps2_drain(ps2dev, 3, 100);
1741
1742         return 0;
1743 }
1744
1745 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1746 {
1747         struct ps2dev *ps2dev = &psmouse->ps2dev;
1748
1749         /* Try ALPS magic knock - 4 disable before enable */
1750         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1751             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1752             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1753             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1754             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1755                 return -1;
1756
1757         /*
1758          * Switch mouse to poll (remote) mode so motion data will not
1759          * get in our way
1760          */
1761         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1762 }
1763
1764 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1765 {
1766         int i, nibble;
1767
1768         /*
1769          * b0-b11 are valid bits, send sequence is inverse.
1770          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1771          */
1772         for (i = 0; i <= 8; i += 4) {
1773                 nibble = (word >> i) & 0xf;
1774                 if (alps_command_mode_send_nibble(psmouse, nibble))
1775                         return -1;
1776         }
1777
1778         return 0;
1779 }
1780
1781 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1782                                        u16 addr, u16 value)
1783 {
1784         struct ps2dev *ps2dev = &psmouse->ps2dev;
1785
1786         /* 0x0A0 is the command to write the word */
1787         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1788             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1789             alps_monitor_mode_send_word(psmouse, addr) ||
1790             alps_monitor_mode_send_word(psmouse, value) ||
1791             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1792                 return -1;
1793
1794         return 0;
1795 }
1796
1797 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1798 {
1799         struct ps2dev *ps2dev = &psmouse->ps2dev;
1800
1801         if (enable) {
1802                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1803                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1804                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1805                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1806                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1807                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1808                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1809                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1810                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1811                         return -1;
1812         } else {
1813                 /* EC to exit monitor mode */
1814                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1815                         return -1;
1816         }
1817
1818         return 0;
1819 }
1820
1821 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1822 {
1823         u16 reg_val = 0x181;
1824         int ret = -1;
1825
1826         /* enter monitor mode, to write the register */
1827         if (alps_monitor_mode(psmouse, true))
1828                 return -1;
1829
1830         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1831
1832         if (alps_monitor_mode(psmouse, false))
1833                 ret = -1;
1834
1835         return ret;
1836 }
1837
1838 static int alps_get_status(struct psmouse *psmouse, char *param)
1839 {
1840         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1841         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1842                 return -1;
1843
1844         return 0;
1845 }
1846
1847 /*
1848  * Turn touchpad tapping on or off. The sequences are:
1849  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1850  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1851  * My guess that 0xE9 (GetInfo) is here as a sync point.
1852  * For models that also have stickpointer (DualPoints) its tapping
1853  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1854  * we don't fiddle with it.
1855  */
1856 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1857 {
1858         struct ps2dev *ps2dev = &psmouse->ps2dev;
1859         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1860         unsigned char tap_arg = enable ? 0x0A : 0x00;
1861         unsigned char param[4];
1862
1863         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1864             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1865             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1866             ps2_command(ps2dev, &tap_arg, cmd))
1867                 return -1;
1868
1869         if (alps_get_status(psmouse, param))
1870                 return -1;
1871
1872         return 0;
1873 }
1874
1875 /*
1876  * alps_poll() - poll the touchpad for current motion packet.
1877  * Used in resync.
1878  */
1879 static int alps_poll(struct psmouse *psmouse)
1880 {
1881         struct alps_data *priv = psmouse->private;
1882         unsigned char buf[sizeof(psmouse->packet)];
1883         bool poll_failed;
1884
1885         if (priv->flags & ALPS_PASS)
1886                 alps_passthrough_mode_v2(psmouse, true);
1887
1888         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1889                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1890
1891         if (priv->flags & ALPS_PASS)
1892                 alps_passthrough_mode_v2(psmouse, false);
1893
1894         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1895                 return -1;
1896
1897         if ((psmouse->badbyte & 0xc8) == 0x08) {
1898 /*
1899  * Poll the track stick ...
1900  */
1901                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1902                         return -1;
1903         }
1904
1905         memcpy(psmouse->packet, buf, sizeof(buf));
1906         return 0;
1907 }
1908
1909 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1910 {
1911         struct alps_data *priv = psmouse->private;
1912
1913         if ((priv->flags & ALPS_PASS) &&
1914             alps_passthrough_mode_v2(psmouse, true)) {
1915                 return -1;
1916         }
1917
1918         if (alps_tap_mode(psmouse, true)) {
1919                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1920                 return -1;
1921         }
1922
1923         if (alps_absolute_mode_v1_v2(psmouse)) {
1924                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1925                 return -1;
1926         }
1927
1928         if ((priv->flags & ALPS_PASS) &&
1929             alps_passthrough_mode_v2(psmouse, false)) {
1930                 return -1;
1931         }
1932
1933         /* ALPS needs stream mode, otherwise it won't report any data */
1934         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1935                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1936                 return -1;
1937         }
1938
1939         return 0;
1940 }
1941
1942 static int alps_hw_init_v6(struct psmouse *psmouse)
1943 {
1944         unsigned char param[2] = {0xC8, 0x14};
1945
1946         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1947         if (alps_passthrough_mode_v2(psmouse, true))
1948                 return -1;
1949
1950         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1951             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1952             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1953             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1954             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1955                 return -1;
1956
1957         if (alps_passthrough_mode_v2(psmouse, false))
1958                 return -1;
1959
1960         if (alps_absolute_mode_v6(psmouse)) {
1961                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1962                 return -1;
1963         }
1964
1965         return 0;
1966 }
1967
1968 /*
1969  * Enable or disable passthrough mode to the trackstick.
1970  */
1971 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1972                                     int reg_base, bool enable)
1973 {
1974         int reg_val, ret = -1;
1975
1976         if (alps_enter_command_mode(psmouse))
1977                 return -1;
1978
1979         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1980         if (reg_val == -1)
1981                 goto error;
1982
1983         if (enable)
1984                 reg_val |= 0x01;
1985         else
1986                 reg_val &= ~0x01;
1987
1988         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1989
1990 error:
1991         if (alps_exit_command_mode(psmouse))
1992                 ret = -1;
1993         return ret;
1994 }
1995
1996 /* Must be in command mode when calling this function */
1997 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1998 {
1999         int reg_val;
2000
2001         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2002         if (reg_val == -1)
2003                 return -1;
2004
2005         reg_val |= 0x06;
2006         if (__alps_command_mode_write_reg(psmouse, reg_val))
2007                 return -1;
2008
2009         return 0;
2010 }
2011
2012 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
2013 {
2014         int ret = -EIO, reg_val;
2015
2016         if (alps_enter_command_mode(psmouse))
2017                 goto error;
2018
2019         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2020         if (reg_val == -1)
2021                 goto error;
2022
2023         /* bit 7: trackstick is present */
2024         ret = reg_val & 0x80 ? 0 : -ENODEV;
2025
2026 error:
2027         alps_exit_command_mode(psmouse);
2028         return ret;
2029 }
2030
2031 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2032 {
2033         struct ps2dev *ps2dev = &psmouse->ps2dev;
2034         int ret = 0;
2035         unsigned char param[4];
2036
2037         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2038                 return -EIO;
2039
2040         /*
2041          * E7 report for the trackstick
2042          *
2043          * There have been reports of failures to seem to trace back
2044          * to the above trackstick check failing. When these occur
2045          * this E7 report fails, so when that happens we continue
2046          * with the assumption that there isn't a trackstick after
2047          * all.
2048          */
2049         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2050                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2051                 ret = -ENODEV;
2052         } else {
2053                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2054
2055                 /*
2056                  * Not sure what this does, but it is absolutely
2057                  * essential. Without it, the touchpad does not
2058                  * work at all and the trackstick just emits normal
2059                  * PS/2 packets.
2060                  */
2061                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2062                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2063                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2064                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2065                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2066                         psmouse_err(psmouse,
2067                                     "Error sending magic E6 sequence\n");
2068                         ret = -EIO;
2069                         goto error;
2070                 }
2071
2072                 /*
2073                  * This ensures the trackstick packets are in the format
2074                  * supported by this driver. If bit 1 isn't set the packet
2075                  * format is different.
2076                  */
2077                 if (alps_enter_command_mode(psmouse) ||
2078                     alps_command_mode_write_reg(psmouse,
2079                                                 reg_base + 0x08, 0x82) ||
2080                     alps_exit_command_mode(psmouse))
2081                         ret = -EIO;
2082         }
2083
2084 error:
2085         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2086                 ret = -EIO;
2087
2088         return ret;
2089 }
2090
2091 static int alps_hw_init_v3(struct psmouse *psmouse)
2092 {
2093         struct ps2dev *ps2dev = &psmouse->ps2dev;
2094         int reg_val;
2095         unsigned char param[4];
2096
2097         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
2098         if (reg_val == -EIO)
2099                 goto error;
2100
2101         if (reg_val == 0 &&
2102             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2103                 goto error;
2104
2105         if (alps_enter_command_mode(psmouse) ||
2106             alps_absolute_mode_v3(psmouse)) {
2107                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2108                 goto error;
2109         }
2110
2111         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2112         if (reg_val == -1)
2113                 goto error;
2114         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2115                 goto error;
2116
2117         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2118         if (reg_val == -1)
2119                 goto error;
2120         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2121                 goto error;
2122
2123         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2124                 goto error;
2125         if (__alps_command_mode_write_reg(psmouse, 0x04))
2126                 goto error;
2127
2128         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2129                 goto error;
2130         if (__alps_command_mode_write_reg(psmouse, 0x03))
2131                 goto error;
2132
2133         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2134                 goto error;
2135         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2136                 goto error;
2137
2138         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2139                 goto error;
2140         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2141                 goto error;
2142
2143         alps_exit_command_mode(psmouse);
2144
2145         /* Set rate and enable data reporting */
2146         param[0] = 0x64;
2147         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2148             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2149                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2150                 return -1;
2151         }
2152
2153         return 0;
2154
2155 error:
2156         /*
2157          * Leaving the touchpad in command mode will essentially render
2158          * it unusable until the machine reboots, so exit it here just
2159          * to be safe
2160          */
2161         alps_exit_command_mode(psmouse);
2162         return -1;
2163 }
2164
2165 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2166 {
2167         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2168         struct alps_data *priv = psmouse->private;
2169
2170         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2171         if (reg < 0)
2172                 return reg;
2173
2174         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2175         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2176
2177         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2178         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2179
2180         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2181         if (reg < 0)
2182                 return reg;
2183
2184         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2185         x_electrode = 17 + x_electrode;
2186
2187         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2188         y_electrode = 13 + y_electrode;
2189
2190         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2191         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2192
2193         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2194         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2195
2196         psmouse_dbg(psmouse,
2197                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2198                     x_pitch, y_pitch, x_electrode, y_electrode,
2199                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2200
2201         return 0;
2202 }
2203
2204 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2205 {
2206         struct alps_data *priv = psmouse->private;
2207         struct ps2dev *ps2dev = &psmouse->ps2dev;
2208         int reg_val, ret = -1;
2209
2210         if (priv->flags & ALPS_DUALPOINT) {
2211                 reg_val = alps_setup_trackstick_v3(psmouse,
2212                                                    ALPS_REG_BASE_RUSHMORE);
2213                 if (reg_val == -EIO)
2214                         goto error;
2215         }
2216
2217         if (alps_enter_command_mode(psmouse) ||
2218             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2219             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2220                 goto error;
2221
2222         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2223                 goto error;
2224
2225         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2226         if (reg_val == -1)
2227                 goto error;
2228         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2229                 goto error;
2230
2231         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2232                 goto error;
2233
2234         /* enter absolute mode */
2235         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2236         if (reg_val == -1)
2237                 goto error;
2238         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2239                 goto error;
2240
2241         alps_exit_command_mode(psmouse);
2242         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2243
2244 error:
2245         alps_exit_command_mode(psmouse);
2246         return ret;
2247 }
2248
2249 /* Must be in command mode when calling this function */
2250 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2251 {
2252         int reg_val;
2253
2254         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2255         if (reg_val == -1)
2256                 return -1;
2257
2258         reg_val |= 0x02;
2259         if (__alps_command_mode_write_reg(psmouse, reg_val))
2260                 return -1;
2261
2262         return 0;
2263 }
2264
2265 static int alps_hw_init_v4(struct psmouse *psmouse)
2266 {
2267         struct ps2dev *ps2dev = &psmouse->ps2dev;
2268         unsigned char param[4];
2269
2270         if (alps_enter_command_mode(psmouse))
2271                 goto error;
2272
2273         if (alps_absolute_mode_v4(psmouse)) {
2274                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2275                 goto error;
2276         }
2277
2278         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2279                 goto error;
2280
2281         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2282                 goto error;
2283
2284         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2285                 goto error;
2286
2287         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2288                 goto error;
2289
2290         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2291                 goto error;
2292
2293         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2294                 goto error;
2295
2296         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2297                 goto error;
2298
2299         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2300                 goto error;
2301
2302         alps_exit_command_mode(psmouse);
2303
2304         /*
2305          * This sequence changes the output from a 9-byte to an
2306          * 8-byte format. All the same data seems to be present,
2307          * just in a more compact format.
2308          */
2309         param[0] = 0xc8;
2310         param[1] = 0x64;
2311         param[2] = 0x50;
2312         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2313             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2314             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2315             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2316                 return -1;
2317
2318         /* Set rate and enable data reporting */
2319         param[0] = 0x64;
2320         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2321             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2322                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2323                 return -1;
2324         }
2325
2326         return 0;
2327
2328 error:
2329         /*
2330          * Leaving the touchpad in command mode will essentially render
2331          * it unusable until the machine reboots, so exit it here just
2332          * to be safe
2333          */
2334         alps_exit_command_mode(psmouse);
2335         return -1;
2336 }
2337
2338 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2339                                       unsigned char index, unsigned char otp[])
2340 {
2341         struct ps2dev *ps2dev = &psmouse->ps2dev;
2342
2343         switch (index) {
2344         case 0:
2345                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2346                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2347                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2348                         return -1;
2349
2350                 break;
2351
2352         case 1:
2353                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2354                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2355                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2356                         return -1;
2357
2358                 break;
2359         }
2360
2361         return 0;
2362 }
2363
2364 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2365                                           struct alps_data *priv)
2366 {
2367         int num_x_electrode;
2368         int num_y_electrode;
2369         int x_pitch, y_pitch, x_phys, y_phys;
2370
2371         num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2372         num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2373
2374         priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2375         priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2376
2377         x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2378         y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2379
2380         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2381         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2382
2383         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2384         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2385
2386         return 0;
2387 }
2388
2389 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2390                                        struct alps_data *priv)
2391 {
2392         unsigned char is_btnless;
2393
2394         is_btnless = (otp[1][1] >> 3) & 0x01;
2395
2396         if (is_btnless)
2397                 priv->flags |= ALPS_BUTTONPAD;
2398
2399         return 0;
2400 }
2401
2402 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2403                                     struct alps_data *priv)
2404 {
2405         unsigned char otp[2][4];
2406
2407         memset(otp, 0, sizeof(otp));
2408
2409         if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2410             alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2411                 return -1;
2412
2413         alps_update_device_area_ss4_v2(otp, priv);
2414
2415         alps_update_btn_info_ss4_v2(otp, priv);
2416
2417         return 0;
2418 }
2419
2420 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2421                                         struct alps_data *priv)
2422 {
2423         struct ps2dev *ps2dev = &psmouse->ps2dev;
2424         unsigned char param[4] = {0};
2425         int num_x_electrode, num_y_electrode;
2426
2427         if (alps_enter_command_mode(psmouse))
2428                 return -1;
2429
2430         param[0] = 0x0a;
2431         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2432             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2433             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2434             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2435             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2436                 return -1;
2437
2438         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2439                 return -1;
2440
2441         /*
2442          * Dolphin's sensor line number is not fixed. It can be calculated
2443          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2444          * Further more, we can get device's x_max and y_max by multiplying
2445          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2446          *
2447          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2448          *      real sensor line number X = 11 + 8 = 19, and
2449          *      real sensor line number Y = 8 + 1 = 9.
2450          *      So, x_max = (19 - 1) * 64 = 1152, and
2451          *          y_max = (9 - 1) * 64 = 512.
2452          */
2453         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2454         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2455         priv->x_bits = num_x_electrode;
2456         priv->y_bits = num_y_electrode;
2457         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2458         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2459
2460         if (alps_exit_command_mode(psmouse))
2461                 return -1;
2462
2463         return 0;
2464 }
2465
2466 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2467 {
2468         struct ps2dev *ps2dev = &psmouse->ps2dev;
2469         unsigned char param[2];
2470
2471         /* This is dolphin "v1" as empirically defined by florin9doi */
2472         param[0] = 0x64;
2473         param[1] = 0x28;
2474
2475         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2476             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2477             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2478                 return -1;
2479
2480         return 0;
2481 }
2482
2483 static int alps_hw_init_v7(struct psmouse *psmouse)
2484 {
2485         struct ps2dev *ps2dev = &psmouse->ps2dev;
2486         int reg_val, ret = -1;
2487
2488         if (alps_enter_command_mode(psmouse) ||
2489             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2490                 goto error;
2491
2492         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2493                 goto error;
2494
2495         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2496                 goto error;
2497
2498         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2499         if (reg_val == -1)
2500                 goto error;
2501         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2502                 goto error;
2503
2504         alps_exit_command_mode(psmouse);
2505         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2506
2507 error:
2508         alps_exit_command_mode(psmouse);
2509         return ret;
2510 }
2511
2512 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2513 {
2514         struct ps2dev *ps2dev = &psmouse->ps2dev;
2515         char param[2] = {0x64, 0x28};
2516         int ret = -1;
2517
2518         /* enter absolute mode */
2519         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2520             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2521             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2522             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2523                 goto error;
2524         }
2525
2526         /* T.B.D. Decread noise packet number, delete in the future */
2527         if (alps_exit_command_mode(psmouse) ||
2528             alps_enter_command_mode(psmouse) ||
2529             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2530                 goto error;
2531         }
2532         alps_exit_command_mode(psmouse);
2533
2534         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2535
2536 error:
2537         alps_exit_command_mode(psmouse);
2538         return ret;
2539 }
2540
2541 static int alps_set_protocol(struct psmouse *psmouse,
2542                              struct alps_data *priv,
2543                              const struct alps_protocol_info *protocol)
2544 {
2545         psmouse->private = priv;
2546
2547         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2548
2549         priv->proto_version = protocol->version;
2550         priv->byte0 = protocol->byte0;
2551         priv->mask0 = protocol->mask0;
2552         priv->flags = protocol->flags;
2553
2554         priv->x_max = 2000;
2555         priv->y_max = 1400;
2556         priv->x_bits = 15;
2557         priv->y_bits = 11;
2558
2559         switch (priv->proto_version) {
2560         case ALPS_PROTO_V1:
2561         case ALPS_PROTO_V2:
2562                 priv->hw_init = alps_hw_init_v1_v2;
2563                 priv->process_packet = alps_process_packet_v1_v2;
2564                 priv->set_abs_params = alps_set_abs_params_st;
2565                 priv->x_max = 1023;
2566                 priv->y_max = 767;
2567                 break;
2568
2569         case ALPS_PROTO_V3:
2570                 priv->hw_init = alps_hw_init_v3;
2571                 priv->process_packet = alps_process_packet_v3;
2572                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2573                 priv->decode_fields = alps_decode_pinnacle;
2574                 priv->nibble_commands = alps_v3_nibble_commands;
2575                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2576                 break;
2577
2578         case ALPS_PROTO_V3_RUSHMORE:
2579                 priv->hw_init = alps_hw_init_rushmore_v3;
2580                 priv->process_packet = alps_process_packet_v3;
2581                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2582                 priv->decode_fields = alps_decode_rushmore;
2583                 priv->nibble_commands = alps_v3_nibble_commands;
2584                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2585                 priv->x_bits = 16;
2586                 priv->y_bits = 12;
2587
2588                 if (alps_probe_trackstick_v3(psmouse,
2589                                              ALPS_REG_BASE_RUSHMORE) < 0)
2590                         priv->flags &= ~ALPS_DUALPOINT;
2591
2592                 break;
2593
2594         case ALPS_PROTO_V4:
2595                 priv->hw_init = alps_hw_init_v4;
2596                 priv->process_packet = alps_process_packet_v4;
2597                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2598                 priv->nibble_commands = alps_v4_nibble_commands;
2599                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2600                 break;
2601
2602         case ALPS_PROTO_V5:
2603                 priv->hw_init = alps_hw_init_dolphin_v1;
2604                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2605                 priv->decode_fields = alps_decode_dolphin;
2606                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2607                 priv->nibble_commands = alps_v3_nibble_commands;
2608                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2609                 priv->x_bits = 23;
2610                 priv->y_bits = 12;
2611
2612                 if (alps_dolphin_get_device_area(psmouse, priv))
2613                         return -EIO;
2614
2615                 break;
2616
2617         case ALPS_PROTO_V6:
2618                 priv->hw_init = alps_hw_init_v6;
2619                 priv->process_packet = alps_process_packet_v6;
2620                 priv->set_abs_params = alps_set_abs_params_st;
2621                 priv->nibble_commands = alps_v6_nibble_commands;
2622                 priv->x_max = 2047;
2623                 priv->y_max = 1535;
2624                 break;
2625
2626         case ALPS_PROTO_V7:
2627                 priv->hw_init = alps_hw_init_v7;
2628                 priv->process_packet = alps_process_packet_v7;
2629                 priv->decode_fields = alps_decode_packet_v7;
2630                 priv->set_abs_params = alps_set_abs_params_v7;
2631                 priv->nibble_commands = alps_v3_nibble_commands;
2632                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2633                 priv->x_max = 0xfff;
2634                 priv->y_max = 0x7ff;
2635
2636                 if (priv->fw_ver[1] != 0xba)
2637                         priv->flags |= ALPS_BUTTONPAD;
2638
2639                 break;
2640
2641         case ALPS_PROTO_V8:
2642                 priv->hw_init = alps_hw_init_ss4_v2;
2643                 priv->process_packet = alps_process_packet_ss4_v2;
2644                 priv->decode_fields = alps_decode_ss4_v2;
2645                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2646                 priv->nibble_commands = alps_v3_nibble_commands;
2647                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2648
2649                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2650                         return -EIO;
2651
2652                 break;
2653         }
2654
2655         return 0;
2656 }
2657
2658 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2659                                                          unsigned char *ec)
2660 {
2661         const struct alps_model_info *model;
2662         int i;
2663
2664         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2665                 model = &alps_model_data[i];
2666
2667                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2668                     (!model->command_mode_resp ||
2669                      model->command_mode_resp == ec[2])) {
2670
2671                         return &model->protocol_info;
2672                 }
2673         }
2674
2675         return NULL;
2676 }
2677
2678 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2679 {
2680         const struct alps_protocol_info *protocol;
2681         unsigned char e6[4], e7[4], ec[4];
2682         int error;
2683
2684         /*
2685          * First try "E6 report".
2686          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2687          * The bits 0-2 of the first byte will be 1s if some buttons are
2688          * pressed.
2689          */
2690         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2691                          PSMOUSE_CMD_SETSCALE11, e6))
2692                 return -EIO;
2693
2694         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2695                 return -EINVAL;
2696
2697         /*
2698          * Now get the "E7" and "EC" reports.  These will uniquely identify
2699          * most ALPS touchpads.
2700          */
2701         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2702                          PSMOUSE_CMD_SETSCALE21, e7) ||
2703             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2704                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2705             alps_exit_command_mode(psmouse))
2706                 return -EIO;
2707
2708         protocol = alps_match_table(e7, ec);
2709         if (!protocol) {
2710                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2711                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2712                         protocol = &alps_v5_protocol_data;
2713                 } else if (ec[0] == 0x88 &&
2714                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2715                         protocol = &alps_v7_protocol_data;
2716                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2717                         protocol = &alps_v3_rushmore_data;
2718                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2719                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2720                         protocol = &alps_v3_protocol_data;
2721                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2722                            e7[2] == 0x14 && ec[1] == 0x02) {
2723                         protocol = &alps_v8_protocol_data;
2724                 } else {
2725                         psmouse_dbg(psmouse,
2726                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2727                         return -EINVAL;
2728                 }
2729         }
2730
2731         if (priv) {
2732                 /* Save the Firmware version */
2733                 memcpy(priv->fw_ver, ec, 3);
2734                 error = alps_set_protocol(psmouse, priv, protocol);
2735                 if (error)
2736                         return error;
2737         }
2738
2739         return 0;
2740 }
2741
2742 static int alps_reconnect(struct psmouse *psmouse)
2743 {
2744         struct alps_data *priv = psmouse->private;
2745
2746         psmouse_reset(psmouse);
2747
2748         if (alps_identify(psmouse, priv) < 0)
2749                 return -1;
2750
2751         return priv->hw_init(psmouse);
2752 }
2753
2754 static void alps_disconnect(struct psmouse *psmouse)
2755 {
2756         struct alps_data *priv = psmouse->private;
2757
2758         psmouse_reset(psmouse);
2759         del_timer_sync(&priv->timer);
2760         if (priv->dev2)
2761                 input_unregister_device(priv->dev2);
2762         if (!IS_ERR_OR_NULL(priv->dev3))
2763                 input_unregister_device(priv->dev3);
2764         kfree(priv);
2765 }
2766
2767 static void alps_set_abs_params_st(struct alps_data *priv,
2768                                    struct input_dev *dev1)
2769 {
2770         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2771         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2772         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2773 }
2774
2775 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2776                                           struct input_dev *dev1)
2777 {
2778         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2779         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2780
2781         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2782         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2783
2784         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2785         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2786 }
2787
2788 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
2789                                         struct input_dev *dev1)
2790 {
2791         alps_set_abs_params_mt_common(priv, dev1);
2792         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2793
2794         input_mt_init_slots(dev1, MAX_TOUCHES,
2795                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2796                                 INPUT_MT_SEMI_MT);
2797 }
2798
2799 static void alps_set_abs_params_v7(struct alps_data *priv,
2800                                    struct input_dev *dev1)
2801 {
2802         alps_set_abs_params_mt_common(priv, dev1);
2803         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2804
2805         input_mt_init_slots(dev1, MAX_TOUCHES,
2806                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2807                                 INPUT_MT_TRACK);
2808
2809         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2810 }
2811
2812 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2813                                        struct input_dev *dev1)
2814 {
2815         alps_set_abs_params_mt_common(priv, dev1);
2816         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2817         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2818
2819         input_mt_init_slots(dev1, MAX_TOUCHES,
2820                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2821                                 INPUT_MT_TRACK);
2822 }
2823
2824 int alps_init(struct psmouse *psmouse)
2825 {
2826         struct alps_data *priv = psmouse->private;
2827         struct input_dev *dev1 = psmouse->dev;
2828         int error;
2829
2830         error = priv->hw_init(psmouse);
2831         if (error)
2832                 goto init_fail;
2833
2834         /*
2835          * Undo part of setup done for us by psmouse core since touchpad
2836          * is not a relative device.
2837          */
2838         __clear_bit(EV_REL, dev1->evbit);
2839         __clear_bit(REL_X, dev1->relbit);
2840         __clear_bit(REL_Y, dev1->relbit);
2841
2842         /*
2843          * Now set up our capabilities.
2844          */
2845         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2846         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2847         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2848         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2849                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2850
2851         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2852
2853         priv->set_abs_params(priv, dev1);
2854
2855         if (priv->flags & ALPS_WHEEL) {
2856                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2857                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2858         }
2859
2860         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2861                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2862                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2863         }
2864
2865         if (priv->flags & ALPS_FOUR_BUTTONS) {
2866                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2867                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2868                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2869                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2870         } else if (priv->flags & ALPS_BUTTONPAD) {
2871                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2872                 clear_bit(BTN_RIGHT, dev1->keybit);
2873         } else {
2874                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2875         }
2876
2877         if (priv->flags & ALPS_DUALPOINT) {
2878                 struct input_dev *dev2;
2879
2880                 dev2 = input_allocate_device();
2881                 if (!dev2) {
2882                         psmouse_err(psmouse,
2883                                     "failed to allocate trackstick device\n");
2884                         error = -ENOMEM;
2885                         goto init_fail;
2886                 }
2887
2888                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2889                          psmouse->ps2dev.serio->phys);
2890                 dev2->phys = priv->phys2;
2891
2892                 /*
2893                  * format of input device name is: "protocol vendor name"
2894                  * see function psmouse_switch_protocol() in psmouse-base.c
2895                  */
2896                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2897
2898                 dev2->id.bustype = BUS_I8042;
2899                 dev2->id.vendor  = 0x0002;
2900                 dev2->id.product = PSMOUSE_ALPS;
2901                 dev2->id.version = priv->proto_version;
2902                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2903
2904                 input_set_capability(dev2, EV_REL, REL_X);
2905                 input_set_capability(dev2, EV_REL, REL_Y);
2906                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2907                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2908                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2909
2910                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2911                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2912
2913                 error = input_register_device(dev2);
2914                 if (error) {
2915                         psmouse_err(psmouse,
2916                                     "failed to register trackstick device: %d\n",
2917                                     error);
2918                         input_free_device(dev2);
2919                         goto init_fail;
2920                 }
2921
2922                 priv->dev2 = dev2;
2923         }
2924
2925         priv->psmouse = psmouse;
2926
2927         INIT_DELAYED_WORK(&priv->dev3_register_work,
2928                           alps_register_bare_ps2_mouse);
2929
2930         psmouse->protocol_handler = alps_process_byte;
2931         psmouse->poll = alps_poll;
2932         psmouse->disconnect = alps_disconnect;
2933         psmouse->reconnect = alps_reconnect;
2934         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2935
2936         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2937         psmouse->resync_time = 0;
2938
2939         /* Allow 2 invalid packets without resetting device */
2940         psmouse->resetafter = psmouse->pktsize * 2;
2941
2942         return 0;
2943
2944 init_fail:
2945         psmouse_reset(psmouse);
2946         /*
2947          * Even though we did not allocate psmouse->private we do free
2948          * it here.
2949          */
2950         kfree(psmouse->private);
2951         psmouse->private = NULL;
2952         return error;
2953 }
2954
2955 int alps_detect(struct psmouse *psmouse, bool set_properties)
2956 {
2957         struct alps_data *priv;
2958         int error;
2959
2960         error = alps_identify(psmouse, NULL);
2961         if (error)
2962                 return error;
2963
2964         /*
2965          * Reset the device to make sure it is fully operational:
2966          * on some laptops, like certain Dell Latitudes, we may
2967          * fail to properly detect presence of trackstick if device
2968          * has not been reset.
2969          */
2970         psmouse_reset(psmouse);
2971
2972         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2973         if (!priv)
2974                 return -ENOMEM;
2975
2976         error = alps_identify(psmouse, priv);
2977         if (error) {
2978                 kfree(priv);
2979                 return error;
2980         }
2981
2982         if (set_properties) {
2983                 psmouse->vendor = "ALPS";
2984                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
2985                                 "DualPoint TouchPad" : "GlidePoint";
2986                 psmouse->model = priv->proto_version;
2987         } else {
2988                 /*
2989                  * Destroy alps_data structure we allocated earlier since
2990                  * this was just a "trial run". Otherwise we'll keep it
2991                  * to be used by alps_init() which has to be called if
2992                  * we succeed and set_properties is true.
2993                  */
2994                 kfree(priv);
2995                 psmouse->private = NULL;
2996         }
2997
2998         return 0;
2999 }
3000