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