drivers/input/mouse/alps.c

   1 /*
   2  * ALPS touchpad PS/2 mouse driver
   3  *
   4  * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
   5  * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
   6  * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
   7  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
   8  * Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net>
   9  *
  10  * ALPS detection, tap switching and status querying info is taken from
  11  * tpconfig utility (by C. Scott Ananian and Bruce Kall).
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU General Public License version 2 as published by
  15  * the Free Software Foundation.
  16  */
  17
  18 #include <linux/slab.h>
  19 #include <linux/input.h>
  20 #include <linux/input/mt.h>
  21 #include <linux/serio.h>
  22 #include <linux/libps2.h>
  23
  24 #include "psmouse.h"
  25 #include "alps.h"
  26
  27 /*
  28  * Definitions for ALPS version 3 and 4 command mode protocol
  29  */
  30 #define ALPS_CMD_NIBBLE_10      0x01f2
  31
  32 #define ALPS_REG_BASE_RUSHMORE  0xc2c0
  33 #define ALPS_REG_BASE_PINNACLE  0x0000
  34
  35 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
  36         { PSMOUSE_CMD_SETPOLL,          0x00 }, /* 0 */
  37         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
  38         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
  39         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
  40         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
  41         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
  42         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
  43         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
  44         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
  45         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
  46         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
  47         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
  48         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
  49         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
  50         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
  51         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  52 };
  53
  54 static const struct alps_nibble_commands alps_v4_nibble_commands[] = {
  55         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
  56         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
  57         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
  58         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
  59         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
  60         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
  61         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
  62         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
  63         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
  64         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
  65         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
  66         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
  67         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
  68         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
  69         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
  70         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  71 };
  72
  73 static const struct alps_nibble_commands alps_v6_nibble_commands[] = {
  74         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
  75         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 1 */
  76         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 2 */
  77         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 3 */
  78         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 4 */
  79         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 5 */
  80         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 6 */
  81         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 7 */
  82         { PSMOUSE_CMD_GETID,            0x00 }, /* 8 */
  83         { PSMOUSE_CMD_GETINFO,          0x00 }, /* 9 */
  84         { PSMOUSE_CMD_SETRES,           0x00 }, /* a */
  85         { PSMOUSE_CMD_SETRES,           0x01 }, /* b */
  86         { PSMOUSE_CMD_SETRES,           0x02 }, /* c */
  87         { PSMOUSE_CMD_SETRES,           0x03 }, /* d */
  88         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* e */
  89         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  90 };
  91
  92
  93 #define ALPS_DUALPOINT          0x02    /* touchpad has trackstick */
  94 #define ALPS_PASS               0x04    /* device has a pass-through port */
  95
  96 #define ALPS_WHEEL              0x08    /* hardware wheel present */
  97 #define ALPS_FW_BK_1            0x10    /* front & back buttons present */
  98 #define ALPS_FW_BK_2            0x20    /* front & back buttons present */
  99 #define ALPS_FOUR_BUTTONS       0x40    /* 4 direction button present */
 100 #define ALPS_PS2_INTERLEAVED    0x80    /* 3-byte PS/2 packet interleaved with
 101                                            6-byte ALPS packet */
 102 #define ALPS_BUTTONPAD          0x200   /* device is a clickpad */
 103
 104 static const struct alps_model_info alps_model_data[] = {
 105         { { 0x32, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Toshiba Salellite Pro M10 */
 106         { { 0x33, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } },                               /* UMAX-530T */
 107         { { 0x53, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 108         { { 0x53, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 109         { { 0x60, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },                               /* HP ze1115 */
 110         { { 0x63, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 111         { { 0x63, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 112         { { 0x63, 0x02, 0x28 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Fujitsu Siemens S6010 */
 113         { { 0x63, 0x02, 0x3c }, 0x00, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } },              /* Toshiba Satellite S2400-103 */
 114         { { 0x63, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } },            /* NEC Versa L320 */
 115         { { 0x63, 0x02, 0x64 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 116         { { 0x63, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D800 */
 117         { { 0x73, 0x00, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } },          /* ThinkPad R61 8918-5QG */
 118         { { 0x73, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 119         { { 0x73, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Ahtec Laptop */
 120
 121         /*
 122          * XXX This entry is suspicious. First byte has zero lower nibble,
 123          * which is what a normal mouse would report. Also, the value 0x0e
 124          * isn't valid per PS/2 spec.
 125          */
 126         { { 0x20, 0x02, 0x0e }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 127
 128         { { 0x22, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 129         { { 0x22, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D600 */
 130         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
 131         { { 0x62, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf,
 132                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },
 133         { { 0x73, 0x00, 0x14 }, 0x00, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } },          /* Dell XT2 */
 134         { { 0x73, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } },       /* Dell Vostro 1400 */
 135         { { 0x52, 0x01, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff,
 136                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },                          /* Toshiba Tecra A11-11L */
 137         { { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } },
 138 };
 139
 140 static const struct alps_protocol_info alps_v3_protocol_data = {
 141         ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT
 142 };
 143
 144 static const struct alps_protocol_info alps_v3_rushmore_data = {
 145         ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT
 146 };
 147
 148 static const struct alps_protocol_info alps_v5_protocol_data = {
 149         ALPS_PROTO_V5, 0xc8, 0xd8, 0
 150 };
 151
 152 static const struct alps_protocol_info alps_v7_protocol_data = {
 153         ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
 154 };
 155
 156 static void alps_set_abs_params_st(struct alps_data *priv,
 157                                    struct input_dev *dev1);
 158 static void alps_set_abs_params_mt(struct alps_data *priv,
 159                                    struct input_dev *dev1);
 160
 161 /* Packet formats are described in Documentation/input/alps.txt */
 162
 163 static bool alps_is_valid_first_byte(struct alps_data *priv,
 164                                      unsigned char data)
 165 {
 166         return (data & priv->mask0) == priv->byte0;
 167 }
 168
 169 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
 170                                 int left, int right, int middle)
 171 {
 172         struct input_dev *dev;
 173
 174         /*
 175          * If shared button has already been reported on the
 176          * other device (dev2) then this event should be also
 177          * sent through that device.
 178          */
 179         dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
 180         input_report_key(dev, BTN_LEFT, left);
 181
 182         dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
 183         input_report_key(dev, BTN_RIGHT, right);
 184
 185         dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
 186         input_report_key(dev, BTN_MIDDLE, middle);
 187
 188         /*
 189          * Sync the _other_ device now, we'll do the first
 190          * device later once we report the rest of the events.
 191          */
 192         if (dev2)
 193                 input_sync(dev2);
 194 }
 195
 196 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
 197 {
 198         struct alps_data *priv = psmouse->private;
 199         unsigned char *packet = psmouse->packet;
 200         struct input_dev *dev = psmouse->dev;
 201         struct input_dev *dev2 = priv->dev2;
 202         int x, y, z, ges, fin, left, right, middle;
 203         int back = 0, forward = 0;
 204
 205         if (priv->proto_version == ALPS_PROTO_V1) {
 206                 left = packet[2] & 0x10;
 207                 right = packet[2] & 0x08;
 208                 middle = 0;
 209                 x = packet[1] | ((packet[0] & 0x07) << 7);
 210                 y = packet[4] | ((packet[3] & 0x07) << 7);
 211                 z = packet[5];
 212         } else {
 213                 left = packet[3] & 1;
 214                 right = packet[3] & 2;
 215                 middle = packet[3] & 4;
 216                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 217                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 218                 z = packet[5];
 219         }
 220
 221         if (priv->flags & ALPS_FW_BK_1) {
 222                 back = packet[0] & 0x10;
 223                 forward = packet[2] & 4;
 224         }
 225
 226         if (priv->flags & ALPS_FW_BK_2) {
 227                 back = packet[3] & 4;
 228                 forward = packet[2] & 4;
 229                 if ((middle = forward && back))
 230                         forward = back = 0;
 231         }
 232
 233         ges = packet[2] & 1;
 234         fin = packet[2] & 2;
 235
 236         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
 237                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 238                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 239
 240                 alps_report_buttons(dev2, dev, left, right, middle);
 241
 242                 input_sync(dev2);
 243                 return;
 244         }
 245
 246         alps_report_buttons(dev, dev2, left, right, middle);
 247
 248         /* Convert hardware tap to a reasonable Z value */
 249         if (ges && !fin)
 250                 z = 40;
 251
 252         /*
 253          * A "tap and drag" operation is reported by the hardware as a transition
 254          * from (!fin && ges) to (fin && ges). This should be translated to the
 255          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 256          */
 257         if (ges && fin && !priv->prev_fin) {
 258                 input_report_abs(dev, ABS_X, x);
 259                 input_report_abs(dev, ABS_Y, y);
 260                 input_report_abs(dev, ABS_PRESSURE, 0);
 261                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 262                 input_sync(dev);
 263         }
 264         priv->prev_fin = fin;
 265
 266         if (z > 30)
 267                 input_report_key(dev, BTN_TOUCH, 1);
 268         if (z < 25)
 269                 input_report_key(dev, BTN_TOUCH, 0);
 270
 271         if (z > 0) {
 272                 input_report_abs(dev, ABS_X, x);
 273                 input_report_abs(dev, ABS_Y, y);
 274         }
 275
 276         input_report_abs(dev, ABS_PRESSURE, z);
 277         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 278
 279         if (priv->flags & ALPS_WHEEL)
 280                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 281
 282         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 283                 input_report_key(dev, BTN_FORWARD, forward);
 284                 input_report_key(dev, BTN_BACK, back);
 285         }
 286
 287         if (priv->flags & ALPS_FOUR_BUTTONS) {
 288                 input_report_key(dev, BTN_0, packet[2] & 4);
 289                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 290                 input_report_key(dev, BTN_2, packet[3] & 4);
 291                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 292         }
 293
 294         input_sync(dev);
 295 }
 296
 297 /*
 298  * Process bitmap data for V5 protocols. Return value is null.
 299  *
 300  * The bitmaps don't have enough data to track fingers, so this function
 301  * only generates points representing a bounding box of at most two contacts.
 302  * These two points are returned in fields->mt.
 303  */
 304 static void alps_process_bitmap_dolphin(struct alps_data *priv,
 305                                         struct alps_fields *fields)
 306 {
 307         int box_middle_x, box_middle_y;
 308         unsigned int x_map, y_map;
 309         unsigned char start_bit, end_bit;
 310         unsigned char x_msb, x_lsb, y_msb, y_lsb;
 311
 312         x_map = fields->x_map;
 313         y_map = fields->y_map;
 314
 315         if (!x_map || !y_map)
 316                 return;
 317
 318         /* Get Most-significant and Least-significant bit */
 319         x_msb = fls(x_map);
 320         x_lsb = ffs(x_map);
 321         y_msb = fls(y_map);
 322         y_lsb = ffs(y_map);
 323
 324         /* Most-significant bit should never exceed max sensor line number */
 325         if (x_msb > priv->x_bits || y_msb > priv->y_bits)
 326                 return;
 327
 328         if (fields->fingers > 1) {
 329                 start_bit = priv->x_bits - x_msb;
 330                 end_bit = priv->x_bits - x_lsb;
 331                 box_middle_x = (priv->x_max * (start_bit + end_bit)) /
 332                                 (2 * (priv->x_bits - 1));
 333
 334                 start_bit = y_lsb - 1;
 335                 end_bit = y_msb - 1;
 336                 box_middle_y = (priv->y_max * (start_bit + end_bit)) /
 337                                 (2 * (priv->y_bits - 1));
 338                 fields->mt[0] = fields->st;
 339                 fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
 340                 fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
 341         }
 342 }
 343
 344 static void alps_get_bitmap_points(unsigned int map,
 345                                    struct alps_bitmap_point *low,
 346                                    struct alps_bitmap_point *high,
 347                                    int *fingers)
 348 {
 349         struct alps_bitmap_point *point;
 350         int i, bit, prev_bit = 0;
 351
 352         point = low;
 353         for (i = 0; map != 0; i++, map >>= 1) {
 354                 bit = map & 1;
 355                 if (bit) {
 356                         if (!prev_bit) {
 357                                 point->start_bit = i;
 358                                 point->num_bits = 0;
 359                                 (*fingers)++;
 360                         }
 361                         point->num_bits++;
 362                 } else {
 363                         if (prev_bit)
 364                                 point = high;
 365                 }
 366                 prev_bit = bit;
 367         }
 368 }
 369
 370 /*
 371  * Process bitmap data from v3 and v4 protocols. Returns the number of
 372  * fingers detected. A return value of 0 means at least one of the
 373  * bitmaps was empty.
 374  *
 375  * The bitmaps don't have enough data to track fingers, so this function
 376  * only generates points representing a bounding box of all contacts.
 377  * These points are returned in fields->mt when the return value
 378  * is greater than 0.
 379  */
 380 static int alps_process_bitmap(struct alps_data *priv,
 381                                struct alps_fields *fields)
 382 {
 383         int i, fingers_x = 0, fingers_y = 0, fingers;
 384         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 385         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 386
 387         if (!fields->x_map || !fields->y_map)
 388                 return 0;
 389
 390         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
 391         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
 392
 393         /*
 394          * Fingers can overlap, so we use the maximum count of fingers
 395          * on either axis as the finger count.
 396          */
 397         fingers = max(fingers_x, fingers_y);
 398
 399         /*
 400          * If an axis reports only a single contact, we have overlapping or
 401          * adjacent fingers. Divide the single contact between the two points.
 402          */
 403         if (fingers_x == 1) {
 404                 i = (x_low.num_bits - 1) / 2;
 405                 x_low.num_bits = x_low.num_bits - i;
 406                 x_high.start_bit = x_low.start_bit + i;
 407                 x_high.num_bits = max(i, 1);
 408         }
 409         if (fingers_y == 1) {
 410                 i = (y_low.num_bits - 1) / 2;
 411                 y_low.num_bits = y_low.num_bits - i;
 412                 y_high.start_bit = y_low.start_bit + i;
 413                 y_high.num_bits = max(i, 1);
 414         }
 415
 416         fields->mt[0].x =
 417                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 418                 (2 * (priv->x_bits - 1));
 419         fields->mt[0].y =
 420                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 421                 (2 * (priv->y_bits - 1));
 422
 423         fields->mt[1].x =
 424                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 425                 (2 * (priv->x_bits - 1));
 426         fields->mt[1].y =
 427                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 428                 (2 * (priv->y_bits - 1));
 429
 430         /* y-bitmap order is reversed, except on rushmore */
 431         if (priv->proto_version != ALPS_PROTO_V3_RUSHMORE) {
 432                 fields->mt[0].y = priv->y_max - fields->mt[0].y;
 433                 fields->mt[1].y = priv->y_max - fields->mt[1].y;
 434         }
 435
 436         return fingers;
 437 }
 438
 439 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
 440 {
 441         input_mt_slot(dev, slot);
 442         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 443         input_report_abs(dev, ABS_MT_POSITION_X, x);
 444         input_report_abs(dev, ABS_MT_POSITION_Y, y);
 445 }
 446
 447 static void alps_report_mt_data(struct psmouse *psmouse, int n)
 448 {
 449         struct alps_data *priv = psmouse->private;
 450         struct input_dev *dev = psmouse->dev;
 451         struct alps_fields *f = &priv->f;
 452         int i, slot[MAX_TOUCHES];
 453
 454         input_mt_assign_slots(dev, slot, f->mt, n, 0);
 455         for (i = 0; i < n; i++)
 456                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
 457
 458         input_mt_sync_frame(dev);
 459 }
 460
 461 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
 462 {
 463         struct alps_data *priv = psmouse->private;
 464         struct input_dev *dev = psmouse->dev;
 465         struct alps_fields *f = &priv->f;
 466
 467         /* Use st data when we don't have mt data */
 468         if (fingers < 2) {
 469                 f->mt[0].x = f->st.x;
 470                 f->mt[0].y = f->st.y;
 471                 fingers = f->pressure > 0 ? 1 : 0;
 472         }
 473
 474         alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
 475
 476         input_mt_report_finger_count(dev, fingers);
 477
 478         input_report_key(dev, BTN_LEFT, f->left);
 479         input_report_key(dev, BTN_RIGHT, f->right);
 480         input_report_key(dev, BTN_MIDDLE, f->middle);
 481
 482         input_report_abs(dev, ABS_PRESSURE, f->pressure);
 483
 484         input_sync(dev);
 485 }
 486
 487 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 488 {
 489         struct alps_data *priv = psmouse->private;
 490         unsigned char *packet = psmouse->packet;
 491         struct input_dev *dev = priv->dev2;
 492         int x, y, z, left, right, middle;
 493
 494         /* It should be a DualPoint when received trackstick packet */
 495         if (!(priv->flags & ALPS_DUALPOINT)) {
 496                 psmouse_warn(psmouse,
 497                              "Rejected trackstick packet from non DualPoint device");
 498                 return;
 499         }
 500
 501         /* Sanity check packet */
 502         if (!(packet[0] & 0x40)) {
 503                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 504                 return;
 505         }
 506
 507         /*
 508          * There's a special packet that seems to indicate the end
 509          * of a stream of trackstick data. Filter these out.
 510          */
 511         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 512                 return;
 513
 514         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 515         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 516         z = (packet[4] & 0x7c) >> 2;
 517
 518         /*
 519          * The x and y values tend to be quite large, and when used
 520          * alone the trackstick is difficult to use. Scale them down
 521          * to compensate.
 522          */
 523         x /= 8;
 524         y /= 8;
 525
 526         input_report_rel(dev, REL_X, x);
 527         input_report_rel(dev, REL_Y, -y);
 528
 529         /*
 530          * Most ALPS models report the trackstick buttons in the touchpad
 531          * packets, but a few report them here. No reliable way has been
 532          * found to differentiate between the models upfront, so we enable
 533          * the quirk in response to seeing a button press in the trackstick
 534          * packet.
 535          */
 536         left = packet[3] & 0x01;
 537         right = packet[3] & 0x02;
 538         middle = packet[3] & 0x04;
 539
 540         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 541             (left || right || middle))
 542                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 543
 544         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 545                 input_report_key(dev, BTN_LEFT, left);
 546                 input_report_key(dev, BTN_RIGHT, right);
 547                 input_report_key(dev, BTN_MIDDLE, middle);
 548         }
 549
 550         input_sync(dev);
 551         return;
 552 }
 553
 554 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 555 {
 556         f->left = !!(p[3] & 0x01);
 557         f->right = !!(p[3] & 0x02);
 558         f->middle = !!(p[3] & 0x04);
 559
 560         f->ts_left = !!(p[3] & 0x10);
 561         f->ts_right = !!(p[3] & 0x20);
 562         f->ts_middle = !!(p[3] & 0x40);
 563 }
 564
 565 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 566                                  struct psmouse *psmouse)
 567 {
 568         f->first_mp = !!(p[4] & 0x40);
 569         f->is_mp = !!(p[0] & 0x40);
 570
 571         f->fingers = (p[5] & 0x3) + 1;
 572         f->x_map = ((p[4] & 0x7e) << 8) |
 573                    ((p[1] & 0x7f) << 2) |
 574                    ((p[0] & 0x30) >> 4);
 575         f->y_map = ((p[3] & 0x70) << 4) |
 576                    ((p[2] & 0x7f) << 1) |
 577                    (p[4] & 0x01);
 578
 579         f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 580                ((p[0] & 0x30) >> 4);
 581         f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 582         f->pressure = p[5] & 0x7f;
 583
 584         alps_decode_buttons_v3(f, p);
 585
 586         return 0;
 587 }
 588
 589 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 590                                  struct psmouse *psmouse)
 591 {
 592         alps_decode_pinnacle(f, p, psmouse);
 593
 594         /* Rushmore's packet decode has a bit difference with Pinnacle's */
 595         f->is_mp = !!(p[5] & 0x40);
 596         f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
 597         f->x_map |= (p[5] & 0x10) << 11;
 598         f->y_map |= (p[5] & 0x20) << 6;
 599
 600         return 0;
 601 }
 602
 603 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 604                                 struct psmouse *psmouse)
 605 {
 606         u64 palm_data = 0;
 607         struct alps_data *priv = psmouse->private;
 608
 609         f->first_mp = !!(p[0] & 0x02);
 610         f->is_mp = !!(p[0] & 0x20);
 611
 612         if (!f->is_mp) {
 613                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 614                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 615                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
 616                 alps_decode_buttons_v3(f, p);
 617         } else {
 618                 f->fingers = ((p[0] & 0x6) >> 1 |
 619                      (p[0] & 0x10) >> 2);
 620
 621                 palm_data = (p[1] & 0x7f) |
 622                             ((p[2] & 0x7f) << 7) |
 623                             ((p[4] & 0x7f) << 14) |
 624                             ((p[5] & 0x7f) << 21) |
 625                             ((p[3] & 0x07) << 28) |
 626                             (((u64)p[3] & 0x70) << 27) |
 627                             (((u64)p[0] & 0x01) << 34);
 628
 629                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
 630                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
 631
 632                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
 633                 f->x_map = (palm_data >> priv->y_bits) &
 634                            (BIT(priv->x_bits) - 1);
 635         }
 636
 637         return 0;
 638 }
 639
 640 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 641 {
 642         struct alps_data *priv = psmouse->private;
 643         unsigned char *packet = psmouse->packet;
 644         struct input_dev *dev2 = priv->dev2;
 645         struct alps_fields *f = &priv->f;
 646         int fingers = 0;
 647
 648         memset(f, 0, sizeof(*f));
 649
 650         priv->decode_fields(f, packet, psmouse);
 651
 652         /*
 653          * There's no single feature of touchpad position and bitmap packets
 654          * that can be used to distinguish between them. We rely on the fact
 655          * that a bitmap packet should always follow a position packet with
 656          * bit 6 of packet[4] set.
 657          */
 658         if (priv->multi_packet) {
 659                 /*
 660                  * Sometimes a position packet will indicate a multi-packet
 661                  * sequence, but then what follows is another position
 662                  * packet. Check for this, and when it happens process the
 663                  * position packet as usual.
 664                  */
 665                 if (f->is_mp) {
 666                         fingers = f->fingers;
 667                         if (priv->proto_version == ALPS_PROTO_V3 ||
 668                             priv->proto_version == ALPS_PROTO_V3_RUSHMORE) {
 669                                 if (alps_process_bitmap(priv, f) == 0)
 670                                         fingers = 0; /* Use st data */
 671
 672                                 /* Now process position packet */
 673                                 priv->decode_fields(f, priv->multi_data,
 674                                                     psmouse);
 675                         } else {
 676                                 /*
 677                                  * Because Dolphin uses position packet's
 678                                  * coordinate data as Pt1 and uses it to
 679                                  * calculate Pt2, so we need to do position
 680                                  * packet decode first.
 681                                  */
 682                                 priv->decode_fields(f, priv->multi_data,
 683                                                     psmouse);
 684
 685                                 /*
 686                                  * Since Dolphin's finger number is reliable,
 687                                  * there is no need to compare with bmap_fn.
 688                                  */
 689                                 alps_process_bitmap_dolphin(priv, f);
 690                         }
 691                 } else {
 692                         priv->multi_packet = 0;
 693                 }
 694         }
 695
 696         /*
 697          * Bit 6 of byte 0 is not usually set in position packets. The only
 698          * times it seems to be set is in situations where the data is
 699          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 700          * this combined with the fact that this bit is useful for filtering
 701          * out misidentified bitmap packets, we reject anything with this
 702          * bit set.
 703          */
 704         if (f->is_mp)
 705                 return;
 706
 707         if (!priv->multi_packet && f->first_mp) {
 708                 priv->multi_packet = 1;
 709                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 710                 return;
 711         }
 712
 713         priv->multi_packet = 0;
 714
 715         /*
 716          * Sometimes the hardware sends a single packet with z = 0
 717          * in the middle of a stream. Real releases generate packets
 718          * with x, y, and z all zero, so these seem to be flukes.
 719          * Ignore them.
 720          */
 721         if (f->st.x && f->st.y && !f->pressure)
 722                 return;
 723
 724         alps_report_semi_mt_data(psmouse, fingers);
 725
 726         if ((priv->flags & ALPS_DUALPOINT) &&
 727             !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 728                 input_report_key(dev2, BTN_LEFT, f->ts_left);
 729                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
 730                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
 731                 input_sync(dev2);
 732         }
 733 }
 734
 735 static void alps_process_packet_v3(struct psmouse *psmouse)
 736 {
 737         unsigned char *packet = psmouse->packet;
 738
 739         /*
 740          * v3 protocol packets come in three types, two representing
 741          * touchpad data and one representing trackstick data.
 742          * Trackstick packets seem to be distinguished by always
 743          * having 0x3f in the last byte. This value has never been
 744          * observed in the last byte of either of the other types
 745          * of packets.
 746          */
 747         if (packet[5] == 0x3f) {
 748                 alps_process_trackstick_packet_v3(psmouse);
 749                 return;
 750         }
 751
 752         alps_process_touchpad_packet_v3_v5(psmouse);
 753 }
 754
 755 static void alps_process_packet_v6(struct psmouse *psmouse)
 756 {
 757         struct alps_data *priv = psmouse->private;
 758         unsigned char *packet = psmouse->packet;
 759         struct input_dev *dev = psmouse->dev;
 760         struct input_dev *dev2 = priv->dev2;
 761         int x, y, z, left, right, middle;
 762
 763         /*
 764          * We can use Byte5 to distinguish if the packet is from Touchpad
 765          * or Trackpoint.
 766          * Touchpad:    0 - 0x7E
 767          * Trackpoint:  0x7F
 768          */
 769         if (packet[5] == 0x7F) {
 770                 /* It should be a DualPoint when received Trackpoint packet */
 771                 if (!(priv->flags & ALPS_DUALPOINT)) {
 772                         psmouse_warn(psmouse,
 773                                      "Rejected trackstick packet from non DualPoint device");
 774                         return;
 775                 }
 776
 777                 /* Trackpoint packet */
 778                 x = packet[1] | ((packet[3] & 0x20) << 2);
 779                 y = packet[2] | ((packet[3] & 0x40) << 1);
 780                 z = packet[4];
 781                 left = packet[3] & 0x01;
 782                 right = packet[3] & 0x02;
 783                 middle = packet[3] & 0x04;
 784
 785                 /* To prevent the cursor jump when finger lifted */
 786                 if (x == 0x7F && y == 0x7F && z == 0x7F)
 787                         x = y = z = 0;
 788
 789                 /* Divide 4 since trackpoint's speed is too fast */
 790                 input_report_rel(dev2, REL_X, (char)x / 4);
 791                 input_report_rel(dev2, REL_Y, -((char)y / 4));
 792
 793                 input_report_key(dev2, BTN_LEFT, left);
 794                 input_report_key(dev2, BTN_RIGHT, right);
 795                 input_report_key(dev2, BTN_MIDDLE, middle);
 796
 797                 input_sync(dev2);
 798                 return;
 799         }
 800
 801         /* Touchpad packet */
 802         x = packet[1] | ((packet[3] & 0x78) << 4);
 803         y = packet[2] | ((packet[4] & 0x78) << 4);
 804         z = packet[5];
 805         left = packet[3] & 0x01;
 806         right = packet[3] & 0x02;
 807
 808         if (z > 30)
 809                 input_report_key(dev, BTN_TOUCH, 1);
 810         if (z < 25)
 811                 input_report_key(dev, BTN_TOUCH, 0);
 812
 813         if (z > 0) {
 814                 input_report_abs(dev, ABS_X, x);
 815                 input_report_abs(dev, ABS_Y, y);
 816         }
 817
 818         input_report_abs(dev, ABS_PRESSURE, z);
 819         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 820
 821         /* v6 touchpad does not have middle button */
 822         input_report_key(dev, BTN_LEFT, left);
 823         input_report_key(dev, BTN_RIGHT, right);
 824
 825         input_sync(dev);
 826 }
 827
 828 static void alps_process_packet_v4(struct psmouse *psmouse)
 829 {
 830         struct alps_data *priv = psmouse->private;
 831         unsigned char *packet = psmouse->packet;
 832         struct alps_fields *f = &priv->f;
 833         int offset;
 834
 835         /*
 836          * v4 has a 6-byte encoding for bitmap data, but this data is
 837          * broken up between 3 normal packets. Use priv->multi_packet to
 838          * track our position in the bitmap packet.
 839          */
 840         if (packet[6] & 0x40) {
 841                 /* sync, reset position */
 842                 priv->multi_packet = 0;
 843         }
 844
 845         if (WARN_ON_ONCE(priv->multi_packet > 2))
 846                 return;
 847
 848         offset = 2 * priv->multi_packet;
 849         priv->multi_data[offset] = packet[6];
 850         priv->multi_data[offset + 1] = packet[7];
 851
 852         if (++priv->multi_packet > 2) {
 853                 priv->multi_packet = 0;
 854
 855                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
 856                            ((priv->multi_data[3] & 0x60) << 3) |
 857                            ((priv->multi_data[0] & 0x3f) << 2) |
 858                            ((priv->multi_data[1] & 0x60) >> 5);
 859                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
 860                            ((priv->multi_data[3] & 0x1f) << 5) |
 861                             (priv->multi_data[1] & 0x1f);
 862
 863                 f->fingers = alps_process_bitmap(priv, f);
 864         }
 865
 866         f->left = !!(packet[4] & 0x01);
 867         f->right = !!(packet[4] & 0x02);
 868
 869         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 870                   ((packet[0] & 0x30) >> 4);
 871         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 872         f->pressure = packet[5] & 0x7f;
 873
 874         alps_report_semi_mt_data(psmouse, f->fingers);
 875 }
 876
 877 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
 878 {
 879         switch (psmouse->pktcnt) {
 880         case 3:
 881                 return (psmouse->packet[2] & 0x40) == 0x40;
 882         case 4:
 883                 return (psmouse->packet[3] & 0x48) == 0x48;
 884         case 6:
 885                 return (psmouse->packet[5] & 0x40) == 0x00;
 886         }
 887         return true;
 888 }
 889
 890 static unsigned char alps_get_packet_id_v7(char *byte)
 891 {
 892         unsigned char packet_id;
 893
 894         if (byte[4] & 0x40)
 895                 packet_id = V7_PACKET_ID_TWO;
 896         else if (byte[4] & 0x01)
 897                 packet_id = V7_PACKET_ID_MULTI;
 898         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
 899                 packet_id = V7_PACKET_ID_NEW;
 900         else if (byte[1] == 0x00 && byte[4] == 0x00)
 901                 packet_id = V7_PACKET_ID_IDLE;
 902         else
 903                 packet_id = V7_PACKET_ID_UNKNOWN;
 904
 905         return packet_id;
 906 }
 907
 908 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
 909                                           unsigned char *pkt,
 910                                           unsigned char pkt_id)
 911 {
 912         mt[0].x = ((pkt[2] & 0x80) << 4);
 913         mt[0].x |= ((pkt[2] & 0x3F) << 5);
 914         mt[0].x |= ((pkt[3] & 0x30) >> 1);
 915         mt[0].x |= (pkt[3] & 0x07);
 916         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
 917
 918         mt[1].x = ((pkt[3] & 0x80) << 4);
 919         mt[1].x |= ((pkt[4] & 0x80) << 3);
 920         mt[1].x |= ((pkt[4] & 0x3F) << 4);
 921         mt[1].y = ((pkt[5] & 0x80) << 3);
 922         mt[1].y |= ((pkt[5] & 0x3F) << 4);
 923
 924         switch (pkt_id) {
 925         case V7_PACKET_ID_TWO:
 926                 mt[1].x &= ~0x000F;
 927                 mt[1].y |= 0x000F;
 928                 break;
 929
 930         case V7_PACKET_ID_MULTI:
 931                 mt[1].x &= ~0x003F;
 932                 mt[1].y &= ~0x0020;
 933                 mt[1].y |= ((pkt[4] & 0x02) << 4);
 934                 mt[1].y |= 0x001F;
 935                 break;
 936
 937         case V7_PACKET_ID_NEW:
 938                 mt[1].x &= ~0x003F;
 939                 mt[1].x |= (pkt[0] & 0x20);
 940                 mt[1].y |= 0x000F;
 941                 break;
 942         }
 943
 944         mt[0].y = 0x7FF - mt[0].y;
 945         mt[1].y = 0x7FF - mt[1].y;
 946 }
 947
 948 static int alps_get_mt_count(struct input_mt_pos *mt)
 949 {
 950         int i, fingers = 0;
 951
 952         for (i = 0; i < MAX_TOUCHES; i++) {
 953                 if (mt[i].x != 0 || mt[i].y != 0)
 954                         fingers++;
 955         }
 956
 957         return fingers;
 958 }
 959
 960 static int alps_decode_packet_v7(struct alps_fields *f,
 961                                   unsigned char *p,
 962                                   struct psmouse *psmouse)
 963 {
 964         struct alps_data *priv = psmouse->private;
 965         unsigned char pkt_id;
 966
 967         pkt_id = alps_get_packet_id_v7(p);
 968         if (pkt_id == V7_PACKET_ID_IDLE)
 969                 return 0;
 970         if (pkt_id == V7_PACKET_ID_UNKNOWN)
 971                 return -1;
 972         /*
 973          * NEW packets are send to indicate a discontinuity in the finger
 974          * coordinate reporting. Specifically a finger may have moved from
 975          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
 976          * us.
 977          *
 978          * NEW packets have 3 problems:
 979          * 1) They do not contain middle / right button info (on non clickpads)
 980          *    this can be worked around by preserving the old button state
 981          * 2) They do not contain an accurate fingercount, and they are
 982          *    typically send when the number of fingers changes. We cannot use
 983          *    the old finger count as that may mismatch with the amount of
 984          *    touch coordinates we've available in the NEW packet
 985          * 3) Their x data for the second touch is inaccurate leading to
 986          *    a possible jump of the x coordinate by 16 units when the first
 987          *    non NEW packet comes in
 988          * Since problems 2 & 3 cannot be worked around, just ignore them.
 989          */
 990         if (pkt_id == V7_PACKET_ID_NEW)
 991                 return 1;
 992
 993         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
 994
 995         if (pkt_id == V7_PACKET_ID_TWO)
 996                 f->fingers = alps_get_mt_count(f->mt);
 997         else /* pkt_id == V7_PACKET_ID_MULTI */
 998                 f->fingers = 3 + (p[5] & 0x03);
 999
1000         f->left = (p[0] & 0x80) >> 7;
1001         if (priv->flags & ALPS_BUTTONPAD) {
1002                 if (p[0] & 0x20)
1003                         f->fingers++;
1004                 if (p[0] & 0x10)
1005                         f->fingers++;
1006         } else {
1007                 f->right = (p[0] & 0x20) >> 5;
1008                 f->middle = (p[0] & 0x10) >> 4;
1009         }
1010
1011         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1012         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1013                 f->mt[0].x = f->mt[1].x;
1014                 f->mt[0].y = f->mt[1].y;
1015                 f->mt[1].x = 0;
1016                 f->mt[1].y = 0;
1017         }
1018
1019         return 0;
1020 }
1021
1022 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1023 {
1024         struct alps_data *priv = psmouse->private;
1025         unsigned char *packet = psmouse->packet;
1026         struct input_dev *dev2 = priv->dev2;
1027         int x, y, z, left, right, middle;
1028
1029         /* It should be a DualPoint when received trackstick packet */
1030         if (!(priv->flags & ALPS_DUALPOINT)) {
1031                 psmouse_warn(psmouse,
1032                              "Rejected trackstick packet from non DualPoint device");
1033                 return;
1034         }
1035
1036         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1037         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1038             ((packet[3] & 0x20) << 1);
1039         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1040
1041         left = (packet[1] & 0x01);
1042         right = (packet[1] & 0x02) >> 1;
1043         middle = (packet[1] & 0x04) >> 2;
1044
1045         /* Divide 2 since trackpoint's speed is too fast */
1046         input_report_rel(dev2, REL_X, (char)x / 2);
1047         input_report_rel(dev2, REL_Y, -((char)y / 2));
1048
1049         input_report_key(dev2, BTN_LEFT, left);
1050         input_report_key(dev2, BTN_RIGHT, right);
1051         input_report_key(dev2, BTN_MIDDLE, middle);
1052
1053         input_sync(dev2);
1054 }
1055
1056 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1057 {
1058         struct alps_data *priv = psmouse->private;
1059         struct input_dev *dev = psmouse->dev;
1060         struct alps_fields *f = &priv->f;
1061
1062         memset(f, 0, sizeof(*f));
1063
1064         if (priv->decode_fields(f, psmouse->packet, psmouse))
1065                 return;
1066
1067         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1068
1069         input_mt_report_finger_count(dev, f->fingers);
1070
1071         input_report_key(dev, BTN_LEFT, f->left);
1072         input_report_key(dev, BTN_RIGHT, f->right);
1073         input_report_key(dev, BTN_MIDDLE, f->middle);
1074
1075         input_sync(dev);
1076 }
1077
1078 static void alps_process_packet_v7(struct psmouse *psmouse)
1079 {
1080         unsigned char *packet = psmouse->packet;
1081
1082         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1083                 alps_process_trackstick_packet_v7(psmouse);
1084         else
1085                 alps_process_touchpad_packet_v7(psmouse);
1086 }
1087
1088 static DEFINE_MUTEX(alps_mutex);
1089
1090 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1091 {
1092         struct alps_data *priv =
1093                 container_of(work, struct alps_data, dev3_register_work.work);
1094         struct psmouse *psmouse = priv->psmouse;
1095         struct input_dev *dev3;
1096         int error = 0;
1097
1098         mutex_lock(&alps_mutex);
1099
1100         if (priv->dev3)
1101                 goto out;
1102
1103         dev3 = input_allocate_device();
1104         if (!dev3) {
1105                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1106                 error = -ENOMEM;
1107                 goto out;
1108         }
1109
1110         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1111                  psmouse->ps2dev.serio->phys,
1112                  (priv->dev2 ? "input2" : "input1"));
1113         dev3->phys = priv->phys3;
1114
1115         /*
1116          * format of input device name is: "protocol vendor name"
1117          * see function psmouse_switch_protocol() in psmouse-base.c
1118          */
1119         dev3->name = "PS/2 ALPS Mouse";
1120
1121         dev3->id.bustype = BUS_I8042;
1122         dev3->id.vendor  = 0x0002;
1123         dev3->id.product = PSMOUSE_PS2;
1124         dev3->id.version = 0x0000;
1125         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1126
1127         input_set_capability(dev3, EV_REL, REL_X);
1128         input_set_capability(dev3, EV_REL, REL_Y);
1129         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1130         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1131         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1132
1133         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1134
1135         error = input_register_device(dev3);
1136         if (error) {
1137                 psmouse_err(psmouse,
1138                             "failed to register secondary device: %d\n",
1139                             error);
1140                 input_free_device(dev3);
1141                 goto out;
1142         }
1143
1144         priv->dev3 = dev3;
1145
1146 out:
1147         /*
1148          * Save the error code so that we can detect that we
1149          * already tried to create the device.
1150          */
1151         if (error)
1152                 priv->dev3 = ERR_PTR(error);
1153
1154         mutex_unlock(&alps_mutex);
1155 }
1156
1157 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1158                                         unsigned char packet[],
1159                                         bool report_buttons)
1160 {
1161         struct alps_data *priv = psmouse->private;
1162         struct input_dev *dev, *dev2 = NULL;
1163
1164         /* Figure out which device to use to report the bare packet */
1165         if (priv->proto_version == ALPS_PROTO_V2 &&
1166             (priv->flags & ALPS_DUALPOINT)) {
1167                 /* On V2 devices the DualPoint Stick reports bare packets */
1168                 dev = priv->dev2;
1169                 dev2 = psmouse->dev;
1170         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1171                 /* Register dev3 mouse if we received PS/2 packet first time */
1172                 if (!IS_ERR(priv->dev3))
1173                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1174                                            0);
1175                 return;
1176         } else {
1177                 dev = priv->dev3;
1178         }
1179
1180         if (report_buttons)
1181                 alps_report_buttons(dev, dev2,
1182                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1183
1184         input_report_rel(dev, REL_X,
1185                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1186         input_report_rel(dev, REL_Y,
1187                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1188
1189         input_sync(dev);
1190 }
1191
1192 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1193 {
1194         struct alps_data *priv = psmouse->private;
1195
1196         if (psmouse->pktcnt < 6)
1197                 return PSMOUSE_GOOD_DATA;
1198
1199         if (psmouse->pktcnt == 6) {
1200                 /*
1201                  * Start a timer to flush the packet if it ends up last
1202                  * 6-byte packet in the stream. Timer needs to fire
1203                  * psmouse core times out itself. 20 ms should be enough
1204                  * to decide if we are getting more data or not.
1205                  */
1206                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1207                 return PSMOUSE_GOOD_DATA;
1208         }
1209
1210         del_timer(&priv->timer);
1211
1212         if (psmouse->packet[6] & 0x80) {
1213
1214                 /*
1215                  * Highest bit is set - that means we either had
1216                  * complete ALPS packet and this is start of the
1217                  * next packet or we got garbage.
1218                  */
1219
1220                 if (((psmouse->packet[3] |
1221                       psmouse->packet[4] |
1222                       psmouse->packet[5]) & 0x80) ||
1223                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1224                         psmouse_dbg(psmouse,
1225                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1226                                     psmouse->packet + 3);
1227                         return PSMOUSE_BAD_DATA;
1228                 }
1229
1230                 priv->process_packet(psmouse);
1231
1232                 /* Continue with the next packet */
1233                 psmouse->packet[0] = psmouse->packet[6];
1234                 psmouse->pktcnt = 1;
1235
1236         } else {
1237
1238                 /*
1239                  * High bit is 0 - that means that we indeed got a PS/2
1240                  * packet in the middle of ALPS packet.
1241                  *
1242                  * There is also possibility that we got 6-byte ALPS
1243                  * packet followed  by 3-byte packet from trackpoint. We
1244                  * can not distinguish between these 2 scenarios but
1245                  * because the latter is unlikely to happen in course of
1246                  * normal operation (user would need to press all
1247                  * buttons on the pad and start moving trackpoint
1248                  * without touching the pad surface) we assume former.
1249                  * Even if we are wrong the wost thing that would happen
1250                  * the cursor would jump but we should not get protocol
1251                  * de-synchronization.
1252                  */
1253
1254                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1255                                             false);
1256
1257                 /*
1258                  * Continue with the standard ALPS protocol handling,
1259                  * but make sure we won't process it as an interleaved
1260                  * packet again, which may happen if all buttons are
1261                  * pressed. To avoid this let's reset the 4th bit which
1262                  * is normally 1.
1263                  */
1264                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1265                 psmouse->pktcnt = 4;
1266         }
1267
1268         return PSMOUSE_GOOD_DATA;
1269 }
1270
1271 static void alps_flush_packet(unsigned long data)
1272 {
1273         struct psmouse *psmouse = (struct psmouse *)data;
1274         struct alps_data *priv = psmouse->private;
1275
1276         serio_pause_rx(psmouse->ps2dev.serio);
1277
1278         if (psmouse->pktcnt == psmouse->pktsize) {
1279
1280                 /*
1281                  * We did not any more data in reasonable amount of time.
1282                  * Validate the last 3 bytes and process as a standard
1283                  * ALPS packet.
1284                  */
1285                 if ((psmouse->packet[3] |
1286                      psmouse->packet[4] |
1287                      psmouse->packet[5]) & 0x80) {
1288                         psmouse_dbg(psmouse,
1289                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1290                                     psmouse->packet + 3);
1291                 } else {
1292                         priv->process_packet(psmouse);
1293                 }
1294                 psmouse->pktcnt = 0;
1295         }
1296
1297         serio_continue_rx(psmouse->ps2dev.serio);
1298 }
1299
1300 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1301 {
1302         struct alps_data *priv = psmouse->private;
1303
1304         /*
1305          * Check if we are dealing with a bare PS/2 packet, presumably from
1306          * a device connected to the external PS/2 port. Because bare PS/2
1307          * protocol does not have enough constant bits to self-synchronize
1308          * properly we only do this if the device is fully synchronized.
1309          */
1310         if (!psmouse->out_of_sync_cnt && (psmouse->packet[0] & 0xc8) == 0x08) {
1311                 if (psmouse->pktcnt == 3) {
1312                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1313                                                     true);
1314                         return PSMOUSE_FULL_PACKET;
1315                 }
1316                 return PSMOUSE_GOOD_DATA;
1317         }
1318
1319         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1320
1321         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1322             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1323                 return alps_handle_interleaved_ps2(psmouse);
1324         }
1325
1326         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1327                 psmouse_dbg(psmouse,
1328                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1329                             psmouse->packet[0], priv->mask0, priv->byte0);
1330                 return PSMOUSE_BAD_DATA;
1331         }
1332
1333         /* Bytes 2 - pktsize should have 0 in the highest bit */
1334         if (priv->proto_version < ALPS_PROTO_V5 &&
1335             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1336             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1337                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1338                             psmouse->pktcnt - 1,
1339                             psmouse->packet[psmouse->pktcnt - 1]);
1340
1341                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1342                     psmouse->pktcnt == psmouse->pktsize) {
1343                         /*
1344                          * Some Dell boxes, such as Latitude E6440 or E7440
1345                          * with closed lid, quite often smash last byte of
1346                          * otherwise valid packet with 0xff. Given that the
1347                          * next packet is very likely to be valid let's
1348                          * report PSMOUSE_FULL_PACKET but not process data,
1349                          * rather than reporting PSMOUSE_BAD_DATA and
1350                          * filling the logs.
1351                          */
1352                         return PSMOUSE_FULL_PACKET;
1353                 }
1354
1355                 return PSMOUSE_BAD_DATA;
1356         }
1357
1358         if (priv->proto_version == ALPS_PROTO_V7 &&
1359             !alps_is_valid_package_v7(psmouse)) {
1360                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1361                             psmouse->pktcnt - 1,
1362                             psmouse->packet[psmouse->pktcnt - 1]);
1363                 return PSMOUSE_BAD_DATA;
1364         }
1365
1366         if (psmouse->pktcnt == psmouse->pktsize) {
1367                 priv->process_packet(psmouse);
1368                 return PSMOUSE_FULL_PACKET;
1369         }
1370
1371         return PSMOUSE_GOOD_DATA;
1372 }
1373
1374 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1375 {
1376         struct ps2dev *ps2dev = &psmouse->ps2dev;
1377         struct alps_data *priv = psmouse->private;
1378         int command;
1379         unsigned char *param;
1380         unsigned char dummy[4];
1381
1382         BUG_ON(nibble > 0xf);
1383
1384         command = priv->nibble_commands[nibble].command;
1385         param = (command & 0x0f00) ?
1386                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1387
1388         if (ps2_command(ps2dev, param, command))
1389                 return -1;
1390
1391         return 0;
1392 }
1393
1394 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1395 {
1396         struct ps2dev *ps2dev = &psmouse->ps2dev;
1397         struct alps_data *priv = psmouse->private;
1398         int i, nibble;
1399
1400         if (ps2_command(ps2dev, NULL, priv->addr_command))
1401                 return -1;
1402
1403         for (i = 12; i >= 0; i -= 4) {
1404                 nibble = (addr >> i) & 0xf;
1405                 if (alps_command_mode_send_nibble(psmouse, nibble))
1406                         return -1;
1407         }
1408
1409         return 0;
1410 }
1411
1412 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1413 {
1414         struct ps2dev *ps2dev = &psmouse->ps2dev;
1415         unsigned char param[4];
1416
1417         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1418                 return -1;
1419
1420         /*
1421          * The address being read is returned in the first two bytes
1422          * of the result. Check that this address matches the expected
1423          * address.
1424          */
1425         if (addr != ((param[0] << 8) | param[1]))
1426                 return -1;
1427
1428         return param[2];
1429 }
1430
1431 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1432 {
1433         if (alps_command_mode_set_addr(psmouse, addr))
1434                 return -1;
1435         return __alps_command_mode_read_reg(psmouse, addr);
1436 }
1437
1438 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1439 {
1440         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1441                 return -1;
1442         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1443                 return -1;
1444         return 0;
1445 }
1446
1447 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1448                                        u8 value)
1449 {
1450         if (alps_command_mode_set_addr(psmouse, addr))
1451                 return -1;
1452         return __alps_command_mode_write_reg(psmouse, value);
1453 }
1454
1455 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1456                         int repeated_command, unsigned char *param)
1457 {
1458         struct ps2dev *ps2dev = &psmouse->ps2dev;
1459
1460         param[0] = 0;
1461         if (init_command && ps2_command(ps2dev, param, init_command))
1462                 return -EIO;
1463
1464         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1465             ps2_command(ps2dev,  NULL, repeated_command) ||
1466             ps2_command(ps2dev,  NULL, repeated_command))
1467                 return -EIO;
1468
1469         param[0] = param[1] = param[2] = 0xff;
1470         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1471                 return -EIO;
1472
1473         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1474                     repeated_command, param);
1475         return 0;
1476 }
1477
1478 static bool alps_check_valid_firmware_id(unsigned char id[])
1479 {
1480         if (id[0] == 0x73)
1481                 return true;
1482
1483         if (id[0] == 0x88 &&
1484             (id[1] == 0x07 ||
1485              id[1] == 0x08 ||
1486              (id[1] & 0xf0) == 0xb0 ||
1487              (id[1] & 0xf0) == 0xc0)) {
1488                 return true;
1489         }
1490
1491         return false;
1492 }
1493
1494 static int alps_enter_command_mode(struct psmouse *psmouse)
1495 {
1496         unsigned char param[4];
1497
1498         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1499                 psmouse_err(psmouse, "failed to enter command mode\n");
1500                 return -1;
1501         }
1502
1503         if (!alps_check_valid_firmware_id(param)) {
1504                 psmouse_dbg(psmouse,
1505                             "unknown response while entering command mode\n");
1506                 return -1;
1507         }
1508         return 0;
1509 }
1510
1511 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1512 {
1513         struct ps2dev *ps2dev = &psmouse->ps2dev;
1514         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1515                 return -1;
1516         return 0;
1517 }
1518
1519 /*
1520  * For DualPoint devices select the device that should respond to
1521  * subsequent commands. It looks like glidepad is behind stickpointer,
1522  * I'd thought it would be other way around...
1523  */
1524 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1525 {
1526         struct ps2dev *ps2dev = &psmouse->ps2dev;
1527         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1528
1529         if (ps2_command(ps2dev, NULL, cmd) ||
1530             ps2_command(ps2dev, NULL, cmd) ||
1531             ps2_command(ps2dev, NULL, cmd) ||
1532             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1533                 return -1;
1534
1535         /* we may get 3 more bytes, just ignore them */
1536         ps2_drain(ps2dev, 3, 100);
1537
1538         return 0;
1539 }
1540
1541 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1542 {
1543         struct ps2dev *ps2dev = &psmouse->ps2dev;
1544
1545         /* Try ALPS magic knock - 4 disable before enable */
1546         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1547             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1548             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1549             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1550             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1551                 return -1;
1552
1553         /*
1554          * Switch mouse to poll (remote) mode so motion data will not
1555          * get in our way
1556          */
1557         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1558 }
1559
1560 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1561 {
1562         int i, nibble;
1563
1564         /*
1565          * b0-b11 are valid bits, send sequence is inverse.
1566          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1567          */
1568         for (i = 0; i <= 8; i += 4) {
1569                 nibble = (word >> i) & 0xf;
1570                 if (alps_command_mode_send_nibble(psmouse, nibble))
1571                         return -1;
1572         }
1573
1574         return 0;
1575 }
1576
1577 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1578                                        u16 addr, u16 value)
1579 {
1580         struct ps2dev *ps2dev = &psmouse->ps2dev;
1581
1582         /* 0x0A0 is the command to write the word */
1583         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1584             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1585             alps_monitor_mode_send_word(psmouse, addr) ||
1586             alps_monitor_mode_send_word(psmouse, value) ||
1587             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1588                 return -1;
1589
1590         return 0;
1591 }
1592
1593 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1594 {
1595         struct ps2dev *ps2dev = &psmouse->ps2dev;
1596
1597         if (enable) {
1598                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1599                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1600                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1601                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1602                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1603                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1604                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1605                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1606                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1607                         return -1;
1608         } else {
1609                 /* EC to exit monitor mode */
1610                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1611                         return -1;
1612         }
1613
1614         return 0;
1615 }
1616
1617 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1618 {
1619         u16 reg_val = 0x181;
1620         int ret = -1;
1621
1622         /* enter monitor mode, to write the register */
1623         if (alps_monitor_mode(psmouse, true))
1624                 return -1;
1625
1626         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1627
1628         if (alps_monitor_mode(psmouse, false))
1629                 ret = -1;
1630
1631         return ret;
1632 }
1633
1634 static int alps_get_status(struct psmouse *psmouse, char *param)
1635 {
1636         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1637         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1638                 return -1;
1639
1640         return 0;
1641 }
1642
1643 /*
1644  * Turn touchpad tapping on or off. The sequences are:
1645  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1646  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1647  * My guess that 0xE9 (GetInfo) is here as a sync point.
1648  * For models that also have stickpointer (DualPoints) its tapping
1649  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1650  * we don't fiddle with it.
1651  */
1652 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1653 {
1654         struct ps2dev *ps2dev = &psmouse->ps2dev;
1655         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1656         unsigned char tap_arg = enable ? 0x0A : 0x00;
1657         unsigned char param[4];
1658
1659         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1660             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1661             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1662             ps2_command(ps2dev, &tap_arg, cmd))
1663                 return -1;
1664
1665         if (alps_get_status(psmouse, param))
1666                 return -1;
1667
1668         return 0;
1669 }
1670
1671 /*
1672  * alps_poll() - poll the touchpad for current motion packet.
1673  * Used in resync.
1674  */
1675 static int alps_poll(struct psmouse *psmouse)
1676 {
1677         struct alps_data *priv = psmouse->private;
1678         unsigned char buf[sizeof(psmouse->packet)];
1679         bool poll_failed;
1680
1681         if (priv->flags & ALPS_PASS)
1682                 alps_passthrough_mode_v2(psmouse, true);
1683
1684         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1685                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1686
1687         if (priv->flags & ALPS_PASS)
1688                 alps_passthrough_mode_v2(psmouse, false);
1689
1690         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1691                 return -1;
1692
1693         if ((psmouse->badbyte & 0xc8) == 0x08) {
1694 /*
1695  * Poll the track stick ...
1696  */
1697                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1698                         return -1;
1699         }
1700
1701         memcpy(psmouse->packet, buf, sizeof(buf));
1702         return 0;
1703 }
1704
1705 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1706 {
1707         struct alps_data *priv = psmouse->private;
1708
1709         if ((priv->flags & ALPS_PASS) &&
1710             alps_passthrough_mode_v2(psmouse, true)) {
1711                 return -1;
1712         }
1713
1714         if (alps_tap_mode(psmouse, true)) {
1715                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1716                 return -1;
1717         }
1718
1719         if (alps_absolute_mode_v1_v2(psmouse)) {
1720                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1721                 return -1;
1722         }
1723
1724         if ((priv->flags & ALPS_PASS) &&
1725             alps_passthrough_mode_v2(psmouse, false)) {
1726                 return -1;
1727         }
1728
1729         /* ALPS needs stream mode, otherwise it won't report any data */
1730         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1731                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1732                 return -1;
1733         }
1734
1735         return 0;
1736 }
1737
1738 static int alps_hw_init_v6(struct psmouse *psmouse)
1739 {
1740         unsigned char param[2] = {0xC8, 0x14};
1741
1742         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1743         if (alps_passthrough_mode_v2(psmouse, true))
1744                 return -1;
1745
1746         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1747             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1748             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1749             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1750             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1751                 return -1;
1752
1753         if (alps_passthrough_mode_v2(psmouse, false))
1754                 return -1;
1755
1756         if (alps_absolute_mode_v6(psmouse)) {
1757                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1758                 return -1;
1759         }
1760
1761         return 0;
1762 }
1763
1764 /*
1765  * Enable or disable passthrough mode to the trackstick.
1766  */
1767 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1768                                     int reg_base, bool enable)
1769 {
1770         int reg_val, ret = -1;
1771
1772         if (alps_enter_command_mode(psmouse))
1773                 return -1;
1774
1775         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1776         if (reg_val == -1)
1777                 goto error;
1778
1779         if (enable)
1780                 reg_val |= 0x01;
1781         else
1782                 reg_val &= ~0x01;
1783
1784         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1785
1786 error:
1787         if (alps_exit_command_mode(psmouse))
1788                 ret = -1;
1789         return ret;
1790 }
1791
1792 /* Must be in command mode when calling this function */
1793 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1794 {
1795         int reg_val;
1796
1797         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1798         if (reg_val == -1)
1799                 return -1;
1800
1801         reg_val |= 0x06;
1802         if (__alps_command_mode_write_reg(psmouse, reg_val))
1803                 return -1;
1804
1805         return 0;
1806 }
1807
1808 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
1809 {
1810         int ret = -EIO, reg_val;
1811
1812         if (alps_enter_command_mode(psmouse))
1813                 goto error;
1814
1815         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
1816         if (reg_val == -1)
1817                 goto error;
1818
1819         /* bit 7: trackstick is present */
1820         ret = reg_val & 0x80 ? 0 : -ENODEV;
1821
1822 error:
1823         alps_exit_command_mode(psmouse);
1824         return ret;
1825 }
1826
1827 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
1828 {
1829         struct ps2dev *ps2dev = &psmouse->ps2dev;
1830         int ret = 0;
1831         unsigned char param[4];
1832
1833         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
1834                 return -EIO;
1835
1836         /*
1837          * E7 report for the trackstick
1838          *
1839          * There have been reports of failures to seem to trace back
1840          * to the above trackstick check failing. When these occur
1841          * this E7 report fails, so when that happens we continue
1842          * with the assumption that there isn't a trackstick after
1843          * all.
1844          */
1845         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
1846                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
1847                 ret = -ENODEV;
1848         } else {
1849                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
1850
1851                 /*
1852                  * Not sure what this does, but it is absolutely
1853                  * essential. Without it, the touchpad does not
1854                  * work at all and the trackstick just emits normal
1855                  * PS/2 packets.
1856                  */
1857                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1858                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1859                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1860                     alps_command_mode_send_nibble(psmouse, 0x9) ||
1861                     alps_command_mode_send_nibble(psmouse, 0x4)) {
1862                         psmouse_err(psmouse,
1863                                     "Error sending magic E6 sequence\n");
1864                         ret = -EIO;
1865                         goto error;
1866                 }
1867
1868                 /*
1869                  * This ensures the trackstick packets are in the format
1870                  * supported by this driver. If bit 1 isn't set the packet
1871                  * format is different.
1872                  */
1873                 if (alps_enter_command_mode(psmouse) ||
1874                     alps_command_mode_write_reg(psmouse,
1875                                                 reg_base + 0x08, 0x82) ||
1876                     alps_exit_command_mode(psmouse))
1877                         ret = -EIO;
1878         }
1879
1880 error:
1881         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
1882                 ret = -EIO;
1883
1884         return ret;
1885 }
1886
1887 static int alps_hw_init_v3(struct psmouse *psmouse)
1888 {
1889         struct ps2dev *ps2dev = &psmouse->ps2dev;
1890         int reg_val;
1891         unsigned char param[4];
1892
1893         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
1894         if (reg_val == -EIO)
1895                 goto error;
1896
1897         if (reg_val == 0 &&
1898             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
1899                 goto error;
1900
1901         if (alps_enter_command_mode(psmouse) ||
1902             alps_absolute_mode_v3(psmouse)) {
1903                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1904                 goto error;
1905         }
1906
1907         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1908         if (reg_val == -1)
1909                 goto error;
1910         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1911                 goto error;
1912
1913         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1914         if (reg_val == -1)
1915                 goto error;
1916         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1917                 goto error;
1918
1919         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1920                 goto error;
1921         if (__alps_command_mode_write_reg(psmouse, 0x04))
1922                 goto error;
1923
1924         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1925                 goto error;
1926         if (__alps_command_mode_write_reg(psmouse, 0x03))
1927                 goto error;
1928
1929         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1930                 goto error;
1931         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1932                 goto error;
1933
1934         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1935                 goto error;
1936         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1937                 goto error;
1938
1939         alps_exit_command_mode(psmouse);
1940
1941         /* Set rate and enable data reporting */
1942         param[0] = 0x64;
1943         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1944             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1945                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1946                 return -1;
1947         }
1948
1949         return 0;
1950
1951 error:
1952         /*
1953          * Leaving the touchpad in command mode will essentially render
1954          * it unusable until the machine reboots, so exit it here just
1955          * to be safe
1956          */
1957         alps_exit_command_mode(psmouse);
1958         return -1;
1959 }
1960
1961 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
1962 {
1963         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
1964         struct alps_data *priv = psmouse->private;
1965
1966         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
1967         if (reg < 0)
1968                 return reg;
1969
1970         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1971         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
1972
1973         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
1974         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
1975
1976         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
1977         if (reg < 0)
1978                 return reg;
1979
1980         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1981         x_electrode = 17 + x_electrode;
1982
1983         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
1984         y_electrode = 13 + y_electrode;
1985
1986         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
1987         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
1988
1989         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
1990         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
1991
1992         psmouse_dbg(psmouse,
1993                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
1994                     x_pitch, y_pitch, x_electrode, y_electrode,
1995                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
1996
1997         return 0;
1998 }
1999
2000 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2001 {
2002         struct alps_data *priv = psmouse->private;
2003         struct ps2dev *ps2dev = &psmouse->ps2dev;
2004         int reg_val, ret = -1;
2005
2006         if (priv->flags & ALPS_DUALPOINT) {
2007                 reg_val = alps_setup_trackstick_v3(psmouse,
2008                                                    ALPS_REG_BASE_RUSHMORE);
2009                 if (reg_val == -EIO)
2010                         goto error;
2011         }
2012
2013         if (alps_enter_command_mode(psmouse) ||
2014             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2015             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2016                 goto error;
2017
2018         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2019                 goto error;
2020
2021         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2022         if (reg_val == -1)
2023                 goto error;
2024         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2025                 goto error;
2026
2027         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2028                 goto error;
2029
2030         /* enter absolute mode */
2031         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2032         if (reg_val == -1)
2033                 goto error;
2034         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2035                 goto error;
2036
2037         alps_exit_command_mode(psmouse);
2038         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2039
2040 error:
2041         alps_exit_command_mode(psmouse);
2042         return ret;
2043 }
2044
2045 /* Must be in command mode when calling this function */
2046 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2047 {
2048         int reg_val;
2049
2050         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2051         if (reg_val == -1)
2052                 return -1;
2053
2054         reg_val |= 0x02;
2055         if (__alps_command_mode_write_reg(psmouse, reg_val))
2056                 return -1;
2057
2058         return 0;
2059 }
2060
2061 static int alps_hw_init_v4(struct psmouse *psmouse)
2062 {
2063         struct ps2dev *ps2dev = &psmouse->ps2dev;
2064         unsigned char param[4];
2065
2066         if (alps_enter_command_mode(psmouse))
2067                 goto error;
2068
2069         if (alps_absolute_mode_v4(psmouse)) {
2070                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2071                 goto error;
2072         }
2073
2074         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2075                 goto error;
2076
2077         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2078                 goto error;
2079
2080         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2081                 goto error;
2082
2083         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2084                 goto error;
2085
2086         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2087                 goto error;
2088
2089         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2090                 goto error;
2091
2092         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2093                 goto error;
2094
2095         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2096                 goto error;
2097
2098         alps_exit_command_mode(psmouse);
2099
2100         /*
2101          * This sequence changes the output from a 9-byte to an
2102          * 8-byte format. All the same data seems to be present,
2103          * just in a more compact format.
2104          */
2105         param[0] = 0xc8;
2106         param[1] = 0x64;
2107         param[2] = 0x50;
2108         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2109             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2110             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2111             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2112                 return -1;
2113
2114         /* Set rate and enable data reporting */
2115         param[0] = 0x64;
2116         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2117             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2118                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2119                 return -1;
2120         }
2121
2122         return 0;
2123
2124 error:
2125         /*
2126          * Leaving the touchpad in command mode will essentially render
2127          * it unusable until the machine reboots, so exit it here just
2128          * to be safe
2129          */
2130         alps_exit_command_mode(psmouse);
2131         return -1;
2132 }
2133
2134 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2135                                         struct alps_data *priv)
2136 {
2137         struct ps2dev *ps2dev = &psmouse->ps2dev;
2138         unsigned char param[4] = {0};
2139         int num_x_electrode, num_y_electrode;
2140
2141         if (alps_enter_command_mode(psmouse))
2142                 return -1;
2143
2144         param[0] = 0x0a;
2145         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2146             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2147             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2148             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2149             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2150                 return -1;
2151
2152         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2153                 return -1;
2154
2155         /*
2156          * Dolphin's sensor line number is not fixed. It can be calculated
2157          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2158          * Further more, we can get device's x_max and y_max by multiplying
2159          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2160          *
2161          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2162          *      real sensor line number X = 11 + 8 = 19, and
2163          *      real sensor line number Y = 8 + 1 = 9.
2164          *      So, x_max = (19 - 1) * 64 = 1152, and
2165          *          y_max = (9 - 1) * 64 = 512.
2166          */
2167         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2168         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2169         priv->x_bits = num_x_electrode;
2170         priv->y_bits = num_y_electrode;
2171         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2172         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2173
2174         if (alps_exit_command_mode(psmouse))
2175                 return -1;
2176
2177         return 0;
2178 }
2179
2180 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2181 {
2182         struct ps2dev *ps2dev = &psmouse->ps2dev;
2183         unsigned char param[2];
2184
2185         /* This is dolphin "v1" as empirically defined by florin9doi */
2186         param[0] = 0x64;
2187         param[1] = 0x28;
2188
2189         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2190             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2191             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2192                 return -1;
2193
2194         return 0;
2195 }
2196
2197 static int alps_hw_init_v7(struct psmouse *psmouse)
2198 {
2199         struct ps2dev *ps2dev = &psmouse->ps2dev;
2200         int reg_val, ret = -1;
2201
2202         if (alps_enter_command_mode(psmouse) ||
2203             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2204                 goto error;
2205
2206         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2207                 goto error;
2208
2209         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2210                 goto error;
2211
2212         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2213         if (reg_val == -1)
2214                 goto error;
2215         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2216                 goto error;
2217
2218         alps_exit_command_mode(psmouse);
2219         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2220
2221 error:
2222         alps_exit_command_mode(psmouse);
2223         return ret;
2224 }
2225
2226 static int alps_set_protocol(struct psmouse *psmouse,
2227                              struct alps_data *priv,
2228                              const struct alps_protocol_info *protocol)
2229 {
2230         psmouse->private = priv;
2231
2232         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2233
2234         priv->proto_version = protocol->version;
2235         priv->byte0 = protocol->byte0;
2236         priv->mask0 = protocol->mask0;
2237         priv->flags = protocol->flags;
2238
2239         priv->x_max = 2000;
2240         priv->y_max = 1400;
2241         priv->x_bits = 15;
2242         priv->y_bits = 11;
2243
2244         switch (priv->proto_version) {
2245         case ALPS_PROTO_V1:
2246         case ALPS_PROTO_V2:
2247                 priv->hw_init = alps_hw_init_v1_v2;
2248                 priv->process_packet = alps_process_packet_v1_v2;
2249                 priv->set_abs_params = alps_set_abs_params_st;
2250                 priv->x_max = 1023;
2251                 priv->y_max = 767;
2252                 break;
2253
2254         case ALPS_PROTO_V3:
2255                 priv->hw_init = alps_hw_init_v3;
2256                 priv->process_packet = alps_process_packet_v3;
2257                 priv->set_abs_params = alps_set_abs_params_mt;
2258                 priv->decode_fields = alps_decode_pinnacle;
2259                 priv->nibble_commands = alps_v3_nibble_commands;
2260                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2261                 break;
2262
2263         case ALPS_PROTO_V3_RUSHMORE:
2264                 priv->hw_init = alps_hw_init_rushmore_v3;
2265                 priv->process_packet = alps_process_packet_v3;
2266                 priv->set_abs_params = alps_set_abs_params_mt;
2267                 priv->decode_fields = alps_decode_rushmore;
2268                 priv->nibble_commands = alps_v3_nibble_commands;
2269                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2270                 priv->x_bits = 16;
2271                 priv->y_bits = 12;
2272
2273                 if (alps_probe_trackstick_v3(psmouse,
2274                                              ALPS_REG_BASE_RUSHMORE) < 0)
2275                         priv->flags &= ~ALPS_DUALPOINT;
2276
2277                 break;
2278
2279         case ALPS_PROTO_V4:
2280                 priv->hw_init = alps_hw_init_v4;
2281                 priv->process_packet = alps_process_packet_v4;
2282                 priv->set_abs_params = alps_set_abs_params_mt;
2283                 priv->nibble_commands = alps_v4_nibble_commands;
2284                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2285                 break;
2286
2287         case ALPS_PROTO_V5:
2288                 priv->hw_init = alps_hw_init_dolphin_v1;
2289                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2290                 priv->decode_fields = alps_decode_dolphin;
2291                 priv->set_abs_params = alps_set_abs_params_mt;
2292                 priv->nibble_commands = alps_v3_nibble_commands;
2293                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2294                 priv->x_bits = 23;
2295                 priv->y_bits = 12;
2296
2297                 if (alps_dolphin_get_device_area(psmouse, priv))
2298                         return -EIO;
2299
2300                 break;
2301
2302         case ALPS_PROTO_V6:
2303                 priv->hw_init = alps_hw_init_v6;
2304                 priv->process_packet = alps_process_packet_v6;
2305                 priv->set_abs_params = alps_set_abs_params_st;
2306                 priv->nibble_commands = alps_v6_nibble_commands;
2307                 priv->x_max = 2047;
2308                 priv->y_max = 1535;
2309                 break;
2310
2311         case ALPS_PROTO_V7:
2312                 priv->hw_init = alps_hw_init_v7;
2313                 priv->process_packet = alps_process_packet_v7;
2314                 priv->decode_fields = alps_decode_packet_v7;
2315                 priv->set_abs_params = alps_set_abs_params_mt;
2316                 priv->nibble_commands = alps_v3_nibble_commands;
2317                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2318                 priv->x_max = 0xfff;
2319                 priv->y_max = 0x7ff;
2320
2321                 if (priv->fw_ver[1] != 0xba)
2322                         priv->flags |= ALPS_BUTTONPAD;
2323
2324                 break;
2325         }
2326
2327         return 0;
2328 }
2329
2330 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2331                                                          unsigned char *ec)
2332 {
2333         const struct alps_model_info *model;
2334         int i;
2335
2336         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2337                 model = &alps_model_data[i];
2338
2339                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2340                     (!model->command_mode_resp ||
2341                      model->command_mode_resp == ec[2])) {
2342
2343                         return &model->protocol_info;
2344                 }
2345         }
2346
2347         return NULL;
2348 }
2349
2350 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2351 {
2352         const struct alps_protocol_info *protocol;
2353         unsigned char e6[4], e7[4], ec[4];
2354         int error;
2355
2356         /*
2357          * First try "E6 report".
2358          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2359          * The bits 0-2 of the first byte will be 1s if some buttons are
2360          * pressed.
2361          */
2362         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2363                          PSMOUSE_CMD_SETSCALE11, e6))
2364                 return -EIO;
2365
2366         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2367                 return -EINVAL;
2368
2369         /*
2370          * Now get the "E7" and "EC" reports.  These will uniquely identify
2371          * most ALPS touchpads.
2372          */
2373         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2374                          PSMOUSE_CMD_SETSCALE21, e7) ||
2375             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2376                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2377             alps_exit_command_mode(psmouse))
2378                 return -EIO;
2379
2380         protocol = alps_match_table(e7, ec);
2381         if (!protocol) {
2382                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2383                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2384                         protocol = &alps_v5_protocol_data;
2385                 } else if (ec[0] == 0x88 &&
2386                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2387                         protocol = &alps_v7_protocol_data;
2388                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2389                         protocol = &alps_v3_rushmore_data;
2390                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2391                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2392                         protocol = &alps_v3_protocol_data;
2393                 } else {
2394                         psmouse_dbg(psmouse,
2395                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2396                         return -EINVAL;
2397                 }
2398         }
2399
2400         if (priv) {
2401                 /* Save the Firmware version */
2402                 memcpy(priv->fw_ver, ec, 3);
2403                 error = alps_set_protocol(psmouse, priv, protocol);
2404                 if (error)
2405                         return error;
2406         }
2407
2408         return 0;
2409 }
2410
2411 static int alps_reconnect(struct psmouse *psmouse)
2412 {
2413         struct alps_data *priv = psmouse->private;
2414
2415         psmouse_reset(psmouse);
2416
2417         if (alps_identify(psmouse, priv) < 0)
2418                 return -1;
2419
2420         return priv->hw_init(psmouse);
2421 }
2422
2423 static void alps_disconnect(struct psmouse *psmouse)
2424 {
2425         struct alps_data *priv = psmouse->private;
2426
2427         psmouse_reset(psmouse);
2428         del_timer_sync(&priv->timer);
2429         if (priv->dev2)
2430                 input_unregister_device(priv->dev2);
2431         if (!IS_ERR_OR_NULL(priv->dev3))
2432                 input_unregister_device(priv->dev3);
2433         kfree(priv);
2434 }
2435
2436 static void alps_set_abs_params_st(struct alps_data *priv,
2437                                    struct input_dev *dev1)
2438 {
2439         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2440         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2441 }
2442
2443 static void alps_set_abs_params_mt(struct alps_data *priv,
2444                                    struct input_dev *dev1)
2445 {
2446         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2447         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2448
2449         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2450         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2451
2452         input_mt_init_slots(dev1, MAX_TOUCHES, INPUT_MT_POINTER |
2453                 INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2454
2455         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2456         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2457
2458         /* V7 is real multi-touch */
2459         if (priv->proto_version == ALPS_PROTO_V7)
2460                 clear_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
2461 }
2462
2463 int alps_init(struct psmouse *psmouse)
2464 {
2465         struct alps_data *priv = psmouse->private;
2466         struct input_dev *dev1 = psmouse->dev;
2467         int error;
2468
2469         error = priv->hw_init(psmouse);
2470         if (error)
2471                 goto init_fail;
2472
2473         /*
2474          * Undo part of setup done for us by psmouse core since touchpad
2475          * is not a relative device.
2476          */
2477         __clear_bit(EV_REL, dev1->evbit);
2478         __clear_bit(REL_X, dev1->relbit);
2479         __clear_bit(REL_Y, dev1->relbit);
2480
2481         /*
2482          * Now set up our capabilities.
2483          */
2484         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2485         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2486         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2487         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2488                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2489
2490         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2491
2492         priv->set_abs_params(priv, dev1);
2493         /* No pressure on V7 */
2494         if (priv->proto_version != ALPS_PROTO_V7)
2495                 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2496
2497         if (priv->flags & ALPS_WHEEL) {
2498                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2499                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2500         }
2501
2502         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2503                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2504                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2505         }
2506
2507         if (priv->flags & ALPS_FOUR_BUTTONS) {
2508                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2509                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2510                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2511                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2512         } else if (priv->flags & ALPS_BUTTONPAD) {
2513                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2514                 clear_bit(BTN_RIGHT, dev1->keybit);
2515         } else {
2516                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2517         }
2518
2519         if (priv->flags & ALPS_DUALPOINT) {
2520                 struct input_dev *dev2;
2521
2522                 dev2 = input_allocate_device();
2523                 if (!dev2) {
2524                         psmouse_err(psmouse,
2525                                     "failed to allocate trackstick device\n");
2526                         error = -ENOMEM;
2527                         goto init_fail;
2528                 }
2529
2530                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2531                          psmouse->ps2dev.serio->phys);
2532                 dev2->phys = priv->phys2;
2533
2534                 /*
2535                  * format of input device name is: "protocol vendor name"
2536                  * see function psmouse_switch_protocol() in psmouse-base.c
2537                  */
2538                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2539
2540                 dev2->id.bustype = BUS_I8042;
2541                 dev2->id.vendor  = 0x0002;
2542                 dev2->id.product = PSMOUSE_ALPS;
2543                 dev2->id.version = priv->proto_version;
2544                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2545
2546                 input_set_capability(dev2, EV_REL, REL_X);
2547                 input_set_capability(dev2, EV_REL, REL_Y);
2548                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2549                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2550                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2551
2552                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2553                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2554
2555                 error = input_register_device(dev2);
2556                 if (error) {
2557                         psmouse_err(psmouse,
2558                                     "failed to register trackstick device: %d\n",
2559                                     error);
2560                         input_free_device(dev2);
2561                         goto init_fail;
2562                 }
2563
2564                 priv->dev2 = dev2;
2565         }
2566
2567         priv->psmouse = psmouse;
2568
2569         INIT_DELAYED_WORK(&priv->dev3_register_work,
2570                           alps_register_bare_ps2_mouse);
2571
2572         psmouse->protocol_handler = alps_process_byte;
2573         psmouse->poll = alps_poll;
2574         psmouse->disconnect = alps_disconnect;
2575         psmouse->reconnect = alps_reconnect;
2576         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2577
2578         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2579         psmouse->resync_time = 0;
2580
2581         /* Allow 2 invalid packets without resetting device */
2582         psmouse->resetafter = psmouse->pktsize * 2;
2583
2584         return 0;
2585
2586 init_fail:
2587         psmouse_reset(psmouse);
2588         /*
2589          * Even though we did not allocate psmouse->private we do free
2590          * it here.
2591          */
2592         kfree(psmouse->private);
2593         psmouse->private = NULL;
2594         return error;
2595 }
2596
2597 int alps_detect(struct psmouse *psmouse, bool set_properties)
2598 {
2599         struct alps_data *priv;
2600         int error;
2601
2602         error = alps_identify(psmouse, NULL);
2603         if (error)
2604                 return error;
2605
2606         /*
2607          * Reset the device to make sure it is fully operational:
2608          * on some laptops, like certain Dell Latitudes, we may
2609          * fail to properly detect presence of trackstick if device
2610          * has not been reset.
2611          */
2612         psmouse_reset(psmouse);
2613
2614         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2615         if (!priv)
2616                 return -ENOMEM;
2617
2618         error = alps_identify(psmouse, priv);
2619         if (error) {
2620                 kfree(priv);
2621                 return error;
2622         }
2623
2624         if (set_properties) {
2625                 psmouse->vendor = "ALPS";
2626                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
2627                                 "DualPoint TouchPad" : "GlidePoint";
2628                 psmouse->model = priv->proto_version;
2629         } else {
2630                 /*
2631                  * Destroy alps_data structure we allocated earlier since
2632                  * this was just a "trial run". Otherwise we'll keep it
2633                  * to be used by alps_init() which has to be called if
2634                  * we succeed and set_properties is true.
2635                  */
2636                 kfree(priv);
2637                 psmouse->private = NULL;
2638         }
2639
2640         return 0;
2641 }
2642