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;
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         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1170                 /* Register dev3 mouse if we received PS/2 packet first time */
1171                 if (!IS_ERR(priv->dev3))
1172                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1173                                            0);
1174                 return;
1175         } else {
1176                 dev = priv->dev3;
1177         }
1178
1179         if (report_buttons)
1180                 alps_report_buttons(dev, NULL,
1181                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1182
1183         input_report_rel(dev, REL_X,
1184                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1185         input_report_rel(dev, REL_Y,
1186                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1187
1188         input_sync(dev);
1189 }
1190
1191 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1192 {
1193         struct alps_data *priv = psmouse->private;
1194
1195         if (psmouse->pktcnt < 6)
1196                 return PSMOUSE_GOOD_DATA;
1197
1198         if (psmouse->pktcnt == 6) {
1199                 /*
1200                  * Start a timer to flush the packet if it ends up last
1201                  * 6-byte packet in the stream. Timer needs to fire
1202                  * psmouse core times out itself. 20 ms should be enough
1203                  * to decide if we are getting more data or not.
1204                  */
1205                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1206                 return PSMOUSE_GOOD_DATA;
1207         }
1208
1209         del_timer(&priv->timer);
1210
1211         if (psmouse->packet[6] & 0x80) {
1212
1213                 /*
1214                  * Highest bit is set - that means we either had
1215                  * complete ALPS packet and this is start of the
1216                  * next packet or we got garbage.
1217                  */
1218
1219                 if (((psmouse->packet[3] |
1220                       psmouse->packet[4] |
1221                       psmouse->packet[5]) & 0x80) ||
1222                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1223                         psmouse_dbg(psmouse,
1224                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1225                                     psmouse->packet + 3);
1226                         return PSMOUSE_BAD_DATA;
1227                 }
1228
1229                 priv->process_packet(psmouse);
1230
1231                 /* Continue with the next packet */
1232                 psmouse->packet[0] = psmouse->packet[6];
1233                 psmouse->pktcnt = 1;
1234
1235         } else {
1236
1237                 /*
1238                  * High bit is 0 - that means that we indeed got a PS/2
1239                  * packet in the middle of ALPS packet.
1240                  *
1241                  * There is also possibility that we got 6-byte ALPS
1242                  * packet followed  by 3-byte packet from trackpoint. We
1243                  * can not distinguish between these 2 scenarios but
1244                  * because the latter is unlikely to happen in course of
1245                  * normal operation (user would need to press all
1246                  * buttons on the pad and start moving trackpoint
1247                  * without touching the pad surface) we assume former.
1248                  * Even if we are wrong the wost thing that would happen
1249                  * the cursor would jump but we should not get protocol
1250                  * de-synchronization.
1251                  */
1252
1253                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1254                                             false);
1255
1256                 /*
1257                  * Continue with the standard ALPS protocol handling,
1258                  * but make sure we won't process it as an interleaved
1259                  * packet again, which may happen if all buttons are
1260                  * pressed. To avoid this let's reset the 4th bit which
1261                  * is normally 1.
1262                  */
1263                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1264                 psmouse->pktcnt = 4;
1265         }
1266
1267         return PSMOUSE_GOOD_DATA;
1268 }
1269
1270 static void alps_flush_packet(unsigned long data)
1271 {
1272         struct psmouse *psmouse = (struct psmouse *)data;
1273         struct alps_data *priv = psmouse->private;
1274
1275         serio_pause_rx(psmouse->ps2dev.serio);
1276
1277         if (psmouse->pktcnt == psmouse->pktsize) {
1278
1279                 /*
1280                  * We did not any more data in reasonable amount of time.
1281                  * Validate the last 3 bytes and process as a standard
1282                  * ALPS packet.
1283                  */
1284                 if ((psmouse->packet[3] |
1285                      psmouse->packet[4] |
1286                      psmouse->packet[5]) & 0x80) {
1287                         psmouse_dbg(psmouse,
1288                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1289                                     psmouse->packet + 3);
1290                 } else {
1291                         priv->process_packet(psmouse);
1292                 }
1293                 psmouse->pktcnt = 0;
1294         }
1295
1296         serio_continue_rx(psmouse->ps2dev.serio);
1297 }
1298
1299 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1300 {
1301         struct alps_data *priv = psmouse->private;
1302
1303         /*
1304          * Check if we are dealing with a bare PS/2 packet, presumably from
1305          * a device connected to the external PS/2 port. Because bare PS/2
1306          * protocol does not have enough constant bits to self-synchronize
1307          * properly we only do this if the device is fully synchronized.
1308          */
1309         if (!psmouse->out_of_sync_cnt && (psmouse->packet[0] & 0xc8) == 0x08) {
1310                 if (psmouse->pktcnt == 3) {
1311                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1312                                                     true);
1313                         return PSMOUSE_FULL_PACKET;
1314                 }
1315                 return PSMOUSE_GOOD_DATA;
1316         }
1317
1318         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1319
1320         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1321             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1322                 return alps_handle_interleaved_ps2(psmouse);
1323         }
1324
1325         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1326                 psmouse_dbg(psmouse,
1327                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1328                             psmouse->packet[0], priv->mask0, priv->byte0);
1329                 return PSMOUSE_BAD_DATA;
1330         }
1331
1332         /* Bytes 2 - pktsize should have 0 in the highest bit */
1333         if (priv->proto_version < ALPS_PROTO_V5 &&
1334             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1335             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1336                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1337                             psmouse->pktcnt - 1,
1338                             psmouse->packet[psmouse->pktcnt - 1]);
1339
1340                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1341                     psmouse->pktcnt == psmouse->pktsize) {
1342                         /*
1343                          * Some Dell boxes, such as Latitude E6440 or E7440
1344                          * with closed lid, quite often smash last byte of
1345                          * otherwise valid packet with 0xff. Given that the
1346                          * next packet is very likely to be valid let's
1347                          * report PSMOUSE_FULL_PACKET but not process data,
1348                          * rather than reporting PSMOUSE_BAD_DATA and
1349                          * filling the logs.
1350                          */
1351                         return PSMOUSE_FULL_PACKET;
1352                 }
1353
1354                 return PSMOUSE_BAD_DATA;
1355         }
1356
1357         if (priv->proto_version == ALPS_PROTO_V7 &&
1358             !alps_is_valid_package_v7(psmouse)) {
1359                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1360                             psmouse->pktcnt - 1,
1361                             psmouse->packet[psmouse->pktcnt - 1]);
1362                 return PSMOUSE_BAD_DATA;
1363         }
1364
1365         if (psmouse->pktcnt == psmouse->pktsize) {
1366                 priv->process_packet(psmouse);
1367                 return PSMOUSE_FULL_PACKET;
1368         }
1369
1370         return PSMOUSE_GOOD_DATA;
1371 }
1372
1373 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1374 {
1375         struct ps2dev *ps2dev = &psmouse->ps2dev;
1376         struct alps_data *priv = psmouse->private;
1377         int command;
1378         unsigned char *param;
1379         unsigned char dummy[4];
1380
1381         BUG_ON(nibble > 0xf);
1382
1383         command = priv->nibble_commands[nibble].command;
1384         param = (command & 0x0f00) ?
1385                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1386
1387         if (ps2_command(ps2dev, param, command))
1388                 return -1;
1389
1390         return 0;
1391 }
1392
1393 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1394 {
1395         struct ps2dev *ps2dev = &psmouse->ps2dev;
1396         struct alps_data *priv = psmouse->private;
1397         int i, nibble;
1398
1399         if (ps2_command(ps2dev, NULL, priv->addr_command))
1400                 return -1;
1401
1402         for (i = 12; i >= 0; i -= 4) {
1403                 nibble = (addr >> i) & 0xf;
1404                 if (alps_command_mode_send_nibble(psmouse, nibble))
1405                         return -1;
1406         }
1407
1408         return 0;
1409 }
1410
1411 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1412 {
1413         struct ps2dev *ps2dev = &psmouse->ps2dev;
1414         unsigned char param[4];
1415
1416         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1417                 return -1;
1418
1419         /*
1420          * The address being read is returned in the first two bytes
1421          * of the result. Check that this address matches the expected
1422          * address.
1423          */
1424         if (addr != ((param[0] << 8) | param[1]))
1425                 return -1;
1426
1427         return param[2];
1428 }
1429
1430 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1431 {
1432         if (alps_command_mode_set_addr(psmouse, addr))
1433                 return -1;
1434         return __alps_command_mode_read_reg(psmouse, addr);
1435 }
1436
1437 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1438 {
1439         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1440                 return -1;
1441         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1442                 return -1;
1443         return 0;
1444 }
1445
1446 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1447                                        u8 value)
1448 {
1449         if (alps_command_mode_set_addr(psmouse, addr))
1450                 return -1;
1451         return __alps_command_mode_write_reg(psmouse, value);
1452 }
1453
1454 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1455                         int repeated_command, unsigned char *param)
1456 {
1457         struct ps2dev *ps2dev = &psmouse->ps2dev;
1458
1459         param[0] = 0;
1460         if (init_command && ps2_command(ps2dev, param, init_command))
1461                 return -EIO;
1462
1463         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1464             ps2_command(ps2dev,  NULL, repeated_command) ||
1465             ps2_command(ps2dev,  NULL, repeated_command))
1466                 return -EIO;
1467
1468         param[0] = param[1] = param[2] = 0xff;
1469         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1470                 return -EIO;
1471
1472         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1473                     repeated_command, param);
1474         return 0;
1475 }
1476
1477 static bool alps_check_valid_firmware_id(unsigned char id[])
1478 {
1479         if (id[0] == 0x73)
1480                 return true;
1481
1482         if (id[0] == 0x88 &&
1483             (id[1] == 0x07 ||
1484              id[1] == 0x08 ||
1485              (id[1] & 0xf0) == 0xb0 ||
1486              (id[1] & 0xf0) == 0xc0)) {
1487                 return true;
1488         }
1489
1490         return false;
1491 }
1492
1493 static int alps_enter_command_mode(struct psmouse *psmouse)
1494 {
1495         unsigned char param[4];
1496
1497         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1498                 psmouse_err(psmouse, "failed to enter command mode\n");
1499                 return -1;
1500         }
1501
1502         if (!alps_check_valid_firmware_id(param)) {
1503                 psmouse_dbg(psmouse,
1504                             "unknown response while entering command mode\n");
1505                 return -1;
1506         }
1507         return 0;
1508 }
1509
1510 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1511 {
1512         struct ps2dev *ps2dev = &psmouse->ps2dev;
1513         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1514                 return -1;
1515         return 0;
1516 }
1517
1518 /*
1519  * For DualPoint devices select the device that should respond to
1520  * subsequent commands. It looks like glidepad is behind stickpointer,
1521  * I'd thought it would be other way around...
1522  */
1523 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1524 {
1525         struct ps2dev *ps2dev = &psmouse->ps2dev;
1526         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1527
1528         if (ps2_command(ps2dev, NULL, cmd) ||
1529             ps2_command(ps2dev, NULL, cmd) ||
1530             ps2_command(ps2dev, NULL, cmd) ||
1531             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1532                 return -1;
1533
1534         /* we may get 3 more bytes, just ignore them */
1535         ps2_drain(ps2dev, 3, 100);
1536
1537         return 0;
1538 }
1539
1540 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1541 {
1542         struct ps2dev *ps2dev = &psmouse->ps2dev;
1543
1544         /* Try ALPS magic knock - 4 disable before enable */
1545         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1546             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_ENABLE))
1550                 return -1;
1551
1552         /*
1553          * Switch mouse to poll (remote) mode so motion data will not
1554          * get in our way
1555          */
1556         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1557 }
1558
1559 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1560 {
1561         int i, nibble;
1562
1563         /*
1564          * b0-b11 are valid bits, send sequence is inverse.
1565          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1566          */
1567         for (i = 0; i <= 8; i += 4) {
1568                 nibble = (word >> i) & 0xf;
1569                 if (alps_command_mode_send_nibble(psmouse, nibble))
1570                         return -1;
1571         }
1572
1573         return 0;
1574 }
1575
1576 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1577                                        u16 addr, u16 value)
1578 {
1579         struct ps2dev *ps2dev = &psmouse->ps2dev;
1580
1581         /* 0x0A0 is the command to write the word */
1582         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1583             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1584             alps_monitor_mode_send_word(psmouse, addr) ||
1585             alps_monitor_mode_send_word(psmouse, value) ||
1586             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1587                 return -1;
1588
1589         return 0;
1590 }
1591
1592 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1593 {
1594         struct ps2dev *ps2dev = &psmouse->ps2dev;
1595
1596         if (enable) {
1597                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1598                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1599                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1600                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1601                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1602                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1603                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1604                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1605                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1606                         return -1;
1607         } else {
1608                 /* EC to exit monitor mode */
1609                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1610                         return -1;
1611         }
1612
1613         return 0;
1614 }
1615
1616 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1617 {
1618         u16 reg_val = 0x181;
1619         int ret = -1;
1620
1621         /* enter monitor mode, to write the register */
1622         if (alps_monitor_mode(psmouse, true))
1623                 return -1;
1624
1625         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1626
1627         if (alps_monitor_mode(psmouse, false))
1628                 ret = -1;
1629
1630         return ret;
1631 }
1632
1633 static int alps_get_status(struct psmouse *psmouse, char *param)
1634 {
1635         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1636         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1637                 return -1;
1638
1639         return 0;
1640 }
1641
1642 /*
1643  * Turn touchpad tapping on or off. The sequences are:
1644  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1645  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1646  * My guess that 0xE9 (GetInfo) is here as a sync point.
1647  * For models that also have stickpointer (DualPoints) its tapping
1648  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1649  * we don't fiddle with it.
1650  */
1651 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1652 {
1653         struct ps2dev *ps2dev = &psmouse->ps2dev;
1654         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1655         unsigned char tap_arg = enable ? 0x0A : 0x00;
1656         unsigned char param[4];
1657
1658         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1659             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1660             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1661             ps2_command(ps2dev, &tap_arg, cmd))
1662                 return -1;
1663
1664         if (alps_get_status(psmouse, param))
1665                 return -1;
1666
1667         return 0;
1668 }
1669
1670 /*
1671  * alps_poll() - poll the touchpad for current motion packet.
1672  * Used in resync.
1673  */
1674 static int alps_poll(struct psmouse *psmouse)
1675 {
1676         struct alps_data *priv = psmouse->private;
1677         unsigned char buf[sizeof(psmouse->packet)];
1678         bool poll_failed;
1679
1680         if (priv->flags & ALPS_PASS)
1681                 alps_passthrough_mode_v2(psmouse, true);
1682
1683         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1684                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1685
1686         if (priv->flags & ALPS_PASS)
1687                 alps_passthrough_mode_v2(psmouse, false);
1688
1689         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1690                 return -1;
1691
1692         if ((psmouse->badbyte & 0xc8) == 0x08) {
1693 /*
1694  * Poll the track stick ...
1695  */
1696                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1697                         return -1;
1698         }
1699
1700         memcpy(psmouse->packet, buf, sizeof(buf));
1701         return 0;
1702 }
1703
1704 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1705 {
1706         struct alps_data *priv = psmouse->private;
1707
1708         if ((priv->flags & ALPS_PASS) &&
1709             alps_passthrough_mode_v2(psmouse, true)) {
1710                 return -1;
1711         }
1712
1713         if (alps_tap_mode(psmouse, true)) {
1714                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1715                 return -1;
1716         }
1717
1718         if (alps_absolute_mode_v1_v2(psmouse)) {
1719                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1720                 return -1;
1721         }
1722
1723         if ((priv->flags & ALPS_PASS) &&
1724             alps_passthrough_mode_v2(psmouse, false)) {
1725                 return -1;
1726         }
1727
1728         /* ALPS needs stream mode, otherwise it won't report any data */
1729         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1730                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1731                 return -1;
1732         }
1733
1734         return 0;
1735 }
1736
1737 static int alps_hw_init_v6(struct psmouse *psmouse)
1738 {
1739         unsigned char param[2] = {0xC8, 0x14};
1740
1741         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1742         if (alps_passthrough_mode_v2(psmouse, true))
1743                 return -1;
1744
1745         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1746             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1747             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1748             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1749             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1750                 return -1;
1751
1752         if (alps_passthrough_mode_v2(psmouse, false))
1753                 return -1;
1754
1755         if (alps_absolute_mode_v6(psmouse)) {
1756                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1757                 return -1;
1758         }
1759
1760         return 0;
1761 }
1762
1763 /*
1764  * Enable or disable passthrough mode to the trackstick.
1765  */
1766 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1767                                     int reg_base, bool enable)
1768 {
1769         int reg_val, ret = -1;
1770
1771         if (alps_enter_command_mode(psmouse))
1772                 return -1;
1773
1774         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1775         if (reg_val == -1)
1776                 goto error;
1777
1778         if (enable)
1779                 reg_val |= 0x01;
1780         else
1781                 reg_val &= ~0x01;
1782
1783         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1784
1785 error:
1786         if (alps_exit_command_mode(psmouse))
1787                 ret = -1;
1788         return ret;
1789 }
1790
1791 /* Must be in command mode when calling this function */
1792 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1793 {
1794         int reg_val;
1795
1796         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1797         if (reg_val == -1)
1798                 return -1;
1799
1800         reg_val |= 0x06;
1801         if (__alps_command_mode_write_reg(psmouse, reg_val))
1802                 return -1;
1803
1804         return 0;
1805 }
1806
1807 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
1808 {
1809         int ret = -EIO, reg_val;
1810
1811         if (alps_enter_command_mode(psmouse))
1812                 goto error;
1813
1814         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
1815         if (reg_val == -1)
1816                 goto error;
1817
1818         /* bit 7: trackstick is present */
1819         ret = reg_val & 0x80 ? 0 : -ENODEV;
1820
1821 error:
1822         alps_exit_command_mode(psmouse);
1823         return ret;
1824 }
1825
1826 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
1827 {
1828         struct ps2dev *ps2dev = &psmouse->ps2dev;
1829         int ret = 0;
1830         unsigned char param[4];
1831
1832         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
1833                 return -EIO;
1834
1835         /*
1836          * E7 report for the trackstick
1837          *
1838          * There have been reports of failures to seem to trace back
1839          * to the above trackstick check failing. When these occur
1840          * this E7 report fails, so when that happens we continue
1841          * with the assumption that there isn't a trackstick after
1842          * all.
1843          */
1844         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
1845                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
1846                 ret = -ENODEV;
1847         } else {
1848                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
1849
1850                 /*
1851                  * Not sure what this does, but it is absolutely
1852                  * essential. Without it, the touchpad does not
1853                  * work at all and the trackstick just emits normal
1854                  * PS/2 packets.
1855                  */
1856                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1857                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1858                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1859                     alps_command_mode_send_nibble(psmouse, 0x9) ||
1860                     alps_command_mode_send_nibble(psmouse, 0x4)) {
1861                         psmouse_err(psmouse,
1862                                     "Error sending magic E6 sequence\n");
1863                         ret = -EIO;
1864                         goto error;
1865                 }
1866
1867                 /*
1868                  * This ensures the trackstick packets are in the format
1869                  * supported by this driver. If bit 1 isn't set the packet
1870                  * format is different.
1871                  */
1872                 if (alps_enter_command_mode(psmouse) ||
1873                     alps_command_mode_write_reg(psmouse,
1874                                                 reg_base + 0x08, 0x82) ||
1875                     alps_exit_command_mode(psmouse))
1876                         ret = -EIO;
1877         }
1878
1879 error:
1880         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
1881                 ret = -EIO;
1882
1883         return ret;
1884 }
1885
1886 static int alps_hw_init_v3(struct psmouse *psmouse)
1887 {
1888         struct ps2dev *ps2dev = &psmouse->ps2dev;
1889         int reg_val;
1890         unsigned char param[4];
1891
1892         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
1893         if (reg_val == -EIO)
1894                 goto error;
1895
1896         if (reg_val == 0 &&
1897             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
1898                 goto error;
1899
1900         if (alps_enter_command_mode(psmouse) ||
1901             alps_absolute_mode_v3(psmouse)) {
1902                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1903                 goto error;
1904         }
1905
1906         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1907         if (reg_val == -1)
1908                 goto error;
1909         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1910                 goto error;
1911
1912         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1913         if (reg_val == -1)
1914                 goto error;
1915         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1916                 goto error;
1917
1918         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1919                 goto error;
1920         if (__alps_command_mode_write_reg(psmouse, 0x04))
1921                 goto error;
1922
1923         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1924                 goto error;
1925         if (__alps_command_mode_write_reg(psmouse, 0x03))
1926                 goto error;
1927
1928         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1929                 goto error;
1930         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1931                 goto error;
1932
1933         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1934                 goto error;
1935         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1936                 goto error;
1937
1938         alps_exit_command_mode(psmouse);
1939
1940         /* Set rate and enable data reporting */
1941         param[0] = 0x64;
1942         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1943             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1944                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1945                 return -1;
1946         }
1947
1948         return 0;
1949
1950 error:
1951         /*
1952          * Leaving the touchpad in command mode will essentially render
1953          * it unusable until the machine reboots, so exit it here just
1954          * to be safe
1955          */
1956         alps_exit_command_mode(psmouse);
1957         return -1;
1958 }
1959
1960 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
1961 {
1962         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
1963         struct alps_data *priv = psmouse->private;
1964
1965         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
1966         if (reg < 0)
1967                 return reg;
1968
1969         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1970         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
1971
1972         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
1973         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
1974
1975         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
1976         if (reg < 0)
1977                 return reg;
1978
1979         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1980         x_electrode = 17 + x_electrode;
1981
1982         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
1983         y_electrode = 13 + y_electrode;
1984
1985         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
1986         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
1987
1988         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
1989         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
1990
1991         psmouse_dbg(psmouse,
1992                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
1993                     x_pitch, y_pitch, x_electrode, y_electrode,
1994                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
1995
1996         return 0;
1997 }
1998
1999 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2000 {
2001         struct alps_data *priv = psmouse->private;
2002         struct ps2dev *ps2dev = &psmouse->ps2dev;
2003         int reg_val, ret = -1;
2004
2005         if (priv->flags & ALPS_DUALPOINT) {
2006                 reg_val = alps_setup_trackstick_v3(psmouse,
2007                                                    ALPS_REG_BASE_RUSHMORE);
2008                 if (reg_val == -EIO)
2009                         goto error;
2010         }
2011
2012         if (alps_enter_command_mode(psmouse) ||
2013             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2014             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2015                 goto error;
2016
2017         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2018                 goto error;
2019
2020         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2021         if (reg_val == -1)
2022                 goto error;
2023         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2024                 goto error;
2025
2026         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2027                 goto error;
2028
2029         /* enter absolute mode */
2030         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2031         if (reg_val == -1)
2032                 goto error;
2033         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2034                 goto error;
2035
2036         alps_exit_command_mode(psmouse);
2037         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2038
2039 error:
2040         alps_exit_command_mode(psmouse);
2041         return ret;
2042 }
2043
2044 /* Must be in command mode when calling this function */
2045 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2046 {
2047         int reg_val;
2048
2049         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2050         if (reg_val == -1)
2051                 return -1;
2052
2053         reg_val |= 0x02;
2054         if (__alps_command_mode_write_reg(psmouse, reg_val))
2055                 return -1;
2056
2057         return 0;
2058 }
2059
2060 static int alps_hw_init_v4(struct psmouse *psmouse)
2061 {
2062         struct ps2dev *ps2dev = &psmouse->ps2dev;
2063         unsigned char param[4];
2064
2065         if (alps_enter_command_mode(psmouse))
2066                 goto error;
2067
2068         if (alps_absolute_mode_v4(psmouse)) {
2069                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2070                 goto error;
2071         }
2072
2073         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2074                 goto error;
2075
2076         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2077                 goto error;
2078
2079         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2080                 goto error;
2081
2082         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2083                 goto error;
2084
2085         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2086                 goto error;
2087
2088         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2089                 goto error;
2090
2091         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2092                 goto error;
2093
2094         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2095                 goto error;
2096
2097         alps_exit_command_mode(psmouse);
2098
2099         /*
2100          * This sequence changes the output from a 9-byte to an
2101          * 8-byte format. All the same data seems to be present,
2102          * just in a more compact format.
2103          */
2104         param[0] = 0xc8;
2105         param[1] = 0x64;
2106         param[2] = 0x50;
2107         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2108             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2109             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2110             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2111                 return -1;
2112
2113         /* Set rate and enable data reporting */
2114         param[0] = 0x64;
2115         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2116             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2117                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2118                 return -1;
2119         }
2120
2121         return 0;
2122
2123 error:
2124         /*
2125          * Leaving the touchpad in command mode will essentially render
2126          * it unusable until the machine reboots, so exit it here just
2127          * to be safe
2128          */
2129         alps_exit_command_mode(psmouse);
2130         return -1;
2131 }
2132
2133 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2134                                         struct alps_data *priv)
2135 {
2136         struct ps2dev *ps2dev = &psmouse->ps2dev;
2137         unsigned char param[4] = {0};
2138         int num_x_electrode, num_y_electrode;
2139
2140         if (alps_enter_command_mode(psmouse))
2141                 return -1;
2142
2143         param[0] = 0x0a;
2144         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2145             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2146             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2147             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2148             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2149                 return -1;
2150
2151         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2152                 return -1;
2153
2154         /*
2155          * Dolphin's sensor line number is not fixed. It can be calculated
2156          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2157          * Further more, we can get device's x_max and y_max by multiplying
2158          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2159          *
2160          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2161          *      real sensor line number X = 11 + 8 = 19, and
2162          *      real sensor line number Y = 8 + 1 = 9.
2163          *      So, x_max = (19 - 1) * 64 = 1152, and
2164          *          y_max = (9 - 1) * 64 = 512.
2165          */
2166         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2167         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2168         priv->x_bits = num_x_electrode;
2169         priv->y_bits = num_y_electrode;
2170         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2171         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2172
2173         if (alps_exit_command_mode(psmouse))
2174                 return -1;
2175
2176         return 0;
2177 }
2178
2179 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2180 {
2181         struct ps2dev *ps2dev = &psmouse->ps2dev;
2182         unsigned char param[2];
2183
2184         /* This is dolphin "v1" as empirically defined by florin9doi */
2185         param[0] = 0x64;
2186         param[1] = 0x28;
2187
2188         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2189             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2190             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2191                 return -1;
2192
2193         return 0;
2194 }
2195
2196 static int alps_hw_init_v7(struct psmouse *psmouse)
2197 {
2198         struct ps2dev *ps2dev = &psmouse->ps2dev;
2199         int reg_val, ret = -1;
2200
2201         if (alps_enter_command_mode(psmouse) ||
2202             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2203                 goto error;
2204
2205         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2206                 goto error;
2207
2208         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2209                 goto error;
2210
2211         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2212         if (reg_val == -1)
2213                 goto error;
2214         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2215                 goto error;
2216
2217         alps_exit_command_mode(psmouse);
2218         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2219
2220 error:
2221         alps_exit_command_mode(psmouse);
2222         return ret;
2223 }
2224
2225 static int alps_set_protocol(struct psmouse *psmouse,
2226                              struct alps_data *priv,
2227                              const struct alps_protocol_info *protocol)
2228 {
2229         psmouse->private = priv;
2230
2231         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2232
2233         priv->proto_version = protocol->version;
2234         priv->byte0 = protocol->byte0;
2235         priv->mask0 = protocol->mask0;
2236         priv->flags = protocol->flags;
2237
2238         priv->x_max = 2000;
2239         priv->y_max = 1400;
2240         priv->x_bits = 15;
2241         priv->y_bits = 11;
2242
2243         switch (priv->proto_version) {
2244         case ALPS_PROTO_V1:
2245         case ALPS_PROTO_V2:
2246                 priv->hw_init = alps_hw_init_v1_v2;
2247                 priv->process_packet = alps_process_packet_v1_v2;
2248                 priv->set_abs_params = alps_set_abs_params_st;
2249                 priv->x_max = 1023;
2250                 priv->y_max = 767;
2251                 break;
2252
2253         case ALPS_PROTO_V3:
2254                 priv->hw_init = alps_hw_init_v3;
2255                 priv->process_packet = alps_process_packet_v3;
2256                 priv->set_abs_params = alps_set_abs_params_mt;
2257                 priv->decode_fields = alps_decode_pinnacle;
2258                 priv->nibble_commands = alps_v3_nibble_commands;
2259                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2260                 break;
2261
2262         case ALPS_PROTO_V3_RUSHMORE:
2263                 priv->hw_init = alps_hw_init_rushmore_v3;
2264                 priv->process_packet = alps_process_packet_v3;
2265                 priv->set_abs_params = alps_set_abs_params_mt;
2266                 priv->decode_fields = alps_decode_rushmore;
2267                 priv->nibble_commands = alps_v3_nibble_commands;
2268                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2269                 priv->x_bits = 16;
2270                 priv->y_bits = 12;
2271
2272                 if (alps_probe_trackstick_v3(psmouse,
2273                                              ALPS_REG_BASE_RUSHMORE) < 0)
2274                         priv->flags &= ~ALPS_DUALPOINT;
2275
2276                 break;
2277
2278         case ALPS_PROTO_V4:
2279                 priv->hw_init = alps_hw_init_v4;
2280                 priv->process_packet = alps_process_packet_v4;
2281                 priv->set_abs_params = alps_set_abs_params_mt;
2282                 priv->nibble_commands = alps_v4_nibble_commands;
2283                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2284                 break;
2285
2286         case ALPS_PROTO_V5:
2287                 priv->hw_init = alps_hw_init_dolphin_v1;
2288                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2289                 priv->decode_fields = alps_decode_dolphin;
2290                 priv->set_abs_params = alps_set_abs_params_mt;
2291                 priv->nibble_commands = alps_v3_nibble_commands;
2292                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2293                 priv->x_bits = 23;
2294                 priv->y_bits = 12;
2295
2296                 if (alps_dolphin_get_device_area(psmouse, priv))
2297                         return -EIO;
2298
2299                 break;
2300
2301         case ALPS_PROTO_V6:
2302                 priv->hw_init = alps_hw_init_v6;
2303                 priv->process_packet = alps_process_packet_v6;
2304                 priv->set_abs_params = alps_set_abs_params_st;
2305                 priv->nibble_commands = alps_v6_nibble_commands;
2306                 priv->x_max = 2047;
2307                 priv->y_max = 1535;
2308                 break;
2309
2310         case ALPS_PROTO_V7:
2311                 priv->hw_init = alps_hw_init_v7;
2312                 priv->process_packet = alps_process_packet_v7;
2313                 priv->decode_fields = alps_decode_packet_v7;
2314                 priv->set_abs_params = alps_set_abs_params_mt;
2315                 priv->nibble_commands = alps_v3_nibble_commands;
2316                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2317                 priv->x_max = 0xfff;
2318                 priv->y_max = 0x7ff;
2319
2320                 if (priv->fw_ver[1] != 0xba)
2321                         priv->flags |= ALPS_BUTTONPAD;
2322
2323                 break;
2324         }
2325
2326         return 0;
2327 }
2328
2329 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2330                                                          unsigned char *ec)
2331 {
2332         const struct alps_model_info *model;
2333         int i;
2334
2335         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2336                 model = &alps_model_data[i];
2337
2338                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2339                     (!model->command_mode_resp ||
2340                      model->command_mode_resp == ec[2])) {
2341
2342                         return &model->protocol_info;
2343                 }
2344         }
2345
2346         return NULL;
2347 }
2348
2349 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2350 {
2351         const struct alps_protocol_info *protocol;
2352         unsigned char e6[4], e7[4], ec[4];
2353         int error;
2354
2355         /*
2356          * First try "E6 report".
2357          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2358          * The bits 0-2 of the first byte will be 1s if some buttons are
2359          * pressed.
2360          */
2361         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2362                          PSMOUSE_CMD_SETSCALE11, e6))
2363                 return -EIO;
2364
2365         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2366                 return -EINVAL;
2367
2368         /*
2369          * Now get the "E7" and "EC" reports.  These will uniquely identify
2370          * most ALPS touchpads.
2371          */
2372         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2373                          PSMOUSE_CMD_SETSCALE21, e7) ||
2374             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2375                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2376             alps_exit_command_mode(psmouse))
2377                 return -EIO;
2378
2379         protocol = alps_match_table(e7, ec);
2380         if (!protocol) {
2381                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2382                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2383                         protocol = &alps_v5_protocol_data;
2384                 } else if (ec[0] == 0x88 &&
2385                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2386                         protocol = &alps_v7_protocol_data;
2387                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2388                         protocol = &alps_v3_rushmore_data;
2389                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2390                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2391                         protocol = &alps_v3_protocol_data;
2392                 } else {
2393                         psmouse_dbg(psmouse,
2394                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2395                         return -EINVAL;
2396                 }
2397         }
2398
2399         if (priv) {
2400                 /* Save the Firmware version */
2401                 memcpy(priv->fw_ver, ec, 3);
2402                 error = alps_set_protocol(psmouse, priv, protocol);
2403                 if (error)
2404                         return error;
2405         }
2406
2407         return 0;
2408 }
2409
2410 static int alps_reconnect(struct psmouse *psmouse)
2411 {
2412         struct alps_data *priv = psmouse->private;
2413
2414         psmouse_reset(psmouse);
2415
2416         if (alps_identify(psmouse, priv) < 0)
2417                 return -1;
2418
2419         return priv->hw_init(psmouse);
2420 }
2421
2422 static void alps_disconnect(struct psmouse *psmouse)
2423 {
2424         struct alps_data *priv = psmouse->private;
2425
2426         psmouse_reset(psmouse);
2427         del_timer_sync(&priv->timer);
2428         if (priv->dev2)
2429                 input_unregister_device(priv->dev2);
2430         if (!IS_ERR_OR_NULL(priv->dev3))
2431                 input_unregister_device(priv->dev3);
2432         kfree(priv);
2433 }
2434
2435 static void alps_set_abs_params_st(struct alps_data *priv,
2436                                    struct input_dev *dev1)
2437 {
2438         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2439         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2440 }
2441
2442 static void alps_set_abs_params_mt(struct alps_data *priv,
2443                                    struct input_dev *dev1)
2444 {
2445         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2446         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2447
2448         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2449         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2450
2451         input_mt_init_slots(dev1, MAX_TOUCHES, INPUT_MT_POINTER |
2452                 INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2453
2454         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2455         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2456
2457         /* V7 is real multi-touch */
2458         if (priv->proto_version == ALPS_PROTO_V7)
2459                 clear_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
2460 }
2461
2462 int alps_init(struct psmouse *psmouse)
2463 {
2464         struct alps_data *priv = psmouse->private;
2465         struct input_dev *dev1 = psmouse->dev;
2466         int error;
2467
2468         error = priv->hw_init(psmouse);
2469         if (error)
2470                 goto init_fail;
2471
2472         /*
2473          * Undo part of setup done for us by psmouse core since touchpad
2474          * is not a relative device.
2475          */
2476         __clear_bit(EV_REL, dev1->evbit);
2477         __clear_bit(REL_X, dev1->relbit);
2478         __clear_bit(REL_Y, dev1->relbit);
2479
2480         /*
2481          * Now set up our capabilities.
2482          */
2483         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2484         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2485         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2486         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2487                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2488
2489         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2490
2491         priv->set_abs_params(priv, dev1);
2492         /* No pressure on V7 */
2493         if (priv->proto_version != ALPS_PROTO_V7)
2494                 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2495
2496         if (priv->flags & ALPS_WHEEL) {
2497                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2498                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2499         }
2500
2501         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2502                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2503                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2504         }
2505
2506         if (priv->flags & ALPS_FOUR_BUTTONS) {
2507                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2508                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2509                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2510                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2511         } else if (priv->flags & ALPS_BUTTONPAD) {
2512                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2513                 clear_bit(BTN_RIGHT, dev1->keybit);
2514         } else {
2515                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2516         }
2517
2518         if (priv->flags & ALPS_DUALPOINT) {
2519                 struct input_dev *dev2;
2520
2521                 dev2 = input_allocate_device();
2522                 if (!dev2) {
2523                         psmouse_err(psmouse,
2524                                     "failed to allocate trackstick device\n");
2525                         error = -ENOMEM;
2526                         goto init_fail;
2527                 }
2528
2529                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2530                          psmouse->ps2dev.serio->phys);
2531                 dev2->phys = priv->phys2;
2532
2533                 /*
2534                  * format of input device name is: "protocol vendor name"
2535                  * see function psmouse_switch_protocol() in psmouse-base.c
2536                  */
2537                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2538
2539                 dev2->id.bustype = BUS_I8042;
2540                 dev2->id.vendor  = 0x0002;
2541                 dev2->id.product = PSMOUSE_ALPS;
2542                 dev2->id.version = priv->proto_version;
2543                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2544
2545                 input_set_capability(dev2, EV_REL, REL_X);
2546                 input_set_capability(dev2, EV_REL, REL_Y);
2547                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2548                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2549                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2550
2551                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2552                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2553
2554                 error = input_register_device(dev2);
2555                 if (error) {
2556                         psmouse_err(psmouse,
2557                                     "failed to register trackstick device: %d\n",
2558                                     error);
2559                         input_free_device(dev2);
2560                         goto init_fail;
2561                 }
2562
2563                 priv->dev2 = dev2;
2564         }
2565
2566         priv->psmouse = psmouse;
2567
2568         INIT_DELAYED_WORK(&priv->dev3_register_work,
2569                           alps_register_bare_ps2_mouse);
2570
2571         psmouse->protocol_handler = alps_process_byte;
2572         psmouse->poll = alps_poll;
2573         psmouse->disconnect = alps_disconnect;
2574         psmouse->reconnect = alps_reconnect;
2575         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2576
2577         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2578         psmouse->resync_time = 0;
2579
2580         /* Allow 2 invalid packets without resetting device */
2581         psmouse->resetafter = psmouse->pktsize * 2;
2582
2583         return 0;
2584
2585 init_fail:
2586         psmouse_reset(psmouse);
2587         /*
2588          * Even though we did not allocate psmouse->private we do free
2589          * it here.
2590          */
2591         kfree(psmouse->private);
2592         psmouse->private = NULL;
2593         return error;
2594 }
2595
2596 int alps_detect(struct psmouse *psmouse, bool set_properties)
2597 {
2598         struct alps_data *priv;
2599         int error;
2600
2601         error = alps_identify(psmouse, NULL);
2602         if (error)
2603                 return error;
2604
2605         /*
2606          * Reset the device to make sure it is fully operational:
2607          * on some laptops, like certain Dell Latitudes, we may
2608          * fail to properly detect presence of trackstick if device
2609          * has not been reset.
2610          */
2611         psmouse_reset(psmouse);
2612
2613         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2614         if (!priv)
2615                 return -ENOMEM;
2616
2617         error = alps_identify(psmouse, priv);
2618         if (error) {
2619                 kfree(priv);
2620                 return error;
2621         }
2622
2623         if (set_properties) {
2624                 psmouse->vendor = "ALPS";
2625                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
2626                                 "DualPoint TouchPad" : "GlidePoint";
2627                 psmouse->model = priv->proto_version;
2628         } else {
2629                 /*
2630                  * Destroy alps_data structure we allocated earlier since
2631                  * this was just a "trial run". Otherwise we'll keep it
2632                  * to be used by alps_init() which has to be called if
2633                  * we succeed and set_properties is true.
2634                  */
2635                 kfree(priv);
2636                 psmouse->private = NULL;
2637         }
2638
2639         return 0;
2640 }
2641