drivers/input/mouse/alps.c

   1 /*
   2  * ALPS touchpad PS/2 mouse driver
   3  *
   4  * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
   5  * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
   6  * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
   7  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
   8  * Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net>
   9  *
  10  * ALPS detection, tap switching and status querying info is taken from
  11  * tpconfig utility (by C. Scott Ananian and Bruce Kall).
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU General Public License version 2 as published by
  15  * the Free Software Foundation.
  16  */
  17
  18 #include <linux/slab.h>
  19 #include <linux/input.h>
  20 #include <linux/input/mt.h>
  21 #include <linux/serio.h>
  22 #include <linux/libps2.h>
  23
  24 #include "psmouse.h"
  25 #include "alps.h"
  26
  27 /*
  28  * Definitions for ALPS version 3 and 4 command mode protocol
  29  */
  30 #define ALPS_CMD_NIBBLE_10      0x01f2
  31
  32 #define ALPS_REG_BASE_RUSHMORE  0xc2c0
  33 #define ALPS_REG_BASE_PINNACLE  0x0000
  34
  35 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
  36         { PSMOUSE_CMD_SETPOLL,          0x00 }, /* 0 */
  37         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
  38         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
  39         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
  40         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
  41         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
  42         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
  43         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
  44         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
  45         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
  46         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
  47         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
  48         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
  49         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
  50         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
  51         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  52 };
  53
  54 static const struct alps_nibble_commands alps_v4_nibble_commands[] = {
  55         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
  56         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
  57         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
  58         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
  59         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
  60         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
  61         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
  62         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
  63         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
  64         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
  65         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
  66         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
  67         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
  68         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
  69         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
  70         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  71 };
  72
  73 static const struct alps_nibble_commands alps_v6_nibble_commands[] = {
  74         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
  75         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 1 */
  76         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 2 */
  77         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 3 */
  78         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 4 */
  79         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 5 */
  80         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 6 */
  81         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 7 */
  82         { PSMOUSE_CMD_GETID,            0x00 }, /* 8 */
  83         { PSMOUSE_CMD_GETINFO,          0x00 }, /* 9 */
  84         { PSMOUSE_CMD_SETRES,           0x00 }, /* a */
  85         { PSMOUSE_CMD_SETRES,           0x01 }, /* b */
  86         { PSMOUSE_CMD_SETRES,           0x02 }, /* c */
  87         { PSMOUSE_CMD_SETRES,           0x03 }, /* d */
  88         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* e */
  89         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  90 };
  91
  92
  93 #define ALPS_DUALPOINT          0x02    /* touchpad has trackstick */
  94 #define ALPS_PASS               0x04    /* device has a pass-through port */
  95
  96 #define ALPS_WHEEL              0x08    /* hardware wheel present */
  97 #define ALPS_FW_BK_1            0x10    /* front & back buttons present */
  98 #define ALPS_FW_BK_2            0x20    /* front & back buttons present */
  99 #define ALPS_FOUR_BUTTONS       0x40    /* 4 direction button present */
 100 #define ALPS_PS2_INTERLEAVED    0x80    /* 3-byte PS/2 packet interleaved with
 101                                            6-byte ALPS packet */
 102 #define ALPS_BUTTONPAD          0x200   /* device is a clickpad */
 103
 104 static const struct alps_model_info alps_model_data[] = {
 105         { { 0x32, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Toshiba Salellite Pro M10 */
 106         { { 0x33, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } },                               /* UMAX-530T */
 107         { { 0x53, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 108         { { 0x53, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 109         { { 0x60, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },                               /* HP ze1115 */
 110         { { 0x63, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 111         { { 0x63, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 112         { { 0x63, 0x02, 0x28 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Fujitsu Siemens S6010 */
 113         { { 0x63, 0x02, 0x3c }, 0x00, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } },              /* Toshiba Satellite S2400-103 */
 114         { { 0x63, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } },            /* NEC Versa L320 */
 115         { { 0x63, 0x02, 0x64 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 116         { { 0x63, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D800 */
 117         { { 0x73, 0x00, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } },          /* ThinkPad R61 8918-5QG */
 118         { { 0x73, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 119         { { 0x73, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Ahtec Laptop */
 120
 121         /*
 122          * XXX This entry is suspicious. First byte has zero lower nibble,
 123          * which is what a normal mouse would report. Also, the value 0x0e
 124          * isn't valid per PS/2 spec.
 125          */
 126         { { 0x20, 0x02, 0x0e }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 127
 128         { { 0x22, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 129         { { 0x22, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D600 */
 130         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
 131         { { 0x62, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf,
 132                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },
 133         { { 0x73, 0x00, 0x14 }, 0x00, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } },          /* Dell XT2 */
 134         { { 0x73, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } },       /* Dell Vostro 1400 */
 135         { { 0x52, 0x01, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff,
 136                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },                          /* Toshiba Tecra A11-11L */
 137         { { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } },
 138 };
 139
 140 static const struct alps_protocol_info alps_v3_protocol_data = {
 141         ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT
 142 };
 143
 144 static const struct alps_protocol_info alps_v3_rushmore_data = {
 145         ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT
 146 };
 147
 148 static const struct alps_protocol_info alps_v5_protocol_data = {
 149         ALPS_PROTO_V5, 0xc8, 0xd8, 0
 150 };
 151
 152 static const struct alps_protocol_info alps_v7_protocol_data = {
 153         ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
 154 };
 155
 156 static const struct alps_protocol_info alps_v8_protocol_data = {
 157         ALPS_PROTO_V8, 0x18, 0x18, 0
 158 };
 159
 160 static void alps_set_abs_params_st(struct alps_data *priv,
 161                                    struct input_dev *dev1);
 162 static void alps_set_abs_params_mt(struct alps_data *priv,
 163                                    struct input_dev *dev1);
 164 static void alps_set_abs_params_v7(struct alps_data *priv,
 165                                    struct input_dev *dev1);
 166 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
 167                                        struct input_dev *dev1);
 168
 169 /* Packet formats are described in Documentation/input/alps.txt */
 170
 171 static bool alps_is_valid_first_byte(struct alps_data *priv,
 172                                      unsigned char data)
 173 {
 174         return (data & priv->mask0) == priv->byte0;
 175 }
 176
 177 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
 178                                 int left, int right, int middle)
 179 {
 180         struct input_dev *dev;
 181
 182         /*
 183          * If shared button has already been reported on the
 184          * other device (dev2) then this event should be also
 185          * sent through that device.
 186          */
 187         dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
 188         input_report_key(dev, BTN_LEFT, left);
 189
 190         dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
 191         input_report_key(dev, BTN_RIGHT, right);
 192
 193         dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
 194         input_report_key(dev, BTN_MIDDLE, middle);
 195
 196         /*
 197          * Sync the _other_ device now, we'll do the first
 198          * device later once we report the rest of the events.
 199          */
 200         if (dev2)
 201                 input_sync(dev2);
 202 }
 203
 204 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
 205 {
 206         struct alps_data *priv = psmouse->private;
 207         unsigned char *packet = psmouse->packet;
 208         struct input_dev *dev = psmouse->dev;
 209         struct input_dev *dev2 = priv->dev2;
 210         int x, y, z, ges, fin, left, right, middle;
 211         int back = 0, forward = 0;
 212
 213         if (priv->proto_version == ALPS_PROTO_V1) {
 214                 left = packet[2] & 0x10;
 215                 right = packet[2] & 0x08;
 216                 middle = 0;
 217                 x = packet[1] | ((packet[0] & 0x07) << 7);
 218                 y = packet[4] | ((packet[3] & 0x07) << 7);
 219                 z = packet[5];
 220         } else {
 221                 left = packet[3] & 1;
 222                 right = packet[3] & 2;
 223                 middle = packet[3] & 4;
 224                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 225                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 226                 z = packet[5];
 227         }
 228
 229         if (priv->flags & ALPS_FW_BK_1) {
 230                 back = packet[0] & 0x10;
 231                 forward = packet[2] & 4;
 232         }
 233
 234         if (priv->flags & ALPS_FW_BK_2) {
 235                 back = packet[3] & 4;
 236                 forward = packet[2] & 4;
 237                 if ((middle = forward && back))
 238                         forward = back = 0;
 239         }
 240
 241         ges = packet[2] & 1;
 242         fin = packet[2] & 2;
 243
 244         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
 245                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 246                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 247
 248                 alps_report_buttons(dev2, dev, left, right, middle);
 249
 250                 input_sync(dev2);
 251                 return;
 252         }
 253
 254         alps_report_buttons(dev, dev2, left, right, middle);
 255
 256         /* Convert hardware tap to a reasonable Z value */
 257         if (ges && !fin)
 258                 z = 40;
 259
 260         /*
 261          * A "tap and drag" operation is reported by the hardware as a transition
 262          * from (!fin && ges) to (fin && ges). This should be translated to the
 263          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 264          */
 265         if (ges && fin && !priv->prev_fin) {
 266                 input_report_abs(dev, ABS_X, x);
 267                 input_report_abs(dev, ABS_Y, y);
 268                 input_report_abs(dev, ABS_PRESSURE, 0);
 269                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 270                 input_sync(dev);
 271         }
 272         priv->prev_fin = fin;
 273
 274         if (z > 30)
 275                 input_report_key(dev, BTN_TOUCH, 1);
 276         if (z < 25)
 277                 input_report_key(dev, BTN_TOUCH, 0);
 278
 279         if (z > 0) {
 280                 input_report_abs(dev, ABS_X, x);
 281                 input_report_abs(dev, ABS_Y, y);
 282         }
 283
 284         input_report_abs(dev, ABS_PRESSURE, z);
 285         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 286
 287         if (priv->flags & ALPS_WHEEL)
 288                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 289
 290         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 291                 input_report_key(dev, BTN_FORWARD, forward);
 292                 input_report_key(dev, BTN_BACK, back);
 293         }
 294
 295         if (priv->flags & ALPS_FOUR_BUTTONS) {
 296                 input_report_key(dev, BTN_0, packet[2] & 4);
 297                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 298                 input_report_key(dev, BTN_2, packet[3] & 4);
 299                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 300         }
 301
 302         input_sync(dev);
 303 }
 304
 305 /*
 306  * Process bitmap data for V5 protocols. Return value is null.
 307  *
 308  * The bitmaps don't have enough data to track fingers, so this function
 309  * only generates points representing a bounding box of at most two contacts.
 310  * These two points are returned in fields->mt.
 311  */
 312 static void alps_process_bitmap_dolphin(struct alps_data *priv,
 313                                         struct alps_fields *fields)
 314 {
 315         int box_middle_x, box_middle_y;
 316         unsigned int x_map, y_map;
 317         unsigned char start_bit, end_bit;
 318         unsigned char x_msb, x_lsb, y_msb, y_lsb;
 319
 320         x_map = fields->x_map;
 321         y_map = fields->y_map;
 322
 323         if (!x_map || !y_map)
 324                 return;
 325
 326         /* Get Most-significant and Least-significant bit */
 327         x_msb = fls(x_map);
 328         x_lsb = ffs(x_map);
 329         y_msb = fls(y_map);
 330         y_lsb = ffs(y_map);
 331
 332         /* Most-significant bit should never exceed max sensor line number */
 333         if (x_msb > priv->x_bits || y_msb > priv->y_bits)
 334                 return;
 335
 336         if (fields->fingers > 1) {
 337                 start_bit = priv->x_bits - x_msb;
 338                 end_bit = priv->x_bits - x_lsb;
 339                 box_middle_x = (priv->x_max * (start_bit + end_bit)) /
 340                                 (2 * (priv->x_bits - 1));
 341
 342                 start_bit = y_lsb - 1;
 343                 end_bit = y_msb - 1;
 344                 box_middle_y = (priv->y_max * (start_bit + end_bit)) /
 345                                 (2 * (priv->y_bits - 1));
 346                 fields->mt[0] = fields->st;
 347                 fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
 348                 fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
 349         }
 350 }
 351
 352 static void alps_get_bitmap_points(unsigned int map,
 353                                    struct alps_bitmap_point *low,
 354                                    struct alps_bitmap_point *high,
 355                                    int *fingers)
 356 {
 357         struct alps_bitmap_point *point;
 358         int i, bit, prev_bit = 0;
 359
 360         point = low;
 361         for (i = 0; map != 0; i++, map >>= 1) {
 362                 bit = map & 1;
 363                 if (bit) {
 364                         if (!prev_bit) {
 365                                 point->start_bit = i;
 366                                 point->num_bits = 0;
 367                                 (*fingers)++;
 368                         }
 369                         point->num_bits++;
 370                 } else {
 371                         if (prev_bit)
 372                                 point = high;
 373                 }
 374                 prev_bit = bit;
 375         }
 376 }
 377
 378 /*
 379  * Process bitmap data from v3 and v4 protocols. Returns the number of
 380  * fingers detected. A return value of 0 means at least one of the
 381  * bitmaps was empty.
 382  *
 383  * The bitmaps don't have enough data to track fingers, so this function
 384  * only generates points representing a bounding box of all contacts.
 385  * These points are returned in fields->mt when the return value
 386  * is greater than 0.
 387  */
 388 static int alps_process_bitmap(struct alps_data *priv,
 389                                struct alps_fields *fields)
 390 {
 391         int i, fingers_x = 0, fingers_y = 0, fingers, closest;
 392         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 393         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 394         struct input_mt_pos corner[4];
 395
 396         if (!fields->x_map || !fields->y_map)
 397                 return 0;
 398
 399         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
 400         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
 401
 402         /*
 403          * Fingers can overlap, so we use the maximum count of fingers
 404          * on either axis as the finger count.
 405          */
 406         fingers = max(fingers_x, fingers_y);
 407
 408         /*
 409          * If an axis reports only a single contact, we have overlapping or
 410          * adjacent fingers. Divide the single contact between the two points.
 411          */
 412         if (fingers_x == 1) {
 413                 i = (x_low.num_bits - 1) / 2;
 414                 x_low.num_bits = x_low.num_bits - i;
 415                 x_high.start_bit = x_low.start_bit + i;
 416                 x_high.num_bits = max(i, 1);
 417         }
 418         if (fingers_y == 1) {
 419                 i = (y_low.num_bits - 1) / 2;
 420                 y_low.num_bits = y_low.num_bits - i;
 421                 y_high.start_bit = y_low.start_bit + i;
 422                 y_high.num_bits = max(i, 1);
 423         }
 424
 425         /* top-left corner */
 426         corner[0].x =
 427                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 428                 (2 * (priv->x_bits - 1));
 429         corner[0].y =
 430                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 431                 (2 * (priv->y_bits - 1));
 432
 433         /* top-right corner */
 434         corner[1].x =
 435                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 436                 (2 * (priv->x_bits - 1));
 437         corner[1].y =
 438                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 439                 (2 * (priv->y_bits - 1));
 440
 441         /* bottom-right corner */
 442         corner[2].x =
 443                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 444                 (2 * (priv->x_bits - 1));
 445         corner[2].y =
 446                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 447                 (2 * (priv->y_bits - 1));
 448
 449         /* bottom-left corner */
 450         corner[3].x =
 451                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 452                 (2 * (priv->x_bits - 1));
 453         corner[3].y =
 454                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 455                 (2 * (priv->y_bits - 1));
 456
 457         /* y-bitmap order is reversed, except on rushmore */
 458         if (priv->proto_version != ALPS_PROTO_V3_RUSHMORE) {
 459                 for (i = 0; i < 4; i++)
 460                         corner[i].y = priv->y_max - corner[i].y;
 461         }
 462
 463         /*
 464          * We only select a corner for the second touch once per 2 finger
 465          * touch sequence to avoid the chosen corner (and thus the coordinates)
 466          * jumping around when the first touch is in the middle.
 467          */
 468         if (priv->second_touch == -1) {
 469                 /* Find corner closest to our st coordinates */
 470                 closest = 0x7fffffff;
 471                 for (i = 0; i < 4; i++) {
 472                         int dx = fields->st.x - corner[i].x;
 473                         int dy = fields->st.y - corner[i].y;
 474                         int distance = dx * dx + dy * dy;
 475
 476                         if (distance < closest) {
 477                                 priv->second_touch = i;
 478                                 closest = distance;
 479                         }
 480                 }
 481                 /* And select the opposite corner to use for the 2nd touch */
 482                 priv->second_touch = (priv->second_touch + 2) % 4;
 483         }
 484
 485         fields->mt[0] = fields->st;
 486         fields->mt[1] = corner[priv->second_touch];
 487
 488         return fingers;
 489 }
 490
 491 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
 492 {
 493         input_mt_slot(dev, slot);
 494         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 495         input_report_abs(dev, ABS_MT_POSITION_X, x);
 496         input_report_abs(dev, ABS_MT_POSITION_Y, y);
 497 }
 498
 499 static void alps_report_mt_data(struct psmouse *psmouse, int n)
 500 {
 501         struct alps_data *priv = psmouse->private;
 502         struct input_dev *dev = psmouse->dev;
 503         struct alps_fields *f = &priv->f;
 504         int i, slot[MAX_TOUCHES];
 505
 506         input_mt_assign_slots(dev, slot, f->mt, n, 0);
 507         for (i = 0; i < n; i++)
 508                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
 509
 510         input_mt_sync_frame(dev);
 511 }
 512
 513 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
 514 {
 515         struct alps_data *priv = psmouse->private;
 516         struct input_dev *dev = psmouse->dev;
 517         struct alps_fields *f = &priv->f;
 518
 519         /* Use st data when we don't have mt data */
 520         if (fingers < 2) {
 521                 f->mt[0].x = f->st.x;
 522                 f->mt[0].y = f->st.y;
 523                 fingers = f->pressure > 0 ? 1 : 0;
 524                 priv->second_touch = -1;
 525         }
 526
 527         alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
 528
 529         input_mt_report_finger_count(dev, fingers);
 530
 531         input_report_key(dev, BTN_LEFT, f->left);
 532         input_report_key(dev, BTN_RIGHT, f->right);
 533         input_report_key(dev, BTN_MIDDLE, f->middle);
 534
 535         input_report_abs(dev, ABS_PRESSURE, f->pressure);
 536
 537         input_sync(dev);
 538 }
 539
 540 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 541 {
 542         struct alps_data *priv = psmouse->private;
 543         unsigned char *packet = psmouse->packet;
 544         struct input_dev *dev = priv->dev2;
 545         int x, y, z, left, right, middle;
 546
 547         /* It should be a DualPoint when received trackstick packet */
 548         if (!(priv->flags & ALPS_DUALPOINT)) {
 549                 psmouse_warn(psmouse,
 550                              "Rejected trackstick packet from non DualPoint device");
 551                 return;
 552         }
 553
 554         /* Sanity check packet */
 555         if (!(packet[0] & 0x40)) {
 556                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 557                 return;
 558         }
 559
 560         /*
 561          * There's a special packet that seems to indicate the end
 562          * of a stream of trackstick data. Filter these out.
 563          */
 564         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 565                 return;
 566
 567         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 568         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 569         z = (packet[4] & 0x7c) >> 2;
 570
 571         /*
 572          * The x and y values tend to be quite large, and when used
 573          * alone the trackstick is difficult to use. Scale them down
 574          * to compensate.
 575          */
 576         x /= 8;
 577         y /= 8;
 578
 579         input_report_rel(dev, REL_X, x);
 580         input_report_rel(dev, REL_Y, -y);
 581
 582         /*
 583          * Most ALPS models report the trackstick buttons in the touchpad
 584          * packets, but a few report them here. No reliable way has been
 585          * found to differentiate between the models upfront, so we enable
 586          * the quirk in response to seeing a button press in the trackstick
 587          * packet.
 588          */
 589         left = packet[3] & 0x01;
 590         right = packet[3] & 0x02;
 591         middle = packet[3] & 0x04;
 592
 593         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 594             (left || right || middle))
 595                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 596
 597         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 598                 input_report_key(dev, BTN_LEFT, left);
 599                 input_report_key(dev, BTN_RIGHT, right);
 600                 input_report_key(dev, BTN_MIDDLE, middle);
 601         }
 602
 603         input_sync(dev);
 604         return;
 605 }
 606
 607 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 608 {
 609         f->left = !!(p[3] & 0x01);
 610         f->right = !!(p[3] & 0x02);
 611         f->middle = !!(p[3] & 0x04);
 612
 613         f->ts_left = !!(p[3] & 0x10);
 614         f->ts_right = !!(p[3] & 0x20);
 615         f->ts_middle = !!(p[3] & 0x40);
 616 }
 617
 618 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 619                                  struct psmouse *psmouse)
 620 {
 621         f->first_mp = !!(p[4] & 0x40);
 622         f->is_mp = !!(p[0] & 0x40);
 623
 624         if (f->is_mp) {
 625                 f->fingers = (p[5] & 0x3) + 1;
 626                 f->x_map = ((p[4] & 0x7e) << 8) |
 627                            ((p[1] & 0x7f) << 2) |
 628                            ((p[0] & 0x30) >> 4);
 629                 f->y_map = ((p[3] & 0x70) << 4) |
 630                            ((p[2] & 0x7f) << 1) |
 631                            (p[4] & 0x01);
 632         } else {
 633                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 634                        ((p[0] & 0x30) >> 4);
 635                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 636                 f->pressure = p[5] & 0x7f;
 637
 638                 alps_decode_buttons_v3(f, p);
 639         }
 640
 641         return 0;
 642 }
 643
 644 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 645                                  struct psmouse *psmouse)
 646 {
 647         f->first_mp = !!(p[4] & 0x40);
 648         f->is_mp = !!(p[5] & 0x40);
 649
 650         if (f->is_mp) {
 651                 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
 652                 f->x_map = ((p[5] & 0x10) << 11) |
 653                            ((p[4] & 0x7e) << 8) |
 654                            ((p[1] & 0x7f) << 2) |
 655                            ((p[0] & 0x30) >> 4);
 656                 f->y_map = ((p[5] & 0x20) << 6) |
 657                            ((p[3] & 0x70) << 4) |
 658                            ((p[2] & 0x7f) << 1) |
 659                            (p[4] & 0x01);
 660         } else {
 661                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 662                        ((p[0] & 0x30) >> 4);
 663                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 664                 f->pressure = p[5] & 0x7f;
 665
 666                 alps_decode_buttons_v3(f, p);
 667         }
 668
 669         return 0;
 670 }
 671
 672 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 673                                 struct psmouse *psmouse)
 674 {
 675         u64 palm_data = 0;
 676         struct alps_data *priv = psmouse->private;
 677
 678         f->first_mp = !!(p[0] & 0x02);
 679         f->is_mp = !!(p[0] & 0x20);
 680
 681         if (!f->is_mp) {
 682                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 683                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 684                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
 685                 alps_decode_buttons_v3(f, p);
 686         } else {
 687                 f->fingers = ((p[0] & 0x6) >> 1 |
 688                      (p[0] & 0x10) >> 2);
 689
 690                 palm_data = (p[1] & 0x7f) |
 691                             ((p[2] & 0x7f) << 7) |
 692                             ((p[4] & 0x7f) << 14) |
 693                             ((p[5] & 0x7f) << 21) |
 694                             ((p[3] & 0x07) << 28) |
 695                             (((u64)p[3] & 0x70) << 27) |
 696                             (((u64)p[0] & 0x01) << 34);
 697
 698                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
 699                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
 700
 701                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
 702                 f->x_map = (palm_data >> priv->y_bits) &
 703                            (BIT(priv->x_bits) - 1);
 704         }
 705
 706         return 0;
 707 }
 708
 709 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 710 {
 711         struct alps_data *priv = psmouse->private;
 712         unsigned char *packet = psmouse->packet;
 713         struct input_dev *dev2 = priv->dev2;
 714         struct alps_fields *f = &priv->f;
 715         int fingers = 0;
 716
 717         memset(f, 0, sizeof(*f));
 718
 719         priv->decode_fields(f, packet, psmouse);
 720
 721         /*
 722          * There's no single feature of touchpad position and bitmap packets
 723          * that can be used to distinguish between them. We rely on the fact
 724          * that a bitmap packet should always follow a position packet with
 725          * bit 6 of packet[4] set.
 726          */
 727         if (priv->multi_packet) {
 728                 /*
 729                  * Sometimes a position packet will indicate a multi-packet
 730                  * sequence, but then what follows is another position
 731                  * packet. Check for this, and when it happens process the
 732                  * position packet as usual.
 733                  */
 734                 if (f->is_mp) {
 735                         fingers = f->fingers;
 736                         /*
 737                          * Bitmap processing uses position packet's coordinate
 738                          * data, so we need to do decode it first.
 739                          */
 740                         priv->decode_fields(f, priv->multi_data, psmouse);
 741
 742                         if (priv->proto_version == ALPS_PROTO_V3 ||
 743                             priv->proto_version == ALPS_PROTO_V3_RUSHMORE) {
 744                                 if (alps_process_bitmap(priv, f) == 0)
 745                                         fingers = 0; /* Use st data */
 746                         } else {
 747                                 /*
 748                                  * Since Dolphin's finger number is reliable,
 749                                  * there is no need to compare with bmap_fn.
 750                                  */
 751                                 alps_process_bitmap_dolphin(priv, f);
 752                         }
 753                 } else {
 754                         priv->multi_packet = 0;
 755                 }
 756         }
 757
 758         /*
 759          * Bit 6 of byte 0 is not usually set in position packets. The only
 760          * times it seems to be set is in situations where the data is
 761          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 762          * this combined with the fact that this bit is useful for filtering
 763          * out misidentified bitmap packets, we reject anything with this
 764          * bit set.
 765          */
 766         if (f->is_mp)
 767                 return;
 768
 769         if (!priv->multi_packet && f->first_mp) {
 770                 priv->multi_packet = 1;
 771                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 772                 return;
 773         }
 774
 775         priv->multi_packet = 0;
 776
 777         /*
 778          * Sometimes the hardware sends a single packet with z = 0
 779          * in the middle of a stream. Real releases generate packets
 780          * with x, y, and z all zero, so these seem to be flukes.
 781          * Ignore them.
 782          */
 783         if (f->st.x && f->st.y && !f->pressure)
 784                 return;
 785
 786         alps_report_semi_mt_data(psmouse, fingers);
 787
 788         if ((priv->flags & ALPS_DUALPOINT) &&
 789             !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 790                 input_report_key(dev2, BTN_LEFT, f->ts_left);
 791                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
 792                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
 793                 input_sync(dev2);
 794         }
 795 }
 796
 797 static void alps_process_packet_v3(struct psmouse *psmouse)
 798 {
 799         unsigned char *packet = psmouse->packet;
 800
 801         /*
 802          * v3 protocol packets come in three types, two representing
 803          * touchpad data and one representing trackstick data.
 804          * Trackstick packets seem to be distinguished by always
 805          * having 0x3f in the last byte. This value has never been
 806          * observed in the last byte of either of the other types
 807          * of packets.
 808          */
 809         if (packet[5] == 0x3f) {
 810                 alps_process_trackstick_packet_v3(psmouse);
 811                 return;
 812         }
 813
 814         alps_process_touchpad_packet_v3_v5(psmouse);
 815 }
 816
 817 static void alps_process_packet_v6(struct psmouse *psmouse)
 818 {
 819         struct alps_data *priv = psmouse->private;
 820         unsigned char *packet = psmouse->packet;
 821         struct input_dev *dev = psmouse->dev;
 822         struct input_dev *dev2 = priv->dev2;
 823         int x, y, z, left, right, middle;
 824
 825         /*
 826          * We can use Byte5 to distinguish if the packet is from Touchpad
 827          * or Trackpoint.
 828          * Touchpad:    0 - 0x7E
 829          * Trackpoint:  0x7F
 830          */
 831         if (packet[5] == 0x7F) {
 832                 /* It should be a DualPoint when received Trackpoint packet */
 833                 if (!(priv->flags & ALPS_DUALPOINT)) {
 834                         psmouse_warn(psmouse,
 835                                      "Rejected trackstick packet from non DualPoint device");
 836                         return;
 837                 }
 838
 839                 /* Trackpoint packet */
 840                 x = packet[1] | ((packet[3] & 0x20) << 2);
 841                 y = packet[2] | ((packet[3] & 0x40) << 1);
 842                 z = packet[4];
 843                 left = packet[3] & 0x01;
 844                 right = packet[3] & 0x02;
 845                 middle = packet[3] & 0x04;
 846
 847                 /* To prevent the cursor jump when finger lifted */
 848                 if (x == 0x7F && y == 0x7F && z == 0x7F)
 849                         x = y = z = 0;
 850
 851                 /* Divide 4 since trackpoint's speed is too fast */
 852                 input_report_rel(dev2, REL_X, (char)x / 4);
 853                 input_report_rel(dev2, REL_Y, -((char)y / 4));
 854
 855                 input_report_key(dev2, BTN_LEFT, left);
 856                 input_report_key(dev2, BTN_RIGHT, right);
 857                 input_report_key(dev2, BTN_MIDDLE, middle);
 858
 859                 input_sync(dev2);
 860                 return;
 861         }
 862
 863         /* Touchpad packet */
 864         x = packet[1] | ((packet[3] & 0x78) << 4);
 865         y = packet[2] | ((packet[4] & 0x78) << 4);
 866         z = packet[5];
 867         left = packet[3] & 0x01;
 868         right = packet[3] & 0x02;
 869
 870         if (z > 30)
 871                 input_report_key(dev, BTN_TOUCH, 1);
 872         if (z < 25)
 873                 input_report_key(dev, BTN_TOUCH, 0);
 874
 875         if (z > 0) {
 876                 input_report_abs(dev, ABS_X, x);
 877                 input_report_abs(dev, ABS_Y, y);
 878         }
 879
 880         input_report_abs(dev, ABS_PRESSURE, z);
 881         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 882
 883         /* v6 touchpad does not have middle button */
 884         input_report_key(dev, BTN_LEFT, left);
 885         input_report_key(dev, BTN_RIGHT, right);
 886
 887         input_sync(dev);
 888 }
 889
 890 static void alps_process_packet_v4(struct psmouse *psmouse)
 891 {
 892         struct alps_data *priv = psmouse->private;
 893         unsigned char *packet = psmouse->packet;
 894         struct alps_fields *f = &priv->f;
 895         int offset;
 896
 897         /*
 898          * v4 has a 6-byte encoding for bitmap data, but this data is
 899          * broken up between 3 normal packets. Use priv->multi_packet to
 900          * track our position in the bitmap packet.
 901          */
 902         if (packet[6] & 0x40) {
 903                 /* sync, reset position */
 904                 priv->multi_packet = 0;
 905         }
 906
 907         if (WARN_ON_ONCE(priv->multi_packet > 2))
 908                 return;
 909
 910         offset = 2 * priv->multi_packet;
 911         priv->multi_data[offset] = packet[6];
 912         priv->multi_data[offset + 1] = packet[7];
 913
 914         f->left = !!(packet[4] & 0x01);
 915         f->right = !!(packet[4] & 0x02);
 916
 917         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 918                   ((packet[0] & 0x30) >> 4);
 919         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 920         f->pressure = packet[5] & 0x7f;
 921
 922         if (++priv->multi_packet > 2) {
 923                 priv->multi_packet = 0;
 924
 925                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
 926                            ((priv->multi_data[3] & 0x60) << 3) |
 927                            ((priv->multi_data[0] & 0x3f) << 2) |
 928                            ((priv->multi_data[1] & 0x60) >> 5);
 929                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
 930                            ((priv->multi_data[3] & 0x1f) << 5) |
 931                             (priv->multi_data[1] & 0x1f);
 932
 933                 f->fingers = alps_process_bitmap(priv, f);
 934         }
 935
 936         alps_report_semi_mt_data(psmouse, f->fingers);
 937 }
 938
 939 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
 940 {
 941         switch (psmouse->pktcnt) {
 942         case 3:
 943                 return (psmouse->packet[2] & 0x40) == 0x40;
 944         case 4:
 945                 return (psmouse->packet[3] & 0x48) == 0x48;
 946         case 6:
 947                 return (psmouse->packet[5] & 0x40) == 0x00;
 948         }
 949         return true;
 950 }
 951
 952 static unsigned char alps_get_packet_id_v7(char *byte)
 953 {
 954         unsigned char packet_id;
 955
 956         if (byte[4] & 0x40)
 957                 packet_id = V7_PACKET_ID_TWO;
 958         else if (byte[4] & 0x01)
 959                 packet_id = V7_PACKET_ID_MULTI;
 960         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
 961                 packet_id = V7_PACKET_ID_NEW;
 962         else if (byte[1] == 0x00 && byte[4] == 0x00)
 963                 packet_id = V7_PACKET_ID_IDLE;
 964         else
 965                 packet_id = V7_PACKET_ID_UNKNOWN;
 966
 967         return packet_id;
 968 }
 969
 970 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
 971                                           unsigned char *pkt,
 972                                           unsigned char pkt_id)
 973 {
 974         mt[0].x = ((pkt[2] & 0x80) << 4);
 975         mt[0].x |= ((pkt[2] & 0x3F) << 5);
 976         mt[0].x |= ((pkt[3] & 0x30) >> 1);
 977         mt[0].x |= (pkt[3] & 0x07);
 978         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
 979
 980         mt[1].x = ((pkt[3] & 0x80) << 4);
 981         mt[1].x |= ((pkt[4] & 0x80) << 3);
 982         mt[1].x |= ((pkt[4] & 0x3F) << 4);
 983         mt[1].y = ((pkt[5] & 0x80) << 3);
 984         mt[1].y |= ((pkt[5] & 0x3F) << 4);
 985
 986         switch (pkt_id) {
 987         case V7_PACKET_ID_TWO:
 988                 mt[1].x &= ~0x000F;
 989                 mt[1].y |= 0x000F;
 990                 break;
 991
 992         case V7_PACKET_ID_MULTI:
 993                 mt[1].x &= ~0x003F;
 994                 mt[1].y &= ~0x0020;
 995                 mt[1].y |= ((pkt[4] & 0x02) << 4);
 996                 mt[1].y |= 0x001F;
 997                 break;
 998
 999         case V7_PACKET_ID_NEW:
1000                 mt[1].x &= ~0x003F;
1001                 mt[1].x |= (pkt[0] & 0x20);
1002                 mt[1].y |= 0x000F;
1003                 break;
1004         }
1005
1006         mt[0].y = 0x7FF - mt[0].y;
1007         mt[1].y = 0x7FF - mt[1].y;
1008 }
1009
1010 static int alps_get_mt_count(struct input_mt_pos *mt)
1011 {
1012         int i, fingers = 0;
1013
1014         for (i = 0; i < MAX_TOUCHES; i++) {
1015                 if (mt[i].x != 0 || mt[i].y != 0)
1016                         fingers++;
1017         }
1018
1019         return fingers;
1020 }
1021
1022 static int alps_decode_packet_v7(struct alps_fields *f,
1023                                   unsigned char *p,
1024                                   struct psmouse *psmouse)
1025 {
1026         struct alps_data *priv = psmouse->private;
1027         unsigned char pkt_id;
1028
1029         pkt_id = alps_get_packet_id_v7(p);
1030         if (pkt_id == V7_PACKET_ID_IDLE)
1031                 return 0;
1032         if (pkt_id == V7_PACKET_ID_UNKNOWN)
1033                 return -1;
1034         /*
1035          * NEW packets are send to indicate a discontinuity in the finger
1036          * coordinate reporting. Specifically a finger may have moved from
1037          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
1038          * us.
1039          *
1040          * NEW packets have 3 problems:
1041          * 1) They do not contain middle / right button info (on non clickpads)
1042          *    this can be worked around by preserving the old button state
1043          * 2) They do not contain an accurate fingercount, and they are
1044          *    typically send when the number of fingers changes. We cannot use
1045          *    the old finger count as that may mismatch with the amount of
1046          *    touch coordinates we've available in the NEW packet
1047          * 3) Their x data for the second touch is inaccurate leading to
1048          *    a possible jump of the x coordinate by 16 units when the first
1049          *    non NEW packet comes in
1050          * Since problems 2 & 3 cannot be worked around, just ignore them.
1051          */
1052         if (pkt_id == V7_PACKET_ID_NEW)
1053                 return 1;
1054
1055         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1056
1057         if (pkt_id == V7_PACKET_ID_TWO)
1058                 f->fingers = alps_get_mt_count(f->mt);
1059         else /* pkt_id == V7_PACKET_ID_MULTI */
1060                 f->fingers = 3 + (p[5] & 0x03);
1061
1062         f->left = (p[0] & 0x80) >> 7;
1063         if (priv->flags & ALPS_BUTTONPAD) {
1064                 if (p[0] & 0x20)
1065                         f->fingers++;
1066                 if (p[0] & 0x10)
1067                         f->fingers++;
1068         } else {
1069                 f->right = (p[0] & 0x20) >> 5;
1070                 f->middle = (p[0] & 0x10) >> 4;
1071         }
1072
1073         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1074         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1075                 f->mt[0].x = f->mt[1].x;
1076                 f->mt[0].y = f->mt[1].y;
1077                 f->mt[1].x = 0;
1078                 f->mt[1].y = 0;
1079         }
1080
1081         return 0;
1082 }
1083
1084 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1085 {
1086         struct alps_data *priv = psmouse->private;
1087         unsigned char *packet = psmouse->packet;
1088         struct input_dev *dev2 = priv->dev2;
1089         int x, y, z, left, right, middle;
1090
1091         /* It should be a DualPoint when received trackstick packet */
1092         if (!(priv->flags & ALPS_DUALPOINT)) {
1093                 psmouse_warn(psmouse,
1094                              "Rejected trackstick packet from non DualPoint device");
1095                 return;
1096         }
1097
1098         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1099         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1100             ((packet[3] & 0x20) << 1);
1101         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1102
1103         left = (packet[1] & 0x01);
1104         right = (packet[1] & 0x02) >> 1;
1105         middle = (packet[1] & 0x04) >> 2;
1106
1107         /* Divide 2 since trackpoint's speed is too fast */
1108         input_report_rel(dev2, REL_X, (char)x / 2);
1109         input_report_rel(dev2, REL_Y, -((char)y / 2));
1110
1111         input_report_key(dev2, BTN_LEFT, left);
1112         input_report_key(dev2, BTN_RIGHT, right);
1113         input_report_key(dev2, BTN_MIDDLE, middle);
1114
1115         input_sync(dev2);
1116 }
1117
1118 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1119 {
1120         struct alps_data *priv = psmouse->private;
1121         struct input_dev *dev = psmouse->dev;
1122         struct alps_fields *f = &priv->f;
1123
1124         memset(f, 0, sizeof(*f));
1125
1126         if (priv->decode_fields(f, psmouse->packet, psmouse))
1127                 return;
1128
1129         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1130
1131         input_mt_report_finger_count(dev, f->fingers);
1132
1133         input_report_key(dev, BTN_LEFT, f->left);
1134         input_report_key(dev, BTN_RIGHT, f->right);
1135         input_report_key(dev, BTN_MIDDLE, f->middle);
1136
1137         input_sync(dev);
1138 }
1139
1140 static void alps_process_packet_v7(struct psmouse *psmouse)
1141 {
1142         unsigned char *packet = psmouse->packet;
1143
1144         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1145                 alps_process_trackstick_packet_v7(psmouse);
1146         else
1147                 alps_process_touchpad_packet_v7(psmouse);
1148 }
1149
1150 static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)
1151 {
1152         unsigned char pkt_id = SS4_PACKET_ID_IDLE;
1153
1154         if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&
1155             (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) {
1156                 pkt_id = SS4_PACKET_ID_IDLE;
1157         } else if (!(byte[3] & 0x10)) {
1158                 pkt_id = SS4_PACKET_ID_ONE;
1159         } else if (!(byte[3] & 0x20)) {
1160                 pkt_id = SS4_PACKET_ID_TWO;
1161         } else {
1162                 pkt_id = SS4_PACKET_ID_MULTI;
1163         }
1164
1165         return pkt_id;
1166 }
1167
1168 static int alps_decode_ss4_v2(struct alps_fields *f,
1169                               unsigned char *p, struct psmouse *psmouse)
1170 {
1171         struct alps_data *priv = psmouse->private;
1172         unsigned char pkt_id;
1173         unsigned int no_data_x, no_data_y;
1174
1175         pkt_id = alps_get_pkt_id_ss4_v2(p);
1176
1177         /* Current packet is 1Finger coordinate packet */
1178         switch (pkt_id) {
1179         case SS4_PACKET_ID_ONE:
1180                 f->mt[0].x = SS4_1F_X_V2(p);
1181                 f->mt[0].y = SS4_1F_Y_V2(p);
1182                 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1183                 f->fingers = 1;
1184                 f->first_mp = 0;
1185                 f->is_mp = 0;
1186                 break;
1187
1188         case SS4_PACKET_ID_TWO:
1189                 if (priv->flags & ALPS_BUTTONPAD) {
1190                         f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1191                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1192                         f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1193                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1194                 } else {
1195                         f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1196                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1197                         f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1198                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1199                 }
1200                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1201
1202                 if (SS4_IS_MF_CONTINUE(p)) {
1203                         f->first_mp = 1;
1204                 } else {
1205                         f->fingers = 2;
1206                         f->first_mp = 0;
1207                 }
1208                 f->is_mp = 0;
1209
1210                 break;
1211
1212         case SS4_PACKET_ID_MULTI:
1213                 if (priv->flags & ALPS_BUTTONPAD) {
1214                         f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1215                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1216                         f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1217                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1218                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1219                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1220                 } else {
1221                         f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1222                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1223                         f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1224                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1225                         no_data_x = SS4_MFPACKET_NO_AX;
1226                         no_data_y = SS4_MFPACKET_NO_AY;
1227                 }
1228
1229                 f->first_mp = 0;
1230                 f->is_mp = 1;
1231
1232                 if (SS4_IS_5F_DETECTED(p)) {
1233                         f->fingers = 5;
1234                 } else if (f->mt[3].x == no_data_x &&
1235                              f->mt[3].y == no_data_y) {
1236                         f->mt[3].x = 0;
1237                         f->mt[3].y = 0;
1238                         f->fingers = 3;
1239                 } else {
1240                         f->fingers = 4;
1241                 }
1242                 break;
1243
1244         case SS4_PACKET_ID_IDLE:
1245         default:
1246                 memset(f, 0, sizeof(struct alps_fields));
1247                 break;
1248         }
1249
1250         f->left = !!(SS4_BTN_V2(p) & 0x01);
1251         if (!(priv->flags & ALPS_BUTTONPAD)) {
1252                 f->right = !!(SS4_BTN_V2(p) & 0x02);
1253                 f->middle = !!(SS4_BTN_V2(p) & 0x04);
1254         }
1255
1256         return 0;
1257 }
1258
1259 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1260 {
1261         struct alps_data *priv = psmouse->private;
1262         unsigned char *packet = psmouse->packet;
1263         struct input_dev *dev = psmouse->dev;
1264         struct alps_fields *f = &priv->f;
1265
1266         memset(f, 0, sizeof(struct alps_fields));
1267         priv->decode_fields(f, packet, psmouse);
1268         if (priv->multi_packet) {
1269                 /*
1270                  * Sometimes the first packet will indicate a multi-packet
1271                  * sequence, but sometimes the next multi-packet would not
1272                  * come. Check for this, and when it happens process the
1273                  * position packet as usual.
1274                  */
1275                 if (f->is_mp) {
1276                         /* Now process the 1st packet */
1277                         priv->decode_fields(f, priv->multi_data, psmouse);
1278                 } else {
1279                         priv->multi_packet = 0;
1280                 }
1281         }
1282
1283         /*
1284          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1285          * When it is set, it means 2nd packet comes without 1st packet come.
1286          */
1287         if (f->is_mp)
1288                 return;
1289
1290         /* Save the first packet */
1291         if (!priv->multi_packet && f->first_mp) {
1292                 priv->multi_packet = 1;
1293                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1294                 return;
1295         }
1296
1297         priv->multi_packet = 0;
1298
1299         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1300
1301         input_mt_report_finger_count(dev, f->fingers);
1302
1303         input_report_key(dev, BTN_LEFT, f->left);
1304         input_report_key(dev, BTN_RIGHT, f->right);
1305         input_report_key(dev, BTN_MIDDLE, f->middle);
1306
1307         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1308         input_sync(dev);
1309 }
1310
1311 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1312 {
1313         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1314                 return false;
1315         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1316                 return false;
1317         return true;
1318 }
1319
1320 static DEFINE_MUTEX(alps_mutex);
1321
1322 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1323 {
1324         struct alps_data *priv =
1325                 container_of(work, struct alps_data, dev3_register_work.work);
1326         struct psmouse *psmouse = priv->psmouse;
1327         struct input_dev *dev3;
1328         int error = 0;
1329
1330         mutex_lock(&alps_mutex);
1331
1332         if (priv->dev3)
1333                 goto out;
1334
1335         dev3 = input_allocate_device();
1336         if (!dev3) {
1337                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1338                 error = -ENOMEM;
1339                 goto out;
1340         }
1341
1342         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1343                  psmouse->ps2dev.serio->phys,
1344                  (priv->dev2 ? "input2" : "input1"));
1345         dev3->phys = priv->phys3;
1346
1347         /*
1348          * format of input device name is: "protocol vendor name"
1349          * see function psmouse_switch_protocol() in psmouse-base.c
1350          */
1351         dev3->name = "PS/2 ALPS Mouse";
1352
1353         dev3->id.bustype = BUS_I8042;
1354         dev3->id.vendor  = 0x0002;
1355         dev3->id.product = PSMOUSE_PS2;
1356         dev3->id.version = 0x0000;
1357         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1358
1359         input_set_capability(dev3, EV_REL, REL_X);
1360         input_set_capability(dev3, EV_REL, REL_Y);
1361         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1362         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1363         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1364
1365         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1366
1367         error = input_register_device(dev3);
1368         if (error) {
1369                 psmouse_err(psmouse,
1370                             "failed to register secondary device: %d\n",
1371                             error);
1372                 input_free_device(dev3);
1373                 goto out;
1374         }
1375
1376         priv->dev3 = dev3;
1377
1378 out:
1379         /*
1380          * Save the error code so that we can detect that we
1381          * already tried to create the device.
1382          */
1383         if (error)
1384                 priv->dev3 = ERR_PTR(error);
1385
1386         mutex_unlock(&alps_mutex);
1387 }
1388
1389 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1390                                         unsigned char packet[],
1391                                         bool report_buttons)
1392 {
1393         struct alps_data *priv = psmouse->private;
1394         struct input_dev *dev;
1395
1396         /* Figure out which device to use to report the bare packet */
1397         if (priv->proto_version == ALPS_PROTO_V2 &&
1398             (priv->flags & ALPS_DUALPOINT)) {
1399                 /* On V2 devices the DualPoint Stick reports bare packets */
1400                 dev = priv->dev2;
1401         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1402                 /* Register dev3 mouse if we received PS/2 packet first time */
1403                 if (!IS_ERR(priv->dev3))
1404                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1405                                            0);
1406                 return;
1407         } else {
1408                 dev = priv->dev3;
1409         }
1410
1411         if (report_buttons)
1412                 alps_report_buttons(dev, NULL,
1413                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1414
1415         input_report_rel(dev, REL_X,
1416                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1417         input_report_rel(dev, REL_Y,
1418                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1419
1420         input_sync(dev);
1421 }
1422
1423 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1424 {
1425         struct alps_data *priv = psmouse->private;
1426
1427         if (psmouse->pktcnt < 6)
1428                 return PSMOUSE_GOOD_DATA;
1429
1430         if (psmouse->pktcnt == 6) {
1431                 /*
1432                  * Start a timer to flush the packet if it ends up last
1433                  * 6-byte packet in the stream. Timer needs to fire
1434                  * psmouse core times out itself. 20 ms should be enough
1435                  * to decide if we are getting more data or not.
1436                  */
1437                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1438                 return PSMOUSE_GOOD_DATA;
1439         }
1440
1441         del_timer(&priv->timer);
1442
1443         if (psmouse->packet[6] & 0x80) {
1444
1445                 /*
1446                  * Highest bit is set - that means we either had
1447                  * complete ALPS packet and this is start of the
1448                  * next packet or we got garbage.
1449                  */
1450
1451                 if (((psmouse->packet[3] |
1452                       psmouse->packet[4] |
1453                       psmouse->packet[5]) & 0x80) ||
1454                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1455                         psmouse_dbg(psmouse,
1456                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1457                                     psmouse->packet + 3);
1458                         return PSMOUSE_BAD_DATA;
1459                 }
1460
1461                 priv->process_packet(psmouse);
1462
1463                 /* Continue with the next packet */
1464                 psmouse->packet[0] = psmouse->packet[6];
1465                 psmouse->pktcnt = 1;
1466
1467         } else {
1468
1469                 /*
1470                  * High bit is 0 - that means that we indeed got a PS/2
1471                  * packet in the middle of ALPS packet.
1472                  *
1473                  * There is also possibility that we got 6-byte ALPS
1474                  * packet followed  by 3-byte packet from trackpoint. We
1475                  * can not distinguish between these 2 scenarios but
1476                  * because the latter is unlikely to happen in course of
1477                  * normal operation (user would need to press all
1478                  * buttons on the pad and start moving trackpoint
1479                  * without touching the pad surface) we assume former.
1480                  * Even if we are wrong the wost thing that would happen
1481                  * the cursor would jump but we should not get protocol
1482                  * de-synchronization.
1483                  */
1484
1485                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1486                                             false);
1487
1488                 /*
1489                  * Continue with the standard ALPS protocol handling,
1490                  * but make sure we won't process it as an interleaved
1491                  * packet again, which may happen if all buttons are
1492                  * pressed. To avoid this let's reset the 4th bit which
1493                  * is normally 1.
1494                  */
1495                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1496                 psmouse->pktcnt = 4;
1497         }
1498
1499         return PSMOUSE_GOOD_DATA;
1500 }
1501
1502 static void alps_flush_packet(unsigned long data)
1503 {
1504         struct psmouse *psmouse = (struct psmouse *)data;
1505         struct alps_data *priv = psmouse->private;
1506
1507         serio_pause_rx(psmouse->ps2dev.serio);
1508
1509         if (psmouse->pktcnt == psmouse->pktsize) {
1510
1511                 /*
1512                  * We did not any more data in reasonable amount of time.
1513                  * Validate the last 3 bytes and process as a standard
1514                  * ALPS packet.
1515                  */
1516                 if ((psmouse->packet[3] |
1517                      psmouse->packet[4] |
1518                      psmouse->packet[5]) & 0x80) {
1519                         psmouse_dbg(psmouse,
1520                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1521                                     psmouse->packet + 3);
1522                 } else {
1523                         priv->process_packet(psmouse);
1524                 }
1525                 psmouse->pktcnt = 0;
1526         }
1527
1528         serio_continue_rx(psmouse->ps2dev.serio);
1529 }
1530
1531 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1532 {
1533         struct alps_data *priv = psmouse->private;
1534
1535         /*
1536          * Check if we are dealing with a bare PS/2 packet, presumably from
1537          * a device connected to the external PS/2 port. Because bare PS/2
1538          * protocol does not have enough constant bits to self-synchronize
1539          * properly we only do this if the device is fully synchronized.
1540          * Can not distinguish V8's first byte from PS/2 packet's
1541          */
1542         if (priv->proto_version != ALPS_PROTO_V8 &&
1543             !psmouse->out_of_sync_cnt &&
1544             (psmouse->packet[0] & 0xc8) == 0x08) {
1545
1546                 if (psmouse->pktcnt == 3) {
1547                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1548                                                     true);
1549                         return PSMOUSE_FULL_PACKET;
1550                 }
1551                 return PSMOUSE_GOOD_DATA;
1552         }
1553
1554         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1555
1556         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1557             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1558                 return alps_handle_interleaved_ps2(psmouse);
1559         }
1560
1561         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1562                 psmouse_dbg(psmouse,
1563                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1564                             psmouse->packet[0], priv->mask0, priv->byte0);
1565                 return PSMOUSE_BAD_DATA;
1566         }
1567
1568         /* Bytes 2 - pktsize should have 0 in the highest bit */
1569         if (priv->proto_version < ALPS_PROTO_V5 &&
1570             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1571             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1572                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1573                             psmouse->pktcnt - 1,
1574                             psmouse->packet[psmouse->pktcnt - 1]);
1575
1576                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1577                     psmouse->pktcnt == psmouse->pktsize) {
1578                         /*
1579                          * Some Dell boxes, such as Latitude E6440 or E7440
1580                          * with closed lid, quite often smash last byte of
1581                          * otherwise valid packet with 0xff. Given that the
1582                          * next packet is very likely to be valid let's
1583                          * report PSMOUSE_FULL_PACKET but not process data,
1584                          * rather than reporting PSMOUSE_BAD_DATA and
1585                          * filling the logs.
1586                          */
1587                         return PSMOUSE_FULL_PACKET;
1588                 }
1589
1590                 return PSMOUSE_BAD_DATA;
1591         }
1592
1593         if ((priv->proto_version == ALPS_PROTO_V7 &&
1594                         !alps_is_valid_package_v7(psmouse)) ||
1595             (priv->proto_version == ALPS_PROTO_V8 &&
1596                         !alps_is_valid_package_ss4_v2(psmouse))) {
1597                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1598                             psmouse->pktcnt - 1,
1599                             psmouse->packet[psmouse->pktcnt - 1]);
1600                 return PSMOUSE_BAD_DATA;
1601         }
1602
1603         if (psmouse->pktcnt == psmouse->pktsize) {
1604                 priv->process_packet(psmouse);
1605                 return PSMOUSE_FULL_PACKET;
1606         }
1607
1608         return PSMOUSE_GOOD_DATA;
1609 }
1610
1611 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1612 {
1613         struct ps2dev *ps2dev = &psmouse->ps2dev;
1614         struct alps_data *priv = psmouse->private;
1615         int command;
1616         unsigned char *param;
1617         unsigned char dummy[4];
1618
1619         BUG_ON(nibble > 0xf);
1620
1621         command = priv->nibble_commands[nibble].command;
1622         param = (command & 0x0f00) ?
1623                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1624
1625         if (ps2_command(ps2dev, param, command))
1626                 return -1;
1627
1628         return 0;
1629 }
1630
1631 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1632 {
1633         struct ps2dev *ps2dev = &psmouse->ps2dev;
1634         struct alps_data *priv = psmouse->private;
1635         int i, nibble;
1636
1637         if (ps2_command(ps2dev, NULL, priv->addr_command))
1638                 return -1;
1639
1640         for (i = 12; i >= 0; i -= 4) {
1641                 nibble = (addr >> i) & 0xf;
1642                 if (alps_command_mode_send_nibble(psmouse, nibble))
1643                         return -1;
1644         }
1645
1646         return 0;
1647 }
1648
1649 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1650 {
1651         struct ps2dev *ps2dev = &psmouse->ps2dev;
1652         unsigned char param[4];
1653
1654         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1655                 return -1;
1656
1657         /*
1658          * The address being read is returned in the first two bytes
1659          * of the result. Check that this address matches the expected
1660          * address.
1661          */
1662         if (addr != ((param[0] << 8) | param[1]))
1663                 return -1;
1664
1665         return param[2];
1666 }
1667
1668 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1669 {
1670         if (alps_command_mode_set_addr(psmouse, addr))
1671                 return -1;
1672         return __alps_command_mode_read_reg(psmouse, addr);
1673 }
1674
1675 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1676 {
1677         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1678                 return -1;
1679         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1680                 return -1;
1681         return 0;
1682 }
1683
1684 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1685                                        u8 value)
1686 {
1687         if (alps_command_mode_set_addr(psmouse, addr))
1688                 return -1;
1689         return __alps_command_mode_write_reg(psmouse, value);
1690 }
1691
1692 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1693                         int repeated_command, unsigned char *param)
1694 {
1695         struct ps2dev *ps2dev = &psmouse->ps2dev;
1696
1697         param[0] = 0;
1698         if (init_command && ps2_command(ps2dev, param, init_command))
1699                 return -EIO;
1700
1701         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1702             ps2_command(ps2dev,  NULL, repeated_command) ||
1703             ps2_command(ps2dev,  NULL, repeated_command))
1704                 return -EIO;
1705
1706         param[0] = param[1] = param[2] = 0xff;
1707         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1708                 return -EIO;
1709
1710         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1711                     repeated_command, param);
1712         return 0;
1713 }
1714
1715 static bool alps_check_valid_firmware_id(unsigned char id[])
1716 {
1717         if (id[0] == 0x73)
1718                 return true;
1719
1720         if (id[0] == 0x88 &&
1721             (id[1] == 0x07 ||
1722              id[1] == 0x08 ||
1723              (id[1] & 0xf0) == 0xb0 ||
1724              (id[1] & 0xf0) == 0xc0)) {
1725                 return true;
1726         }
1727
1728         return false;
1729 }
1730
1731 static int alps_enter_command_mode(struct psmouse *psmouse)
1732 {
1733         unsigned char param[4];
1734
1735         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1736                 psmouse_err(psmouse, "failed to enter command mode\n");
1737                 return -1;
1738         }
1739
1740         if (!alps_check_valid_firmware_id(param)) {
1741                 psmouse_dbg(psmouse,
1742                             "unknown response while entering command mode\n");
1743                 return -1;
1744         }
1745         return 0;
1746 }
1747
1748 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1749 {
1750         struct ps2dev *ps2dev = &psmouse->ps2dev;
1751         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1752                 return -1;
1753         return 0;
1754 }
1755
1756 /*
1757  * For DualPoint devices select the device that should respond to
1758  * subsequent commands. It looks like glidepad is behind stickpointer,
1759  * I'd thought it would be other way around...
1760  */
1761 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1762 {
1763         struct ps2dev *ps2dev = &psmouse->ps2dev;
1764         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1765
1766         if (ps2_command(ps2dev, NULL, cmd) ||
1767             ps2_command(ps2dev, NULL, cmd) ||
1768             ps2_command(ps2dev, NULL, cmd) ||
1769             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1770                 return -1;
1771
1772         /* we may get 3 more bytes, just ignore them */
1773         ps2_drain(ps2dev, 3, 100);
1774
1775         return 0;
1776 }
1777
1778 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1779 {
1780         struct ps2dev *ps2dev = &psmouse->ps2dev;
1781
1782         /* Try ALPS magic knock - 4 disable before enable */
1783         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1784             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1785             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1786             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1787             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1788                 return -1;
1789
1790         /*
1791          * Switch mouse to poll (remote) mode so motion data will not
1792          * get in our way
1793          */
1794         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1795 }
1796
1797 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1798 {
1799         int i, nibble;
1800
1801         /*
1802          * b0-b11 are valid bits, send sequence is inverse.
1803          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1804          */
1805         for (i = 0; i <= 8; i += 4) {
1806                 nibble = (word >> i) & 0xf;
1807                 if (alps_command_mode_send_nibble(psmouse, nibble))
1808                         return -1;
1809         }
1810
1811         return 0;
1812 }
1813
1814 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1815                                        u16 addr, u16 value)
1816 {
1817         struct ps2dev *ps2dev = &psmouse->ps2dev;
1818
1819         /* 0x0A0 is the command to write the word */
1820         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1821             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1822             alps_monitor_mode_send_word(psmouse, addr) ||
1823             alps_monitor_mode_send_word(psmouse, value) ||
1824             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1825                 return -1;
1826
1827         return 0;
1828 }
1829
1830 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1831 {
1832         struct ps2dev *ps2dev = &psmouse->ps2dev;
1833
1834         if (enable) {
1835                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1836                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1837                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1838                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1839                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1840                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1841                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1842                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1843                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1844                         return -1;
1845         } else {
1846                 /* EC to exit monitor mode */
1847                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1848                         return -1;
1849         }
1850
1851         return 0;
1852 }
1853
1854 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1855 {
1856         u16 reg_val = 0x181;
1857         int ret = -1;
1858
1859         /* enter monitor mode, to write the register */
1860         if (alps_monitor_mode(psmouse, true))
1861                 return -1;
1862
1863         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1864
1865         if (alps_monitor_mode(psmouse, false))
1866                 ret = -1;
1867
1868         return ret;
1869 }
1870
1871 static int alps_get_status(struct psmouse *psmouse, char *param)
1872 {
1873         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1874         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1875                 return -1;
1876
1877         return 0;
1878 }
1879
1880 /*
1881  * Turn touchpad tapping on or off. The sequences are:
1882  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1883  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1884  * My guess that 0xE9 (GetInfo) is here as a sync point.
1885  * For models that also have stickpointer (DualPoints) its tapping
1886  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1887  * we don't fiddle with it.
1888  */
1889 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1890 {
1891         struct ps2dev *ps2dev = &psmouse->ps2dev;
1892         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1893         unsigned char tap_arg = enable ? 0x0A : 0x00;
1894         unsigned char param[4];
1895
1896         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1897             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1898             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1899             ps2_command(ps2dev, &tap_arg, cmd))
1900                 return -1;
1901
1902         if (alps_get_status(psmouse, param))
1903                 return -1;
1904
1905         return 0;
1906 }
1907
1908 /*
1909  * alps_poll() - poll the touchpad for current motion packet.
1910  * Used in resync.
1911  */
1912 static int alps_poll(struct psmouse *psmouse)
1913 {
1914         struct alps_data *priv = psmouse->private;
1915         unsigned char buf[sizeof(psmouse->packet)];
1916         bool poll_failed;
1917
1918         if (priv->flags & ALPS_PASS)
1919                 alps_passthrough_mode_v2(psmouse, true);
1920
1921         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1922                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1923
1924         if (priv->flags & ALPS_PASS)
1925                 alps_passthrough_mode_v2(psmouse, false);
1926
1927         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1928                 return -1;
1929
1930         if ((psmouse->badbyte & 0xc8) == 0x08) {
1931 /*
1932  * Poll the track stick ...
1933  */
1934                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1935                         return -1;
1936         }
1937
1938         memcpy(psmouse->packet, buf, sizeof(buf));
1939         return 0;
1940 }
1941
1942 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1943 {
1944         struct alps_data *priv = psmouse->private;
1945
1946         if ((priv->flags & ALPS_PASS) &&
1947             alps_passthrough_mode_v2(psmouse, true)) {
1948                 return -1;
1949         }
1950
1951         if (alps_tap_mode(psmouse, true)) {
1952                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1953                 return -1;
1954         }
1955
1956         if (alps_absolute_mode_v1_v2(psmouse)) {
1957                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1958                 return -1;
1959         }
1960
1961         if ((priv->flags & ALPS_PASS) &&
1962             alps_passthrough_mode_v2(psmouse, false)) {
1963                 return -1;
1964         }
1965
1966         /* ALPS needs stream mode, otherwise it won't report any data */
1967         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1968                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1969                 return -1;
1970         }
1971
1972         return 0;
1973 }
1974
1975 static int alps_hw_init_v6(struct psmouse *psmouse)
1976 {
1977         unsigned char param[2] = {0xC8, 0x14};
1978
1979         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1980         if (alps_passthrough_mode_v2(psmouse, true))
1981                 return -1;
1982
1983         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1984             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1985             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1986             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1987             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1988                 return -1;
1989
1990         if (alps_passthrough_mode_v2(psmouse, false))
1991                 return -1;
1992
1993         if (alps_absolute_mode_v6(psmouse)) {
1994                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1995                 return -1;
1996         }
1997
1998         return 0;
1999 }
2000
2001 /*
2002  * Enable or disable passthrough mode to the trackstick.
2003  */
2004 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
2005                                     int reg_base, bool enable)
2006 {
2007         int reg_val, ret = -1;
2008
2009         if (alps_enter_command_mode(psmouse))
2010                 return -1;
2011
2012         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
2013         if (reg_val == -1)
2014                 goto error;
2015
2016         if (enable)
2017                 reg_val |= 0x01;
2018         else
2019                 reg_val &= ~0x01;
2020
2021         ret = __alps_command_mode_write_reg(psmouse, reg_val);
2022
2023 error:
2024         if (alps_exit_command_mode(psmouse))
2025                 ret = -1;
2026         return ret;
2027 }
2028
2029 /* Must be in command mode when calling this function */
2030 static int alps_absolute_mode_v3(struct psmouse *psmouse)
2031 {
2032         int reg_val;
2033
2034         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2035         if (reg_val == -1)
2036                 return -1;
2037
2038         reg_val |= 0x06;
2039         if (__alps_command_mode_write_reg(psmouse, reg_val))
2040                 return -1;
2041
2042         return 0;
2043 }
2044
2045 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
2046 {
2047         int ret = -EIO, reg_val;
2048
2049         if (alps_enter_command_mode(psmouse))
2050                 goto error;
2051
2052         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2053         if (reg_val == -1)
2054                 goto error;
2055
2056         /* bit 7: trackstick is present */
2057         ret = reg_val & 0x80 ? 0 : -ENODEV;
2058
2059 error:
2060         alps_exit_command_mode(psmouse);
2061         return ret;
2062 }
2063
2064 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2065 {
2066         struct ps2dev *ps2dev = &psmouse->ps2dev;
2067         int ret = 0;
2068         unsigned char param[4];
2069
2070         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2071                 return -EIO;
2072
2073         /*
2074          * E7 report for the trackstick
2075          *
2076          * There have been reports of failures to seem to trace back
2077          * to the above trackstick check failing. When these occur
2078          * this E7 report fails, so when that happens we continue
2079          * with the assumption that there isn't a trackstick after
2080          * all.
2081          */
2082         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2083                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2084                 ret = -ENODEV;
2085         } else {
2086                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2087
2088                 /*
2089                  * Not sure what this does, but it is absolutely
2090                  * essential. Without it, the touchpad does not
2091                  * work at all and the trackstick just emits normal
2092                  * PS/2 packets.
2093                  */
2094                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2095                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2096                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2097                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2098                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2099                         psmouse_err(psmouse,
2100                                     "Error sending magic E6 sequence\n");
2101                         ret = -EIO;
2102                         goto error;
2103                 }
2104
2105                 /*
2106                  * This ensures the trackstick packets are in the format
2107                  * supported by this driver. If bit 1 isn't set the packet
2108                  * format is different.
2109                  */
2110                 if (alps_enter_command_mode(psmouse) ||
2111                     alps_command_mode_write_reg(psmouse,
2112                                                 reg_base + 0x08, 0x82) ||
2113                     alps_exit_command_mode(psmouse))
2114                         ret = -EIO;
2115         }
2116
2117 error:
2118         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2119                 ret = -EIO;
2120
2121         return ret;
2122 }
2123
2124 static int alps_hw_init_v3(struct psmouse *psmouse)
2125 {
2126         struct ps2dev *ps2dev = &psmouse->ps2dev;
2127         int reg_val;
2128         unsigned char param[4];
2129
2130         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
2131         if (reg_val == -EIO)
2132                 goto error;
2133
2134         if (reg_val == 0 &&
2135             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2136                 goto error;
2137
2138         if (alps_enter_command_mode(psmouse) ||
2139             alps_absolute_mode_v3(psmouse)) {
2140                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2141                 goto error;
2142         }
2143
2144         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2145         if (reg_val == -1)
2146                 goto error;
2147         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2148                 goto error;
2149
2150         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2151         if (reg_val == -1)
2152                 goto error;
2153         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2154                 goto error;
2155
2156         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2157                 goto error;
2158         if (__alps_command_mode_write_reg(psmouse, 0x04))
2159                 goto error;
2160
2161         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2162                 goto error;
2163         if (__alps_command_mode_write_reg(psmouse, 0x03))
2164                 goto error;
2165
2166         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2167                 goto error;
2168         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2169                 goto error;
2170
2171         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2172                 goto error;
2173         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2174                 goto error;
2175
2176         alps_exit_command_mode(psmouse);
2177
2178         /* Set rate and enable data reporting */
2179         param[0] = 0x64;
2180         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2181             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2182                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2183                 return -1;
2184         }
2185
2186         return 0;
2187
2188 error:
2189         /*
2190          * Leaving the touchpad in command mode will essentially render
2191          * it unusable until the machine reboots, so exit it here just
2192          * to be safe
2193          */
2194         alps_exit_command_mode(psmouse);
2195         return -1;
2196 }
2197
2198 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2199 {
2200         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2201         struct alps_data *priv = psmouse->private;
2202
2203         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2204         if (reg < 0)
2205                 return reg;
2206
2207         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2208         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2209
2210         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2211         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2212
2213         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2214         if (reg < 0)
2215                 return reg;
2216
2217         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2218         x_electrode = 17 + x_electrode;
2219
2220         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2221         y_electrode = 13 + y_electrode;
2222
2223         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2224         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2225
2226         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2227         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2228
2229         psmouse_dbg(psmouse,
2230                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2231                     x_pitch, y_pitch, x_electrode, y_electrode,
2232                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2233
2234         return 0;
2235 }
2236
2237 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2238 {
2239         struct alps_data *priv = psmouse->private;
2240         struct ps2dev *ps2dev = &psmouse->ps2dev;
2241         int reg_val, ret = -1;
2242
2243         if (priv->flags & ALPS_DUALPOINT) {
2244                 reg_val = alps_setup_trackstick_v3(psmouse,
2245                                                    ALPS_REG_BASE_RUSHMORE);
2246                 if (reg_val == -EIO)
2247                         goto error;
2248         }
2249
2250         if (alps_enter_command_mode(psmouse) ||
2251             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2252             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2253                 goto error;
2254
2255         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2256                 goto error;
2257
2258         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2259         if (reg_val == -1)
2260                 goto error;
2261         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2262                 goto error;
2263
2264         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2265                 goto error;
2266
2267         /* enter absolute mode */
2268         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2269         if (reg_val == -1)
2270                 goto error;
2271         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2272                 goto error;
2273
2274         alps_exit_command_mode(psmouse);
2275         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2276
2277 error:
2278         alps_exit_command_mode(psmouse);
2279         return ret;
2280 }
2281
2282 /* Must be in command mode when calling this function */
2283 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2284 {
2285         int reg_val;
2286
2287         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2288         if (reg_val == -1)
2289                 return -1;
2290
2291         reg_val |= 0x02;
2292         if (__alps_command_mode_write_reg(psmouse, reg_val))
2293                 return -1;
2294
2295         return 0;
2296 }
2297
2298 static int alps_hw_init_v4(struct psmouse *psmouse)
2299 {
2300         struct ps2dev *ps2dev = &psmouse->ps2dev;
2301         unsigned char param[4];
2302
2303         if (alps_enter_command_mode(psmouse))
2304                 goto error;
2305
2306         if (alps_absolute_mode_v4(psmouse)) {
2307                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2308                 goto error;
2309         }
2310
2311         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2312                 goto error;
2313
2314         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2315                 goto error;
2316
2317         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2318                 goto error;
2319
2320         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2321                 goto error;
2322
2323         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2324                 goto error;
2325
2326         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2327                 goto error;
2328
2329         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2330                 goto error;
2331
2332         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2333                 goto error;
2334
2335         alps_exit_command_mode(psmouse);
2336
2337         /*
2338          * This sequence changes the output from a 9-byte to an
2339          * 8-byte format. All the same data seems to be present,
2340          * just in a more compact format.
2341          */
2342         param[0] = 0xc8;
2343         param[1] = 0x64;
2344         param[2] = 0x50;
2345         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2346             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2347             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2348             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2349                 return -1;
2350
2351         /* Set rate and enable data reporting */
2352         param[0] = 0x64;
2353         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2354             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2355                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2356                 return -1;
2357         }
2358
2359         return 0;
2360
2361 error:
2362         /*
2363          * Leaving the touchpad in command mode will essentially render
2364          * it unusable until the machine reboots, so exit it here just
2365          * to be safe
2366          */
2367         alps_exit_command_mode(psmouse);
2368         return -1;
2369 }
2370
2371 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2372                                       unsigned char index, unsigned char otp[])
2373 {
2374         struct ps2dev *ps2dev = &psmouse->ps2dev;
2375
2376         switch (index) {
2377         case 0:
2378                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2379                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2380                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2381                         return -1;
2382
2383                 break;
2384
2385         case 1:
2386                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2387                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2388                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2389                         return -1;
2390
2391                 break;
2392         }
2393
2394         return 0;
2395 }
2396
2397 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2398                                           struct alps_data *priv)
2399 {
2400         int num_x_electrode;
2401         int num_y_electrode;
2402         int x_pitch, y_pitch, x_phys, y_phys;
2403
2404         num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2405         num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2406
2407         priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2408         priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2409
2410         x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2411         y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2412
2413         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2414         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2415
2416         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2417         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2418
2419         return 0;
2420 }
2421
2422 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2423                                        struct alps_data *priv)
2424 {
2425         unsigned char is_btnless;
2426
2427         is_btnless = (otp[1][1] >> 3) & 0x01;
2428
2429         if (is_btnless)
2430                 priv->flags |= ALPS_BUTTONPAD;
2431
2432         return 0;
2433 }
2434
2435 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2436                                     struct alps_data *priv)
2437 {
2438         unsigned char otp[2][4];
2439
2440         memset(otp, 0, sizeof(otp));
2441
2442         if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2443             alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2444                 return -1;
2445
2446         alps_update_device_area_ss4_v2(otp, priv);
2447
2448         alps_update_btn_info_ss4_v2(otp, priv);
2449
2450         return 0;
2451 }
2452
2453 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2454                                         struct alps_data *priv)
2455 {
2456         struct ps2dev *ps2dev = &psmouse->ps2dev;
2457         unsigned char param[4] = {0};
2458         int num_x_electrode, num_y_electrode;
2459
2460         if (alps_enter_command_mode(psmouse))
2461                 return -1;
2462
2463         param[0] = 0x0a;
2464         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2465             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2466             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2467             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2468             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2469                 return -1;
2470
2471         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2472                 return -1;
2473
2474         /*
2475          * Dolphin's sensor line number is not fixed. It can be calculated
2476          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2477          * Further more, we can get device's x_max and y_max by multiplying
2478          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2479          *
2480          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2481          *      real sensor line number X = 11 + 8 = 19, and
2482          *      real sensor line number Y = 8 + 1 = 9.
2483          *      So, x_max = (19 - 1) * 64 = 1152, and
2484          *          y_max = (9 - 1) * 64 = 512.
2485          */
2486         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2487         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2488         priv->x_bits = num_x_electrode;
2489         priv->y_bits = num_y_electrode;
2490         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2491         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2492
2493         if (alps_exit_command_mode(psmouse))
2494                 return -1;
2495
2496         return 0;
2497 }
2498
2499 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2500 {
2501         struct ps2dev *ps2dev = &psmouse->ps2dev;
2502         unsigned char param[2];
2503
2504         /* This is dolphin "v1" as empirically defined by florin9doi */
2505         param[0] = 0x64;
2506         param[1] = 0x28;
2507
2508         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2509             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2510             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2511                 return -1;
2512
2513         return 0;
2514 }
2515
2516 static int alps_hw_init_v7(struct psmouse *psmouse)
2517 {
2518         struct ps2dev *ps2dev = &psmouse->ps2dev;
2519         int reg_val, ret = -1;
2520
2521         if (alps_enter_command_mode(psmouse) ||
2522             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2523                 goto error;
2524
2525         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2526                 goto error;
2527
2528         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2529                 goto error;
2530
2531         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2532         if (reg_val == -1)
2533                 goto error;
2534         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2535                 goto error;
2536
2537         alps_exit_command_mode(psmouse);
2538         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2539
2540 error:
2541         alps_exit_command_mode(psmouse);
2542         return ret;
2543 }
2544
2545 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2546 {
2547         struct ps2dev *ps2dev = &psmouse->ps2dev;
2548         char param[2] = {0x64, 0x28};
2549         int ret = -1;
2550
2551         /* enter absolute mode */
2552         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2553             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2554             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2555             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2556                 goto error;
2557         }
2558
2559         /* T.B.D. Decread noise packet number, delete in the future */
2560         if (alps_exit_command_mode(psmouse) ||
2561             alps_enter_command_mode(psmouse) ||
2562             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2563                 goto error;
2564         }
2565         alps_exit_command_mode(psmouse);
2566
2567         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2568
2569 error:
2570         alps_exit_command_mode(psmouse);
2571         return ret;
2572 }
2573
2574 static int alps_set_protocol(struct psmouse *psmouse,
2575                              struct alps_data *priv,
2576                              const struct alps_protocol_info *protocol)
2577 {
2578         psmouse->private = priv;
2579
2580         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2581
2582         priv->proto_version = protocol->version;
2583         priv->byte0 = protocol->byte0;
2584         priv->mask0 = protocol->mask0;
2585         priv->flags = protocol->flags;
2586
2587         priv->x_max = 2000;
2588         priv->y_max = 1400;
2589         priv->x_bits = 15;
2590         priv->y_bits = 11;
2591
2592         switch (priv->proto_version) {
2593         case ALPS_PROTO_V1:
2594         case ALPS_PROTO_V2:
2595                 priv->hw_init = alps_hw_init_v1_v2;
2596                 priv->process_packet = alps_process_packet_v1_v2;
2597                 priv->set_abs_params = alps_set_abs_params_st;
2598                 priv->x_max = 1023;
2599                 priv->y_max = 767;
2600                 break;
2601
2602         case ALPS_PROTO_V3:
2603                 priv->hw_init = alps_hw_init_v3;
2604                 priv->process_packet = alps_process_packet_v3;
2605                 priv->set_abs_params = alps_set_abs_params_mt;
2606                 priv->decode_fields = alps_decode_pinnacle;
2607                 priv->nibble_commands = alps_v3_nibble_commands;
2608                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2609                 break;
2610
2611         case ALPS_PROTO_V3_RUSHMORE:
2612                 priv->hw_init = alps_hw_init_rushmore_v3;
2613                 priv->process_packet = alps_process_packet_v3;
2614                 priv->set_abs_params = alps_set_abs_params_mt;
2615                 priv->decode_fields = alps_decode_rushmore;
2616                 priv->nibble_commands = alps_v3_nibble_commands;
2617                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2618                 priv->x_bits = 16;
2619                 priv->y_bits = 12;
2620
2621                 if (alps_probe_trackstick_v3(psmouse,
2622                                              ALPS_REG_BASE_RUSHMORE) < 0)
2623                         priv->flags &= ~ALPS_DUALPOINT;
2624
2625                 break;
2626
2627         case ALPS_PROTO_V4:
2628                 priv->hw_init = alps_hw_init_v4;
2629                 priv->process_packet = alps_process_packet_v4;
2630                 priv->set_abs_params = alps_set_abs_params_mt;
2631                 priv->nibble_commands = alps_v4_nibble_commands;
2632                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2633                 break;
2634
2635         case ALPS_PROTO_V5:
2636                 priv->hw_init = alps_hw_init_dolphin_v1;
2637                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2638                 priv->decode_fields = alps_decode_dolphin;
2639                 priv->set_abs_params = alps_set_abs_params_mt;
2640                 priv->nibble_commands = alps_v3_nibble_commands;
2641                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2642                 priv->x_bits = 23;
2643                 priv->y_bits = 12;
2644
2645                 if (alps_dolphin_get_device_area(psmouse, priv))
2646                         return -EIO;
2647
2648                 break;
2649
2650         case ALPS_PROTO_V6:
2651                 priv->hw_init = alps_hw_init_v6;
2652                 priv->process_packet = alps_process_packet_v6;
2653                 priv->set_abs_params = alps_set_abs_params_st;
2654                 priv->nibble_commands = alps_v6_nibble_commands;
2655                 priv->x_max = 2047;
2656                 priv->y_max = 1535;
2657                 break;
2658
2659         case ALPS_PROTO_V7:
2660                 priv->hw_init = alps_hw_init_v7;
2661                 priv->process_packet = alps_process_packet_v7;
2662                 priv->decode_fields = alps_decode_packet_v7;
2663                 priv->set_abs_params = alps_set_abs_params_v7;
2664                 priv->nibble_commands = alps_v3_nibble_commands;
2665                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2666                 priv->x_max = 0xfff;
2667                 priv->y_max = 0x7ff;
2668
2669                 if (priv->fw_ver[1] != 0xba)
2670                         priv->flags |= ALPS_BUTTONPAD;
2671
2672                 break;
2673
2674         case ALPS_PROTO_V8:
2675                 priv->hw_init = alps_hw_init_ss4_v2;
2676                 priv->process_packet = alps_process_packet_ss4_v2;
2677                 priv->decode_fields = alps_decode_ss4_v2;
2678                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2679                 priv->nibble_commands = alps_v3_nibble_commands;
2680                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2681
2682                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2683                         return -EIO;
2684
2685                 break;
2686         }
2687
2688         return 0;
2689 }
2690
2691 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2692                                                          unsigned char *ec)
2693 {
2694         const struct alps_model_info *model;
2695         int i;
2696
2697         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2698                 model = &alps_model_data[i];
2699
2700                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2701                     (!model->command_mode_resp ||
2702                      model->command_mode_resp == ec[2])) {
2703
2704                         return &model->protocol_info;
2705                 }
2706         }
2707
2708         return NULL;
2709 }
2710
2711 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2712 {
2713         const struct alps_protocol_info *protocol;
2714         unsigned char e6[4], e7[4], ec[4];
2715         int error;
2716
2717         /*
2718          * First try "E6 report".
2719          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2720          * The bits 0-2 of the first byte will be 1s if some buttons are
2721          * pressed.
2722          */
2723         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2724                          PSMOUSE_CMD_SETSCALE11, e6))
2725                 return -EIO;
2726
2727         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2728                 return -EINVAL;
2729
2730         /*
2731          * Now get the "E7" and "EC" reports.  These will uniquely identify
2732          * most ALPS touchpads.
2733          */
2734         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2735                          PSMOUSE_CMD_SETSCALE21, e7) ||
2736             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2737                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2738             alps_exit_command_mode(psmouse))
2739                 return -EIO;
2740
2741         protocol = alps_match_table(e7, ec);
2742         if (!protocol) {
2743                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2744                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2745                         protocol = &alps_v5_protocol_data;
2746                 } else if (ec[0] == 0x88 &&
2747                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2748                         protocol = &alps_v7_protocol_data;
2749                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2750                         protocol = &alps_v3_rushmore_data;
2751                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2752                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2753                         protocol = &alps_v3_protocol_data;
2754                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2755                            e7[2] == 0x14 && ec[1] == 0x02) {
2756                         protocol = &alps_v8_protocol_data;
2757                 } else {
2758                         psmouse_dbg(psmouse,
2759                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2760                         return -EINVAL;
2761                 }
2762         }
2763
2764         if (priv) {
2765                 /* Save the Firmware version */
2766                 memcpy(priv->fw_ver, ec, 3);
2767                 error = alps_set_protocol(psmouse, priv, protocol);
2768                 if (error)
2769                         return error;
2770         }
2771
2772         return 0;
2773 }
2774
2775 static int alps_reconnect(struct psmouse *psmouse)
2776 {
2777         struct alps_data *priv = psmouse->private;
2778
2779         psmouse_reset(psmouse);
2780
2781         if (alps_identify(psmouse, priv) < 0)
2782                 return -1;
2783
2784         return priv->hw_init(psmouse);
2785 }
2786
2787 static void alps_disconnect(struct psmouse *psmouse)
2788 {
2789         struct alps_data *priv = psmouse->private;
2790
2791         psmouse_reset(psmouse);
2792         del_timer_sync(&priv->timer);
2793         if (priv->dev2)
2794                 input_unregister_device(priv->dev2);
2795         if (!IS_ERR_OR_NULL(priv->dev3))
2796                 input_unregister_device(priv->dev3);
2797         kfree(priv);
2798 }
2799
2800 static void alps_set_abs_params_st(struct alps_data *priv,
2801                                    struct input_dev *dev1)
2802 {
2803         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2804         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2805         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2806 }
2807
2808 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2809                                           struct input_dev *dev1)
2810 {
2811         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2812         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2813
2814         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2815         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2816
2817         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2818         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2819 }
2820
2821 static void alps_set_abs_params_mt(struct alps_data *priv,
2822                                    struct input_dev *dev1)
2823 {
2824         alps_set_abs_params_mt_common(priv, dev1);
2825         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2826
2827         input_mt_init_slots(dev1, MAX_TOUCHES,
2828                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2829                                 INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2830 }
2831
2832 static void alps_set_abs_params_v7(struct alps_data *priv,
2833                                    struct input_dev *dev1)
2834 {
2835         alps_set_abs_params_mt_common(priv, dev1);
2836         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2837
2838         input_mt_init_slots(dev1, MAX_TOUCHES,
2839                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2840                                 INPUT_MT_TRACK);
2841
2842         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2843 }
2844
2845 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2846                                        struct input_dev *dev1)
2847 {
2848         alps_set_abs_params_mt_common(priv, dev1);
2849         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2850         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2851
2852         input_mt_init_slots(dev1, MAX_TOUCHES,
2853                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2854                                 INPUT_MT_TRACK);
2855 }
2856
2857 int alps_init(struct psmouse *psmouse)
2858 {
2859         struct alps_data *priv = psmouse->private;
2860         struct input_dev *dev1 = psmouse->dev;
2861         int error;
2862
2863         error = priv->hw_init(psmouse);
2864         if (error)
2865                 goto init_fail;
2866
2867         /*
2868          * Undo part of setup done for us by psmouse core since touchpad
2869          * is not a relative device.
2870          */
2871         __clear_bit(EV_REL, dev1->evbit);
2872         __clear_bit(REL_X, dev1->relbit);
2873         __clear_bit(REL_Y, dev1->relbit);
2874
2875         /*
2876          * Now set up our capabilities.
2877          */
2878         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2879         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2880         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2881         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2882                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2883
2884         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2885
2886         priv->set_abs_params(priv, dev1);
2887
2888         if (priv->flags & ALPS_WHEEL) {
2889                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2890                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2891         }
2892
2893         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2894                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2895                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2896         }
2897
2898         if (priv->flags & ALPS_FOUR_BUTTONS) {
2899                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2900                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2901                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2902                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2903         } else if (priv->flags & ALPS_BUTTONPAD) {
2904                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2905                 clear_bit(BTN_RIGHT, dev1->keybit);
2906         } else {
2907                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2908         }
2909
2910         if (priv->flags & ALPS_DUALPOINT) {
2911                 struct input_dev *dev2;
2912
2913                 dev2 = input_allocate_device();
2914                 if (!dev2) {
2915                         psmouse_err(psmouse,
2916                                     "failed to allocate trackstick device\n");
2917                         error = -ENOMEM;
2918                         goto init_fail;
2919                 }
2920
2921                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2922                          psmouse->ps2dev.serio->phys);
2923                 dev2->phys = priv->phys2;
2924
2925                 /*
2926                  * format of input device name is: "protocol vendor name"
2927                  * see function psmouse_switch_protocol() in psmouse-base.c
2928                  */
2929                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2930
2931                 dev2->id.bustype = BUS_I8042;
2932                 dev2->id.vendor  = 0x0002;
2933                 dev2->id.product = PSMOUSE_ALPS;
2934                 dev2->id.version = priv->proto_version;
2935                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2936
2937                 input_set_capability(dev2, EV_REL, REL_X);
2938                 input_set_capability(dev2, EV_REL, REL_Y);
2939                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2940                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2941                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2942
2943                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2944                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2945
2946                 error = input_register_device(dev2);
2947                 if (error) {
2948                         psmouse_err(psmouse,
2949                                     "failed to register trackstick device: %d\n",
2950                                     error);
2951                         input_free_device(dev2);
2952                         goto init_fail;
2953                 }
2954
2955                 priv->dev2 = dev2;
2956         }
2957
2958         priv->psmouse = psmouse;
2959
2960         INIT_DELAYED_WORK(&priv->dev3_register_work,
2961                           alps_register_bare_ps2_mouse);
2962
2963         psmouse->protocol_handler = alps_process_byte;
2964         psmouse->poll = alps_poll;
2965         psmouse->disconnect = alps_disconnect;
2966         psmouse->reconnect = alps_reconnect;
2967         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2968
2969         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2970         psmouse->resync_time = 0;
2971
2972         /* Allow 2 invalid packets without resetting device */
2973         psmouse->resetafter = psmouse->pktsize * 2;
2974
2975         return 0;
2976
2977 init_fail:
2978         psmouse_reset(psmouse);
2979         /*
2980          * Even though we did not allocate psmouse->private we do free
2981          * it here.
2982          */
2983         kfree(psmouse->private);
2984         psmouse->private = NULL;
2985         return error;
2986 }
2987
2988 int alps_detect(struct psmouse *psmouse, bool set_properties)
2989 {
2990         struct alps_data *priv;
2991         int error;
2992
2993         error = alps_identify(psmouse, NULL);
2994         if (error)
2995                 return error;
2996
2997         /*
2998          * Reset the device to make sure it is fully operational:
2999          * on some laptops, like certain Dell Latitudes, we may
3000          * fail to properly detect presence of trackstick if device
3001          * has not been reset.
3002          */
3003         psmouse_reset(psmouse);
3004
3005         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
3006         if (!priv)
3007                 return -ENOMEM;
3008
3009         error = alps_identify(psmouse, priv);
3010         if (error) {
3011                 kfree(priv);
3012                 return error;
3013         }
3014
3015         if (set_properties) {
3016                 psmouse->vendor = "ALPS";
3017                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
3018                                 "DualPoint TouchPad" : "GlidePoint";
3019                 psmouse->model = priv->proto_version;
3020         } else {
3021                 /*
3022                  * Destroy alps_data structure we allocated earlier since
3023                  * this was just a "trial run". Otherwise we'll keep it
3024                  * to be used by alps_init() which has to be called if
3025                  * we succeed and set_properties is true.
3026                  */
3027                 kfree(priv);
3028                 psmouse->private = NULL;
3029         }
3030
3031         return 0;
3032 }
3033