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         /* Non interleaved V2 dualpoint has separate stick button bits */
 255         if (priv->proto_version == ALPS_PROTO_V2 &&
 256             priv->flags == (ALPS_PASS | ALPS_DUALPOINT)) {
 257                 left |= packet[0] & 1;
 258                 right |= packet[0] & 2;
 259                 middle |= packet[0] & 4;
 260         }
 261
 262         alps_report_buttons(dev, dev2, left, right, middle);
 263
 264         /* Convert hardware tap to a reasonable Z value */
 265         if (ges && !fin)
 266                 z = 40;
 267
 268         /*
 269          * A "tap and drag" operation is reported by the hardware as a transition
 270          * from (!fin && ges) to (fin && ges). This should be translated to the
 271          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 272          */
 273         if (ges && fin && !priv->prev_fin) {
 274                 input_report_abs(dev, ABS_X, x);
 275                 input_report_abs(dev, ABS_Y, y);
 276                 input_report_abs(dev, ABS_PRESSURE, 0);
 277                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 278                 input_sync(dev);
 279         }
 280         priv->prev_fin = fin;
 281
 282         if (z > 30)
 283                 input_report_key(dev, BTN_TOUCH, 1);
 284         if (z < 25)
 285                 input_report_key(dev, BTN_TOUCH, 0);
 286
 287         if (z > 0) {
 288                 input_report_abs(dev, ABS_X, x);
 289                 input_report_abs(dev, ABS_Y, y);
 290         }
 291
 292         input_report_abs(dev, ABS_PRESSURE, z);
 293         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 294
 295         if (priv->flags & ALPS_WHEEL)
 296                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 297
 298         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 299                 input_report_key(dev, BTN_FORWARD, forward);
 300                 input_report_key(dev, BTN_BACK, back);
 301         }
 302
 303         if (priv->flags & ALPS_FOUR_BUTTONS) {
 304                 input_report_key(dev, BTN_0, packet[2] & 4);
 305                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 306                 input_report_key(dev, BTN_2, packet[3] & 4);
 307                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 308         }
 309
 310         input_sync(dev);
 311 }
 312
 313 /*
 314  * Process bitmap data for V5 protocols. Return value is null.
 315  *
 316  * The bitmaps don't have enough data to track fingers, so this function
 317  * only generates points representing a bounding box of at most two contacts.
 318  * These two points are returned in fields->mt.
 319  */
 320 static void alps_process_bitmap_dolphin(struct alps_data *priv,
 321                                         struct alps_fields *fields)
 322 {
 323         int box_middle_x, box_middle_y;
 324         unsigned int x_map, y_map;
 325         unsigned char start_bit, end_bit;
 326         unsigned char x_msb, x_lsb, y_msb, y_lsb;
 327
 328         x_map = fields->x_map;
 329         y_map = fields->y_map;
 330
 331         if (!x_map || !y_map)
 332                 return;
 333
 334         /* Get Most-significant and Least-significant bit */
 335         x_msb = fls(x_map);
 336         x_lsb = ffs(x_map);
 337         y_msb = fls(y_map);
 338         y_lsb = ffs(y_map);
 339
 340         /* Most-significant bit should never exceed max sensor line number */
 341         if (x_msb > priv->x_bits || y_msb > priv->y_bits)
 342                 return;
 343
 344         if (fields->fingers > 1) {
 345                 start_bit = priv->x_bits - x_msb;
 346                 end_bit = priv->x_bits - x_lsb;
 347                 box_middle_x = (priv->x_max * (start_bit + end_bit)) /
 348                                 (2 * (priv->x_bits - 1));
 349
 350                 start_bit = y_lsb - 1;
 351                 end_bit = y_msb - 1;
 352                 box_middle_y = (priv->y_max * (start_bit + end_bit)) /
 353                                 (2 * (priv->y_bits - 1));
 354                 fields->mt[0] = fields->st;
 355                 fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
 356                 fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
 357         }
 358 }
 359
 360 static void alps_get_bitmap_points(unsigned int map,
 361                                    struct alps_bitmap_point *low,
 362                                    struct alps_bitmap_point *high,
 363                                    int *fingers)
 364 {
 365         struct alps_bitmap_point *point;
 366         int i, bit, prev_bit = 0;
 367
 368         point = low;
 369         for (i = 0; map != 0; i++, map >>= 1) {
 370                 bit = map & 1;
 371                 if (bit) {
 372                         if (!prev_bit) {
 373                                 point->start_bit = i;
 374                                 point->num_bits = 0;
 375                                 (*fingers)++;
 376                         }
 377                         point->num_bits++;
 378                 } else {
 379                         if (prev_bit)
 380                                 point = high;
 381                 }
 382                 prev_bit = bit;
 383         }
 384 }
 385
 386 /*
 387  * Process bitmap data from v3 and v4 protocols. Returns the number of
 388  * fingers detected. A return value of 0 means at least one of the
 389  * bitmaps was empty.
 390  *
 391  * The bitmaps don't have enough data to track fingers, so this function
 392  * only generates points representing a bounding box of all contacts.
 393  * These points are returned in fields->mt when the return value
 394  * is greater than 0.
 395  */
 396 static int alps_process_bitmap(struct alps_data *priv,
 397                                struct alps_fields *fields)
 398 {
 399         int i, fingers_x = 0, fingers_y = 0, fingers;
 400         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 401         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 402
 403         if (!fields->x_map || !fields->y_map)
 404                 return 0;
 405
 406         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
 407         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
 408
 409         /*
 410          * Fingers can overlap, so we use the maximum count of fingers
 411          * on either axis as the finger count.
 412          */
 413         fingers = max(fingers_x, fingers_y);
 414
 415         /*
 416          * If an axis reports only a single contact, we have overlapping or
 417          * adjacent fingers. Divide the single contact between the two points.
 418          */
 419         if (fingers_x == 1) {
 420                 i = (x_low.num_bits - 1) / 2;
 421                 x_low.num_bits = x_low.num_bits - i;
 422                 x_high.start_bit = x_low.start_bit + i;
 423                 x_high.num_bits = max(i, 1);
 424         }
 425         if (fingers_y == 1) {
 426                 i = (y_low.num_bits - 1) / 2;
 427                 y_low.num_bits = y_low.num_bits - i;
 428                 y_high.start_bit = y_low.start_bit + i;
 429                 y_high.num_bits = max(i, 1);
 430         }
 431
 432         fields->mt[0].x =
 433                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 434                 (2 * (priv->x_bits - 1));
 435         fields->mt[0].y =
 436                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 437                 (2 * (priv->y_bits - 1));
 438
 439         fields->mt[1].x =
 440                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 441                 (2 * (priv->x_bits - 1));
 442         fields->mt[1].y =
 443                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 444                 (2 * (priv->y_bits - 1));
 445
 446         /* y-bitmap order is reversed, except on rushmore */
 447         if (priv->proto_version != ALPS_PROTO_V3_RUSHMORE) {
 448                 fields->mt[0].y = priv->y_max - fields->mt[0].y;
 449                 fields->mt[1].y = priv->y_max - fields->mt[1].y;
 450         }
 451
 452         return fingers;
 453 }
 454
 455 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
 456 {
 457         input_mt_slot(dev, slot);
 458         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 459         input_report_abs(dev, ABS_MT_POSITION_X, x);
 460         input_report_abs(dev, ABS_MT_POSITION_Y, y);
 461 }
 462
 463 static void alps_report_mt_data(struct psmouse *psmouse, int n)
 464 {
 465         struct alps_data *priv = psmouse->private;
 466         struct input_dev *dev = psmouse->dev;
 467         struct alps_fields *f = &priv->f;
 468         int i, slot[MAX_TOUCHES];
 469
 470         input_mt_assign_slots(dev, slot, f->mt, n, 0);
 471         for (i = 0; i < n; i++)
 472                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
 473
 474         input_mt_sync_frame(dev);
 475 }
 476
 477 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
 478 {
 479         struct alps_data *priv = psmouse->private;
 480         struct input_dev *dev = psmouse->dev;
 481         struct alps_fields *f = &priv->f;
 482
 483         /* Use st data when we don't have mt data */
 484         if (fingers < 2) {
 485                 f->mt[0].x = f->st.x;
 486                 f->mt[0].y = f->st.y;
 487                 fingers = f->pressure > 0 ? 1 : 0;
 488         }
 489
 490         alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
 491
 492         input_mt_report_finger_count(dev, fingers);
 493
 494         input_report_key(dev, BTN_LEFT, f->left);
 495         input_report_key(dev, BTN_RIGHT, f->right);
 496         input_report_key(dev, BTN_MIDDLE, f->middle);
 497
 498         input_report_abs(dev, ABS_PRESSURE, f->pressure);
 499
 500         input_sync(dev);
 501 }
 502
 503 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 504 {
 505         struct alps_data *priv = psmouse->private;
 506         unsigned char *packet = psmouse->packet;
 507         struct input_dev *dev = priv->dev2;
 508         int x, y, z, left, right, middle;
 509
 510         /* It should be a DualPoint when received trackstick packet */
 511         if (!(priv->flags & ALPS_DUALPOINT)) {
 512                 psmouse_warn(psmouse,
 513                              "Rejected trackstick packet from non DualPoint device");
 514                 return;
 515         }
 516
 517         /* Sanity check packet */
 518         if (!(packet[0] & 0x40)) {
 519                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 520                 return;
 521         }
 522
 523         /*
 524          * There's a special packet that seems to indicate the end
 525          * of a stream of trackstick data. Filter these out.
 526          */
 527         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 528                 return;
 529
 530         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 531         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 532         z = (packet[4] & 0x7c) >> 2;
 533
 534         /*
 535          * The x and y values tend to be quite large, and when used
 536          * alone the trackstick is difficult to use. Scale them down
 537          * to compensate.
 538          */
 539         x /= 8;
 540         y /= 8;
 541
 542         input_report_rel(dev, REL_X, x);
 543         input_report_rel(dev, REL_Y, -y);
 544
 545         /*
 546          * Most ALPS models report the trackstick buttons in the touchpad
 547          * packets, but a few report them here. No reliable way has been
 548          * found to differentiate between the models upfront, so we enable
 549          * the quirk in response to seeing a button press in the trackstick
 550          * packet.
 551          */
 552         left = packet[3] & 0x01;
 553         right = packet[3] & 0x02;
 554         middle = packet[3] & 0x04;
 555
 556         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 557             (left || right || middle))
 558                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 559
 560         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 561                 input_report_key(dev, BTN_LEFT, left);
 562                 input_report_key(dev, BTN_RIGHT, right);
 563                 input_report_key(dev, BTN_MIDDLE, middle);
 564         }
 565
 566         input_sync(dev);
 567         return;
 568 }
 569
 570 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 571 {
 572         f->left = !!(p[3] & 0x01);
 573         f->right = !!(p[3] & 0x02);
 574         f->middle = !!(p[3] & 0x04);
 575
 576         f->ts_left = !!(p[3] & 0x10);
 577         f->ts_right = !!(p[3] & 0x20);
 578         f->ts_middle = !!(p[3] & 0x40);
 579 }
 580
 581 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 582                                  struct psmouse *psmouse)
 583 {
 584         f->first_mp = !!(p[4] & 0x40);
 585         f->is_mp = !!(p[0] & 0x40);
 586
 587         f->fingers = (p[5] & 0x3) + 1;
 588         f->x_map = ((p[4] & 0x7e) << 8) |
 589                    ((p[1] & 0x7f) << 2) |
 590                    ((p[0] & 0x30) >> 4);
 591         f->y_map = ((p[3] & 0x70) << 4) |
 592                    ((p[2] & 0x7f) << 1) |
 593                    (p[4] & 0x01);
 594
 595         f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 596                ((p[0] & 0x30) >> 4);
 597         f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 598         f->pressure = p[5] & 0x7f;
 599
 600         alps_decode_buttons_v3(f, p);
 601
 602         return 0;
 603 }
 604
 605 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 606                                  struct psmouse *psmouse)
 607 {
 608         alps_decode_pinnacle(f, p, psmouse);
 609
 610         /* Rushmore's packet decode has a bit difference with Pinnacle's */
 611         f->is_mp = !!(p[5] & 0x40);
 612         f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
 613         f->x_map |= (p[5] & 0x10) << 11;
 614         f->y_map |= (p[5] & 0x20) << 6;
 615
 616         return 0;
 617 }
 618
 619 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 620                                 struct psmouse *psmouse)
 621 {
 622         u64 palm_data = 0;
 623         struct alps_data *priv = psmouse->private;
 624
 625         f->first_mp = !!(p[0] & 0x02);
 626         f->is_mp = !!(p[0] & 0x20);
 627
 628         if (!f->is_mp) {
 629                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 630                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 631                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
 632                 alps_decode_buttons_v3(f, p);
 633         } else {
 634                 f->fingers = ((p[0] & 0x6) >> 1 |
 635                      (p[0] & 0x10) >> 2);
 636
 637                 palm_data = (p[1] & 0x7f) |
 638                             ((p[2] & 0x7f) << 7) |
 639                             ((p[4] & 0x7f) << 14) |
 640                             ((p[5] & 0x7f) << 21) |
 641                             ((p[3] & 0x07) << 28) |
 642                             (((u64)p[3] & 0x70) << 27) |
 643                             (((u64)p[0] & 0x01) << 34);
 644
 645                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
 646                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
 647
 648                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
 649                 f->x_map = (palm_data >> priv->y_bits) &
 650                            (BIT(priv->x_bits) - 1);
 651         }
 652
 653         return 0;
 654 }
 655
 656 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 657 {
 658         struct alps_data *priv = psmouse->private;
 659         unsigned char *packet = psmouse->packet;
 660         struct input_dev *dev2 = priv->dev2;
 661         struct alps_fields *f = &priv->f;
 662         int fingers = 0;
 663
 664         memset(f, 0, sizeof(*f));
 665
 666         priv->decode_fields(f, packet, psmouse);
 667
 668         /*
 669          * There's no single feature of touchpad position and bitmap packets
 670          * that can be used to distinguish between them. We rely on the fact
 671          * that a bitmap packet should always follow a position packet with
 672          * bit 6 of packet[4] set.
 673          */
 674         if (priv->multi_packet) {
 675                 /*
 676                  * Sometimes a position packet will indicate a multi-packet
 677                  * sequence, but then what follows is another position
 678                  * packet. Check for this, and when it happens process the
 679                  * position packet as usual.
 680                  */
 681                 if (f->is_mp) {
 682                         fingers = f->fingers;
 683                         if (priv->proto_version == ALPS_PROTO_V3 ||
 684                             priv->proto_version == ALPS_PROTO_V3_RUSHMORE) {
 685                                 if (alps_process_bitmap(priv, f) == 0)
 686                                         fingers = 0; /* Use st data */
 687
 688                                 /* Now process position packet */
 689                                 priv->decode_fields(f, priv->multi_data,
 690                                                     psmouse);
 691                         } else {
 692                                 /*
 693                                  * Because Dolphin uses position packet's
 694                                  * coordinate data as Pt1 and uses it to
 695                                  * calculate Pt2, so we need to do position
 696                                  * packet decode first.
 697                                  */
 698                                 priv->decode_fields(f, priv->multi_data,
 699                                                     psmouse);
 700
 701                                 /*
 702                                  * Since Dolphin's finger number is reliable,
 703                                  * there is no need to compare with bmap_fn.
 704                                  */
 705                                 alps_process_bitmap_dolphin(priv, f);
 706                         }
 707                 } else {
 708                         priv->multi_packet = 0;
 709                 }
 710         }
 711
 712         /*
 713          * Bit 6 of byte 0 is not usually set in position packets. The only
 714          * times it seems to be set is in situations where the data is
 715          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 716          * this combined with the fact that this bit is useful for filtering
 717          * out misidentified bitmap packets, we reject anything with this
 718          * bit set.
 719          */
 720         if (f->is_mp)
 721                 return;
 722
 723         if (!priv->multi_packet && f->first_mp) {
 724                 priv->multi_packet = 1;
 725                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 726                 return;
 727         }
 728
 729         priv->multi_packet = 0;
 730
 731         /*
 732          * Sometimes the hardware sends a single packet with z = 0
 733          * in the middle of a stream. Real releases generate packets
 734          * with x, y, and z all zero, so these seem to be flukes.
 735          * Ignore them.
 736          */
 737         if (f->st.x && f->st.y && !f->pressure)
 738                 return;
 739
 740         alps_report_semi_mt_data(psmouse, fingers);
 741
 742         if ((priv->flags & ALPS_DUALPOINT) &&
 743             !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 744                 input_report_key(dev2, BTN_LEFT, f->ts_left);
 745                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
 746                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
 747                 input_sync(dev2);
 748         }
 749 }
 750
 751 static void alps_process_packet_v3(struct psmouse *psmouse)
 752 {
 753         unsigned char *packet = psmouse->packet;
 754
 755         /*
 756          * v3 protocol packets come in three types, two representing
 757          * touchpad data and one representing trackstick data.
 758          * Trackstick packets seem to be distinguished by always
 759          * having 0x3f in the last byte. This value has never been
 760          * observed in the last byte of either of the other types
 761          * of packets.
 762          */
 763         if (packet[5] == 0x3f) {
 764                 alps_process_trackstick_packet_v3(psmouse);
 765                 return;
 766         }
 767
 768         alps_process_touchpad_packet_v3_v5(psmouse);
 769 }
 770
 771 static void alps_process_packet_v6(struct psmouse *psmouse)
 772 {
 773         struct alps_data *priv = psmouse->private;
 774         unsigned char *packet = psmouse->packet;
 775         struct input_dev *dev = psmouse->dev;
 776         struct input_dev *dev2 = priv->dev2;
 777         int x, y, z, left, right, middle;
 778
 779         /*
 780          * We can use Byte5 to distinguish if the packet is from Touchpad
 781          * or Trackpoint.
 782          * Touchpad:    0 - 0x7E
 783          * Trackpoint:  0x7F
 784          */
 785         if (packet[5] == 0x7F) {
 786                 /* It should be a DualPoint when received Trackpoint packet */
 787                 if (!(priv->flags & ALPS_DUALPOINT)) {
 788                         psmouse_warn(psmouse,
 789                                      "Rejected trackstick packet from non DualPoint device");
 790                         return;
 791                 }
 792
 793                 /* Trackpoint packet */
 794                 x = packet[1] | ((packet[3] & 0x20) << 2);
 795                 y = packet[2] | ((packet[3] & 0x40) << 1);
 796                 z = packet[4];
 797                 left = packet[3] & 0x01;
 798                 right = packet[3] & 0x02;
 799                 middle = packet[3] & 0x04;
 800
 801                 /* To prevent the cursor jump when finger lifted */
 802                 if (x == 0x7F && y == 0x7F && z == 0x7F)
 803                         x = y = z = 0;
 804
 805                 /* Divide 4 since trackpoint's speed is too fast */
 806                 input_report_rel(dev2, REL_X, (char)x / 4);
 807                 input_report_rel(dev2, REL_Y, -((char)y / 4));
 808
 809                 input_report_key(dev2, BTN_LEFT, left);
 810                 input_report_key(dev2, BTN_RIGHT, right);
 811                 input_report_key(dev2, BTN_MIDDLE, middle);
 812
 813                 input_sync(dev2);
 814                 return;
 815         }
 816
 817         /* Touchpad packet */
 818         x = packet[1] | ((packet[3] & 0x78) << 4);
 819         y = packet[2] | ((packet[4] & 0x78) << 4);
 820         z = packet[5];
 821         left = packet[3] & 0x01;
 822         right = packet[3] & 0x02;
 823
 824         if (z > 30)
 825                 input_report_key(dev, BTN_TOUCH, 1);
 826         if (z < 25)
 827                 input_report_key(dev, BTN_TOUCH, 0);
 828
 829         if (z > 0) {
 830                 input_report_abs(dev, ABS_X, x);
 831                 input_report_abs(dev, ABS_Y, y);
 832         }
 833
 834         input_report_abs(dev, ABS_PRESSURE, z);
 835         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 836
 837         /* v6 touchpad does not have middle button */
 838         input_report_key(dev, BTN_LEFT, left);
 839         input_report_key(dev, BTN_RIGHT, right);
 840
 841         input_sync(dev);
 842 }
 843
 844 static void alps_process_packet_v4(struct psmouse *psmouse)
 845 {
 846         struct alps_data *priv = psmouse->private;
 847         unsigned char *packet = psmouse->packet;
 848         struct alps_fields *f = &priv->f;
 849         int offset;
 850
 851         /*
 852          * v4 has a 6-byte encoding for bitmap data, but this data is
 853          * broken up between 3 normal packets. Use priv->multi_packet to
 854          * track our position in the bitmap packet.
 855          */
 856         if (packet[6] & 0x40) {
 857                 /* sync, reset position */
 858                 priv->multi_packet = 0;
 859         }
 860
 861         if (WARN_ON_ONCE(priv->multi_packet > 2))
 862                 return;
 863
 864         offset = 2 * priv->multi_packet;
 865         priv->multi_data[offset] = packet[6];
 866         priv->multi_data[offset + 1] = packet[7];
 867
 868         if (++priv->multi_packet > 2) {
 869                 priv->multi_packet = 0;
 870
 871                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
 872                            ((priv->multi_data[3] & 0x60) << 3) |
 873                            ((priv->multi_data[0] & 0x3f) << 2) |
 874                            ((priv->multi_data[1] & 0x60) >> 5);
 875                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
 876                            ((priv->multi_data[3] & 0x1f) << 5) |
 877                             (priv->multi_data[1] & 0x1f);
 878
 879                 f->fingers = alps_process_bitmap(priv, f);
 880         }
 881
 882         f->left = !!(packet[4] & 0x01);
 883         f->right = !!(packet[4] & 0x02);
 884
 885         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 886                   ((packet[0] & 0x30) >> 4);
 887         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 888         f->pressure = packet[5] & 0x7f;
 889
 890         alps_report_semi_mt_data(psmouse, f->fingers);
 891 }
 892
 893 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
 894 {
 895         switch (psmouse->pktcnt) {
 896         case 3:
 897                 return (psmouse->packet[2] & 0x40) == 0x40;
 898         case 4:
 899                 return (psmouse->packet[3] & 0x48) == 0x48;
 900         case 6:
 901                 return (psmouse->packet[5] & 0x40) == 0x00;
 902         }
 903         return true;
 904 }
 905
 906 static unsigned char alps_get_packet_id_v7(char *byte)
 907 {
 908         unsigned char packet_id;
 909
 910         if (byte[4] & 0x40)
 911                 packet_id = V7_PACKET_ID_TWO;
 912         else if (byte[4] & 0x01)
 913                 packet_id = V7_PACKET_ID_MULTI;
 914         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
 915                 packet_id = V7_PACKET_ID_NEW;
 916         else if (byte[1] == 0x00 && byte[4] == 0x00)
 917                 packet_id = V7_PACKET_ID_IDLE;
 918         else
 919                 packet_id = V7_PACKET_ID_UNKNOWN;
 920
 921         return packet_id;
 922 }
 923
 924 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
 925                                           unsigned char *pkt,
 926                                           unsigned char pkt_id)
 927 {
 928         mt[0].x = ((pkt[2] & 0x80) << 4);
 929         mt[0].x |= ((pkt[2] & 0x3F) << 5);
 930         mt[0].x |= ((pkt[3] & 0x30) >> 1);
 931         mt[0].x |= (pkt[3] & 0x07);
 932         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
 933
 934         mt[1].x = ((pkt[3] & 0x80) << 4);
 935         mt[1].x |= ((pkt[4] & 0x80) << 3);
 936         mt[1].x |= ((pkt[4] & 0x3F) << 4);
 937         mt[1].y = ((pkt[5] & 0x80) << 3);
 938         mt[1].y |= ((pkt[5] & 0x3F) << 4);
 939
 940         switch (pkt_id) {
 941         case V7_PACKET_ID_TWO:
 942                 mt[1].x &= ~0x000F;
 943                 mt[1].y |= 0x000F;
 944                 break;
 945
 946         case V7_PACKET_ID_MULTI:
 947                 mt[1].x &= ~0x003F;
 948                 mt[1].y &= ~0x0020;
 949                 mt[1].y |= ((pkt[4] & 0x02) << 4);
 950                 mt[1].y |= 0x001F;
 951                 break;
 952
 953         case V7_PACKET_ID_NEW:
 954                 mt[1].x &= ~0x003F;
 955                 mt[1].x |= (pkt[0] & 0x20);
 956                 mt[1].y |= 0x000F;
 957                 break;
 958         }
 959
 960         mt[0].y = 0x7FF - mt[0].y;
 961         mt[1].y = 0x7FF - mt[1].y;
 962 }
 963
 964 static int alps_get_mt_count(struct input_mt_pos *mt)
 965 {
 966         int i, fingers = 0;
 967
 968         for (i = 0; i < MAX_TOUCHES; i++) {
 969                 if (mt[i].x != 0 || mt[i].y != 0)
 970                         fingers++;
 971         }
 972
 973         return fingers;
 974 }
 975
 976 static int alps_decode_packet_v7(struct alps_fields *f,
 977                                   unsigned char *p,
 978                                   struct psmouse *psmouse)
 979 {
 980         struct alps_data *priv = psmouse->private;
 981         unsigned char pkt_id;
 982
 983         pkt_id = alps_get_packet_id_v7(p);
 984         if (pkt_id == V7_PACKET_ID_IDLE)
 985                 return 0;
 986         if (pkt_id == V7_PACKET_ID_UNKNOWN)
 987                 return -1;
 988         /*
 989          * NEW packets are send to indicate a discontinuity in the finger
 990          * coordinate reporting. Specifically a finger may have moved from
 991          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
 992          * us.
 993          *
 994          * NEW packets have 3 problems:
 995          * 1) They do not contain middle / right button info (on non clickpads)
 996          *    this can be worked around by preserving the old button state
 997          * 2) They do not contain an accurate fingercount, and they are
 998          *    typically send when the number of fingers changes. We cannot use
 999          *    the old finger count as that may mismatch with the amount of
1000          *    touch coordinates we've available in the NEW packet
1001          * 3) Their x data for the second touch is inaccurate leading to
1002          *    a possible jump of the x coordinate by 16 units when the first
1003          *    non NEW packet comes in
1004          * Since problems 2 & 3 cannot be worked around, just ignore them.
1005          */
1006         if (pkt_id == V7_PACKET_ID_NEW)
1007                 return 1;
1008
1009         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1010
1011         if (pkt_id == V7_PACKET_ID_TWO)
1012                 f->fingers = alps_get_mt_count(f->mt);
1013         else /* pkt_id == V7_PACKET_ID_MULTI */
1014                 f->fingers = 3 + (p[5] & 0x03);
1015
1016         f->left = (p[0] & 0x80) >> 7;
1017         if (priv->flags & ALPS_BUTTONPAD) {
1018                 if (p[0] & 0x20)
1019                         f->fingers++;
1020                 if (p[0] & 0x10)
1021                         f->fingers++;
1022         } else {
1023                 f->right = (p[0] & 0x20) >> 5;
1024                 f->middle = (p[0] & 0x10) >> 4;
1025         }
1026
1027         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1028         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1029                 f->mt[0].x = f->mt[1].x;
1030                 f->mt[0].y = f->mt[1].y;
1031                 f->mt[1].x = 0;
1032                 f->mt[1].y = 0;
1033         }
1034
1035         return 0;
1036 }
1037
1038 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1039 {
1040         struct alps_data *priv = psmouse->private;
1041         unsigned char *packet = psmouse->packet;
1042         struct input_dev *dev2 = priv->dev2;
1043         int x, y, z, left, right, middle;
1044
1045         /* It should be a DualPoint when received trackstick packet */
1046         if (!(priv->flags & ALPS_DUALPOINT)) {
1047                 psmouse_warn(psmouse,
1048                              "Rejected trackstick packet from non DualPoint device");
1049                 return;
1050         }
1051
1052         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1053         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1054             ((packet[3] & 0x20) << 1);
1055         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1056
1057         left = (packet[1] & 0x01);
1058         right = (packet[1] & 0x02) >> 1;
1059         middle = (packet[1] & 0x04) >> 2;
1060
1061         /* Divide 2 since trackpoint's speed is too fast */
1062         input_report_rel(dev2, REL_X, (char)x / 2);
1063         input_report_rel(dev2, REL_Y, -((char)y / 2));
1064
1065         input_report_key(dev2, BTN_LEFT, left);
1066         input_report_key(dev2, BTN_RIGHT, right);
1067         input_report_key(dev2, BTN_MIDDLE, middle);
1068
1069         input_sync(dev2);
1070 }
1071
1072 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1073 {
1074         struct alps_data *priv = psmouse->private;
1075         struct input_dev *dev = psmouse->dev;
1076         struct alps_fields *f = &priv->f;
1077
1078         memset(f, 0, sizeof(*f));
1079
1080         if (priv->decode_fields(f, psmouse->packet, psmouse))
1081                 return;
1082
1083         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1084
1085         input_mt_report_finger_count(dev, f->fingers);
1086
1087         input_report_key(dev, BTN_LEFT, f->left);
1088         input_report_key(dev, BTN_RIGHT, f->right);
1089         input_report_key(dev, BTN_MIDDLE, f->middle);
1090
1091         input_sync(dev);
1092 }
1093
1094 static void alps_process_packet_v7(struct psmouse *psmouse)
1095 {
1096         unsigned char *packet = psmouse->packet;
1097
1098         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1099                 alps_process_trackstick_packet_v7(psmouse);
1100         else
1101                 alps_process_touchpad_packet_v7(psmouse);
1102 }
1103
1104 static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)
1105 {
1106         unsigned char pkt_id = SS4_PACKET_ID_IDLE;
1107
1108         if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&
1109             (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) {
1110                 pkt_id = SS4_PACKET_ID_IDLE;
1111         } else if (!(byte[3] & 0x10)) {
1112                 pkt_id = SS4_PACKET_ID_ONE;
1113         } else if (!(byte[3] & 0x20)) {
1114                 pkt_id = SS4_PACKET_ID_TWO;
1115         } else {
1116                 pkt_id = SS4_PACKET_ID_MULTI;
1117         }
1118
1119         return pkt_id;
1120 }
1121
1122 static int alps_decode_ss4_v2(struct alps_fields *f,
1123                               unsigned char *p, struct psmouse *psmouse)
1124 {
1125         struct alps_data *priv = psmouse->private;
1126         unsigned char pkt_id;
1127         unsigned int no_data_x, no_data_y;
1128
1129         pkt_id = alps_get_pkt_id_ss4_v2(p);
1130
1131         /* Current packet is 1Finger coordinate packet */
1132         switch (pkt_id) {
1133         case SS4_PACKET_ID_ONE:
1134                 f->mt[0].x = SS4_1F_X_V2(p);
1135                 f->mt[0].y = SS4_1F_Y_V2(p);
1136                 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1137                 f->fingers = 1;
1138                 f->first_mp = 0;
1139                 f->is_mp = 0;
1140                 break;
1141
1142         case SS4_PACKET_ID_TWO:
1143                 if (priv->flags & ALPS_BUTTONPAD) {
1144                         f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1145                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1146                         f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1147                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1148                 } else {
1149                         f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1150                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1151                         f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1152                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1153                 }
1154                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1155
1156                 if (SS4_IS_MF_CONTINUE(p)) {
1157                         f->first_mp = 1;
1158                 } else {
1159                         f->fingers = 2;
1160                         f->first_mp = 0;
1161                 }
1162                 f->is_mp = 0;
1163
1164                 break;
1165
1166         case SS4_PACKET_ID_MULTI:
1167                 if (priv->flags & ALPS_BUTTONPAD) {
1168                         f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1169                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1170                         f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1171                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1172                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1173                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1174                 } else {
1175                         f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1176                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1177                         f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1178                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1179                         no_data_x = SS4_MFPACKET_NO_AX;
1180                         no_data_y = SS4_MFPACKET_NO_AY;
1181                 }
1182
1183                 f->first_mp = 0;
1184                 f->is_mp = 1;
1185
1186                 if (SS4_IS_5F_DETECTED(p)) {
1187                         f->fingers = 5;
1188                 } else if (f->mt[3].x == no_data_x &&
1189                              f->mt[3].y == no_data_y) {
1190                         f->mt[3].x = 0;
1191                         f->mt[3].y = 0;
1192                         f->fingers = 3;
1193                 } else {
1194                         f->fingers = 4;
1195                 }
1196                 break;
1197
1198         case SS4_PACKET_ID_IDLE:
1199         default:
1200                 memset(f, 0, sizeof(struct alps_fields));
1201                 break;
1202         }
1203
1204         f->left = !!(SS4_BTN_V2(p) & 0x01);
1205         if (!(priv->flags & ALPS_BUTTONPAD)) {
1206                 f->right = !!(SS4_BTN_V2(p) & 0x02);
1207                 f->middle = !!(SS4_BTN_V2(p) & 0x04);
1208         }
1209
1210         return 0;
1211 }
1212
1213 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1214 {
1215         struct alps_data *priv = psmouse->private;
1216         unsigned char *packet = psmouse->packet;
1217         struct input_dev *dev = psmouse->dev;
1218         struct alps_fields *f = &priv->f;
1219
1220         memset(f, 0, sizeof(struct alps_fields));
1221         priv->decode_fields(f, packet, psmouse);
1222         if (priv->multi_packet) {
1223                 /*
1224                  * Sometimes the first packet will indicate a multi-packet
1225                  * sequence, but sometimes the next multi-packet would not
1226                  * come. Check for this, and when it happens process the
1227                  * position packet as usual.
1228                  */
1229                 if (f->is_mp) {
1230                         /* Now process the 1st packet */
1231                         priv->decode_fields(f, priv->multi_data, psmouse);
1232                 } else {
1233                         priv->multi_packet = 0;
1234                 }
1235         }
1236
1237         /*
1238          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1239          * When it is set, it means 2nd packet comes without 1st packet come.
1240          */
1241         if (f->is_mp)
1242                 return;
1243
1244         /* Save the first packet */
1245         if (!priv->multi_packet && f->first_mp) {
1246                 priv->multi_packet = 1;
1247                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1248                 return;
1249         }
1250
1251         priv->multi_packet = 0;
1252
1253         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1254
1255         input_mt_report_finger_count(dev, f->fingers);
1256
1257         input_report_key(dev, BTN_LEFT, f->left);
1258         input_report_key(dev, BTN_RIGHT, f->right);
1259         input_report_key(dev, BTN_MIDDLE, f->middle);
1260
1261         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1262         input_sync(dev);
1263 }
1264
1265 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1266 {
1267         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1268                 return false;
1269         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1270                 return false;
1271         return true;
1272 }
1273
1274 static DEFINE_MUTEX(alps_mutex);
1275
1276 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1277 {
1278         struct alps_data *priv =
1279                 container_of(work, struct alps_data, dev3_register_work.work);
1280         struct psmouse *psmouse = priv->psmouse;
1281         struct input_dev *dev3;
1282         int error = 0;
1283
1284         mutex_lock(&alps_mutex);
1285
1286         if (priv->dev3)
1287                 goto out;
1288
1289         dev3 = input_allocate_device();
1290         if (!dev3) {
1291                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1292                 error = -ENOMEM;
1293                 goto out;
1294         }
1295
1296         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1297                  psmouse->ps2dev.serio->phys,
1298                  (priv->dev2 ? "input2" : "input1"));
1299         dev3->phys = priv->phys3;
1300
1301         /*
1302          * format of input device name is: "protocol vendor name"
1303          * see function psmouse_switch_protocol() in psmouse-base.c
1304          */
1305         dev3->name = "PS/2 ALPS Mouse";
1306
1307         dev3->id.bustype = BUS_I8042;
1308         dev3->id.vendor  = 0x0002;
1309         dev3->id.product = PSMOUSE_PS2;
1310         dev3->id.version = 0x0000;
1311         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1312
1313         input_set_capability(dev3, EV_REL, REL_X);
1314         input_set_capability(dev3, EV_REL, REL_Y);
1315         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1316         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1317         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1318
1319         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1320
1321         error = input_register_device(dev3);
1322         if (error) {
1323                 psmouse_err(psmouse,
1324                             "failed to register secondary device: %d\n",
1325                             error);
1326                 input_free_device(dev3);
1327                 goto out;
1328         }
1329
1330         priv->dev3 = dev3;
1331
1332 out:
1333         /*
1334          * Save the error code so that we can detect that we
1335          * already tried to create the device.
1336          */
1337         if (error)
1338                 priv->dev3 = ERR_PTR(error);
1339
1340         mutex_unlock(&alps_mutex);
1341 }
1342
1343 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1344                                         unsigned char packet[],
1345                                         bool report_buttons)
1346 {
1347         struct alps_data *priv = psmouse->private;
1348         struct input_dev *dev, *dev2 = NULL;
1349
1350         /* Figure out which device to use to report the bare packet */
1351         if (priv->proto_version == ALPS_PROTO_V2 &&
1352             (priv->flags & ALPS_DUALPOINT)) {
1353                 /* On V2 devices the DualPoint Stick reports bare packets */
1354                 dev = priv->dev2;
1355                 dev2 = psmouse->dev;
1356         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1357                 /* Register dev3 mouse if we received PS/2 packet first time */
1358                 if (!IS_ERR(priv->dev3))
1359                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1360                                            0);
1361                 return;
1362         } else {
1363                 dev = priv->dev3;
1364         }
1365
1366         if (report_buttons)
1367                 alps_report_buttons(dev, dev2,
1368                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1369
1370         input_report_rel(dev, REL_X,
1371                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1372         input_report_rel(dev, REL_Y,
1373                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1374
1375         input_sync(dev);
1376 }
1377
1378 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1379 {
1380         struct alps_data *priv = psmouse->private;
1381
1382         if (psmouse->pktcnt < 6)
1383                 return PSMOUSE_GOOD_DATA;
1384
1385         if (psmouse->pktcnt == 6) {
1386                 /*
1387                  * Start a timer to flush the packet if it ends up last
1388                  * 6-byte packet in the stream. Timer needs to fire
1389                  * psmouse core times out itself. 20 ms should be enough
1390                  * to decide if we are getting more data or not.
1391                  */
1392                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1393                 return PSMOUSE_GOOD_DATA;
1394         }
1395
1396         del_timer(&priv->timer);
1397
1398         if (psmouse->packet[6] & 0x80) {
1399
1400                 /*
1401                  * Highest bit is set - that means we either had
1402                  * complete ALPS packet and this is start of the
1403                  * next packet or we got garbage.
1404                  */
1405
1406                 if (((psmouse->packet[3] |
1407                       psmouse->packet[4] |
1408                       psmouse->packet[5]) & 0x80) ||
1409                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1410                         psmouse_dbg(psmouse,
1411                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1412                                     psmouse->packet + 3);
1413                         return PSMOUSE_BAD_DATA;
1414                 }
1415
1416                 priv->process_packet(psmouse);
1417
1418                 /* Continue with the next packet */
1419                 psmouse->packet[0] = psmouse->packet[6];
1420                 psmouse->pktcnt = 1;
1421
1422         } else {
1423
1424                 /*
1425                  * High bit is 0 - that means that we indeed got a PS/2
1426                  * packet in the middle of ALPS packet.
1427                  *
1428                  * There is also possibility that we got 6-byte ALPS
1429                  * packet followed  by 3-byte packet from trackpoint. We
1430                  * can not distinguish between these 2 scenarios but
1431                  * because the latter is unlikely to happen in course of
1432                  * normal operation (user would need to press all
1433                  * buttons on the pad and start moving trackpoint
1434                  * without touching the pad surface) we assume former.
1435                  * Even if we are wrong the wost thing that would happen
1436                  * the cursor would jump but we should not get protocol
1437                  * de-synchronization.
1438                  */
1439
1440                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1441                                             false);
1442
1443                 /*
1444                  * Continue with the standard ALPS protocol handling,
1445                  * but make sure we won't process it as an interleaved
1446                  * packet again, which may happen if all buttons are
1447                  * pressed. To avoid this let's reset the 4th bit which
1448                  * is normally 1.
1449                  */
1450                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1451                 psmouse->pktcnt = 4;
1452         }
1453
1454         return PSMOUSE_GOOD_DATA;
1455 }
1456
1457 static void alps_flush_packet(unsigned long data)
1458 {
1459         struct psmouse *psmouse = (struct psmouse *)data;
1460         struct alps_data *priv = psmouse->private;
1461
1462         serio_pause_rx(psmouse->ps2dev.serio);
1463
1464         if (psmouse->pktcnt == psmouse->pktsize) {
1465
1466                 /*
1467                  * We did not any more data in reasonable amount of time.
1468                  * Validate the last 3 bytes and process as a standard
1469                  * ALPS packet.
1470                  */
1471                 if ((psmouse->packet[3] |
1472                      psmouse->packet[4] |
1473                      psmouse->packet[5]) & 0x80) {
1474                         psmouse_dbg(psmouse,
1475                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1476                                     psmouse->packet + 3);
1477                 } else {
1478                         priv->process_packet(psmouse);
1479                 }
1480                 psmouse->pktcnt = 0;
1481         }
1482
1483         serio_continue_rx(psmouse->ps2dev.serio);
1484 }
1485
1486 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1487 {
1488         struct alps_data *priv = psmouse->private;
1489
1490         /*
1491          * Check if we are dealing with a bare PS/2 packet, presumably from
1492          * a device connected to the external PS/2 port. Because bare PS/2
1493          * protocol does not have enough constant bits to self-synchronize
1494          * properly we only do this if the device is fully synchronized.
1495          * Can not distinguish V8's first byte from PS/2 packet's
1496          */
1497         if (priv->proto_version != ALPS_PROTO_V8 &&
1498             !psmouse->out_of_sync_cnt &&
1499             (psmouse->packet[0] & 0xc8) == 0x08) {
1500
1501                 if (psmouse->pktcnt == 3) {
1502                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1503                                                     true);
1504                         return PSMOUSE_FULL_PACKET;
1505                 }
1506                 return PSMOUSE_GOOD_DATA;
1507         }
1508
1509         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1510
1511         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1512             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1513                 return alps_handle_interleaved_ps2(psmouse);
1514         }
1515
1516         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1517                 psmouse_dbg(psmouse,
1518                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1519                             psmouse->packet[0], priv->mask0, priv->byte0);
1520                 return PSMOUSE_BAD_DATA;
1521         }
1522
1523         /* Bytes 2 - pktsize should have 0 in the highest bit */
1524         if (priv->proto_version < ALPS_PROTO_V5 &&
1525             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1526             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1527                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1528                             psmouse->pktcnt - 1,
1529                             psmouse->packet[psmouse->pktcnt - 1]);
1530
1531                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1532                     psmouse->pktcnt == psmouse->pktsize) {
1533                         /*
1534                          * Some Dell boxes, such as Latitude E6440 or E7440
1535                          * with closed lid, quite often smash last byte of
1536                          * otherwise valid packet with 0xff. Given that the
1537                          * next packet is very likely to be valid let's
1538                          * report PSMOUSE_FULL_PACKET but not process data,
1539                          * rather than reporting PSMOUSE_BAD_DATA and
1540                          * filling the logs.
1541                          */
1542                         return PSMOUSE_FULL_PACKET;
1543                 }
1544
1545                 return PSMOUSE_BAD_DATA;
1546         }
1547
1548         if ((priv->proto_version == ALPS_PROTO_V7 &&
1549                         !alps_is_valid_package_v7(psmouse)) ||
1550             (priv->proto_version == ALPS_PROTO_V8 &&
1551                         !alps_is_valid_package_ss4_v2(psmouse))) {
1552                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1553                             psmouse->pktcnt - 1,
1554                             psmouse->packet[psmouse->pktcnt - 1]);
1555                 return PSMOUSE_BAD_DATA;
1556         }
1557
1558         if (psmouse->pktcnt == psmouse->pktsize) {
1559                 priv->process_packet(psmouse);
1560                 return PSMOUSE_FULL_PACKET;
1561         }
1562
1563         return PSMOUSE_GOOD_DATA;
1564 }
1565
1566 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1567 {
1568         struct ps2dev *ps2dev = &psmouse->ps2dev;
1569         struct alps_data *priv = psmouse->private;
1570         int command;
1571         unsigned char *param;
1572         unsigned char dummy[4];
1573
1574         BUG_ON(nibble > 0xf);
1575
1576         command = priv->nibble_commands[nibble].command;
1577         param = (command & 0x0f00) ?
1578                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1579
1580         if (ps2_command(ps2dev, param, command))
1581                 return -1;
1582
1583         return 0;
1584 }
1585
1586 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1587 {
1588         struct ps2dev *ps2dev = &psmouse->ps2dev;
1589         struct alps_data *priv = psmouse->private;
1590         int i, nibble;
1591
1592         if (ps2_command(ps2dev, NULL, priv->addr_command))
1593                 return -1;
1594
1595         for (i = 12; i >= 0; i -= 4) {
1596                 nibble = (addr >> i) & 0xf;
1597                 if (alps_command_mode_send_nibble(psmouse, nibble))
1598                         return -1;
1599         }
1600
1601         return 0;
1602 }
1603
1604 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1605 {
1606         struct ps2dev *ps2dev = &psmouse->ps2dev;
1607         unsigned char param[4];
1608
1609         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1610                 return -1;
1611
1612         /*
1613          * The address being read is returned in the first two bytes
1614          * of the result. Check that this address matches the expected
1615          * address.
1616          */
1617         if (addr != ((param[0] << 8) | param[1]))
1618                 return -1;
1619
1620         return param[2];
1621 }
1622
1623 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1624 {
1625         if (alps_command_mode_set_addr(psmouse, addr))
1626                 return -1;
1627         return __alps_command_mode_read_reg(psmouse, addr);
1628 }
1629
1630 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1631 {
1632         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1633                 return -1;
1634         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1635                 return -1;
1636         return 0;
1637 }
1638
1639 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1640                                        u8 value)
1641 {
1642         if (alps_command_mode_set_addr(psmouse, addr))
1643                 return -1;
1644         return __alps_command_mode_write_reg(psmouse, value);
1645 }
1646
1647 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1648                         int repeated_command, unsigned char *param)
1649 {
1650         struct ps2dev *ps2dev = &psmouse->ps2dev;
1651
1652         param[0] = 0;
1653         if (init_command && ps2_command(ps2dev, param, init_command))
1654                 return -EIO;
1655
1656         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1657             ps2_command(ps2dev,  NULL, repeated_command) ||
1658             ps2_command(ps2dev,  NULL, repeated_command))
1659                 return -EIO;
1660
1661         param[0] = param[1] = param[2] = 0xff;
1662         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1663                 return -EIO;
1664
1665         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1666                     repeated_command, param);
1667         return 0;
1668 }
1669
1670 static bool alps_check_valid_firmware_id(unsigned char id[])
1671 {
1672         if (id[0] == 0x73)
1673                 return true;
1674
1675         if (id[0] == 0x88 &&
1676             (id[1] == 0x07 ||
1677              id[1] == 0x08 ||
1678              (id[1] & 0xf0) == 0xb0 ||
1679              (id[1] & 0xf0) == 0xc0)) {
1680                 return true;
1681         }
1682
1683         return false;
1684 }
1685
1686 static int alps_enter_command_mode(struct psmouse *psmouse)
1687 {
1688         unsigned char param[4];
1689
1690         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1691                 psmouse_err(psmouse, "failed to enter command mode\n");
1692                 return -1;
1693         }
1694
1695         if (!alps_check_valid_firmware_id(param)) {
1696                 psmouse_dbg(psmouse,
1697                             "unknown response while entering command mode\n");
1698                 return -1;
1699         }
1700         return 0;
1701 }
1702
1703 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1704 {
1705         struct ps2dev *ps2dev = &psmouse->ps2dev;
1706         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1707                 return -1;
1708         return 0;
1709 }
1710
1711 /*
1712  * For DualPoint devices select the device that should respond to
1713  * subsequent commands. It looks like glidepad is behind stickpointer,
1714  * I'd thought it would be other way around...
1715  */
1716 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1717 {
1718         struct ps2dev *ps2dev = &psmouse->ps2dev;
1719         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1720
1721         if (ps2_command(ps2dev, NULL, cmd) ||
1722             ps2_command(ps2dev, NULL, cmd) ||
1723             ps2_command(ps2dev, NULL, cmd) ||
1724             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1725                 return -1;
1726
1727         /* we may get 3 more bytes, just ignore them */
1728         ps2_drain(ps2dev, 3, 100);
1729
1730         return 0;
1731 }
1732
1733 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1734 {
1735         struct ps2dev *ps2dev = &psmouse->ps2dev;
1736
1737         /* Try ALPS magic knock - 4 disable before enable */
1738         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1739             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1740             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1741             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1742             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1743                 return -1;
1744
1745         /*
1746          * Switch mouse to poll (remote) mode so motion data will not
1747          * get in our way
1748          */
1749         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1750 }
1751
1752 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1753 {
1754         int i, nibble;
1755
1756         /*
1757          * b0-b11 are valid bits, send sequence is inverse.
1758          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1759          */
1760         for (i = 0; i <= 8; i += 4) {
1761                 nibble = (word >> i) & 0xf;
1762                 if (alps_command_mode_send_nibble(psmouse, nibble))
1763                         return -1;
1764         }
1765
1766         return 0;
1767 }
1768
1769 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1770                                        u16 addr, u16 value)
1771 {
1772         struct ps2dev *ps2dev = &psmouse->ps2dev;
1773
1774         /* 0x0A0 is the command to write the word */
1775         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1776             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1777             alps_monitor_mode_send_word(psmouse, addr) ||
1778             alps_monitor_mode_send_word(psmouse, value) ||
1779             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1780                 return -1;
1781
1782         return 0;
1783 }
1784
1785 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1786 {
1787         struct ps2dev *ps2dev = &psmouse->ps2dev;
1788
1789         if (enable) {
1790                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1791                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1792                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1793                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1794                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1795                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1796                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1797                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1798                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1799                         return -1;
1800         } else {
1801                 /* EC to exit monitor mode */
1802                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1803                         return -1;
1804         }
1805
1806         return 0;
1807 }
1808
1809 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1810 {
1811         u16 reg_val = 0x181;
1812         int ret = -1;
1813
1814         /* enter monitor mode, to write the register */
1815         if (alps_monitor_mode(psmouse, true))
1816                 return -1;
1817
1818         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1819
1820         if (alps_monitor_mode(psmouse, false))
1821                 ret = -1;
1822
1823         return ret;
1824 }
1825
1826 static int alps_get_status(struct psmouse *psmouse, char *param)
1827 {
1828         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1829         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1830                 return -1;
1831
1832         return 0;
1833 }
1834
1835 /*
1836  * Turn touchpad tapping on or off. The sequences are:
1837  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1838  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1839  * My guess that 0xE9 (GetInfo) is here as a sync point.
1840  * For models that also have stickpointer (DualPoints) its tapping
1841  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1842  * we don't fiddle with it.
1843  */
1844 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1845 {
1846         struct ps2dev *ps2dev = &psmouse->ps2dev;
1847         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1848         unsigned char tap_arg = enable ? 0x0A : 0x00;
1849         unsigned char param[4];
1850
1851         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1852             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1853             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1854             ps2_command(ps2dev, &tap_arg, cmd))
1855                 return -1;
1856
1857         if (alps_get_status(psmouse, param))
1858                 return -1;
1859
1860         return 0;
1861 }
1862
1863 /*
1864  * alps_poll() - poll the touchpad for current motion packet.
1865  * Used in resync.
1866  */
1867 static int alps_poll(struct psmouse *psmouse)
1868 {
1869         struct alps_data *priv = psmouse->private;
1870         unsigned char buf[sizeof(psmouse->packet)];
1871         bool poll_failed;
1872
1873         if (priv->flags & ALPS_PASS)
1874                 alps_passthrough_mode_v2(psmouse, true);
1875
1876         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1877                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1878
1879         if (priv->flags & ALPS_PASS)
1880                 alps_passthrough_mode_v2(psmouse, false);
1881
1882         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1883                 return -1;
1884
1885         if ((psmouse->badbyte & 0xc8) == 0x08) {
1886 /*
1887  * Poll the track stick ...
1888  */
1889                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1890                         return -1;
1891         }
1892
1893         memcpy(psmouse->packet, buf, sizeof(buf));
1894         return 0;
1895 }
1896
1897 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1898 {
1899         struct alps_data *priv = psmouse->private;
1900
1901         if ((priv->flags & ALPS_PASS) &&
1902             alps_passthrough_mode_v2(psmouse, true)) {
1903                 return -1;
1904         }
1905
1906         if (alps_tap_mode(psmouse, true)) {
1907                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1908                 return -1;
1909         }
1910
1911         if (alps_absolute_mode_v1_v2(psmouse)) {
1912                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1913                 return -1;
1914         }
1915
1916         if ((priv->flags & ALPS_PASS) &&
1917             alps_passthrough_mode_v2(psmouse, false)) {
1918                 return -1;
1919         }
1920
1921         /* ALPS needs stream mode, otherwise it won't report any data */
1922         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1923                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1924                 return -1;
1925         }
1926
1927         return 0;
1928 }
1929
1930 static int alps_hw_init_v6(struct psmouse *psmouse)
1931 {
1932         unsigned char param[2] = {0xC8, 0x14};
1933
1934         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1935         if (alps_passthrough_mode_v2(psmouse, true))
1936                 return -1;
1937
1938         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1939             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1940             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1941             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1942             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1943                 return -1;
1944
1945         if (alps_passthrough_mode_v2(psmouse, false))
1946                 return -1;
1947
1948         if (alps_absolute_mode_v6(psmouse)) {
1949                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1950                 return -1;
1951         }
1952
1953         return 0;
1954 }
1955
1956 /*
1957  * Enable or disable passthrough mode to the trackstick.
1958  */
1959 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1960                                     int reg_base, bool enable)
1961 {
1962         int reg_val, ret = -1;
1963
1964         if (alps_enter_command_mode(psmouse))
1965                 return -1;
1966
1967         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1968         if (reg_val == -1)
1969                 goto error;
1970
1971         if (enable)
1972                 reg_val |= 0x01;
1973         else
1974                 reg_val &= ~0x01;
1975
1976         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1977
1978 error:
1979         if (alps_exit_command_mode(psmouse))
1980                 ret = -1;
1981         return ret;
1982 }
1983
1984 /* Must be in command mode when calling this function */
1985 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1986 {
1987         int reg_val;
1988
1989         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1990         if (reg_val == -1)
1991                 return -1;
1992
1993         reg_val |= 0x06;
1994         if (__alps_command_mode_write_reg(psmouse, reg_val))
1995                 return -1;
1996
1997         return 0;
1998 }
1999
2000 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
2001 {
2002         int ret = -EIO, reg_val;
2003
2004         if (alps_enter_command_mode(psmouse))
2005                 goto error;
2006
2007         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2008         if (reg_val == -1)
2009                 goto error;
2010
2011         /* bit 7: trackstick is present */
2012         ret = reg_val & 0x80 ? 0 : -ENODEV;
2013
2014 error:
2015         alps_exit_command_mode(psmouse);
2016         return ret;
2017 }
2018
2019 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2020 {
2021         struct ps2dev *ps2dev = &psmouse->ps2dev;
2022         int ret = 0;
2023         unsigned char param[4];
2024
2025         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2026                 return -EIO;
2027
2028         /*
2029          * E7 report for the trackstick
2030          *
2031          * There have been reports of failures to seem to trace back
2032          * to the above trackstick check failing. When these occur
2033          * this E7 report fails, so when that happens we continue
2034          * with the assumption that there isn't a trackstick after
2035          * all.
2036          */
2037         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2038                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2039                 ret = -ENODEV;
2040         } else {
2041                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2042
2043                 /*
2044                  * Not sure what this does, but it is absolutely
2045                  * essential. Without it, the touchpad does not
2046                  * work at all and the trackstick just emits normal
2047                  * PS/2 packets.
2048                  */
2049                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2050                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2051                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2052                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2053                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2054                         psmouse_err(psmouse,
2055                                     "Error sending magic E6 sequence\n");
2056                         ret = -EIO;
2057                         goto error;
2058                 }
2059
2060                 /*
2061                  * This ensures the trackstick packets are in the format
2062                  * supported by this driver. If bit 1 isn't set the packet
2063                  * format is different.
2064                  */
2065                 if (alps_enter_command_mode(psmouse) ||
2066                     alps_command_mode_write_reg(psmouse,
2067                                                 reg_base + 0x08, 0x82) ||
2068                     alps_exit_command_mode(psmouse))
2069                         ret = -EIO;
2070         }
2071
2072 error:
2073         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2074                 ret = -EIO;
2075
2076         return ret;
2077 }
2078
2079 static int alps_hw_init_v3(struct psmouse *psmouse)
2080 {
2081         struct ps2dev *ps2dev = &psmouse->ps2dev;
2082         int reg_val;
2083         unsigned char param[4];
2084
2085         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
2086         if (reg_val == -EIO)
2087                 goto error;
2088
2089         if (reg_val == 0 &&
2090             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2091                 goto error;
2092
2093         if (alps_enter_command_mode(psmouse) ||
2094             alps_absolute_mode_v3(psmouse)) {
2095                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2096                 goto error;
2097         }
2098
2099         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2100         if (reg_val == -1)
2101                 goto error;
2102         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2103                 goto error;
2104
2105         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2106         if (reg_val == -1)
2107                 goto error;
2108         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2109                 goto error;
2110
2111         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2112                 goto error;
2113         if (__alps_command_mode_write_reg(psmouse, 0x04))
2114                 goto error;
2115
2116         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2117                 goto error;
2118         if (__alps_command_mode_write_reg(psmouse, 0x03))
2119                 goto error;
2120
2121         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2122                 goto error;
2123         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2124                 goto error;
2125
2126         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2127                 goto error;
2128         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2129                 goto error;
2130
2131         alps_exit_command_mode(psmouse);
2132
2133         /* Set rate and enable data reporting */
2134         param[0] = 0x64;
2135         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2136             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2137                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2138                 return -1;
2139         }
2140
2141         return 0;
2142
2143 error:
2144         /*
2145          * Leaving the touchpad in command mode will essentially render
2146          * it unusable until the machine reboots, so exit it here just
2147          * to be safe
2148          */
2149         alps_exit_command_mode(psmouse);
2150         return -1;
2151 }
2152
2153 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2154 {
2155         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2156         struct alps_data *priv = psmouse->private;
2157
2158         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2159         if (reg < 0)
2160                 return reg;
2161
2162         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2163         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2164
2165         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2166         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2167
2168         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2169         if (reg < 0)
2170                 return reg;
2171
2172         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2173         x_electrode = 17 + x_electrode;
2174
2175         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2176         y_electrode = 13 + y_electrode;
2177
2178         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2179         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2180
2181         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2182         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2183
2184         psmouse_dbg(psmouse,
2185                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2186                     x_pitch, y_pitch, x_electrode, y_electrode,
2187                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2188
2189         return 0;
2190 }
2191
2192 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2193 {
2194         struct alps_data *priv = psmouse->private;
2195         struct ps2dev *ps2dev = &psmouse->ps2dev;
2196         int reg_val, ret = -1;
2197
2198         if (priv->flags & ALPS_DUALPOINT) {
2199                 reg_val = alps_setup_trackstick_v3(psmouse,
2200                                                    ALPS_REG_BASE_RUSHMORE);
2201                 if (reg_val == -EIO)
2202                         goto error;
2203         }
2204
2205         if (alps_enter_command_mode(psmouse) ||
2206             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2207             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2208                 goto error;
2209
2210         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2211                 goto error;
2212
2213         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2214         if (reg_val == -1)
2215                 goto error;
2216         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2217                 goto error;
2218
2219         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2220                 goto error;
2221
2222         /* enter absolute mode */
2223         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2224         if (reg_val == -1)
2225                 goto error;
2226         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2227                 goto error;
2228
2229         alps_exit_command_mode(psmouse);
2230         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2231
2232 error:
2233         alps_exit_command_mode(psmouse);
2234         return ret;
2235 }
2236
2237 /* Must be in command mode when calling this function */
2238 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2239 {
2240         int reg_val;
2241
2242         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2243         if (reg_val == -1)
2244                 return -1;
2245
2246         reg_val |= 0x02;
2247         if (__alps_command_mode_write_reg(psmouse, reg_val))
2248                 return -1;
2249
2250         return 0;
2251 }
2252
2253 static int alps_hw_init_v4(struct psmouse *psmouse)
2254 {
2255         struct ps2dev *ps2dev = &psmouse->ps2dev;
2256         unsigned char param[4];
2257
2258         if (alps_enter_command_mode(psmouse))
2259                 goto error;
2260
2261         if (alps_absolute_mode_v4(psmouse)) {
2262                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2263                 goto error;
2264         }
2265
2266         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2267                 goto error;
2268
2269         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2270                 goto error;
2271
2272         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2273                 goto error;
2274
2275         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2276                 goto error;
2277
2278         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2279                 goto error;
2280
2281         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2282                 goto error;
2283
2284         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2285                 goto error;
2286
2287         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2288                 goto error;
2289
2290         alps_exit_command_mode(psmouse);
2291
2292         /*
2293          * This sequence changes the output from a 9-byte to an
2294          * 8-byte format. All the same data seems to be present,
2295          * just in a more compact format.
2296          */
2297         param[0] = 0xc8;
2298         param[1] = 0x64;
2299         param[2] = 0x50;
2300         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2301             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2302             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2303             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2304                 return -1;
2305
2306         /* Set rate and enable data reporting */
2307         param[0] = 0x64;
2308         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2309             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2310                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2311                 return -1;
2312         }
2313
2314         return 0;
2315
2316 error:
2317         /*
2318          * Leaving the touchpad in command mode will essentially render
2319          * it unusable until the machine reboots, so exit it here just
2320          * to be safe
2321          */
2322         alps_exit_command_mode(psmouse);
2323         return -1;
2324 }
2325
2326 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2327                                       unsigned char index, unsigned char otp[])
2328 {
2329         struct ps2dev *ps2dev = &psmouse->ps2dev;
2330
2331         switch (index) {
2332         case 0:
2333                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2334                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2335                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2336                         return -1;
2337
2338                 break;
2339
2340         case 1:
2341                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2342                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2343                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2344                         return -1;
2345
2346                 break;
2347         }
2348
2349         return 0;
2350 }
2351
2352 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2353                                           struct alps_data *priv)
2354 {
2355         int num_x_electrode;
2356         int num_y_electrode;
2357         int x_pitch, y_pitch, x_phys, y_phys;
2358
2359         num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2360         num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2361
2362         priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2363         priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2364
2365         x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2366         y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2367
2368         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2369         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2370
2371         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2372         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2373
2374         return 0;
2375 }
2376
2377 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2378                                        struct alps_data *priv)
2379 {
2380         unsigned char is_btnless;
2381
2382         is_btnless = (otp[1][1] >> 3) & 0x01;
2383
2384         if (is_btnless)
2385                 priv->flags |= ALPS_BUTTONPAD;
2386
2387         return 0;
2388 }
2389
2390 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2391                                     struct alps_data *priv)
2392 {
2393         unsigned char otp[2][4];
2394
2395         memset(otp, 0, sizeof(otp));
2396
2397         if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2398             alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2399                 return -1;
2400
2401         alps_update_device_area_ss4_v2(otp, priv);
2402
2403         alps_update_btn_info_ss4_v2(otp, priv);
2404
2405         return 0;
2406 }
2407
2408 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2409                                         struct alps_data *priv)
2410 {
2411         struct ps2dev *ps2dev = &psmouse->ps2dev;
2412         unsigned char param[4] = {0};
2413         int num_x_electrode, num_y_electrode;
2414
2415         if (alps_enter_command_mode(psmouse))
2416                 return -1;
2417
2418         param[0] = 0x0a;
2419         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2420             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2421             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2422             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2423             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2424                 return -1;
2425
2426         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2427                 return -1;
2428
2429         /*
2430          * Dolphin's sensor line number is not fixed. It can be calculated
2431          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2432          * Further more, we can get device's x_max and y_max by multiplying
2433          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2434          *
2435          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2436          *      real sensor line number X = 11 + 8 = 19, and
2437          *      real sensor line number Y = 8 + 1 = 9.
2438          *      So, x_max = (19 - 1) * 64 = 1152, and
2439          *          y_max = (9 - 1) * 64 = 512.
2440          */
2441         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2442         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2443         priv->x_bits = num_x_electrode;
2444         priv->y_bits = num_y_electrode;
2445         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2446         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2447
2448         if (alps_exit_command_mode(psmouse))
2449                 return -1;
2450
2451         return 0;
2452 }
2453
2454 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2455 {
2456         struct ps2dev *ps2dev = &psmouse->ps2dev;
2457         unsigned char param[2];
2458
2459         /* This is dolphin "v1" as empirically defined by florin9doi */
2460         param[0] = 0x64;
2461         param[1] = 0x28;
2462
2463         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2464             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2465             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2466                 return -1;
2467
2468         return 0;
2469 }
2470
2471 static int alps_hw_init_v7(struct psmouse *psmouse)
2472 {
2473         struct ps2dev *ps2dev = &psmouse->ps2dev;
2474         int reg_val, ret = -1;
2475
2476         if (alps_enter_command_mode(psmouse) ||
2477             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2478                 goto error;
2479
2480         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2481                 goto error;
2482
2483         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2484                 goto error;
2485
2486         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2487         if (reg_val == -1)
2488                 goto error;
2489         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2490                 goto error;
2491
2492         alps_exit_command_mode(psmouse);
2493         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2494
2495 error:
2496         alps_exit_command_mode(psmouse);
2497         return ret;
2498 }
2499
2500 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2501 {
2502         struct ps2dev *ps2dev = &psmouse->ps2dev;
2503         char param[2] = {0x64, 0x28};
2504         int ret = -1;
2505
2506         /* enter absolute mode */
2507         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2508             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                 goto error;
2512         }
2513
2514         /* T.B.D. Decread noise packet number, delete in the future */
2515         if (alps_exit_command_mode(psmouse) ||
2516             alps_enter_command_mode(psmouse) ||
2517             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2518                 goto error;
2519         }
2520         alps_exit_command_mode(psmouse);
2521
2522         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2523
2524 error:
2525         alps_exit_command_mode(psmouse);
2526         return ret;
2527 }
2528
2529 static int alps_set_protocol(struct psmouse *psmouse,
2530                              struct alps_data *priv,
2531                              const struct alps_protocol_info *protocol)
2532 {
2533         psmouse->private = priv;
2534
2535         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2536
2537         priv->proto_version = protocol->version;
2538         priv->byte0 = protocol->byte0;
2539         priv->mask0 = protocol->mask0;
2540         priv->flags = protocol->flags;
2541
2542         priv->x_max = 2000;
2543         priv->y_max = 1400;
2544         priv->x_bits = 15;
2545         priv->y_bits = 11;
2546
2547         switch (priv->proto_version) {
2548         case ALPS_PROTO_V1:
2549         case ALPS_PROTO_V2:
2550                 priv->hw_init = alps_hw_init_v1_v2;
2551                 priv->process_packet = alps_process_packet_v1_v2;
2552                 priv->set_abs_params = alps_set_abs_params_st;
2553                 priv->x_max = 1023;
2554                 priv->y_max = 767;
2555                 break;
2556
2557         case ALPS_PROTO_V3:
2558                 priv->hw_init = alps_hw_init_v3;
2559                 priv->process_packet = alps_process_packet_v3;
2560                 priv->set_abs_params = alps_set_abs_params_mt;
2561                 priv->decode_fields = alps_decode_pinnacle;
2562                 priv->nibble_commands = alps_v3_nibble_commands;
2563                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2564                 break;
2565
2566         case ALPS_PROTO_V3_RUSHMORE:
2567                 priv->hw_init = alps_hw_init_rushmore_v3;
2568                 priv->process_packet = alps_process_packet_v3;
2569                 priv->set_abs_params = alps_set_abs_params_mt;
2570                 priv->decode_fields = alps_decode_rushmore;
2571                 priv->nibble_commands = alps_v3_nibble_commands;
2572                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2573                 priv->x_bits = 16;
2574                 priv->y_bits = 12;
2575
2576                 if (alps_probe_trackstick_v3(psmouse,
2577                                              ALPS_REG_BASE_RUSHMORE) < 0)
2578                         priv->flags &= ~ALPS_DUALPOINT;
2579
2580                 break;
2581
2582         case ALPS_PROTO_V4:
2583                 priv->hw_init = alps_hw_init_v4;
2584                 priv->process_packet = alps_process_packet_v4;
2585                 priv->set_abs_params = alps_set_abs_params_mt;
2586                 priv->nibble_commands = alps_v4_nibble_commands;
2587                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2588                 break;
2589
2590         case ALPS_PROTO_V5:
2591                 priv->hw_init = alps_hw_init_dolphin_v1;
2592                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2593                 priv->decode_fields = alps_decode_dolphin;
2594                 priv->set_abs_params = alps_set_abs_params_mt;
2595                 priv->nibble_commands = alps_v3_nibble_commands;
2596                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2597                 priv->x_bits = 23;
2598                 priv->y_bits = 12;
2599
2600                 if (alps_dolphin_get_device_area(psmouse, priv))
2601                         return -EIO;
2602
2603                 break;
2604
2605         case ALPS_PROTO_V6:
2606                 priv->hw_init = alps_hw_init_v6;
2607                 priv->process_packet = alps_process_packet_v6;
2608                 priv->set_abs_params = alps_set_abs_params_st;
2609                 priv->nibble_commands = alps_v6_nibble_commands;
2610                 priv->x_max = 2047;
2611                 priv->y_max = 1535;
2612                 break;
2613
2614         case ALPS_PROTO_V7:
2615                 priv->hw_init = alps_hw_init_v7;
2616                 priv->process_packet = alps_process_packet_v7;
2617                 priv->decode_fields = alps_decode_packet_v7;
2618                 priv->set_abs_params = alps_set_abs_params_v7;
2619                 priv->nibble_commands = alps_v3_nibble_commands;
2620                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2621                 priv->x_max = 0xfff;
2622                 priv->y_max = 0x7ff;
2623
2624                 if (priv->fw_ver[1] != 0xba)
2625                         priv->flags |= ALPS_BUTTONPAD;
2626
2627                 break;
2628
2629         case ALPS_PROTO_V8:
2630                 priv->hw_init = alps_hw_init_ss4_v2;
2631                 priv->process_packet = alps_process_packet_ss4_v2;
2632                 priv->decode_fields = alps_decode_ss4_v2;
2633                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2634                 priv->nibble_commands = alps_v3_nibble_commands;
2635                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2636
2637                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2638                         return -EIO;
2639
2640                 break;
2641         }
2642
2643         return 0;
2644 }
2645
2646 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2647                                                          unsigned char *ec)
2648 {
2649         const struct alps_model_info *model;
2650         int i;
2651
2652         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2653                 model = &alps_model_data[i];
2654
2655                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2656                     (!model->command_mode_resp ||
2657                      model->command_mode_resp == ec[2])) {
2658
2659                         return &model->protocol_info;
2660                 }
2661         }
2662
2663         return NULL;
2664 }
2665
2666 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2667 {
2668         const struct alps_protocol_info *protocol;
2669         unsigned char e6[4], e7[4], ec[4];
2670         int error;
2671
2672         /*
2673          * First try "E6 report".
2674          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2675          * The bits 0-2 of the first byte will be 1s if some buttons are
2676          * pressed.
2677          */
2678         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2679                          PSMOUSE_CMD_SETSCALE11, e6))
2680                 return -EIO;
2681
2682         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2683                 return -EINVAL;
2684
2685         /*
2686          * Now get the "E7" and "EC" reports.  These will uniquely identify
2687          * most ALPS touchpads.
2688          */
2689         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2690                          PSMOUSE_CMD_SETSCALE21, e7) ||
2691             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2692                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2693             alps_exit_command_mode(psmouse))
2694                 return -EIO;
2695
2696         protocol = alps_match_table(e7, ec);
2697         if (!protocol) {
2698                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2699                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2700                         protocol = &alps_v5_protocol_data;
2701                 } else if (ec[0] == 0x88 &&
2702                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2703                         protocol = &alps_v7_protocol_data;
2704                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2705                         protocol = &alps_v3_rushmore_data;
2706                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2707                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2708                         protocol = &alps_v3_protocol_data;
2709                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2710                            e7[2] == 0x14 && ec[1] == 0x02) {
2711                         protocol = &alps_v8_protocol_data;
2712                 } else {
2713                         psmouse_dbg(psmouse,
2714                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2715                         return -EINVAL;
2716                 }
2717         }
2718
2719         if (priv) {
2720                 /* Save the Firmware version */
2721                 memcpy(priv->fw_ver, ec, 3);
2722                 error = alps_set_protocol(psmouse, priv, protocol);
2723                 if (error)
2724                         return error;
2725         }
2726
2727         return 0;
2728 }
2729
2730 static int alps_reconnect(struct psmouse *psmouse)
2731 {
2732         struct alps_data *priv = psmouse->private;
2733
2734         psmouse_reset(psmouse);
2735
2736         if (alps_identify(psmouse, priv) < 0)
2737                 return -1;
2738
2739         return priv->hw_init(psmouse);
2740 }
2741
2742 static void alps_disconnect(struct psmouse *psmouse)
2743 {
2744         struct alps_data *priv = psmouse->private;
2745
2746         psmouse_reset(psmouse);
2747         del_timer_sync(&priv->timer);
2748         if (priv->dev2)
2749                 input_unregister_device(priv->dev2);
2750         if (!IS_ERR_OR_NULL(priv->dev3))
2751                 input_unregister_device(priv->dev3);
2752         kfree(priv);
2753 }
2754
2755 static void alps_set_abs_params_st(struct alps_data *priv,
2756                                    struct input_dev *dev1)
2757 {
2758         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2759         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2760         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2761 }
2762
2763 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2764                                           struct input_dev *dev1)
2765 {
2766         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2767         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2768
2769         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2770         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2771
2772         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2773         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2774 }
2775
2776 static void alps_set_abs_params_mt(struct alps_data *priv,
2777                                    struct input_dev *dev1)
2778 {
2779         alps_set_abs_params_mt_common(priv, dev1);
2780         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2781
2782         input_mt_init_slots(dev1, MAX_TOUCHES,
2783                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2784                                 INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2785 }
2786
2787 static void alps_set_abs_params_v7(struct alps_data *priv,
2788                                    struct input_dev *dev1)
2789 {
2790         alps_set_abs_params_mt_common(priv, dev1);
2791         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2792
2793         input_mt_init_slots(dev1, MAX_TOUCHES,
2794                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2795                                 INPUT_MT_TRACK);
2796
2797         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2798 }
2799
2800 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2801                                        struct input_dev *dev1)
2802 {
2803         alps_set_abs_params_mt_common(priv, dev1);
2804         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2805         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2806
2807         input_mt_init_slots(dev1, MAX_TOUCHES,
2808                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2809                                 INPUT_MT_TRACK);
2810 }
2811
2812 int alps_init(struct psmouse *psmouse)
2813 {
2814         struct alps_data *priv = psmouse->private;
2815         struct input_dev *dev1 = psmouse->dev;
2816         int error;
2817
2818         error = priv->hw_init(psmouse);
2819         if (error)
2820                 goto init_fail;
2821
2822         /*
2823          * Undo part of setup done for us by psmouse core since touchpad
2824          * is not a relative device.
2825          */
2826         __clear_bit(EV_REL, dev1->evbit);
2827         __clear_bit(REL_X, dev1->relbit);
2828         __clear_bit(REL_Y, dev1->relbit);
2829
2830         /*
2831          * Now set up our capabilities.
2832          */
2833         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2834         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2835         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2836         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2837                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2838
2839         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2840
2841         priv->set_abs_params(priv, dev1);
2842
2843         if (priv->flags & ALPS_WHEEL) {
2844                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2845                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2846         }
2847
2848         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2849                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2850                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2851         }
2852
2853         if (priv->flags & ALPS_FOUR_BUTTONS) {
2854                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2855                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2856                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2857                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2858         } else if (priv->flags & ALPS_BUTTONPAD) {
2859                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2860                 clear_bit(BTN_RIGHT, dev1->keybit);
2861         } else {
2862                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2863         }
2864
2865         if (priv->flags & ALPS_DUALPOINT) {
2866                 struct input_dev *dev2;
2867
2868                 dev2 = input_allocate_device();
2869                 if (!dev2) {
2870                         psmouse_err(psmouse,
2871                                     "failed to allocate trackstick device\n");
2872                         error = -ENOMEM;
2873                         goto init_fail;
2874                 }
2875
2876                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2877                          psmouse->ps2dev.serio->phys);
2878                 dev2->phys = priv->phys2;
2879
2880                 /*
2881                  * format of input device name is: "protocol vendor name"
2882                  * see function psmouse_switch_protocol() in psmouse-base.c
2883                  */
2884                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2885
2886                 dev2->id.bustype = BUS_I8042;
2887                 dev2->id.vendor  = 0x0002;
2888                 dev2->id.product = PSMOUSE_ALPS;
2889                 dev2->id.version = priv->proto_version;
2890                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2891
2892                 input_set_capability(dev2, EV_REL, REL_X);
2893                 input_set_capability(dev2, EV_REL, REL_Y);
2894                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2895                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2896                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2897
2898                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2899                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2900
2901                 error = input_register_device(dev2);
2902                 if (error) {
2903                         psmouse_err(psmouse,
2904                                     "failed to register trackstick device: %d\n",
2905                                     error);
2906                         input_free_device(dev2);
2907                         goto init_fail;
2908                 }
2909
2910                 priv->dev2 = dev2;
2911         }
2912
2913         priv->psmouse = psmouse;
2914
2915         INIT_DELAYED_WORK(&priv->dev3_register_work,
2916                           alps_register_bare_ps2_mouse);
2917
2918         psmouse->protocol_handler = alps_process_byte;
2919         psmouse->poll = alps_poll;
2920         psmouse->disconnect = alps_disconnect;
2921         psmouse->reconnect = alps_reconnect;
2922         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2923
2924         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2925         psmouse->resync_time = 0;
2926
2927         /* Allow 2 invalid packets without resetting device */
2928         psmouse->resetafter = psmouse->pktsize * 2;
2929
2930         return 0;
2931
2932 init_fail:
2933         psmouse_reset(psmouse);
2934         /*
2935          * Even though we did not allocate psmouse->private we do free
2936          * it here.
2937          */
2938         kfree(psmouse->private);
2939         psmouse->private = NULL;
2940         return error;
2941 }
2942
2943 int alps_detect(struct psmouse *psmouse, bool set_properties)
2944 {
2945         struct alps_data *priv;
2946         int error;
2947
2948         error = alps_identify(psmouse, NULL);
2949         if (error)
2950                 return error;
2951
2952         /*
2953          * Reset the device to make sure it is fully operational:
2954          * on some laptops, like certain Dell Latitudes, we may
2955          * fail to properly detect presence of trackstick if device
2956          * has not been reset.
2957          */
2958         psmouse_reset(psmouse);
2959
2960         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2961         if (!priv)
2962                 return -ENOMEM;
2963
2964         error = alps_identify(psmouse, priv);
2965         if (error) {
2966                 kfree(priv);
2967                 return error;
2968         }
2969
2970         if (set_properties) {
2971                 psmouse->vendor = "ALPS";
2972                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
2973                                 "DualPoint TouchPad" : "GlidePoint";
2974                 psmouse->model = priv->proto_version;
2975         } else {
2976                 /*
2977                  * Destroy alps_data structure we allocated earlier since
2978                  * this was just a "trial run". Otherwise we'll keep it
2979                  * to be used by alps_init() which has to be called if
2980                  * we succeed and set_properties is true.
2981                  */
2982                 kfree(priv);
2983                 psmouse->private = NULL;
2984         }
2985
2986         return 0;
2987 }
2988