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                 /* Detect false-postive touches where x & y report max value */
 945                 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
 946                         mt[1].x = 0;
 947                         /* y gets set to 0 at the end of this function */
 948                 }
 949                 break;
 950
 951         case V7_PACKET_ID_MULTI:
 952                 mt[1].x &= ~0x003F;
 953                 mt[1].y &= ~0x0020;
 954                 mt[1].y |= ((pkt[4] & 0x02) << 4);
 955                 mt[1].y |= 0x001F;
 956                 break;
 957
 958         case V7_PACKET_ID_NEW:
 959                 mt[1].x &= ~0x003F;
 960                 mt[1].x |= (pkt[0] & 0x20);
 961                 mt[1].y |= 0x000F;
 962                 break;
 963         }
 964
 965         mt[0].y = 0x7FF - mt[0].y;
 966         mt[1].y = 0x7FF - mt[1].y;
 967 }
 968
 969 static int alps_get_mt_count(struct input_mt_pos *mt)
 970 {
 971         int i, fingers = 0;
 972
 973         for (i = 0; i < MAX_TOUCHES; i++) {
 974                 if (mt[i].x != 0 || mt[i].y != 0)
 975                         fingers++;
 976         }
 977
 978         return fingers;
 979 }
 980
 981 static int alps_decode_packet_v7(struct alps_fields *f,
 982                                   unsigned char *p,
 983                                   struct psmouse *psmouse)
 984 {
 985         struct alps_data *priv = psmouse->private;
 986         unsigned char pkt_id;
 987
 988         pkt_id = alps_get_packet_id_v7(p);
 989         if (pkt_id == V7_PACKET_ID_IDLE)
 990                 return 0;
 991         if (pkt_id == V7_PACKET_ID_UNKNOWN)
 992                 return -1;
 993         /*
 994          * NEW packets are send to indicate a discontinuity in the finger
 995          * coordinate reporting. Specifically a finger may have moved from
 996          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
 997          * us.
 998          *
 999          * NEW packets have 3 problems:
1000          * 1) They do not contain middle / right button info (on non clickpads)
1001          *    this can be worked around by preserving the old button state
1002          * 2) They do not contain an accurate fingercount, and they are
1003          *    typically send when the number of fingers changes. We cannot use
1004          *    the old finger count as that may mismatch with the amount of
1005          *    touch coordinates we've available in the NEW packet
1006          * 3) Their x data for the second touch is inaccurate leading to
1007          *    a possible jump of the x coordinate by 16 units when the first
1008          *    non NEW packet comes in
1009          * Since problems 2 & 3 cannot be worked around, just ignore them.
1010          */
1011         if (pkt_id == V7_PACKET_ID_NEW)
1012                 return 1;
1013
1014         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1015
1016         if (pkt_id == V7_PACKET_ID_TWO)
1017                 f->fingers = alps_get_mt_count(f->mt);
1018         else /* pkt_id == V7_PACKET_ID_MULTI */
1019                 f->fingers = 3 + (p[5] & 0x03);
1020
1021         f->left = (p[0] & 0x80) >> 7;
1022         if (priv->flags & ALPS_BUTTONPAD) {
1023                 if (p[0] & 0x20)
1024                         f->fingers++;
1025                 if (p[0] & 0x10)
1026                         f->fingers++;
1027         } else {
1028                 f->right = (p[0] & 0x20) >> 5;
1029                 f->middle = (p[0] & 0x10) >> 4;
1030         }
1031
1032         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1033         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1034                 f->mt[0].x = f->mt[1].x;
1035                 f->mt[0].y = f->mt[1].y;
1036                 f->mt[1].x = 0;
1037                 f->mt[1].y = 0;
1038         }
1039
1040         return 0;
1041 }
1042
1043 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1044 {
1045         struct alps_data *priv = psmouse->private;
1046         unsigned char *packet = psmouse->packet;
1047         struct input_dev *dev2 = priv->dev2;
1048         int x, y, z, left, right, middle;
1049
1050         /* It should be a DualPoint when received trackstick packet */
1051         if (!(priv->flags & ALPS_DUALPOINT)) {
1052                 psmouse_warn(psmouse,
1053                              "Rejected trackstick packet from non DualPoint device");
1054                 return;
1055         }
1056
1057         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1058         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1059             ((packet[3] & 0x20) << 1);
1060         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1061
1062         left = (packet[1] & 0x01);
1063         right = (packet[1] & 0x02) >> 1;
1064         middle = (packet[1] & 0x04) >> 2;
1065
1066         /* Divide 2 since trackpoint's speed is too fast */
1067         input_report_rel(dev2, REL_X, (char)x / 2);
1068         input_report_rel(dev2, REL_Y, -((char)y / 2));
1069
1070         input_report_key(dev2, BTN_LEFT, left);
1071         input_report_key(dev2, BTN_RIGHT, right);
1072         input_report_key(dev2, BTN_MIDDLE, middle);
1073
1074         input_sync(dev2);
1075 }
1076
1077 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1078 {
1079         struct alps_data *priv = psmouse->private;
1080         struct input_dev *dev = psmouse->dev;
1081         struct alps_fields *f = &priv->f;
1082
1083         memset(f, 0, sizeof(*f));
1084
1085         if (priv->decode_fields(f, psmouse->packet, psmouse))
1086                 return;
1087
1088         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1089
1090         input_mt_report_finger_count(dev, f->fingers);
1091
1092         input_report_key(dev, BTN_LEFT, f->left);
1093         input_report_key(dev, BTN_RIGHT, f->right);
1094         input_report_key(dev, BTN_MIDDLE, f->middle);
1095
1096         input_sync(dev);
1097 }
1098
1099 static void alps_process_packet_v7(struct psmouse *psmouse)
1100 {
1101         unsigned char *packet = psmouse->packet;
1102
1103         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1104                 alps_process_trackstick_packet_v7(psmouse);
1105         else
1106                 alps_process_touchpad_packet_v7(psmouse);
1107 }
1108
1109 static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)
1110 {
1111         unsigned char pkt_id = SS4_PACKET_ID_IDLE;
1112
1113         if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&
1114             (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) {
1115                 pkt_id = SS4_PACKET_ID_IDLE;
1116         } else if (!(byte[3] & 0x10)) {
1117                 pkt_id = SS4_PACKET_ID_ONE;
1118         } else if (!(byte[3] & 0x20)) {
1119                 pkt_id = SS4_PACKET_ID_TWO;
1120         } else {
1121                 pkt_id = SS4_PACKET_ID_MULTI;
1122         }
1123
1124         return pkt_id;
1125 }
1126
1127 static int alps_decode_ss4_v2(struct alps_fields *f,
1128                               unsigned char *p, struct psmouse *psmouse)
1129 {
1130         struct alps_data *priv = psmouse->private;
1131         unsigned char pkt_id;
1132         unsigned int no_data_x, no_data_y;
1133
1134         pkt_id = alps_get_pkt_id_ss4_v2(p);
1135
1136         /* Current packet is 1Finger coordinate packet */
1137         switch (pkt_id) {
1138         case SS4_PACKET_ID_ONE:
1139                 f->mt[0].x = SS4_1F_X_V2(p);
1140                 f->mt[0].y = SS4_1F_Y_V2(p);
1141                 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1142                 f->fingers = 1;
1143                 f->first_mp = 0;
1144                 f->is_mp = 0;
1145                 break;
1146
1147         case SS4_PACKET_ID_TWO:
1148                 if (priv->flags & ALPS_BUTTONPAD) {
1149                         f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1150                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1151                         f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1152                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1153                 } else {
1154                         f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1155                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1156                         f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1157                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1158                 }
1159                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1160
1161                 if (SS4_IS_MF_CONTINUE(p)) {
1162                         f->first_mp = 1;
1163                 } else {
1164                         f->fingers = 2;
1165                         f->first_mp = 0;
1166                 }
1167                 f->is_mp = 0;
1168
1169                 break;
1170
1171         case SS4_PACKET_ID_MULTI:
1172                 if (priv->flags & ALPS_BUTTONPAD) {
1173                         f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1174                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1175                         f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1176                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1177                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1178                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1179                 } else {
1180                         f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1181                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1182                         f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1183                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1184                         no_data_x = SS4_MFPACKET_NO_AX;
1185                         no_data_y = SS4_MFPACKET_NO_AY;
1186                 }
1187
1188                 f->first_mp = 0;
1189                 f->is_mp = 1;
1190
1191                 if (SS4_IS_5F_DETECTED(p)) {
1192                         f->fingers = 5;
1193                 } else if (f->mt[3].x == no_data_x &&
1194                              f->mt[3].y == no_data_y) {
1195                         f->mt[3].x = 0;
1196                         f->mt[3].y = 0;
1197                         f->fingers = 3;
1198                 } else {
1199                         f->fingers = 4;
1200                 }
1201                 break;
1202
1203         case SS4_PACKET_ID_IDLE:
1204         default:
1205                 memset(f, 0, sizeof(struct alps_fields));
1206                 break;
1207         }
1208
1209         f->left = !!(SS4_BTN_V2(p) & 0x01);
1210         if (!(priv->flags & ALPS_BUTTONPAD)) {
1211                 f->right = !!(SS4_BTN_V2(p) & 0x02);
1212                 f->middle = !!(SS4_BTN_V2(p) & 0x04);
1213         }
1214
1215         return 0;
1216 }
1217
1218 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1219 {
1220         struct alps_data *priv = psmouse->private;
1221         unsigned char *packet = psmouse->packet;
1222         struct input_dev *dev = psmouse->dev;
1223         struct alps_fields *f = &priv->f;
1224
1225         memset(f, 0, sizeof(struct alps_fields));
1226         priv->decode_fields(f, packet, psmouse);
1227         if (priv->multi_packet) {
1228                 /*
1229                  * Sometimes the first packet will indicate a multi-packet
1230                  * sequence, but sometimes the next multi-packet would not
1231                  * come. Check for this, and when it happens process the
1232                  * position packet as usual.
1233                  */
1234                 if (f->is_mp) {
1235                         /* Now process the 1st packet */
1236                         priv->decode_fields(f, priv->multi_data, psmouse);
1237                 } else {
1238                         priv->multi_packet = 0;
1239                 }
1240         }
1241
1242         /*
1243          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1244          * When it is set, it means 2nd packet comes without 1st packet come.
1245          */
1246         if (f->is_mp)
1247                 return;
1248
1249         /* Save the first packet */
1250         if (!priv->multi_packet && f->first_mp) {
1251                 priv->multi_packet = 1;
1252                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1253                 return;
1254         }
1255
1256         priv->multi_packet = 0;
1257
1258         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1259
1260         input_mt_report_finger_count(dev, f->fingers);
1261
1262         input_report_key(dev, BTN_LEFT, f->left);
1263         input_report_key(dev, BTN_RIGHT, f->right);
1264         input_report_key(dev, BTN_MIDDLE, f->middle);
1265
1266         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1267         input_sync(dev);
1268 }
1269
1270 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1271 {
1272         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1273                 return false;
1274         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1275                 return false;
1276         return true;
1277 }
1278
1279 static DEFINE_MUTEX(alps_mutex);
1280
1281 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1282 {
1283         struct alps_data *priv =
1284                 container_of(work, struct alps_data, dev3_register_work.work);
1285         struct psmouse *psmouse = priv->psmouse;
1286         struct input_dev *dev3;
1287         int error = 0;
1288
1289         mutex_lock(&alps_mutex);
1290
1291         if (priv->dev3)
1292                 goto out;
1293
1294         dev3 = input_allocate_device();
1295         if (!dev3) {
1296                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1297                 error = -ENOMEM;
1298                 goto out;
1299         }
1300
1301         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1302                  psmouse->ps2dev.serio->phys,
1303                  (priv->dev2 ? "input2" : "input1"));
1304         dev3->phys = priv->phys3;
1305
1306         /*
1307          * format of input device name is: "protocol vendor name"
1308          * see function psmouse_switch_protocol() in psmouse-base.c
1309          */
1310         dev3->name = "PS/2 ALPS Mouse";
1311
1312         dev3->id.bustype = BUS_I8042;
1313         dev3->id.vendor  = 0x0002;
1314         dev3->id.product = PSMOUSE_PS2;
1315         dev3->id.version = 0x0000;
1316         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1317
1318         input_set_capability(dev3, EV_REL, REL_X);
1319         input_set_capability(dev3, EV_REL, REL_Y);
1320         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1321         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1322         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1323
1324         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1325
1326         error = input_register_device(dev3);
1327         if (error) {
1328                 psmouse_err(psmouse,
1329                             "failed to register secondary device: %d\n",
1330                             error);
1331                 input_free_device(dev3);
1332                 goto out;
1333         }
1334
1335         priv->dev3 = dev3;
1336
1337 out:
1338         /*
1339          * Save the error code so that we can detect that we
1340          * already tried to create the device.
1341          */
1342         if (error)
1343                 priv->dev3 = ERR_PTR(error);
1344
1345         mutex_unlock(&alps_mutex);
1346 }
1347
1348 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1349                                         unsigned char packet[],
1350                                         bool report_buttons)
1351 {
1352         struct alps_data *priv = psmouse->private;
1353         struct input_dev *dev, *dev2 = NULL;
1354
1355         /* Figure out which device to use to report the bare packet */
1356         if (priv->proto_version == ALPS_PROTO_V2 &&
1357             (priv->flags & ALPS_DUALPOINT)) {
1358                 /* On V2 devices the DualPoint Stick reports bare packets */
1359                 dev = priv->dev2;
1360                 dev2 = psmouse->dev;
1361         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1362                 /* Register dev3 mouse if we received PS/2 packet first time */
1363                 if (!IS_ERR(priv->dev3))
1364                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1365                                            0);
1366                 return;
1367         } else {
1368                 dev = priv->dev3;
1369         }
1370
1371         if (report_buttons)
1372                 alps_report_buttons(dev, dev2,
1373                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1374
1375         input_report_rel(dev, REL_X,
1376                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1377         input_report_rel(dev, REL_Y,
1378                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1379
1380         input_sync(dev);
1381 }
1382
1383 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1384 {
1385         struct alps_data *priv = psmouse->private;
1386
1387         if (psmouse->pktcnt < 6)
1388                 return PSMOUSE_GOOD_DATA;
1389
1390         if (psmouse->pktcnt == 6) {
1391                 /*
1392                  * Start a timer to flush the packet if it ends up last
1393                  * 6-byte packet in the stream. Timer needs to fire
1394                  * psmouse core times out itself. 20 ms should be enough
1395                  * to decide if we are getting more data or not.
1396                  */
1397                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1398                 return PSMOUSE_GOOD_DATA;
1399         }
1400
1401         del_timer(&priv->timer);
1402
1403         if (psmouse->packet[6] & 0x80) {
1404
1405                 /*
1406                  * Highest bit is set - that means we either had
1407                  * complete ALPS packet and this is start of the
1408                  * next packet or we got garbage.
1409                  */
1410
1411                 if (((psmouse->packet[3] |
1412                       psmouse->packet[4] |
1413                       psmouse->packet[5]) & 0x80) ||
1414                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1415                         psmouse_dbg(psmouse,
1416                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1417                                     psmouse->packet + 3);
1418                         return PSMOUSE_BAD_DATA;
1419                 }
1420
1421                 priv->process_packet(psmouse);
1422
1423                 /* Continue with the next packet */
1424                 psmouse->packet[0] = psmouse->packet[6];
1425                 psmouse->pktcnt = 1;
1426
1427         } else {
1428
1429                 /*
1430                  * High bit is 0 - that means that we indeed got a PS/2
1431                  * packet in the middle of ALPS packet.
1432                  *
1433                  * There is also possibility that we got 6-byte ALPS
1434                  * packet followed  by 3-byte packet from trackpoint. We
1435                  * can not distinguish between these 2 scenarios but
1436                  * because the latter is unlikely to happen in course of
1437                  * normal operation (user would need to press all
1438                  * buttons on the pad and start moving trackpoint
1439                  * without touching the pad surface) we assume former.
1440                  * Even if we are wrong the wost thing that would happen
1441                  * the cursor would jump but we should not get protocol
1442                  * de-synchronization.
1443                  */
1444
1445                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1446                                             false);
1447
1448                 /*
1449                  * Continue with the standard ALPS protocol handling,
1450                  * but make sure we won't process it as an interleaved
1451                  * packet again, which may happen if all buttons are
1452                  * pressed. To avoid this let's reset the 4th bit which
1453                  * is normally 1.
1454                  */
1455                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1456                 psmouse->pktcnt = 4;
1457         }
1458
1459         return PSMOUSE_GOOD_DATA;
1460 }
1461
1462 static void alps_flush_packet(unsigned long data)
1463 {
1464         struct psmouse *psmouse = (struct psmouse *)data;
1465         struct alps_data *priv = psmouse->private;
1466
1467         serio_pause_rx(psmouse->ps2dev.serio);
1468
1469         if (psmouse->pktcnt == psmouse->pktsize) {
1470
1471                 /*
1472                  * We did not any more data in reasonable amount of time.
1473                  * Validate the last 3 bytes and process as a standard
1474                  * ALPS packet.
1475                  */
1476                 if ((psmouse->packet[3] |
1477                      psmouse->packet[4] |
1478                      psmouse->packet[5]) & 0x80) {
1479                         psmouse_dbg(psmouse,
1480                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1481                                     psmouse->packet + 3);
1482                 } else {
1483                         priv->process_packet(psmouse);
1484                 }
1485                 psmouse->pktcnt = 0;
1486         }
1487
1488         serio_continue_rx(psmouse->ps2dev.serio);
1489 }
1490
1491 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1492 {
1493         struct alps_data *priv = psmouse->private;
1494
1495         /*
1496          * Check if we are dealing with a bare PS/2 packet, presumably from
1497          * a device connected to the external PS/2 port. Because bare PS/2
1498          * protocol does not have enough constant bits to self-synchronize
1499          * properly we only do this if the device is fully synchronized.
1500          * Can not distinguish V8's first byte from PS/2 packet's
1501          */
1502         if (priv->proto_version != ALPS_PROTO_V8 &&
1503             !psmouse->out_of_sync_cnt &&
1504             (psmouse->packet[0] & 0xc8) == 0x08) {
1505
1506                 if (psmouse->pktcnt == 3) {
1507                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1508                                                     true);
1509                         return PSMOUSE_FULL_PACKET;
1510                 }
1511                 return PSMOUSE_GOOD_DATA;
1512         }
1513
1514         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1515
1516         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1517             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1518                 return alps_handle_interleaved_ps2(psmouse);
1519         }
1520
1521         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1522                 psmouse_dbg(psmouse,
1523                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1524                             psmouse->packet[0], priv->mask0, priv->byte0);
1525                 return PSMOUSE_BAD_DATA;
1526         }
1527
1528         /* Bytes 2 - pktsize should have 0 in the highest bit */
1529         if (priv->proto_version < ALPS_PROTO_V5 &&
1530             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1531             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1532                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1533                             psmouse->pktcnt - 1,
1534                             psmouse->packet[psmouse->pktcnt - 1]);
1535
1536                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1537                     psmouse->pktcnt == psmouse->pktsize) {
1538                         /*
1539                          * Some Dell boxes, such as Latitude E6440 or E7440
1540                          * with closed lid, quite often smash last byte of
1541                          * otherwise valid packet with 0xff. Given that the
1542                          * next packet is very likely to be valid let's
1543                          * report PSMOUSE_FULL_PACKET but not process data,
1544                          * rather than reporting PSMOUSE_BAD_DATA and
1545                          * filling the logs.
1546                          */
1547                         return PSMOUSE_FULL_PACKET;
1548                 }
1549
1550                 return PSMOUSE_BAD_DATA;
1551         }
1552
1553         if ((priv->proto_version == ALPS_PROTO_V7 &&
1554                         !alps_is_valid_package_v7(psmouse)) ||
1555             (priv->proto_version == ALPS_PROTO_V8 &&
1556                         !alps_is_valid_package_ss4_v2(psmouse))) {
1557                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1558                             psmouse->pktcnt - 1,
1559                             psmouse->packet[psmouse->pktcnt - 1]);
1560                 return PSMOUSE_BAD_DATA;
1561         }
1562
1563         if (psmouse->pktcnt == psmouse->pktsize) {
1564                 priv->process_packet(psmouse);
1565                 return PSMOUSE_FULL_PACKET;
1566         }
1567
1568         return PSMOUSE_GOOD_DATA;
1569 }
1570
1571 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1572 {
1573         struct ps2dev *ps2dev = &psmouse->ps2dev;
1574         struct alps_data *priv = psmouse->private;
1575         int command;
1576         unsigned char *param;
1577         unsigned char dummy[4];
1578
1579         BUG_ON(nibble > 0xf);
1580
1581         command = priv->nibble_commands[nibble].command;
1582         param = (command & 0x0f00) ?
1583                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1584
1585         if (ps2_command(ps2dev, param, command))
1586                 return -1;
1587
1588         return 0;
1589 }
1590
1591 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1592 {
1593         struct ps2dev *ps2dev = &psmouse->ps2dev;
1594         struct alps_data *priv = psmouse->private;
1595         int i, nibble;
1596
1597         if (ps2_command(ps2dev, NULL, priv->addr_command))
1598                 return -1;
1599
1600         for (i = 12; i >= 0; i -= 4) {
1601                 nibble = (addr >> i) & 0xf;
1602                 if (alps_command_mode_send_nibble(psmouse, nibble))
1603                         return -1;
1604         }
1605
1606         return 0;
1607 }
1608
1609 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1610 {
1611         struct ps2dev *ps2dev = &psmouse->ps2dev;
1612         unsigned char param[4];
1613
1614         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1615                 return -1;
1616
1617         /*
1618          * The address being read is returned in the first two bytes
1619          * of the result. Check that this address matches the expected
1620          * address.
1621          */
1622         if (addr != ((param[0] << 8) | param[1]))
1623                 return -1;
1624
1625         return param[2];
1626 }
1627
1628 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1629 {
1630         if (alps_command_mode_set_addr(psmouse, addr))
1631                 return -1;
1632         return __alps_command_mode_read_reg(psmouse, addr);
1633 }
1634
1635 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1636 {
1637         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1638                 return -1;
1639         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1640                 return -1;
1641         return 0;
1642 }
1643
1644 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1645                                        u8 value)
1646 {
1647         if (alps_command_mode_set_addr(psmouse, addr))
1648                 return -1;
1649         return __alps_command_mode_write_reg(psmouse, value);
1650 }
1651
1652 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1653                         int repeated_command, unsigned char *param)
1654 {
1655         struct ps2dev *ps2dev = &psmouse->ps2dev;
1656
1657         param[0] = 0;
1658         if (init_command && ps2_command(ps2dev, param, init_command))
1659                 return -EIO;
1660
1661         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1662             ps2_command(ps2dev,  NULL, repeated_command) ||
1663             ps2_command(ps2dev,  NULL, repeated_command))
1664                 return -EIO;
1665
1666         param[0] = param[1] = param[2] = 0xff;
1667         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1668                 return -EIO;
1669
1670         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1671                     repeated_command, param);
1672         return 0;
1673 }
1674
1675 static bool alps_check_valid_firmware_id(unsigned char id[])
1676 {
1677         if (id[0] == 0x73)
1678                 return true;
1679
1680         if (id[0] == 0x88 &&
1681             (id[1] == 0x07 ||
1682              id[1] == 0x08 ||
1683              (id[1] & 0xf0) == 0xb0 ||
1684              (id[1] & 0xf0) == 0xc0)) {
1685                 return true;
1686         }
1687
1688         return false;
1689 }
1690
1691 static int alps_enter_command_mode(struct psmouse *psmouse)
1692 {
1693         unsigned char param[4];
1694
1695         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1696                 psmouse_err(psmouse, "failed to enter command mode\n");
1697                 return -1;
1698         }
1699
1700         if (!alps_check_valid_firmware_id(param)) {
1701                 psmouse_dbg(psmouse,
1702                             "unknown response while entering command mode\n");
1703                 return -1;
1704         }
1705         return 0;
1706 }
1707
1708 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1709 {
1710         struct ps2dev *ps2dev = &psmouse->ps2dev;
1711         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1712                 return -1;
1713         return 0;
1714 }
1715
1716 /*
1717  * For DualPoint devices select the device that should respond to
1718  * subsequent commands. It looks like glidepad is behind stickpointer,
1719  * I'd thought it would be other way around...
1720  */
1721 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1722 {
1723         struct ps2dev *ps2dev = &psmouse->ps2dev;
1724         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1725
1726         if (ps2_command(ps2dev, NULL, cmd) ||
1727             ps2_command(ps2dev, NULL, cmd) ||
1728             ps2_command(ps2dev, NULL, cmd) ||
1729             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1730                 return -1;
1731
1732         /* we may get 3 more bytes, just ignore them */
1733         ps2_drain(ps2dev, 3, 100);
1734
1735         return 0;
1736 }
1737
1738 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1739 {
1740         struct ps2dev *ps2dev = &psmouse->ps2dev;
1741
1742         /* Try ALPS magic knock - 4 disable before enable */
1743         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1744             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1745             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1746             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1747             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1748                 return -1;
1749
1750         /*
1751          * Switch mouse to poll (remote) mode so motion data will not
1752          * get in our way
1753          */
1754         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1755 }
1756
1757 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1758 {
1759         int i, nibble;
1760
1761         /*
1762          * b0-b11 are valid bits, send sequence is inverse.
1763          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1764          */
1765         for (i = 0; i <= 8; i += 4) {
1766                 nibble = (word >> i) & 0xf;
1767                 if (alps_command_mode_send_nibble(psmouse, nibble))
1768                         return -1;
1769         }
1770
1771         return 0;
1772 }
1773
1774 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1775                                        u16 addr, u16 value)
1776 {
1777         struct ps2dev *ps2dev = &psmouse->ps2dev;
1778
1779         /* 0x0A0 is the command to write the word */
1780         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1781             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1782             alps_monitor_mode_send_word(psmouse, addr) ||
1783             alps_monitor_mode_send_word(psmouse, value) ||
1784             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1785                 return -1;
1786
1787         return 0;
1788 }
1789
1790 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1791 {
1792         struct ps2dev *ps2dev = &psmouse->ps2dev;
1793
1794         if (enable) {
1795                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1796                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1797                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1798                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1799                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1800                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1801                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1802                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1803                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1804                         return -1;
1805         } else {
1806                 /* EC to exit monitor mode */
1807                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1808                         return -1;
1809         }
1810
1811         return 0;
1812 }
1813
1814 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1815 {
1816         u16 reg_val = 0x181;
1817         int ret = -1;
1818
1819         /* enter monitor mode, to write the register */
1820         if (alps_monitor_mode(psmouse, true))
1821                 return -1;
1822
1823         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1824
1825         if (alps_monitor_mode(psmouse, false))
1826                 ret = -1;
1827
1828         return ret;
1829 }
1830
1831 static int alps_get_status(struct psmouse *psmouse, char *param)
1832 {
1833         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1834         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1835                 return -1;
1836
1837         return 0;
1838 }
1839
1840 /*
1841  * Turn touchpad tapping on or off. The sequences are:
1842  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1843  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1844  * My guess that 0xE9 (GetInfo) is here as a sync point.
1845  * For models that also have stickpointer (DualPoints) its tapping
1846  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1847  * we don't fiddle with it.
1848  */
1849 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1850 {
1851         struct ps2dev *ps2dev = &psmouse->ps2dev;
1852         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1853         unsigned char tap_arg = enable ? 0x0A : 0x00;
1854         unsigned char param[4];
1855
1856         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1857             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1858             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1859             ps2_command(ps2dev, &tap_arg, cmd))
1860                 return -1;
1861
1862         if (alps_get_status(psmouse, param))
1863                 return -1;
1864
1865         return 0;
1866 }
1867
1868 /*
1869  * alps_poll() - poll the touchpad for current motion packet.
1870  * Used in resync.
1871  */
1872 static int alps_poll(struct psmouse *psmouse)
1873 {
1874         struct alps_data *priv = psmouse->private;
1875         unsigned char buf[sizeof(psmouse->packet)];
1876         bool poll_failed;
1877
1878         if (priv->flags & ALPS_PASS)
1879                 alps_passthrough_mode_v2(psmouse, true);
1880
1881         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1882                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1883
1884         if (priv->flags & ALPS_PASS)
1885                 alps_passthrough_mode_v2(psmouse, false);
1886
1887         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1888                 return -1;
1889
1890         if ((psmouse->badbyte & 0xc8) == 0x08) {
1891 /*
1892  * Poll the track stick ...
1893  */
1894                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1895                         return -1;
1896         }
1897
1898         memcpy(psmouse->packet, buf, sizeof(buf));
1899         return 0;
1900 }
1901
1902 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1903 {
1904         struct alps_data *priv = psmouse->private;
1905
1906         if ((priv->flags & ALPS_PASS) &&
1907             alps_passthrough_mode_v2(psmouse, true)) {
1908                 return -1;
1909         }
1910
1911         if (alps_tap_mode(psmouse, true)) {
1912                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1913                 return -1;
1914         }
1915
1916         if (alps_absolute_mode_v1_v2(psmouse)) {
1917                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1918                 return -1;
1919         }
1920
1921         if ((priv->flags & ALPS_PASS) &&
1922             alps_passthrough_mode_v2(psmouse, false)) {
1923                 return -1;
1924         }
1925
1926         /* ALPS needs stream mode, otherwise it won't report any data */
1927         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1928                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1929                 return -1;
1930         }
1931
1932         return 0;
1933 }
1934
1935 static int alps_hw_init_v6(struct psmouse *psmouse)
1936 {
1937         unsigned char param[2] = {0xC8, 0x14};
1938
1939         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1940         if (alps_passthrough_mode_v2(psmouse, true))
1941                 return -1;
1942
1943         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1944             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1945             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1946             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1947             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1948                 return -1;
1949
1950         if (alps_passthrough_mode_v2(psmouse, false))
1951                 return -1;
1952
1953         if (alps_absolute_mode_v6(psmouse)) {
1954                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1955                 return -1;
1956         }
1957
1958         return 0;
1959 }
1960
1961 /*
1962  * Enable or disable passthrough mode to the trackstick.
1963  */
1964 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1965                                     int reg_base, bool enable)
1966 {
1967         int reg_val, ret = -1;
1968
1969         if (alps_enter_command_mode(psmouse))
1970                 return -1;
1971
1972         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1973         if (reg_val == -1)
1974                 goto error;
1975
1976         if (enable)
1977                 reg_val |= 0x01;
1978         else
1979                 reg_val &= ~0x01;
1980
1981         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1982
1983 error:
1984         if (alps_exit_command_mode(psmouse))
1985                 ret = -1;
1986         return ret;
1987 }
1988
1989 /* Must be in command mode when calling this function */
1990 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1991 {
1992         int reg_val;
1993
1994         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1995         if (reg_val == -1)
1996                 return -1;
1997
1998         reg_val |= 0x06;
1999         if (__alps_command_mode_write_reg(psmouse, reg_val))
2000                 return -1;
2001
2002         return 0;
2003 }
2004
2005 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
2006 {
2007         int ret = -EIO, reg_val;
2008
2009         if (alps_enter_command_mode(psmouse))
2010                 goto error;
2011
2012         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2013         if (reg_val == -1)
2014                 goto error;
2015
2016         /* bit 7: trackstick is present */
2017         ret = reg_val & 0x80 ? 0 : -ENODEV;
2018
2019 error:
2020         alps_exit_command_mode(psmouse);
2021         return ret;
2022 }
2023
2024 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2025 {
2026         struct ps2dev *ps2dev = &psmouse->ps2dev;
2027         int ret = 0;
2028         unsigned char param[4];
2029
2030         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2031                 return -EIO;
2032
2033         /*
2034          * E7 report for the trackstick
2035          *
2036          * There have been reports of failures to seem to trace back
2037          * to the above trackstick check failing. When these occur
2038          * this E7 report fails, so when that happens we continue
2039          * with the assumption that there isn't a trackstick after
2040          * all.
2041          */
2042         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2043                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2044                 ret = -ENODEV;
2045         } else {
2046                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2047
2048                 /*
2049                  * Not sure what this does, but it is absolutely
2050                  * essential. Without it, the touchpad does not
2051                  * work at all and the trackstick just emits normal
2052                  * PS/2 packets.
2053                  */
2054                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2055                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2056                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2057                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2058                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2059                         psmouse_err(psmouse,
2060                                     "Error sending magic E6 sequence\n");
2061                         ret = -EIO;
2062                         goto error;
2063                 }
2064
2065                 /*
2066                  * This ensures the trackstick packets are in the format
2067                  * supported by this driver. If bit 1 isn't set the packet
2068                  * format is different.
2069                  */
2070                 if (alps_enter_command_mode(psmouse) ||
2071                     alps_command_mode_write_reg(psmouse,
2072                                                 reg_base + 0x08, 0x82) ||
2073                     alps_exit_command_mode(psmouse))
2074                         ret = -EIO;
2075         }
2076
2077 error:
2078         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2079                 ret = -EIO;
2080
2081         return ret;
2082 }
2083
2084 static int alps_hw_init_v3(struct psmouse *psmouse)
2085 {
2086         struct ps2dev *ps2dev = &psmouse->ps2dev;
2087         int reg_val;
2088         unsigned char param[4];
2089
2090         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
2091         if (reg_val == -EIO)
2092                 goto error;
2093
2094         if (reg_val == 0 &&
2095             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2096                 goto error;
2097
2098         if (alps_enter_command_mode(psmouse) ||
2099             alps_absolute_mode_v3(psmouse)) {
2100                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2101                 goto error;
2102         }
2103
2104         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2105         if (reg_val == -1)
2106                 goto error;
2107         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2108                 goto error;
2109
2110         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2111         if (reg_val == -1)
2112                 goto error;
2113         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2114                 goto error;
2115
2116         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2117                 goto error;
2118         if (__alps_command_mode_write_reg(psmouse, 0x04))
2119                 goto error;
2120
2121         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2122                 goto error;
2123         if (__alps_command_mode_write_reg(psmouse, 0x03))
2124                 goto error;
2125
2126         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2127                 goto error;
2128         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2129                 goto error;
2130
2131         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2132                 goto error;
2133         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2134                 goto error;
2135
2136         alps_exit_command_mode(psmouse);
2137
2138         /* Set rate and enable data reporting */
2139         param[0] = 0x64;
2140         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2141             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2142                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2143                 return -1;
2144         }
2145
2146         return 0;
2147
2148 error:
2149         /*
2150          * Leaving the touchpad in command mode will essentially render
2151          * it unusable until the machine reboots, so exit it here just
2152          * to be safe
2153          */
2154         alps_exit_command_mode(psmouse);
2155         return -1;
2156 }
2157
2158 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2159 {
2160         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2161         struct alps_data *priv = psmouse->private;
2162
2163         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2164         if (reg < 0)
2165                 return reg;
2166
2167         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2168         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2169
2170         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2171         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2172
2173         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2174         if (reg < 0)
2175                 return reg;
2176
2177         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2178         x_electrode = 17 + x_electrode;
2179
2180         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2181         y_electrode = 13 + y_electrode;
2182
2183         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2184         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2185
2186         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2187         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2188
2189         psmouse_dbg(psmouse,
2190                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2191                     x_pitch, y_pitch, x_electrode, y_electrode,
2192                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2193
2194         return 0;
2195 }
2196
2197 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2198 {
2199         struct alps_data *priv = psmouse->private;
2200         struct ps2dev *ps2dev = &psmouse->ps2dev;
2201         int reg_val, ret = -1;
2202
2203         if (priv->flags & ALPS_DUALPOINT) {
2204                 reg_val = alps_setup_trackstick_v3(psmouse,
2205                                                    ALPS_REG_BASE_RUSHMORE);
2206                 if (reg_val == -EIO)
2207                         goto error;
2208         }
2209
2210         if (alps_enter_command_mode(psmouse) ||
2211             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2212             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2213                 goto error;
2214
2215         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2216                 goto error;
2217
2218         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2219         if (reg_val == -1)
2220                 goto error;
2221         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2222                 goto error;
2223
2224         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2225                 goto error;
2226
2227         /* enter absolute mode */
2228         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2229         if (reg_val == -1)
2230                 goto error;
2231         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2232                 goto error;
2233
2234         alps_exit_command_mode(psmouse);
2235         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2236
2237 error:
2238         alps_exit_command_mode(psmouse);
2239         return ret;
2240 }
2241
2242 /* Must be in command mode when calling this function */
2243 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2244 {
2245         int reg_val;
2246
2247         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2248         if (reg_val == -1)
2249                 return -1;
2250
2251         reg_val |= 0x02;
2252         if (__alps_command_mode_write_reg(psmouse, reg_val))
2253                 return -1;
2254
2255         return 0;
2256 }
2257
2258 static int alps_hw_init_v4(struct psmouse *psmouse)
2259 {
2260         struct ps2dev *ps2dev = &psmouse->ps2dev;
2261         unsigned char param[4];
2262
2263         if (alps_enter_command_mode(psmouse))
2264                 goto error;
2265
2266         if (alps_absolute_mode_v4(psmouse)) {
2267                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2268                 goto error;
2269         }
2270
2271         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2272                 goto error;
2273
2274         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2275                 goto error;
2276
2277         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2278                 goto error;
2279
2280         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2281                 goto error;
2282
2283         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2284                 goto error;
2285
2286         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2287                 goto error;
2288
2289         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2290                 goto error;
2291
2292         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2293                 goto error;
2294
2295         alps_exit_command_mode(psmouse);
2296
2297         /*
2298          * This sequence changes the output from a 9-byte to an
2299          * 8-byte format. All the same data seems to be present,
2300          * just in a more compact format.
2301          */
2302         param[0] = 0xc8;
2303         param[1] = 0x64;
2304         param[2] = 0x50;
2305         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2306             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2307             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2308             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2309                 return -1;
2310
2311         /* Set rate and enable data reporting */
2312         param[0] = 0x64;
2313         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2314             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2315                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2316                 return -1;
2317         }
2318
2319         return 0;
2320
2321 error:
2322         /*
2323          * Leaving the touchpad in command mode will essentially render
2324          * it unusable until the machine reboots, so exit it here just
2325          * to be safe
2326          */
2327         alps_exit_command_mode(psmouse);
2328         return -1;
2329 }
2330
2331 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2332                                       unsigned char index, unsigned char otp[])
2333 {
2334         struct ps2dev *ps2dev = &psmouse->ps2dev;
2335
2336         switch (index) {
2337         case 0:
2338                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2339                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2340                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2341                         return -1;
2342
2343                 break;
2344
2345         case 1:
2346                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2347                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2348                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2349                         return -1;
2350
2351                 break;
2352         }
2353
2354         return 0;
2355 }
2356
2357 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2358                                           struct alps_data *priv)
2359 {
2360         int num_x_electrode;
2361         int num_y_electrode;
2362         int x_pitch, y_pitch, x_phys, y_phys;
2363
2364         num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2365         num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2366
2367         priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2368         priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2369
2370         x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2371         y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2372
2373         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2374         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2375
2376         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2377         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2378
2379         return 0;
2380 }
2381
2382 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2383                                        struct alps_data *priv)
2384 {
2385         unsigned char is_btnless;
2386
2387         is_btnless = (otp[1][1] >> 3) & 0x01;
2388
2389         if (is_btnless)
2390                 priv->flags |= ALPS_BUTTONPAD;
2391
2392         return 0;
2393 }
2394
2395 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2396                                     struct alps_data *priv)
2397 {
2398         unsigned char otp[2][4];
2399
2400         memset(otp, 0, sizeof(otp));
2401
2402         if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2403             alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2404                 return -1;
2405
2406         alps_update_device_area_ss4_v2(otp, priv);
2407
2408         alps_update_btn_info_ss4_v2(otp, priv);
2409
2410         return 0;
2411 }
2412
2413 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2414                                         struct alps_data *priv)
2415 {
2416         struct ps2dev *ps2dev = &psmouse->ps2dev;
2417         unsigned char param[4] = {0};
2418         int num_x_electrode, num_y_electrode;
2419
2420         if (alps_enter_command_mode(psmouse))
2421                 return -1;
2422
2423         param[0] = 0x0a;
2424         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2425             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2426             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2427             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2428             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2429                 return -1;
2430
2431         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2432                 return -1;
2433
2434         /*
2435          * Dolphin's sensor line number is not fixed. It can be calculated
2436          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2437          * Further more, we can get device's x_max and y_max by multiplying
2438          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2439          *
2440          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2441          *      real sensor line number X = 11 + 8 = 19, and
2442          *      real sensor line number Y = 8 + 1 = 9.
2443          *      So, x_max = (19 - 1) * 64 = 1152, and
2444          *          y_max = (9 - 1) * 64 = 512.
2445          */
2446         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2447         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2448         priv->x_bits = num_x_electrode;
2449         priv->y_bits = num_y_electrode;
2450         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2451         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2452
2453         if (alps_exit_command_mode(psmouse))
2454                 return -1;
2455
2456         return 0;
2457 }
2458
2459 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2460 {
2461         struct ps2dev *ps2dev = &psmouse->ps2dev;
2462         unsigned char param[2];
2463
2464         /* This is dolphin "v1" as empirically defined by florin9doi */
2465         param[0] = 0x64;
2466         param[1] = 0x28;
2467
2468         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2469             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2470             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2471                 return -1;
2472
2473         return 0;
2474 }
2475
2476 static int alps_hw_init_v7(struct psmouse *psmouse)
2477 {
2478         struct ps2dev *ps2dev = &psmouse->ps2dev;
2479         int reg_val, ret = -1;
2480
2481         if (alps_enter_command_mode(psmouse) ||
2482             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2483                 goto error;
2484
2485         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2486                 goto error;
2487
2488         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2489                 goto error;
2490
2491         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2492         if (reg_val == -1)
2493                 goto error;
2494         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2495                 goto error;
2496
2497         alps_exit_command_mode(psmouse);
2498         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2499
2500 error:
2501         alps_exit_command_mode(psmouse);
2502         return ret;
2503 }
2504
2505 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2506 {
2507         struct ps2dev *ps2dev = &psmouse->ps2dev;
2508         char param[2] = {0x64, 0x28};
2509         int ret = -1;
2510
2511         /* enter absolute mode */
2512         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2513             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2514             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2515             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2516                 goto error;
2517         }
2518
2519         /* T.B.D. Decread noise packet number, delete in the future */
2520         if (alps_exit_command_mode(psmouse) ||
2521             alps_enter_command_mode(psmouse) ||
2522             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2523                 goto error;
2524         }
2525         alps_exit_command_mode(psmouse);
2526
2527         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2528
2529 error:
2530         alps_exit_command_mode(psmouse);
2531         return ret;
2532 }
2533
2534 static int alps_set_protocol(struct psmouse *psmouse,
2535                              struct alps_data *priv,
2536                              const struct alps_protocol_info *protocol)
2537 {
2538         psmouse->private = priv;
2539
2540         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2541
2542         priv->proto_version = protocol->version;
2543         priv->byte0 = protocol->byte0;
2544         priv->mask0 = protocol->mask0;
2545         priv->flags = protocol->flags;
2546
2547         priv->x_max = 2000;
2548         priv->y_max = 1400;
2549         priv->x_bits = 15;
2550         priv->y_bits = 11;
2551
2552         switch (priv->proto_version) {
2553         case ALPS_PROTO_V1:
2554         case ALPS_PROTO_V2:
2555                 priv->hw_init = alps_hw_init_v1_v2;
2556                 priv->process_packet = alps_process_packet_v1_v2;
2557                 priv->set_abs_params = alps_set_abs_params_st;
2558                 priv->x_max = 1023;
2559                 priv->y_max = 767;
2560                 break;
2561
2562         case ALPS_PROTO_V3:
2563                 priv->hw_init = alps_hw_init_v3;
2564                 priv->process_packet = alps_process_packet_v3;
2565                 priv->set_abs_params = alps_set_abs_params_mt;
2566                 priv->decode_fields = alps_decode_pinnacle;
2567                 priv->nibble_commands = alps_v3_nibble_commands;
2568                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2569                 break;
2570
2571         case ALPS_PROTO_V3_RUSHMORE:
2572                 priv->hw_init = alps_hw_init_rushmore_v3;
2573                 priv->process_packet = alps_process_packet_v3;
2574                 priv->set_abs_params = alps_set_abs_params_mt;
2575                 priv->decode_fields = alps_decode_rushmore;
2576                 priv->nibble_commands = alps_v3_nibble_commands;
2577                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2578                 priv->x_bits = 16;
2579                 priv->y_bits = 12;
2580
2581                 if (alps_probe_trackstick_v3(psmouse,
2582                                              ALPS_REG_BASE_RUSHMORE) < 0)
2583                         priv->flags &= ~ALPS_DUALPOINT;
2584
2585                 break;
2586
2587         case ALPS_PROTO_V4:
2588                 priv->hw_init = alps_hw_init_v4;
2589                 priv->process_packet = alps_process_packet_v4;
2590                 priv->set_abs_params = alps_set_abs_params_mt;
2591                 priv->nibble_commands = alps_v4_nibble_commands;
2592                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2593                 break;
2594
2595         case ALPS_PROTO_V5:
2596                 priv->hw_init = alps_hw_init_dolphin_v1;
2597                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2598                 priv->decode_fields = alps_decode_dolphin;
2599                 priv->set_abs_params = alps_set_abs_params_mt;
2600                 priv->nibble_commands = alps_v3_nibble_commands;
2601                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2602                 priv->x_bits = 23;
2603                 priv->y_bits = 12;
2604
2605                 if (alps_dolphin_get_device_area(psmouse, priv))
2606                         return -EIO;
2607
2608                 break;
2609
2610         case ALPS_PROTO_V6:
2611                 priv->hw_init = alps_hw_init_v6;
2612                 priv->process_packet = alps_process_packet_v6;
2613                 priv->set_abs_params = alps_set_abs_params_st;
2614                 priv->nibble_commands = alps_v6_nibble_commands;
2615                 priv->x_max = 2047;
2616                 priv->y_max = 1535;
2617                 break;
2618
2619         case ALPS_PROTO_V7:
2620                 priv->hw_init = alps_hw_init_v7;
2621                 priv->process_packet = alps_process_packet_v7;
2622                 priv->decode_fields = alps_decode_packet_v7;
2623                 priv->set_abs_params = alps_set_abs_params_v7;
2624                 priv->nibble_commands = alps_v3_nibble_commands;
2625                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2626                 priv->x_max = 0xfff;
2627                 priv->y_max = 0x7ff;
2628
2629                 if (priv->fw_ver[1] != 0xba)
2630                         priv->flags |= ALPS_BUTTONPAD;
2631
2632                 break;
2633
2634         case ALPS_PROTO_V8:
2635                 priv->hw_init = alps_hw_init_ss4_v2;
2636                 priv->process_packet = alps_process_packet_ss4_v2;
2637                 priv->decode_fields = alps_decode_ss4_v2;
2638                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2639                 priv->nibble_commands = alps_v3_nibble_commands;
2640                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2641
2642                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2643                         return -EIO;
2644
2645                 break;
2646         }
2647
2648         return 0;
2649 }
2650
2651 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2652                                                          unsigned char *ec)
2653 {
2654         const struct alps_model_info *model;
2655         int i;
2656
2657         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2658                 model = &alps_model_data[i];
2659
2660                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2661                     (!model->command_mode_resp ||
2662                      model->command_mode_resp == ec[2])) {
2663
2664                         return &model->protocol_info;
2665                 }
2666         }
2667
2668         return NULL;
2669 }
2670
2671 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2672 {
2673         const struct alps_protocol_info *protocol;
2674         unsigned char e6[4], e7[4], ec[4];
2675         int error;
2676
2677         /*
2678          * First try "E6 report".
2679          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2680          * The bits 0-2 of the first byte will be 1s if some buttons are
2681          * pressed.
2682          */
2683         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2684                          PSMOUSE_CMD_SETSCALE11, e6))
2685                 return -EIO;
2686
2687         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2688                 return -EINVAL;
2689
2690         /*
2691          * Now get the "E7" and "EC" reports.  These will uniquely identify
2692          * most ALPS touchpads.
2693          */
2694         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2695                          PSMOUSE_CMD_SETSCALE21, e7) ||
2696             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2697                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2698             alps_exit_command_mode(psmouse))
2699                 return -EIO;
2700
2701         protocol = alps_match_table(e7, ec);
2702         if (!protocol) {
2703                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2704                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2705                         protocol = &alps_v5_protocol_data;
2706                 } else if (ec[0] == 0x88 &&
2707                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2708                         protocol = &alps_v7_protocol_data;
2709                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2710                         protocol = &alps_v3_rushmore_data;
2711                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2712                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2713                         protocol = &alps_v3_protocol_data;
2714                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2715                            e7[2] == 0x14 && ec[1] == 0x02) {
2716                         protocol = &alps_v8_protocol_data;
2717                 } else {
2718                         psmouse_dbg(psmouse,
2719                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2720                         return -EINVAL;
2721                 }
2722         }
2723
2724         if (priv) {
2725                 /* Save the Firmware version */
2726                 memcpy(priv->fw_ver, ec, 3);
2727                 error = alps_set_protocol(psmouse, priv, protocol);
2728                 if (error)
2729                         return error;
2730         }
2731
2732         return 0;
2733 }
2734
2735 static int alps_reconnect(struct psmouse *psmouse)
2736 {
2737         struct alps_data *priv = psmouse->private;
2738
2739         psmouse_reset(psmouse);
2740
2741         if (alps_identify(psmouse, priv) < 0)
2742                 return -1;
2743
2744         return priv->hw_init(psmouse);
2745 }
2746
2747 static void alps_disconnect(struct psmouse *psmouse)
2748 {
2749         struct alps_data *priv = psmouse->private;
2750
2751         psmouse_reset(psmouse);
2752         del_timer_sync(&priv->timer);
2753         if (priv->dev2)
2754                 input_unregister_device(priv->dev2);
2755         if (!IS_ERR_OR_NULL(priv->dev3))
2756                 input_unregister_device(priv->dev3);
2757         kfree(priv);
2758 }
2759
2760 static void alps_set_abs_params_st(struct alps_data *priv,
2761                                    struct input_dev *dev1)
2762 {
2763         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2764         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2765         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2766 }
2767
2768 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2769                                           struct input_dev *dev1)
2770 {
2771         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2772         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2773
2774         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2775         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2776
2777         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2778         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2779 }
2780
2781 static void alps_set_abs_params_mt(struct alps_data *priv,
2782                                    struct input_dev *dev1)
2783 {
2784         alps_set_abs_params_mt_common(priv, dev1);
2785         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2786
2787         input_mt_init_slots(dev1, MAX_TOUCHES,
2788                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2789                                 INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2790 }
2791
2792 static void alps_set_abs_params_v7(struct alps_data *priv,
2793                                    struct input_dev *dev1)
2794 {
2795         alps_set_abs_params_mt_common(priv, dev1);
2796         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2797
2798         input_mt_init_slots(dev1, MAX_TOUCHES,
2799                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2800                                 INPUT_MT_TRACK);
2801
2802         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2803 }
2804
2805 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2806                                        struct input_dev *dev1)
2807 {
2808         alps_set_abs_params_mt_common(priv, dev1);
2809         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2810         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2811
2812         input_mt_init_slots(dev1, MAX_TOUCHES,
2813                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2814                                 INPUT_MT_TRACK);
2815 }
2816
2817 int alps_init(struct psmouse *psmouse)
2818 {
2819         struct alps_data *priv = psmouse->private;
2820         struct input_dev *dev1 = psmouse->dev;
2821         int error;
2822
2823         error = priv->hw_init(psmouse);
2824         if (error)
2825                 goto init_fail;
2826
2827         /*
2828          * Undo part of setup done for us by psmouse core since touchpad
2829          * is not a relative device.
2830          */
2831         __clear_bit(EV_REL, dev1->evbit);
2832         __clear_bit(REL_X, dev1->relbit);
2833         __clear_bit(REL_Y, dev1->relbit);
2834
2835         /*
2836          * Now set up our capabilities.
2837          */
2838         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2839         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2840         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2841         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2842                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2843
2844         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2845
2846         priv->set_abs_params(priv, dev1);
2847
2848         if (priv->flags & ALPS_WHEEL) {
2849                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2850                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2851         }
2852
2853         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2854                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2855                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2856         }
2857
2858         if (priv->flags & ALPS_FOUR_BUTTONS) {
2859                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2860                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2861                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2862                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2863         } else if (priv->flags & ALPS_BUTTONPAD) {
2864                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2865                 clear_bit(BTN_RIGHT, dev1->keybit);
2866         } else {
2867                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2868         }
2869
2870         if (priv->flags & ALPS_DUALPOINT) {
2871                 struct input_dev *dev2;
2872
2873                 dev2 = input_allocate_device();
2874                 if (!dev2) {
2875                         psmouse_err(psmouse,
2876                                     "failed to allocate trackstick device\n");
2877                         error = -ENOMEM;
2878                         goto init_fail;
2879                 }
2880
2881                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2882                          psmouse->ps2dev.serio->phys);
2883                 dev2->phys = priv->phys2;
2884
2885                 /*
2886                  * format of input device name is: "protocol vendor name"
2887                  * see function psmouse_switch_protocol() in psmouse-base.c
2888                  */
2889                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2890
2891                 dev2->id.bustype = BUS_I8042;
2892                 dev2->id.vendor  = 0x0002;
2893                 dev2->id.product = PSMOUSE_ALPS;
2894                 dev2->id.version = priv->proto_version;
2895                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2896
2897                 input_set_capability(dev2, EV_REL, REL_X);
2898                 input_set_capability(dev2, EV_REL, REL_Y);
2899                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2900                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2901                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2902
2903                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2904                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2905
2906                 error = input_register_device(dev2);
2907                 if (error) {
2908                         psmouse_err(psmouse,
2909                                     "failed to register trackstick device: %d\n",
2910                                     error);
2911                         input_free_device(dev2);
2912                         goto init_fail;
2913                 }
2914
2915                 priv->dev2 = dev2;
2916         }
2917
2918         priv->psmouse = psmouse;
2919
2920         INIT_DELAYED_WORK(&priv->dev3_register_work,
2921                           alps_register_bare_ps2_mouse);
2922
2923         psmouse->protocol_handler = alps_process_byte;
2924         psmouse->poll = alps_poll;
2925         psmouse->disconnect = alps_disconnect;
2926         psmouse->reconnect = alps_reconnect;
2927         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2928
2929         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2930         psmouse->resync_time = 0;
2931
2932         /* Allow 2 invalid packets without resetting device */
2933         psmouse->resetafter = psmouse->pktsize * 2;
2934
2935         return 0;
2936
2937 init_fail:
2938         psmouse_reset(psmouse);
2939         /*
2940          * Even though we did not allocate psmouse->private we do free
2941          * it here.
2942          */
2943         kfree(psmouse->private);
2944         psmouse->private = NULL;
2945         return error;
2946 }
2947
2948 int alps_detect(struct psmouse *psmouse, bool set_properties)
2949 {
2950         struct alps_data *priv;
2951         int error;
2952
2953         error = alps_identify(psmouse, NULL);
2954         if (error)
2955                 return error;
2956
2957         /*
2958          * Reset the device to make sure it is fully operational:
2959          * on some laptops, like certain Dell Latitudes, we may
2960          * fail to properly detect presence of trackstick if device
2961          * has not been reset.
2962          */
2963         psmouse_reset(psmouse);
2964
2965         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2966         if (!priv)
2967                 return -ENOMEM;
2968
2969         error = alps_identify(psmouse, priv);
2970         if (error) {
2971                 kfree(priv);
2972                 return error;
2973         }
2974
2975         if (set_properties) {
2976                 psmouse->vendor = "ALPS";
2977                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
2978                                 "DualPoint TouchPad" : "GlidePoint";
2979                 psmouse->model = priv->proto_version;
2980         } else {
2981                 /*
2982                  * Destroy alps_data structure we allocated earlier since
2983                  * this was just a "trial run". Otherwise we'll keep it
2984                  * to be used by alps_init() which has to be called if
2985                  * we succeed and set_properties is true.
2986                  */
2987                 kfree(priv);
2988                 psmouse->private = NULL;
2989         }
2990
2991         return 0;
2992 }
2993