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