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_IS_RUSHMORE        0x100   /* device is a rushmore */
 103 #define ALPS_BUTTONPAD          0x200   /* device is a clickpad */
 104
 105 static const struct alps_model_info alps_model_data[] = {
 106         { { 0x32, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },  /* Toshiba Salellite Pro M10 */
 107         { { 0x33, 0x02, 0x0a }, 0x00, ALPS_PROTO_V1, 0x88, 0xf8, 0 },                           /* UMAX-530T */
 108         { { 0x53, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 109         { { 0x53, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 110         { { 0x60, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },                           /* HP ze1115 */
 111         { { 0x63, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 112         { { 0x63, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 113         { { 0x63, 0x02, 0x28 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 },                /* Fujitsu Siemens S6010 */
 114         { { 0x63, 0x02, 0x3c }, 0x00, ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL },                  /* Toshiba Satellite S2400-103 */
 115         { { 0x63, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 },                /* NEC Versa L320 */
 116         { { 0x63, 0x02, 0x64 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 117         { { 0x63, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },  /* Dell Latitude D800 */
 118         { { 0x73, 0x00, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT },              /* ThinkPad R61 8918-5QG */
 119         { { 0x73, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 120         { { 0x73, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 },                /* Ahtec Laptop */
 121         { { 0x20, 0x02, 0x0e }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },  /* XXX */
 122         { { 0x22, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
 123         { { 0x22, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT },  /* Dell Latitude D600 */
 124         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
 125         { { 0x62, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf,
 126                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
 127         { { 0x73, 0x00, 0x14 }, 0x00, ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT },              /* Dell XT2 */
 128         { { 0x73, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS },           /* Dell Vostro 1400 */
 129         { { 0x52, 0x01, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff,
 130                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },                            /* Toshiba Tecra A11-11L */
 131         { { 0x73, 0x02, 0x64 }, 0x8a, ALPS_PROTO_V4, 0x8f, 0x8f, 0 },
 132 };
 133
 134 static void alps_set_abs_params_st(struct alps_data *priv,
 135                                    struct input_dev *dev1);
 136 static void alps_set_abs_params_mt(struct alps_data *priv,
 137                                    struct input_dev *dev1);
 138
 139 /*
 140  * XXX - this entry is suspicious. First byte has zero lower nibble,
 141  * which is what a normal mouse would report. Also, the value 0x0e
 142  * isn't valid per PS/2 spec.
 143  */
 144
 145 /* Packet formats are described in Documentation/input/alps.txt */
 146
 147 static bool alps_is_valid_first_byte(struct alps_data *priv,
 148                                      unsigned char data)
 149 {
 150         return (data & priv->mask0) == priv->byte0;
 151 }
 152
 153 static void alps_report_buttons(struct psmouse *psmouse,
 154                                 struct input_dev *dev1, struct input_dev *dev2,
 155                                 int left, int right, int middle)
 156 {
 157         struct input_dev *dev;
 158
 159         /*
 160          * If shared button has already been reported on the
 161          * other device (dev2) then this event should be also
 162          * sent through that device.
 163          */
 164         dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
 165         input_report_key(dev, BTN_LEFT, left);
 166
 167         dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
 168         input_report_key(dev, BTN_RIGHT, right);
 169
 170         dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
 171         input_report_key(dev, BTN_MIDDLE, middle);
 172
 173         /*
 174          * Sync the _other_ device now, we'll do the first
 175          * device later once we report the rest of the events.
 176          */
 177         input_sync(dev2);
 178 }
 179
 180 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
 181 {
 182         struct alps_data *priv = psmouse->private;
 183         unsigned char *packet = psmouse->packet;
 184         struct input_dev *dev = psmouse->dev;
 185         struct input_dev *dev2 = priv->dev2;
 186         int x, y, z, ges, fin, left, right, middle;
 187         int back = 0, forward = 0;
 188
 189         if (priv->proto_version == ALPS_PROTO_V1) {
 190                 left = packet[2] & 0x10;
 191                 right = packet[2] & 0x08;
 192                 middle = 0;
 193                 x = packet[1] | ((packet[0] & 0x07) << 7);
 194                 y = packet[4] | ((packet[3] & 0x07) << 7);
 195                 z = packet[5];
 196         } else {
 197                 left = packet[3] & 1;
 198                 right = packet[3] & 2;
 199                 middle = packet[3] & 4;
 200                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 201                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 202                 z = packet[5];
 203         }
 204
 205         if (priv->flags & ALPS_FW_BK_1) {
 206                 back = packet[0] & 0x10;
 207                 forward = packet[2] & 4;
 208         }
 209
 210         if (priv->flags & ALPS_FW_BK_2) {
 211                 back = packet[3] & 4;
 212                 forward = packet[2] & 4;
 213                 if ((middle = forward && back))
 214                         forward = back = 0;
 215         }
 216
 217         ges = packet[2] & 1;
 218         fin = packet[2] & 2;
 219
 220         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
 221                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 222                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 223
 224                 alps_report_buttons(psmouse, dev2, dev, left, right, middle);
 225
 226                 input_sync(dev2);
 227                 return;
 228         }
 229
 230         alps_report_buttons(psmouse, dev, dev2, left, right, middle);
 231
 232         /* Convert hardware tap to a reasonable Z value */
 233         if (ges && !fin)
 234                 z = 40;
 235
 236         /*
 237          * A "tap and drag" operation is reported by the hardware as a transition
 238          * from (!fin && ges) to (fin && ges). This should be translated to the
 239          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 240          */
 241         if (ges && fin && !priv->prev_fin) {
 242                 input_report_abs(dev, ABS_X, x);
 243                 input_report_abs(dev, ABS_Y, y);
 244                 input_report_abs(dev, ABS_PRESSURE, 0);
 245                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 246                 input_sync(dev);
 247         }
 248         priv->prev_fin = fin;
 249
 250         if (z > 30)
 251                 input_report_key(dev, BTN_TOUCH, 1);
 252         if (z < 25)
 253                 input_report_key(dev, BTN_TOUCH, 0);
 254
 255         if (z > 0) {
 256                 input_report_abs(dev, ABS_X, x);
 257                 input_report_abs(dev, ABS_Y, y);
 258         }
 259
 260         input_report_abs(dev, ABS_PRESSURE, z);
 261         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 262
 263         if (priv->flags & ALPS_WHEEL)
 264                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 265
 266         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 267                 input_report_key(dev, BTN_FORWARD, forward);
 268                 input_report_key(dev, BTN_BACK, back);
 269         }
 270
 271         if (priv->flags & ALPS_FOUR_BUTTONS) {
 272                 input_report_key(dev, BTN_0, packet[2] & 4);
 273                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 274                 input_report_key(dev, BTN_2, packet[3] & 4);
 275                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 276         }
 277
 278         input_sync(dev);
 279 }
 280
 281 /*
 282  * Process bitmap data for V5 protocols. Return value is null.
 283  *
 284  * The bitmaps don't have enough data to track fingers, so this function
 285  * only generates points representing a bounding box of at most two contacts.
 286  * These two points are returned in fields->mt.
 287  */
 288 static void alps_process_bitmap_dolphin(struct alps_data *priv,
 289                                         struct alps_fields *fields)
 290 {
 291         int box_middle_x, box_middle_y;
 292         unsigned int x_map, y_map;
 293         unsigned char start_bit, end_bit;
 294         unsigned char x_msb, x_lsb, y_msb, y_lsb;
 295
 296         x_map = fields->x_map;
 297         y_map = fields->y_map;
 298
 299         if (!x_map || !y_map)
 300                 return;
 301
 302         /* Get Most-significant and Least-significant bit */
 303         x_msb = fls(x_map);
 304         x_lsb = ffs(x_map);
 305         y_msb = fls(y_map);
 306         y_lsb = ffs(y_map);
 307
 308         /* Most-significant bit should never exceed max sensor line number */
 309         if (x_msb > priv->x_bits || y_msb > priv->y_bits)
 310                 return;
 311
 312         if (fields->fingers > 1) {
 313                 start_bit = priv->x_bits - x_msb;
 314                 end_bit = priv->x_bits - x_lsb;
 315                 box_middle_x = (priv->x_max * (start_bit + end_bit)) /
 316                                 (2 * (priv->x_bits - 1));
 317
 318                 start_bit = y_lsb - 1;
 319                 end_bit = y_msb - 1;
 320                 box_middle_y = (priv->y_max * (start_bit + end_bit)) /
 321                                 (2 * (priv->y_bits - 1));
 322                 fields->mt[0] = fields->st;
 323                 fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
 324                 fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
 325         }
 326 }
 327
 328 static void alps_get_bitmap_points(unsigned int map,
 329                                    struct alps_bitmap_point *low,
 330                                    struct alps_bitmap_point *high,
 331                                    int *fingers)
 332 {
 333         struct alps_bitmap_point *point;
 334         int i, bit, prev_bit = 0;
 335
 336         point = low;
 337         for (i = 0; map != 0; i++, map >>= 1) {
 338                 bit = map & 1;
 339                 if (bit) {
 340                         if (!prev_bit) {
 341                                 point->start_bit = i;
 342                                 point->num_bits = 0;
 343                                 (*fingers)++;
 344                         }
 345                         point->num_bits++;
 346                 } else {
 347                         if (prev_bit)
 348                                 point = high;
 349                 }
 350                 prev_bit = bit;
 351         }
 352 }
 353
 354 /*
 355  * Process bitmap data from v3 and v4 protocols. Returns the number of
 356  * fingers detected. A return value of 0 means at least one of the
 357  * bitmaps was empty.
 358  *
 359  * The bitmaps don't have enough data to track fingers, so this function
 360  * only generates points representing a bounding box of all contacts.
 361  * These points are returned in fields->mt when the return value
 362  * is greater than 0.
 363  */
 364 static int alps_process_bitmap(struct alps_data *priv,
 365                                struct alps_fields *fields)
 366 {
 367         int i, fingers_x = 0, fingers_y = 0, fingers;
 368         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 369         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 370
 371         if (!fields->x_map || !fields->y_map)
 372                 return 0;
 373
 374         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
 375         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
 376
 377         /*
 378          * Fingers can overlap, so we use the maximum count of fingers
 379          * on either axis as the finger count.
 380          */
 381         fingers = max(fingers_x, fingers_y);
 382
 383         /*
 384          * If an axis reports only a single contact, we have overlapping or
 385          * adjacent fingers. Divide the single contact between the two points.
 386          */
 387         if (fingers_x == 1) {
 388                 i = (x_low.num_bits - 1) / 2;
 389                 x_low.num_bits = x_low.num_bits - i;
 390                 x_high.start_bit = x_low.start_bit + i;
 391                 x_high.num_bits = max(i, 1);
 392         }
 393         if (fingers_y == 1) {
 394                 i = (y_low.num_bits - 1) / 2;
 395                 y_low.num_bits = y_low.num_bits - i;
 396                 y_high.start_bit = y_low.start_bit + i;
 397                 y_high.num_bits = max(i, 1);
 398         }
 399
 400         fields->mt[0].x =
 401                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 402                 (2 * (priv->x_bits - 1));
 403         fields->mt[0].y =
 404                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 405                 (2 * (priv->y_bits - 1));
 406
 407         fields->mt[1].x =
 408                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 409                 (2 * (priv->x_bits - 1));
 410         fields->mt[1].y =
 411                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 412                 (2 * (priv->y_bits - 1));
 413
 414         /* y-bitmap order is reversed, except on rushmore */
 415         if (!(priv->flags & ALPS_IS_RUSHMORE)) {
 416                 fields->mt[0].y = priv->y_max - fields->mt[0].y;
 417                 fields->mt[1].y = priv->y_max - fields->mt[1].y;
 418         }
 419
 420         return fingers;
 421 }
 422
 423 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
 424 {
 425         input_mt_slot(dev, slot);
 426         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 427         input_report_abs(dev, ABS_MT_POSITION_X, x);
 428         input_report_abs(dev, ABS_MT_POSITION_Y, y);
 429 }
 430
 431 static void alps_report_mt_data(struct psmouse *psmouse, int n)
 432 {
 433         struct alps_data *priv = psmouse->private;
 434         struct input_dev *dev = psmouse->dev;
 435         struct alps_fields *f = &priv->f;
 436         int i, slot[MAX_TOUCHES];
 437
 438         input_mt_assign_slots(dev, slot, f->mt, n);
 439         for (i = 0; i < n; i++)
 440                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
 441
 442         input_mt_sync_frame(dev);
 443 }
 444
 445 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
 446 {
 447         struct alps_data *priv = psmouse->private;
 448         struct input_dev *dev = psmouse->dev;
 449         struct alps_fields *f = &priv->f;
 450
 451         /* Use st data when we don't have mt data */
 452         if (fingers < 2) {
 453                 f->mt[0].x = f->st.x;
 454                 f->mt[0].y = f->st.y;
 455                 fingers = f->pressure > 0 ? 1 : 0;
 456         }
 457
 458         alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
 459
 460         input_mt_report_finger_count(dev, fingers);
 461
 462         input_report_key(dev, BTN_LEFT, f->left);
 463         input_report_key(dev, BTN_RIGHT, f->right);
 464         input_report_key(dev, BTN_MIDDLE, f->middle);
 465
 466         input_report_abs(dev, ABS_PRESSURE, f->pressure);
 467
 468         input_sync(dev);
 469 }
 470
 471 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 472 {
 473         struct alps_data *priv = psmouse->private;
 474         unsigned char *packet = psmouse->packet;
 475         struct input_dev *dev = priv->dev2;
 476         int x, y, z, left, right, middle;
 477
 478         /* Sanity check packet */
 479         if (!(packet[0] & 0x40)) {
 480                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 481                 return;
 482         }
 483
 484         /*
 485          * There's a special packet that seems to indicate the end
 486          * of a stream of trackstick data. Filter these out.
 487          */
 488         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 489                 return;
 490
 491         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 492         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 493         z = (packet[4] & 0x7c) >> 2;
 494
 495         /*
 496          * The x and y values tend to be quite large, and when used
 497          * alone the trackstick is difficult to use. Scale them down
 498          * to compensate.
 499          */
 500         x /= 8;
 501         y /= 8;
 502
 503         input_report_rel(dev, REL_X, x);
 504         input_report_rel(dev, REL_Y, -y);
 505
 506         /*
 507          * Most ALPS models report the trackstick buttons in the touchpad
 508          * packets, but a few report them here. No reliable way has been
 509          * found to differentiate between the models upfront, so we enable
 510          * the quirk in response to seeing a button press in the trackstick
 511          * packet.
 512          */
 513         left = packet[3] & 0x01;
 514         right = packet[3] & 0x02;
 515         middle = packet[3] & 0x04;
 516
 517         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 518             (left || right || middle))
 519                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 520
 521         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 522                 input_report_key(dev, BTN_LEFT, left);
 523                 input_report_key(dev, BTN_RIGHT, right);
 524                 input_report_key(dev, BTN_MIDDLE, middle);
 525         }
 526
 527         input_sync(dev);
 528         return;
 529 }
 530
 531 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 532 {
 533         f->left = !!(p[3] & 0x01);
 534         f->right = !!(p[3] & 0x02);
 535         f->middle = !!(p[3] & 0x04);
 536
 537         f->ts_left = !!(p[3] & 0x10);
 538         f->ts_right = !!(p[3] & 0x20);
 539         f->ts_middle = !!(p[3] & 0x40);
 540 }
 541
 542 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 543                                  struct psmouse *psmouse)
 544 {
 545         f->first_mp = !!(p[4] & 0x40);
 546         f->is_mp = !!(p[0] & 0x40);
 547
 548         f->fingers = (p[5] & 0x3) + 1;
 549         f->x_map = ((p[4] & 0x7e) << 8) |
 550                    ((p[1] & 0x7f) << 2) |
 551                    ((p[0] & 0x30) >> 4);
 552         f->y_map = ((p[3] & 0x70) << 4) |
 553                    ((p[2] & 0x7f) << 1) |
 554                    (p[4] & 0x01);
 555
 556         f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 557                ((p[0] & 0x30) >> 4);
 558         f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 559         f->pressure = p[5] & 0x7f;
 560
 561         alps_decode_buttons_v3(f, p);
 562
 563         return 0;
 564 }
 565
 566 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 567                                  struct psmouse *psmouse)
 568 {
 569         alps_decode_pinnacle(f, p, psmouse);
 570
 571         /* Rushmore's packet decode has a bit difference with Pinnacle's */
 572         f->is_mp = !!(p[5] & 0x40);
 573         f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
 574         f->x_map |= (p[5] & 0x10) << 11;
 575         f->y_map |= (p[5] & 0x20) << 6;
 576
 577         return 0;
 578 }
 579
 580 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 581                                 struct psmouse *psmouse)
 582 {
 583         u64 palm_data = 0;
 584         struct alps_data *priv = psmouse->private;
 585
 586         f->first_mp = !!(p[0] & 0x02);
 587         f->is_mp = !!(p[0] & 0x20);
 588
 589         if (!f->is_mp) {
 590                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 591                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 592                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
 593                 alps_decode_buttons_v3(f, p);
 594         } else {
 595                 f->fingers = ((p[0] & 0x6) >> 1 |
 596                      (p[0] & 0x10) >> 2);
 597
 598                 palm_data = (p[1] & 0x7f) |
 599                             ((p[2] & 0x7f) << 7) |
 600                             ((p[4] & 0x7f) << 14) |
 601                             ((p[5] & 0x7f) << 21) |
 602                             ((p[3] & 0x07) << 28) |
 603                             (((u64)p[3] & 0x70) << 27) |
 604                             (((u64)p[0] & 0x01) << 34);
 605
 606                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
 607                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
 608
 609                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
 610                 f->x_map = (palm_data >> priv->y_bits) &
 611                            (BIT(priv->x_bits) - 1);
 612         }
 613
 614         return 0;
 615 }
 616
 617 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 618 {
 619         struct alps_data *priv = psmouse->private;
 620         unsigned char *packet = psmouse->packet;
 621         struct input_dev *dev2 = priv->dev2;
 622         struct alps_fields *f = &priv->f;
 623         int fingers = 0;
 624
 625         memset(f, 0, sizeof(*f));
 626
 627         priv->decode_fields(f, packet, psmouse);
 628
 629         /*
 630          * There's no single feature of touchpad position and bitmap packets
 631          * that can be used to distinguish between them. We rely on the fact
 632          * that a bitmap packet should always follow a position packet with
 633          * bit 6 of packet[4] set.
 634          */
 635         if (priv->multi_packet) {
 636                 /*
 637                  * Sometimes a position packet will indicate a multi-packet
 638                  * sequence, but then what follows is another position
 639                  * packet. Check for this, and when it happens process the
 640                  * position packet as usual.
 641                  */
 642                 if (f->is_mp) {
 643                         fingers = f->fingers;
 644                         if (priv->proto_version == ALPS_PROTO_V3) {
 645                                 if (alps_process_bitmap(priv, f) == 0)
 646                                         fingers = 0; /* Use st data */
 647
 648                                 /* Now process position packet */
 649                                 priv->decode_fields(f, priv->multi_data,
 650                                                     psmouse);
 651                         } else {
 652                                 /*
 653                                  * Because Dolphin uses position packet's
 654                                  * coordinate data as Pt1 and uses it to
 655                                  * calculate Pt2, so we need to do position
 656                                  * packet decode first.
 657                                  */
 658                                 priv->decode_fields(f, priv->multi_data,
 659                                                     psmouse);
 660
 661                                 /*
 662                                  * Since Dolphin's finger number is reliable,
 663                                  * there is no need to compare with bmap_fn.
 664                                  */
 665                                 alps_process_bitmap_dolphin(priv, f);
 666                         }
 667                 } else {
 668                         priv->multi_packet = 0;
 669                 }
 670         }
 671
 672         /*
 673          * Bit 6 of byte 0 is not usually set in position packets. The only
 674          * times it seems to be set is in situations where the data is
 675          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 676          * this combined with the fact that this bit is useful for filtering
 677          * out misidentified bitmap packets, we reject anything with this
 678          * bit set.
 679          */
 680         if (f->is_mp)
 681                 return;
 682
 683         if (!priv->multi_packet && f->first_mp) {
 684                 priv->multi_packet = 1;
 685                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 686                 return;
 687         }
 688
 689         priv->multi_packet = 0;
 690
 691         /*
 692          * Sometimes the hardware sends a single packet with z = 0
 693          * in the middle of a stream. Real releases generate packets
 694          * with x, y, and z all zero, so these seem to be flukes.
 695          * Ignore them.
 696          */
 697         if (f->st.x && f->st.y && !f->pressure)
 698                 return;
 699
 700         alps_report_semi_mt_data(psmouse, fingers);
 701
 702         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 703                 input_report_key(dev2, BTN_LEFT, f->ts_left);
 704                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
 705                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
 706                 input_sync(dev2);
 707         }
 708 }
 709
 710 static void alps_process_packet_v3(struct psmouse *psmouse)
 711 {
 712         unsigned char *packet = psmouse->packet;
 713
 714         /*
 715          * v3 protocol packets come in three types, two representing
 716          * touchpad data and one representing trackstick data.
 717          * Trackstick packets seem to be distinguished by always
 718          * having 0x3f in the last byte. This value has never been
 719          * observed in the last byte of either of the other types
 720          * of packets.
 721          */
 722         if (packet[5] == 0x3f) {
 723                 alps_process_trackstick_packet_v3(psmouse);
 724                 return;
 725         }
 726
 727         alps_process_touchpad_packet_v3_v5(psmouse);
 728 }
 729
 730 static void alps_process_packet_v6(struct psmouse *psmouse)
 731 {
 732         struct alps_data *priv = psmouse->private;
 733         unsigned char *packet = psmouse->packet;
 734         struct input_dev *dev = psmouse->dev;
 735         struct input_dev *dev2 = priv->dev2;
 736         int x, y, z, left, right, middle;
 737
 738         /*
 739          * We can use Byte5 to distinguish if the packet is from Touchpad
 740          * or Trackpoint.
 741          * Touchpad:    0 - 0x7E
 742          * Trackpoint:  0x7F
 743          */
 744         if (packet[5] == 0x7F) {
 745                 /* It should be a DualPoint when received Trackpoint packet */
 746                 if (!(priv->flags & ALPS_DUALPOINT))
 747                         return;
 748
 749                 /* Trackpoint packet */
 750                 x = packet[1] | ((packet[3] & 0x20) << 2);
 751                 y = packet[2] | ((packet[3] & 0x40) << 1);
 752                 z = packet[4];
 753                 left = packet[3] & 0x01;
 754                 right = packet[3] & 0x02;
 755                 middle = packet[3] & 0x04;
 756
 757                 /* To prevent the cursor jump when finger lifted */
 758                 if (x == 0x7F && y == 0x7F && z == 0x7F)
 759                         x = y = z = 0;
 760
 761                 /* Divide 4 since trackpoint's speed is too fast */
 762                 input_report_rel(dev2, REL_X, (char)x / 4);
 763                 input_report_rel(dev2, REL_Y, -((char)y / 4));
 764
 765                 input_report_key(dev2, BTN_LEFT, left);
 766                 input_report_key(dev2, BTN_RIGHT, right);
 767                 input_report_key(dev2, BTN_MIDDLE, middle);
 768
 769                 input_sync(dev2);
 770                 return;
 771         }
 772
 773         /* Touchpad packet */
 774         x = packet[1] | ((packet[3] & 0x78) << 4);
 775         y = packet[2] | ((packet[4] & 0x78) << 4);
 776         z = packet[5];
 777         left = packet[3] & 0x01;
 778         right = packet[3] & 0x02;
 779
 780         if (z > 30)
 781                 input_report_key(dev, BTN_TOUCH, 1);
 782         if (z < 25)
 783                 input_report_key(dev, BTN_TOUCH, 0);
 784
 785         if (z > 0) {
 786                 input_report_abs(dev, ABS_X, x);
 787                 input_report_abs(dev, ABS_Y, y);
 788         }
 789
 790         input_report_abs(dev, ABS_PRESSURE, z);
 791         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 792
 793         /* v6 touchpad does not have middle button */
 794         input_report_key(dev, BTN_LEFT, left);
 795         input_report_key(dev, BTN_RIGHT, right);
 796
 797         input_sync(dev);
 798 }
 799
 800 static void alps_process_packet_v4(struct psmouse *psmouse)
 801 {
 802         struct alps_data *priv = psmouse->private;
 803         unsigned char *packet = psmouse->packet;
 804         struct alps_fields *f = &priv->f;
 805         int offset;
 806
 807         /*
 808          * v4 has a 6-byte encoding for bitmap data, but this data is
 809          * broken up between 3 normal packets. Use priv->multi_packet to
 810          * track our position in the bitmap packet.
 811          */
 812         if (packet[6] & 0x40) {
 813                 /* sync, reset position */
 814                 priv->multi_packet = 0;
 815         }
 816
 817         if (WARN_ON_ONCE(priv->multi_packet > 2))
 818                 return;
 819
 820         offset = 2 * priv->multi_packet;
 821         priv->multi_data[offset] = packet[6];
 822         priv->multi_data[offset + 1] = packet[7];
 823
 824         if (++priv->multi_packet > 2) {
 825                 priv->multi_packet = 0;
 826
 827                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
 828                            ((priv->multi_data[3] & 0x60) << 3) |
 829                            ((priv->multi_data[0] & 0x3f) << 2) |
 830                            ((priv->multi_data[1] & 0x60) >> 5);
 831                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
 832                            ((priv->multi_data[3] & 0x1f) << 5) |
 833                             (priv->multi_data[1] & 0x1f);
 834
 835                 f->fingers = alps_process_bitmap(priv, f);
 836         }
 837
 838         f->left = !!(packet[4] & 0x01);
 839         f->right = !!(packet[4] & 0x02);
 840
 841         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 842                   ((packet[0] & 0x30) >> 4);
 843         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 844         f->pressure = packet[5] & 0x7f;
 845
 846         alps_report_semi_mt_data(psmouse, f->fingers);
 847 }
 848
 849 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
 850 {
 851         switch (psmouse->pktcnt) {
 852         case 3:
 853                 return (psmouse->packet[2] & 0x40) == 0x40;
 854         case 4:
 855                 return (psmouse->packet[3] & 0x48) == 0x48;
 856         case 6:
 857                 return (psmouse->packet[5] & 0x40) == 0x00;
 858         }
 859         return true;
 860 }
 861
 862 static unsigned char alps_get_packet_id_v7(char *byte)
 863 {
 864         unsigned char packet_id;
 865
 866         if (byte[4] & 0x40)
 867                 packet_id = V7_PACKET_ID_TWO;
 868         else if (byte[4] & 0x01)
 869                 packet_id = V7_PACKET_ID_MULTI;
 870         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
 871                 packet_id = V7_PACKET_ID_NEW;
 872         else if (byte[1] == 0x00 && byte[4] == 0x00)
 873                 packet_id = V7_PACKET_ID_IDLE;
 874         else
 875                 packet_id = V7_PACKET_ID_UNKNOWN;
 876
 877         return packet_id;
 878 }
 879
 880 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
 881                                           unsigned char *pkt,
 882                                           unsigned char pkt_id)
 883 {
 884         mt[0].x = ((pkt[2] & 0x80) << 4);
 885         mt[0].x |= ((pkt[2] & 0x3F) << 5);
 886         mt[0].x |= ((pkt[3] & 0x30) >> 1);
 887         mt[0].x |= (pkt[3] & 0x07);
 888         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
 889
 890         mt[1].x = ((pkt[3] & 0x80) << 4);
 891         mt[1].x |= ((pkt[4] & 0x80) << 3);
 892         mt[1].x |= ((pkt[4] & 0x3F) << 4);
 893         mt[1].y = ((pkt[5] & 0x80) << 3);
 894         mt[1].y |= ((pkt[5] & 0x3F) << 4);
 895
 896         switch (pkt_id) {
 897         case V7_PACKET_ID_TWO:
 898                 mt[1].x &= ~0x000F;
 899                 mt[1].y |= 0x000F;
 900                 break;
 901
 902         case V7_PACKET_ID_MULTI:
 903                 mt[1].x &= ~0x003F;
 904                 mt[1].y &= ~0x0020;
 905                 mt[1].y |= ((pkt[4] & 0x02) << 4);
 906                 mt[1].y |= 0x001F;
 907                 break;
 908
 909         case V7_PACKET_ID_NEW:
 910                 mt[1].x &= ~0x003F;
 911                 mt[1].x |= (pkt[0] & 0x20);
 912                 mt[1].y |= 0x000F;
 913                 break;
 914         }
 915
 916         mt[0].y = 0x7FF - mt[0].y;
 917         mt[1].y = 0x7FF - mt[1].y;
 918 }
 919
 920 static int alps_get_mt_count(struct input_mt_pos *mt)
 921 {
 922         int i;
 923
 924         for (i = 0; i < MAX_TOUCHES && mt[i].x != 0 && mt[i].y != 0; i++)
 925                 /* empty */;
 926
 927         return i;
 928 }
 929
 930 static int alps_decode_packet_v7(struct alps_fields *f,
 931                                   unsigned char *p,
 932                                   struct psmouse *psmouse)
 933 {
 934         unsigned char pkt_id;
 935
 936         pkt_id = alps_get_packet_id_v7(p);
 937         if (pkt_id == V7_PACKET_ID_IDLE)
 938                 return 0;
 939         if (pkt_id == V7_PACKET_ID_UNKNOWN)
 940                 return -1;
 941
 942         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
 943
 944         if (pkt_id == V7_PACKET_ID_TWO || pkt_id == V7_PACKET_ID_MULTI) {
 945                 f->left = (p[0] & 0x80) >> 7;
 946                 f->right = (p[0] & 0x20) >> 5;
 947                 f->middle = (p[0] & 0x10) >> 4;
 948         }
 949
 950         if (pkt_id == V7_PACKET_ID_TWO)
 951                 f->fingers = alps_get_mt_count(f->mt);
 952         else if (pkt_id == V7_PACKET_ID_MULTI)
 953                 f->fingers = 3 + (p[5] & 0x03);
 954
 955         return 0;
 956 }
 957
 958 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
 959 {
 960         struct alps_data *priv = psmouse->private;
 961         unsigned char *packet = psmouse->packet;
 962         struct input_dev *dev2 = priv->dev2;
 963         int x, y, z, left, right, middle;
 964
 965         /*
 966          *        b7 b6 b5 b4 b3 b2 b1 b0
 967          * Byte0   0  1  0  0  1  0  0  0
 968          * Byte1   1  1  *  *  1  M  R  L
 969          * Byte2  X7  1 X5 X4 X3 X2 X1 X0
 970          * Byte3  Z6  1 Y6 X6  1 Y2 Y1 Y0
 971          * Byte4  Y7  0 Y5 Y4 Y3  1  1  0
 972          * Byte5 T&P  0 Z5 Z4 Z3 Z2 Z1 Z0
 973          * M / R / L: Middle / Right / Left button
 974          */
 975
 976         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
 977         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
 978             ((packet[3] & 0x20) << 1);
 979         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
 980
 981         left = (packet[1] & 0x01);
 982         right = (packet[1] & 0x02) >> 1;
 983         middle = (packet[1] & 0x04) >> 2;
 984
 985         /* Divide 2 since trackpoint's speed is too fast */
 986         input_report_rel(dev2, REL_X, (char)x / 2);
 987         input_report_rel(dev2, REL_Y, -((char)y / 2));
 988
 989         input_report_key(dev2, BTN_LEFT, left);
 990         input_report_key(dev2, BTN_RIGHT, right);
 991         input_report_key(dev2, BTN_MIDDLE, middle);
 992
 993         input_sync(dev2);
 994 }
 995
 996 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
 997 {
 998         struct alps_data *priv = psmouse->private;
 999         struct input_dev *dev = psmouse->dev;
1000         struct alps_fields *f = &priv->f;
1001
1002         memset(f, 0, sizeof(*f));
1003
1004         if (priv->decode_fields(f, psmouse->packet, psmouse))
1005                 return;
1006
1007         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1008
1009         input_mt_report_finger_count(dev, f->fingers);
1010
1011         input_report_key(dev, BTN_LEFT, f->left);
1012         input_report_key(dev, BTN_RIGHT, f->right);
1013         input_report_key(dev, BTN_MIDDLE, f->middle);
1014
1015         input_sync(dev);
1016 }
1017
1018 static void alps_process_packet_v7(struct psmouse *psmouse)
1019 {
1020         unsigned char *packet = psmouse->packet;
1021
1022         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1023                 alps_process_trackstick_packet_v7(psmouse);
1024         else
1025                 alps_process_touchpad_packet_v7(psmouse);
1026 }
1027
1028 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1029                                         unsigned char packet[],
1030                                         bool report_buttons)
1031 {
1032         struct alps_data *priv = psmouse->private;
1033         struct input_dev *dev2 = priv->dev2;
1034
1035         if (report_buttons)
1036                 alps_report_buttons(psmouse, dev2, psmouse->dev,
1037                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1038
1039         input_report_rel(dev2, REL_X,
1040                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1041         input_report_rel(dev2, REL_Y,
1042                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1043
1044         input_sync(dev2);
1045 }
1046
1047 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1048 {
1049         struct alps_data *priv = psmouse->private;
1050
1051         if (psmouse->pktcnt < 6)
1052                 return PSMOUSE_GOOD_DATA;
1053
1054         if (psmouse->pktcnt == 6) {
1055                 /*
1056                  * Start a timer to flush the packet if it ends up last
1057                  * 6-byte packet in the stream. Timer needs to fire
1058                  * psmouse core times out itself. 20 ms should be enough
1059                  * to decide if we are getting more data or not.
1060                  */
1061                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1062                 return PSMOUSE_GOOD_DATA;
1063         }
1064
1065         del_timer(&priv->timer);
1066
1067         if (psmouse->packet[6] & 0x80) {
1068
1069                 /*
1070                  * Highest bit is set - that means we either had
1071                  * complete ALPS packet and this is start of the
1072                  * next packet or we got garbage.
1073                  */
1074
1075                 if (((psmouse->packet[3] |
1076                       psmouse->packet[4] |
1077                       psmouse->packet[5]) & 0x80) ||
1078                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1079                         psmouse_dbg(psmouse,
1080                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1081                                     psmouse->packet + 3);
1082                         return PSMOUSE_BAD_DATA;
1083                 }
1084
1085                 priv->process_packet(psmouse);
1086
1087                 /* Continue with the next packet */
1088                 psmouse->packet[0] = psmouse->packet[6];
1089                 psmouse->pktcnt = 1;
1090
1091         } else {
1092
1093                 /*
1094                  * High bit is 0 - that means that we indeed got a PS/2
1095                  * packet in the middle of ALPS packet.
1096                  *
1097                  * There is also possibility that we got 6-byte ALPS
1098                  * packet followed  by 3-byte packet from trackpoint. We
1099                  * can not distinguish between these 2 scenarios but
1100                  * because the latter is unlikely to happen in course of
1101                  * normal operation (user would need to press all
1102                  * buttons on the pad and start moving trackpoint
1103                  * without touching the pad surface) we assume former.
1104                  * Even if we are wrong the wost thing that would happen
1105                  * the cursor would jump but we should not get protocol
1106                  * de-synchronization.
1107                  */
1108
1109                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1110                                             false);
1111
1112                 /*
1113                  * Continue with the standard ALPS protocol handling,
1114                  * but make sure we won't process it as an interleaved
1115                  * packet again, which may happen if all buttons are
1116                  * pressed. To avoid this let's reset the 4th bit which
1117                  * is normally 1.
1118                  */
1119                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1120                 psmouse->pktcnt = 4;
1121         }
1122
1123         return PSMOUSE_GOOD_DATA;
1124 }
1125
1126 static void alps_flush_packet(unsigned long data)
1127 {
1128         struct psmouse *psmouse = (struct psmouse *)data;
1129         struct alps_data *priv = psmouse->private;
1130
1131         serio_pause_rx(psmouse->ps2dev.serio);
1132
1133         if (psmouse->pktcnt == psmouse->pktsize) {
1134
1135                 /*
1136                  * We did not any more data in reasonable amount of time.
1137                  * Validate the last 3 bytes and process as a standard
1138                  * ALPS packet.
1139                  */
1140                 if ((psmouse->packet[3] |
1141                      psmouse->packet[4] |
1142                      psmouse->packet[5]) & 0x80) {
1143                         psmouse_dbg(psmouse,
1144                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1145                                     psmouse->packet + 3);
1146                 } else {
1147                         priv->process_packet(psmouse);
1148                 }
1149                 psmouse->pktcnt = 0;
1150         }
1151
1152         serio_continue_rx(psmouse->ps2dev.serio);
1153 }
1154
1155 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1156 {
1157         struct alps_data *priv = psmouse->private;
1158
1159         /*
1160          * Check if we are dealing with a bare PS/2 packet, presumably from
1161          * a device connected to the external PS/2 port. Because bare PS/2
1162          * protocol does not have enough constant bits to self-synchronize
1163          * properly we only do this if the device is fully synchronized.
1164          */
1165         if (!psmouse->out_of_sync_cnt && (psmouse->packet[0] & 0xc8) == 0x08) {
1166                 if (psmouse->pktcnt == 3) {
1167                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1168                                                     true);
1169                         return PSMOUSE_FULL_PACKET;
1170                 }
1171                 return PSMOUSE_GOOD_DATA;
1172         }
1173
1174         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1175
1176         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1177             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1178                 return alps_handle_interleaved_ps2(psmouse);
1179         }
1180
1181         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1182                 psmouse_dbg(psmouse,
1183                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1184                             psmouse->packet[0], priv->mask0, priv->byte0);
1185                 return PSMOUSE_BAD_DATA;
1186         }
1187
1188         /* Bytes 2 - pktsize should have 0 in the highest bit */
1189         if (priv->proto_version < ALPS_PROTO_V5 &&
1190             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1191             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1192                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1193                             psmouse->pktcnt - 1,
1194                             psmouse->packet[psmouse->pktcnt - 1]);
1195
1196                 if (priv->proto_version == ALPS_PROTO_V3 &&
1197                     psmouse->pktcnt == psmouse->pktsize) {
1198                         /*
1199                          * Some Dell boxes, such as Latitude E6440 or E7440
1200                          * with closed lid, quite often smash last byte of
1201                          * otherwise valid packet with 0xff. Given that the
1202                          * next packet is very likely to be valid let's
1203                          * report PSMOUSE_FULL_PACKET but not process data,
1204                          * rather than reporting PSMOUSE_BAD_DATA and
1205                          * filling the logs.
1206                          */
1207                         return PSMOUSE_FULL_PACKET;
1208                 }
1209
1210                 return PSMOUSE_BAD_DATA;
1211         }
1212
1213         if (priv->proto_version == ALPS_PROTO_V7 &&
1214             !alps_is_valid_package_v7(psmouse)) {
1215                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1216                             psmouse->pktcnt - 1,
1217                             psmouse->packet[psmouse->pktcnt - 1]);
1218                 return PSMOUSE_BAD_DATA;
1219         }
1220
1221         if (psmouse->pktcnt == psmouse->pktsize) {
1222                 priv->process_packet(psmouse);
1223                 return PSMOUSE_FULL_PACKET;
1224         }
1225
1226         return PSMOUSE_GOOD_DATA;
1227 }
1228
1229 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1230 {
1231         struct ps2dev *ps2dev = &psmouse->ps2dev;
1232         struct alps_data *priv = psmouse->private;
1233         int command;
1234         unsigned char *param;
1235         unsigned char dummy[4];
1236
1237         BUG_ON(nibble > 0xf);
1238
1239         command = priv->nibble_commands[nibble].command;
1240         param = (command & 0x0f00) ?
1241                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1242
1243         if (ps2_command(ps2dev, param, command))
1244                 return -1;
1245
1246         return 0;
1247 }
1248
1249 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1250 {
1251         struct ps2dev *ps2dev = &psmouse->ps2dev;
1252         struct alps_data *priv = psmouse->private;
1253         int i, nibble;
1254
1255         if (ps2_command(ps2dev, NULL, priv->addr_command))
1256                 return -1;
1257
1258         for (i = 12; i >= 0; i -= 4) {
1259                 nibble = (addr >> i) & 0xf;
1260                 if (alps_command_mode_send_nibble(psmouse, nibble))
1261                         return -1;
1262         }
1263
1264         return 0;
1265 }
1266
1267 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1268 {
1269         struct ps2dev *ps2dev = &psmouse->ps2dev;
1270         unsigned char param[4];
1271
1272         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1273                 return -1;
1274
1275         /*
1276          * The address being read is returned in the first two bytes
1277          * of the result. Check that this address matches the expected
1278          * address.
1279          */
1280         if (addr != ((param[0] << 8) | param[1]))
1281                 return -1;
1282
1283         return param[2];
1284 }
1285
1286 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1287 {
1288         if (alps_command_mode_set_addr(psmouse, addr))
1289                 return -1;
1290         return __alps_command_mode_read_reg(psmouse, addr);
1291 }
1292
1293 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1294 {
1295         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1296                 return -1;
1297         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1298                 return -1;
1299         return 0;
1300 }
1301
1302 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1303                                        u8 value)
1304 {
1305         if (alps_command_mode_set_addr(psmouse, addr))
1306                 return -1;
1307         return __alps_command_mode_write_reg(psmouse, value);
1308 }
1309
1310 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1311                         int repeated_command, unsigned char *param)
1312 {
1313         struct ps2dev *ps2dev = &psmouse->ps2dev;
1314
1315         param[0] = 0;
1316         if (init_command && ps2_command(ps2dev, param, init_command))
1317                 return -EIO;
1318
1319         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1320             ps2_command(ps2dev,  NULL, repeated_command) ||
1321             ps2_command(ps2dev,  NULL, repeated_command))
1322                 return -EIO;
1323
1324         param[0] = param[1] = param[2] = 0xff;
1325         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1326                 return -EIO;
1327
1328         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1329                     repeated_command, param);
1330         return 0;
1331 }
1332
1333 static bool alps_check_valid_firmware_id(unsigned char id[])
1334 {
1335         if (id[0] == 0x73)
1336                 return true;
1337
1338         if (id[0] == 0x88 &&
1339             (id[1] == 0x07 ||
1340              id[1] == 0x08 ||
1341              (id[1] & 0xf0) == 0xb0 ||
1342              (id[1] & 0xf0) == 0xc0)) {
1343                 return true;
1344         }
1345
1346         return false;
1347 }
1348
1349 static int alps_enter_command_mode(struct psmouse *psmouse)
1350 {
1351         unsigned char param[4];
1352
1353         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1354                 psmouse_err(psmouse, "failed to enter command mode\n");
1355                 return -1;
1356         }
1357
1358         if (!alps_check_valid_firmware_id(param)) {
1359                 psmouse_dbg(psmouse,
1360                             "unknown response while entering command mode\n");
1361                 return -1;
1362         }
1363         return 0;
1364 }
1365
1366 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1367 {
1368         struct ps2dev *ps2dev = &psmouse->ps2dev;
1369         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1370                 return -1;
1371         return 0;
1372 }
1373
1374 /*
1375  * For DualPoint devices select the device that should respond to
1376  * subsequent commands. It looks like glidepad is behind stickpointer,
1377  * I'd thought it would be other way around...
1378  */
1379 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1380 {
1381         struct ps2dev *ps2dev = &psmouse->ps2dev;
1382         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1383
1384         if (ps2_command(ps2dev, NULL, cmd) ||
1385             ps2_command(ps2dev, NULL, cmd) ||
1386             ps2_command(ps2dev, NULL, cmd) ||
1387             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1388                 return -1;
1389
1390         /* we may get 3 more bytes, just ignore them */
1391         ps2_drain(ps2dev, 3, 100);
1392
1393         return 0;
1394 }
1395
1396 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1397 {
1398         struct ps2dev *ps2dev = &psmouse->ps2dev;
1399
1400         /* Try ALPS magic knock - 4 disable before enable */
1401         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1402             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1403             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1404             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1405             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1406                 return -1;
1407
1408         /*
1409          * Switch mouse to poll (remote) mode so motion data will not
1410          * get in our way
1411          */
1412         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1413 }
1414
1415 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1416 {
1417         int i, nibble;
1418
1419         /*
1420          * b0-b11 are valid bits, send sequence is inverse.
1421          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1422          */
1423         for (i = 0; i <= 8; i += 4) {
1424                 nibble = (word >> i) & 0xf;
1425                 if (alps_command_mode_send_nibble(psmouse, nibble))
1426                         return -1;
1427         }
1428
1429         return 0;
1430 }
1431
1432 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1433                                        u16 addr, u16 value)
1434 {
1435         struct ps2dev *ps2dev = &psmouse->ps2dev;
1436
1437         /* 0x0A0 is the command to write the word */
1438         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1439             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1440             alps_monitor_mode_send_word(psmouse, addr) ||
1441             alps_monitor_mode_send_word(psmouse, value) ||
1442             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1443                 return -1;
1444
1445         return 0;
1446 }
1447
1448 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1449 {
1450         struct ps2dev *ps2dev = &psmouse->ps2dev;
1451
1452         if (enable) {
1453                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1454                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1455                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1456                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1457                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1458                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1459                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1460                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1461                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1462                         return -1;
1463         } else {
1464                 /* EC to exit monitor mode */
1465                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1466                         return -1;
1467         }
1468
1469         return 0;
1470 }
1471
1472 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1473 {
1474         u16 reg_val = 0x181;
1475         int ret = -1;
1476
1477         /* enter monitor mode, to write the register */
1478         if (alps_monitor_mode(psmouse, true))
1479                 return -1;
1480
1481         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1482
1483         if (alps_monitor_mode(psmouse, false))
1484                 ret = -1;
1485
1486         return ret;
1487 }
1488
1489 static int alps_get_status(struct psmouse *psmouse, char *param)
1490 {
1491         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1492         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1493                 return -1;
1494
1495         return 0;
1496 }
1497
1498 /*
1499  * Turn touchpad tapping on or off. The sequences are:
1500  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1501  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1502  * My guess that 0xE9 (GetInfo) is here as a sync point.
1503  * For models that also have stickpointer (DualPoints) its tapping
1504  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1505  * we don't fiddle with it.
1506  */
1507 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1508 {
1509         struct ps2dev *ps2dev = &psmouse->ps2dev;
1510         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1511         unsigned char tap_arg = enable ? 0x0A : 0x00;
1512         unsigned char param[4];
1513
1514         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1515             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1516             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1517             ps2_command(ps2dev, &tap_arg, cmd))
1518                 return -1;
1519
1520         if (alps_get_status(psmouse, param))
1521                 return -1;
1522
1523         return 0;
1524 }
1525
1526 /*
1527  * alps_poll() - poll the touchpad for current motion packet.
1528  * Used in resync.
1529  */
1530 static int alps_poll(struct psmouse *psmouse)
1531 {
1532         struct alps_data *priv = psmouse->private;
1533         unsigned char buf[sizeof(psmouse->packet)];
1534         bool poll_failed;
1535
1536         if (priv->flags & ALPS_PASS)
1537                 alps_passthrough_mode_v2(psmouse, true);
1538
1539         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1540                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1541
1542         if (priv->flags & ALPS_PASS)
1543                 alps_passthrough_mode_v2(psmouse, false);
1544
1545         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1546                 return -1;
1547
1548         if ((psmouse->badbyte & 0xc8) == 0x08) {
1549 /*
1550  * Poll the track stick ...
1551  */
1552                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1553                         return -1;
1554         }
1555
1556         memcpy(psmouse->packet, buf, sizeof(buf));
1557         return 0;
1558 }
1559
1560 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1561 {
1562         struct alps_data *priv = psmouse->private;
1563
1564         if ((priv->flags & ALPS_PASS) &&
1565             alps_passthrough_mode_v2(psmouse, true)) {
1566                 return -1;
1567         }
1568
1569         if (alps_tap_mode(psmouse, true)) {
1570                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1571                 return -1;
1572         }
1573
1574         if (alps_absolute_mode_v1_v2(psmouse)) {
1575                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1576                 return -1;
1577         }
1578
1579         if ((priv->flags & ALPS_PASS) &&
1580             alps_passthrough_mode_v2(psmouse, false)) {
1581                 return -1;
1582         }
1583
1584         /* ALPS needs stream mode, otherwise it won't report any data */
1585         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1586                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1587                 return -1;
1588         }
1589
1590         return 0;
1591 }
1592
1593 static int alps_hw_init_v6(struct psmouse *psmouse)
1594 {
1595         unsigned char param[2] = {0xC8, 0x14};
1596
1597         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1598         if (alps_passthrough_mode_v2(psmouse, true))
1599                 return -1;
1600
1601         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1602             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1603             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1604             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1605             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1606                 return -1;
1607
1608         if (alps_passthrough_mode_v2(psmouse, false))
1609                 return -1;
1610
1611         if (alps_absolute_mode_v6(psmouse)) {
1612                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1613                 return -1;
1614         }
1615
1616         return 0;
1617 }
1618
1619 /*
1620  * Enable or disable passthrough mode to the trackstick.
1621  */
1622 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1623                                     int reg_base, bool enable)
1624 {
1625         int reg_val, ret = -1;
1626
1627         if (alps_enter_command_mode(psmouse))
1628                 return -1;
1629
1630         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1631         if (reg_val == -1)
1632                 goto error;
1633
1634         if (enable)
1635                 reg_val |= 0x01;
1636         else
1637                 reg_val &= ~0x01;
1638
1639         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1640
1641 error:
1642         if (alps_exit_command_mode(psmouse))
1643                 ret = -1;
1644         return ret;
1645 }
1646
1647 /* Must be in command mode when calling this function */
1648 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1649 {
1650         int reg_val;
1651
1652         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1653         if (reg_val == -1)
1654                 return -1;
1655
1656         reg_val |= 0x06;
1657         if (__alps_command_mode_write_reg(psmouse, reg_val))
1658                 return -1;
1659
1660         return 0;
1661 }
1662
1663 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
1664 {
1665         int ret = -EIO, reg_val;
1666
1667         if (alps_enter_command_mode(psmouse))
1668                 goto error;
1669
1670         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
1671         if (reg_val == -1)
1672                 goto error;
1673
1674         /* bit 7: trackstick is present */
1675         ret = reg_val & 0x80 ? 0 : -ENODEV;
1676
1677 error:
1678         alps_exit_command_mode(psmouse);
1679         return ret;
1680 }
1681
1682 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
1683 {
1684         struct ps2dev *ps2dev = &psmouse->ps2dev;
1685         int ret = 0;
1686         unsigned char param[4];
1687
1688         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
1689                 return -EIO;
1690
1691         /*
1692          * E7 report for the trackstick
1693          *
1694          * There have been reports of failures to seem to trace back
1695          * to the above trackstick check failing. When these occur
1696          * this E7 report fails, so when that happens we continue
1697          * with the assumption that there isn't a trackstick after
1698          * all.
1699          */
1700         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
1701                 psmouse_warn(psmouse, "trackstick E7 report failed\n");
1702                 ret = -ENODEV;
1703         } else {
1704                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
1705
1706                 /*
1707                  * Not sure what this does, but it is absolutely
1708                  * essential. Without it, the touchpad does not
1709                  * work at all and the trackstick just emits normal
1710                  * PS/2 packets.
1711                  */
1712                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1713                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1714                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1715                     alps_command_mode_send_nibble(psmouse, 0x9) ||
1716                     alps_command_mode_send_nibble(psmouse, 0x4)) {
1717                         psmouse_err(psmouse,
1718                                     "Error sending magic E6 sequence\n");
1719                         ret = -EIO;
1720                         goto error;
1721                 }
1722
1723                 /*
1724                  * This ensures the trackstick packets are in the format
1725                  * supported by this driver. If bit 1 isn't set the packet
1726                  * format is different.
1727                  */
1728                 if (alps_enter_command_mode(psmouse) ||
1729                     alps_command_mode_write_reg(psmouse,
1730                                                 reg_base + 0x08, 0x82) ||
1731                     alps_exit_command_mode(psmouse))
1732                         ret = -EIO;
1733         }
1734
1735 error:
1736         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
1737                 ret = -EIO;
1738
1739         return ret;
1740 }
1741
1742 static int alps_hw_init_v3(struct psmouse *psmouse)
1743 {
1744         struct ps2dev *ps2dev = &psmouse->ps2dev;
1745         int reg_val;
1746         unsigned char param[4];
1747
1748         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
1749         if (reg_val == -EIO)
1750                 goto error;
1751
1752         if (reg_val == 0 &&
1753             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
1754                 goto error;
1755
1756         if (alps_enter_command_mode(psmouse) ||
1757             alps_absolute_mode_v3(psmouse)) {
1758                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1759                 goto error;
1760         }
1761
1762         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1763         if (reg_val == -1)
1764                 goto error;
1765         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1766                 goto error;
1767
1768         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1769         if (reg_val == -1)
1770                 goto error;
1771         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1772                 goto error;
1773
1774         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1775                 goto error;
1776         if (__alps_command_mode_write_reg(psmouse, 0x04))
1777                 goto error;
1778
1779         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1780                 goto error;
1781         if (__alps_command_mode_write_reg(psmouse, 0x03))
1782                 goto error;
1783
1784         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1785                 goto error;
1786         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1787                 goto error;
1788
1789         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1790                 goto error;
1791         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1792                 goto error;
1793
1794         alps_exit_command_mode(psmouse);
1795
1796         /* Set rate and enable data reporting */
1797         param[0] = 0x64;
1798         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1799             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1800                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1801                 return -1;
1802         }
1803
1804         return 0;
1805
1806 error:
1807         /*
1808          * Leaving the touchpad in command mode will essentially render
1809          * it unusable until the machine reboots, so exit it here just
1810          * to be safe
1811          */
1812         alps_exit_command_mode(psmouse);
1813         return -1;
1814 }
1815
1816 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
1817 {
1818         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
1819         struct alps_data *priv = psmouse->private;
1820
1821         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
1822         if (reg < 0)
1823                 return reg;
1824
1825         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1826         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
1827
1828         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
1829         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
1830
1831         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
1832         if (reg < 0)
1833                 return reg;
1834
1835         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1836         x_electrode = 17 + x_electrode;
1837
1838         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
1839         y_electrode = 13 + y_electrode;
1840
1841         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
1842         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
1843
1844         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
1845         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
1846
1847         psmouse_dbg(psmouse,
1848                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
1849                     x_pitch, y_pitch, x_electrode, y_electrode,
1850                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
1851
1852         return 0;
1853 }
1854
1855 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
1856 {
1857         struct alps_data *priv = psmouse->private;
1858         struct ps2dev *ps2dev = &psmouse->ps2dev;
1859         int reg_val, ret = -1;
1860
1861         if (priv->flags & ALPS_DUALPOINT) {
1862                 reg_val = alps_setup_trackstick_v3(psmouse,
1863                                                    ALPS_REG_BASE_RUSHMORE);
1864                 if (reg_val == -EIO)
1865                         goto error;
1866                 if (reg_val == -ENODEV)
1867                         priv->flags &= ~ALPS_DUALPOINT;
1868         }
1869
1870         if (alps_enter_command_mode(psmouse) ||
1871             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
1872             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
1873                 goto error;
1874
1875         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
1876                 goto error;
1877
1878         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
1879         if (reg_val == -1)
1880                 goto error;
1881         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
1882                 goto error;
1883
1884         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
1885                 goto error;
1886
1887         /* enter absolute mode */
1888         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
1889         if (reg_val == -1)
1890                 goto error;
1891         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
1892                 goto error;
1893
1894         alps_exit_command_mode(psmouse);
1895         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1896
1897 error:
1898         alps_exit_command_mode(psmouse);
1899         return ret;
1900 }
1901
1902 /* Must be in command mode when calling this function */
1903 static int alps_absolute_mode_v4(struct psmouse *psmouse)
1904 {
1905         int reg_val;
1906
1907         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1908         if (reg_val == -1)
1909                 return -1;
1910
1911         reg_val |= 0x02;
1912         if (__alps_command_mode_write_reg(psmouse, reg_val))
1913                 return -1;
1914
1915         return 0;
1916 }
1917
1918 static int alps_hw_init_v4(struct psmouse *psmouse)
1919 {
1920         struct ps2dev *ps2dev = &psmouse->ps2dev;
1921         unsigned char param[4];
1922
1923         if (alps_enter_command_mode(psmouse))
1924                 goto error;
1925
1926         if (alps_absolute_mode_v4(psmouse)) {
1927                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1928                 goto error;
1929         }
1930
1931         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
1932                 goto error;
1933
1934         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
1935                 goto error;
1936
1937         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
1938                 goto error;
1939
1940         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
1941                 goto error;
1942
1943         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
1944                 goto error;
1945
1946         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
1947                 goto error;
1948
1949         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
1950                 goto error;
1951
1952         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
1953                 goto error;
1954
1955         alps_exit_command_mode(psmouse);
1956
1957         /*
1958          * This sequence changes the output from a 9-byte to an
1959          * 8-byte format. All the same data seems to be present,
1960          * just in a more compact format.
1961          */
1962         param[0] = 0xc8;
1963         param[1] = 0x64;
1964         param[2] = 0x50;
1965         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1966             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
1967             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
1968             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1969                 return -1;
1970
1971         /* Set rate and enable data reporting */
1972         param[0] = 0x64;
1973         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1974             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1975                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1976                 return -1;
1977         }
1978
1979         return 0;
1980
1981 error:
1982         /*
1983          * Leaving the touchpad in command mode will essentially render
1984          * it unusable until the machine reboots, so exit it here just
1985          * to be safe
1986          */
1987         alps_exit_command_mode(psmouse);
1988         return -1;
1989 }
1990
1991 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
1992                                         struct alps_data *priv)
1993 {
1994         struct ps2dev *ps2dev = &psmouse->ps2dev;
1995         unsigned char param[4] = {0};
1996         int num_x_electrode, num_y_electrode;
1997
1998         if (alps_enter_command_mode(psmouse))
1999                 return -1;
2000
2001         param[0] = 0x0a;
2002         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2003             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2004             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2005             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2006             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2007                 return -1;
2008
2009         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2010                 return -1;
2011
2012         /*
2013          * Dolphin's sensor line number is not fixed. It can be calculated
2014          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2015          * Further more, we can get device's x_max and y_max by multiplying
2016          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2017          *
2018          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2019          *      real sensor line number X = 11 + 8 = 19, and
2020          *      real sensor line number Y = 8 + 1 = 9.
2021          *      So, x_max = (19 - 1) * 64 = 1152, and
2022          *          y_max = (9 - 1) * 64 = 512.
2023          */
2024         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2025         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2026         priv->x_bits = num_x_electrode;
2027         priv->y_bits = num_y_electrode;
2028         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2029         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2030
2031         if (alps_exit_command_mode(psmouse))
2032                 return -1;
2033
2034         return 0;
2035 }
2036
2037 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2038 {
2039         struct ps2dev *ps2dev = &psmouse->ps2dev;
2040         unsigned char param[2];
2041
2042         /* This is dolphin "v1" as empirically defined by florin9doi */
2043         param[0] = 0x64;
2044         param[1] = 0x28;
2045
2046         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2047             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2048             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2049                 return -1;
2050
2051         return 0;
2052 }
2053
2054 static int alps_hw_init_v7(struct psmouse *psmouse)
2055 {
2056         struct ps2dev *ps2dev = &psmouse->ps2dev;
2057         int reg_val, ret = -1;
2058
2059         if (alps_enter_command_mode(psmouse) ||
2060             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2061                 goto error;
2062
2063         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2064                 goto error;
2065
2066         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2067                 goto error;
2068
2069         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2070         if (reg_val == -1)
2071                 goto error;
2072         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2073                 goto error;
2074
2075         alps_exit_command_mode(psmouse);
2076         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2077
2078 error:
2079         alps_exit_command_mode(psmouse);
2080         return ret;
2081 }
2082
2083 static void alps_set_defaults(struct alps_data *priv)
2084 {
2085         priv->byte0 = 0x8f;
2086         priv->mask0 = 0x8f;
2087         priv->flags = ALPS_DUALPOINT;
2088
2089         priv->x_max = 2000;
2090         priv->y_max = 1400;
2091         priv->x_bits = 15;
2092         priv->y_bits = 11;
2093
2094         switch (priv->proto_version) {
2095         case ALPS_PROTO_V1:
2096         case ALPS_PROTO_V2:
2097                 priv->hw_init = alps_hw_init_v1_v2;
2098                 priv->process_packet = alps_process_packet_v1_v2;
2099                 priv->set_abs_params = alps_set_abs_params_st;
2100                 priv->x_max = 1023;
2101                 priv->y_max = 767;
2102                 break;
2103         case ALPS_PROTO_V3:
2104                 priv->hw_init = alps_hw_init_v3;
2105                 priv->process_packet = alps_process_packet_v3;
2106                 priv->set_abs_params = alps_set_abs_params_mt;
2107                 priv->decode_fields = alps_decode_pinnacle;
2108                 priv->nibble_commands = alps_v3_nibble_commands;
2109                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2110                 break;
2111         case ALPS_PROTO_V4:
2112                 priv->hw_init = alps_hw_init_v4;
2113                 priv->process_packet = alps_process_packet_v4;
2114                 priv->set_abs_params = alps_set_abs_params_mt;
2115                 priv->nibble_commands = alps_v4_nibble_commands;
2116                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2117                 break;
2118         case ALPS_PROTO_V5:
2119                 priv->hw_init = alps_hw_init_dolphin_v1;
2120                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2121                 priv->decode_fields = alps_decode_dolphin;
2122                 priv->set_abs_params = alps_set_abs_params_mt;
2123                 priv->nibble_commands = alps_v3_nibble_commands;
2124                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2125                 priv->byte0 = 0xc8;
2126                 priv->mask0 = 0xd8;
2127                 priv->flags = 0;
2128                 priv->x_max = 1360;
2129                 priv->y_max = 660;
2130                 priv->x_bits = 23;
2131                 priv->y_bits = 12;
2132                 break;
2133         case ALPS_PROTO_V6:
2134                 priv->hw_init = alps_hw_init_v6;
2135                 priv->process_packet = alps_process_packet_v6;
2136                 priv->set_abs_params = alps_set_abs_params_st;
2137                 priv->nibble_commands = alps_v6_nibble_commands;
2138                 priv->x_max = 2047;
2139                 priv->y_max = 1535;
2140                 break;
2141         case ALPS_PROTO_V7:
2142                 priv->hw_init = alps_hw_init_v7;
2143                 priv->process_packet = alps_process_packet_v7;
2144                 priv->decode_fields = alps_decode_packet_v7;
2145                 priv->set_abs_params = alps_set_abs_params_mt;
2146                 priv->nibble_commands = alps_v3_nibble_commands;
2147                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2148                 priv->x_max = 0xfff;
2149                 priv->y_max = 0x7ff;
2150                 priv->byte0 = 0x48;
2151                 priv->mask0 = 0x48;
2152
2153                 if (priv->fw_ver[1] != 0xba)
2154                         priv->flags |= ALPS_BUTTONPAD;
2155                 break;
2156         }
2157 }
2158
2159 static int alps_match_table(struct psmouse *psmouse, struct alps_data *priv,
2160                             unsigned char *e7, unsigned char *ec)
2161 {
2162         const struct alps_model_info *model;
2163         int i;
2164
2165         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2166                 model = &alps_model_data[i];
2167
2168                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2169                     (!model->command_mode_resp ||
2170                      model->command_mode_resp == ec[2])) {
2171
2172                         priv->proto_version = model->proto_version;
2173                         alps_set_defaults(priv);
2174
2175                         priv->flags = model->flags;
2176                         priv->byte0 = model->byte0;
2177                         priv->mask0 = model->mask0;
2178
2179                         return 0;
2180                 }
2181         }
2182
2183         return -EINVAL;
2184 }
2185
2186 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2187 {
2188         unsigned char e6[4], e7[4], ec[4];
2189
2190         /*
2191          * First try "E6 report".
2192          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2193          * The bits 0-2 of the first byte will be 1s if some buttons are
2194          * pressed.
2195          */
2196         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2197                          PSMOUSE_CMD_SETSCALE11, e6))
2198                 return -EIO;
2199
2200         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2201                 return -EINVAL;
2202
2203         /*
2204          * Now get the "E7" and "EC" reports.  These will uniquely identify
2205          * most ALPS touchpads.
2206          */
2207         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2208                          PSMOUSE_CMD_SETSCALE21, e7) ||
2209             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2210                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2211             alps_exit_command_mode(psmouse))
2212                 return -EIO;
2213
2214         /* Save the Firmware version */
2215         memcpy(priv->fw_ver, ec, 3);
2216
2217         if (alps_match_table(psmouse, priv, e7, ec) == 0) {
2218                 return 0;
2219         } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2220                    ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2221                 priv->proto_version = ALPS_PROTO_V5;
2222                 alps_set_defaults(priv);
2223                 if (alps_dolphin_get_device_area(psmouse, priv))
2224                         return -EIO;
2225                 else
2226                         return 0;
2227         } else if (ec[0] == 0x88 &&
2228                    ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2229                 priv->proto_version = ALPS_PROTO_V7;
2230                 alps_set_defaults(priv);
2231
2232                 return 0;
2233         } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2234                 priv->proto_version = ALPS_PROTO_V3;
2235                 alps_set_defaults(priv);
2236
2237                 priv->hw_init = alps_hw_init_rushmore_v3;
2238                 priv->decode_fields = alps_decode_rushmore;
2239                 priv->x_bits = 16;
2240                 priv->y_bits = 12;
2241                 priv->flags |= ALPS_IS_RUSHMORE;
2242
2243                 /* hack to make addr_command, nibble_command available */
2244                 psmouse->private = priv;
2245
2246                 if (alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_RUSHMORE))
2247                         priv->flags &= ~ALPS_DUALPOINT;
2248
2249                 return 0;
2250         } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2251                    ec[2] >= 0x90 && ec[2] <= 0x9d) {
2252                 priv->proto_version = ALPS_PROTO_V3;
2253                 alps_set_defaults(priv);
2254
2255                 return 0;
2256         }
2257
2258         psmouse_dbg(psmouse,
2259                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2260
2261         return -EINVAL;
2262 }
2263
2264 static int alps_reconnect(struct psmouse *psmouse)
2265 {
2266         struct alps_data *priv = psmouse->private;
2267
2268         psmouse_reset(psmouse);
2269
2270         if (alps_identify(psmouse, priv) < 0)
2271                 return -1;
2272
2273         return priv->hw_init(psmouse);
2274 }
2275
2276 static void alps_disconnect(struct psmouse *psmouse)
2277 {
2278         struct alps_data *priv = psmouse->private;
2279
2280         psmouse_reset(psmouse);
2281         del_timer_sync(&priv->timer);
2282         input_unregister_device(priv->dev2);
2283         kfree(priv);
2284 }
2285
2286 static void alps_set_abs_params_st(struct alps_data *priv,
2287                                    struct input_dev *dev1)
2288 {
2289         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2290         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2291 }
2292
2293 static void alps_set_abs_params_mt(struct alps_data *priv,
2294                                    struct input_dev *dev1)
2295 {
2296         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2297         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2298
2299         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2300         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2301
2302         input_mt_init_slots(dev1, MAX_TOUCHES, INPUT_MT_POINTER |
2303                 INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2304
2305         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2306         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2307
2308         /* V7 is real multi-touch */
2309         if (priv->proto_version == ALPS_PROTO_V7)
2310                 clear_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
2311 }
2312
2313 int alps_init(struct psmouse *psmouse)
2314 {
2315         struct alps_data *priv;
2316         struct input_dev *dev1 = psmouse->dev, *dev2;
2317
2318         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2319         dev2 = input_allocate_device();
2320         if (!priv || !dev2)
2321                 goto init_fail;
2322
2323         priv->dev2 = dev2;
2324         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2325
2326         psmouse->private = priv;
2327
2328         psmouse_reset(psmouse);
2329
2330         if (alps_identify(psmouse, priv) < 0)
2331                 goto init_fail;
2332
2333         if (priv->hw_init(psmouse))
2334                 goto init_fail;
2335
2336         /*
2337          * Undo part of setup done for us by psmouse core since touchpad
2338          * is not a relative device.
2339          */
2340         __clear_bit(EV_REL, dev1->evbit);
2341         __clear_bit(REL_X, dev1->relbit);
2342         __clear_bit(REL_Y, dev1->relbit);
2343
2344         /*
2345          * Now set up our capabilities.
2346          */
2347         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2348         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2349         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2350         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2351                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2352
2353         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2354
2355         priv->set_abs_params(priv, dev1);
2356         /* No pressure on V7 */
2357         if (priv->proto_version != ALPS_PROTO_V7)
2358                 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2359
2360         if (priv->flags & ALPS_WHEEL) {
2361                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2362                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2363         }
2364
2365         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2366                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2367                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2368         }
2369
2370         if (priv->flags & ALPS_FOUR_BUTTONS) {
2371                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2372                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2373                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2374                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2375         } else if (priv->flags & ALPS_BUTTONPAD) {
2376                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2377                 clear_bit(BTN_RIGHT, dev1->keybit);
2378         } else {
2379                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2380         }
2381
2382         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
2383         dev2->phys = priv->phys;
2384         dev2->name = (priv->flags & ALPS_DUALPOINT) ?
2385                      "DualPoint Stick" : "ALPS PS/2 Device";
2386         dev2->id.bustype = BUS_I8042;
2387         dev2->id.vendor  = 0x0002;
2388         dev2->id.product = PSMOUSE_ALPS;
2389         dev2->id.version = 0x0000;
2390         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2391
2392         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
2393         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
2394         dev2->keybit[BIT_WORD(BTN_LEFT)] =
2395                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
2396
2397         __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2398         if (priv->flags & ALPS_DUALPOINT)
2399                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2400
2401         if (input_register_device(priv->dev2))
2402                 goto init_fail;
2403
2404         psmouse->protocol_handler = alps_process_byte;
2405         psmouse->poll = alps_poll;
2406         psmouse->disconnect = alps_disconnect;
2407         psmouse->reconnect = alps_reconnect;
2408         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2409
2410         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2411         psmouse->resync_time = 0;
2412
2413         /* Allow 2 invalid packets without resetting device */
2414         psmouse->resetafter = psmouse->pktsize * 2;
2415
2416         return 0;
2417
2418 init_fail:
2419         psmouse_reset(psmouse);
2420         input_free_device(dev2);
2421         kfree(priv);
2422         psmouse->private = NULL;
2423         return -1;
2424 }
2425
2426 int alps_detect(struct psmouse *psmouse, bool set_properties)
2427 {
2428         struct alps_data dummy;
2429
2430         if (alps_identify(psmouse, &dummy) < 0)
2431                 return -1;
2432
2433         if (set_properties) {
2434                 psmouse->vendor = "ALPS";
2435                 psmouse->name = dummy.flags & ALPS_DUALPOINT ?
2436                                 "DualPoint TouchPad" : "GlidePoint";
2437                 psmouse->model = dummy.proto_version << 8;
2438         }
2439         return 0;
2440 }
2441