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, fingers = 0;
 923
 924         for (i = 0; i < MAX_TOUCHES; i++) {
 925                 if (mt[i].x != 0 || mt[i].y != 0)
 926                         fingers++;
 927         }
 928
 929         return fingers;
 930 }
 931
 932 static int alps_decode_packet_v7(struct alps_fields *f,
 933                                   unsigned char *p,
 934                                   struct psmouse *psmouse)
 935 {
 936         unsigned char pkt_id;
 937
 938         pkt_id = alps_get_packet_id_v7(p);
 939         if (pkt_id == V7_PACKET_ID_IDLE)
 940                 return 0;
 941         if (pkt_id == V7_PACKET_ID_UNKNOWN)
 942                 return -1;
 943         /*
 944          * NEW packets are send to indicate a discontinuity in the finger
 945          * coordinate reporting. Specifically a finger may have moved from
 946          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
 947          * us.
 948          *
 949          * NEW packets have 3 problems:
 950          * 1) They do not contain middle / right button info (on non clickpads)
 951          *    this can be worked around by preserving the old button state
 952          * 2) They do not contain an accurate fingercount, and they are
 953          *    typically send when the number of fingers changes. We cannot use
 954          *    the old finger count as that may mismatch with the amount of
 955          *    touch coordinates we've available in the NEW packet
 956          * 3) Their x data for the second touch is inaccurate leading to
 957          *    a possible jump of the x coordinate by 16 units when the first
 958          *    non NEW packet comes in
 959          * Since problems 2 & 3 cannot be worked around, just ignore them.
 960          */
 961         if (pkt_id == V7_PACKET_ID_NEW)
 962                 return 1;
 963
 964         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
 965
 966         f->left = (p[0] & 0x80) >> 7;
 967         f->right = (p[0] & 0x20) >> 5;
 968         f->middle = (p[0] & 0x10) >> 4;
 969
 970         if (pkt_id == V7_PACKET_ID_TWO)
 971                 f->fingers = alps_get_mt_count(f->mt);
 972         else /* pkt_id == V7_PACKET_ID_MULTI */
 973                 f->fingers = 3 + (p[5] & 0x03);
 974
 975         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
 976         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
 977                 f->mt[0].x = f->mt[1].x;
 978                 f->mt[0].y = f->mt[1].y;
 979                 f->mt[1].x = 0;
 980                 f->mt[1].y = 0;
 981         }
 982
 983         return 0;
 984 }
 985
 986 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
 987 {
 988         struct alps_data *priv = psmouse->private;
 989         unsigned char *packet = psmouse->packet;
 990         struct input_dev *dev2 = priv->dev2;
 991         int x, y, z, left, right, middle;
 992
 993         /*
 994          *        b7 b6 b5 b4 b3 b2 b1 b0
 995          * Byte0   0  1  0  0  1  0  0  0
 996          * Byte1   1  1  *  *  1  M  R  L
 997          * Byte2  X7  1 X5 X4 X3 X2 X1 X0
 998          * Byte3  Z6  1 Y6 X6  1 Y2 Y1 Y0
 999          * Byte4  Y7  0 Y5 Y4 Y3  1  1  0
1000          * Byte5 T&P  0 Z5 Z4 Z3 Z2 Z1 Z0
1001          * M / R / L: Middle / Right / Left button
1002          */
1003
1004         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1005         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1006             ((packet[3] & 0x20) << 1);
1007         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1008
1009         left = (packet[1] & 0x01);
1010         right = (packet[1] & 0x02) >> 1;
1011         middle = (packet[1] & 0x04) >> 2;
1012
1013         /* Divide 2 since trackpoint's speed is too fast */
1014         input_report_rel(dev2, REL_X, (char)x / 2);
1015         input_report_rel(dev2, REL_Y, -((char)y / 2));
1016
1017         input_report_key(dev2, BTN_LEFT, left);
1018         input_report_key(dev2, BTN_RIGHT, right);
1019         input_report_key(dev2, BTN_MIDDLE, middle);
1020
1021         input_sync(dev2);
1022 }
1023
1024 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1025 {
1026         struct alps_data *priv = psmouse->private;
1027         struct input_dev *dev = psmouse->dev;
1028         struct alps_fields *f = &priv->f;
1029
1030         memset(f, 0, sizeof(*f));
1031
1032         if (priv->decode_fields(f, psmouse->packet, psmouse))
1033                 return;
1034
1035         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1036
1037         input_mt_report_finger_count(dev, f->fingers);
1038
1039         input_report_key(dev, BTN_LEFT, f->left);
1040         input_report_key(dev, BTN_RIGHT, f->right);
1041         input_report_key(dev, BTN_MIDDLE, f->middle);
1042
1043         input_sync(dev);
1044 }
1045
1046 static void alps_process_packet_v7(struct psmouse *psmouse)
1047 {
1048         unsigned char *packet = psmouse->packet;
1049
1050         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1051                 alps_process_trackstick_packet_v7(psmouse);
1052         else
1053                 alps_process_touchpad_packet_v7(psmouse);
1054 }
1055
1056 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1057                                         unsigned char packet[],
1058                                         bool report_buttons)
1059 {
1060         struct alps_data *priv = psmouse->private;
1061         struct input_dev *dev2 = priv->dev2;
1062
1063         if (report_buttons)
1064                 alps_report_buttons(psmouse, dev2, psmouse->dev,
1065                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1066
1067         input_report_rel(dev2, REL_X,
1068                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1069         input_report_rel(dev2, REL_Y,
1070                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1071
1072         input_sync(dev2);
1073 }
1074
1075 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1076 {
1077         struct alps_data *priv = psmouse->private;
1078
1079         if (psmouse->pktcnt < 6)
1080                 return PSMOUSE_GOOD_DATA;
1081
1082         if (psmouse->pktcnt == 6) {
1083                 /*
1084                  * Start a timer to flush the packet if it ends up last
1085                  * 6-byte packet in the stream. Timer needs to fire
1086                  * psmouse core times out itself. 20 ms should be enough
1087                  * to decide if we are getting more data or not.
1088                  */
1089                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1090                 return PSMOUSE_GOOD_DATA;
1091         }
1092
1093         del_timer(&priv->timer);
1094
1095         if (psmouse->packet[6] & 0x80) {
1096
1097                 /*
1098                  * Highest bit is set - that means we either had
1099                  * complete ALPS packet and this is start of the
1100                  * next packet or we got garbage.
1101                  */
1102
1103                 if (((psmouse->packet[3] |
1104                       psmouse->packet[4] |
1105                       psmouse->packet[5]) & 0x80) ||
1106                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1107                         psmouse_dbg(psmouse,
1108                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1109                                     psmouse->packet + 3);
1110                         return PSMOUSE_BAD_DATA;
1111                 }
1112
1113                 priv->process_packet(psmouse);
1114
1115                 /* Continue with the next packet */
1116                 psmouse->packet[0] = psmouse->packet[6];
1117                 psmouse->pktcnt = 1;
1118
1119         } else {
1120
1121                 /*
1122                  * High bit is 0 - that means that we indeed got a PS/2
1123                  * packet in the middle of ALPS packet.
1124                  *
1125                  * There is also possibility that we got 6-byte ALPS
1126                  * packet followed  by 3-byte packet from trackpoint. We
1127                  * can not distinguish between these 2 scenarios but
1128                  * because the latter is unlikely to happen in course of
1129                  * normal operation (user would need to press all
1130                  * buttons on the pad and start moving trackpoint
1131                  * without touching the pad surface) we assume former.
1132                  * Even if we are wrong the wost thing that would happen
1133                  * the cursor would jump but we should not get protocol
1134                  * de-synchronization.
1135                  */
1136
1137                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1138                                             false);
1139
1140                 /*
1141                  * Continue with the standard ALPS protocol handling,
1142                  * but make sure we won't process it as an interleaved
1143                  * packet again, which may happen if all buttons are
1144                  * pressed. To avoid this let's reset the 4th bit which
1145                  * is normally 1.
1146                  */
1147                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1148                 psmouse->pktcnt = 4;
1149         }
1150
1151         return PSMOUSE_GOOD_DATA;
1152 }
1153
1154 static void alps_flush_packet(unsigned long data)
1155 {
1156         struct psmouse *psmouse = (struct psmouse *)data;
1157         struct alps_data *priv = psmouse->private;
1158
1159         serio_pause_rx(psmouse->ps2dev.serio);
1160
1161         if (psmouse->pktcnt == psmouse->pktsize) {
1162
1163                 /*
1164                  * We did not any more data in reasonable amount of time.
1165                  * Validate the last 3 bytes and process as a standard
1166                  * ALPS packet.
1167                  */
1168                 if ((psmouse->packet[3] |
1169                      psmouse->packet[4] |
1170                      psmouse->packet[5]) & 0x80) {
1171                         psmouse_dbg(psmouse,
1172                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1173                                     psmouse->packet + 3);
1174                 } else {
1175                         priv->process_packet(psmouse);
1176                 }
1177                 psmouse->pktcnt = 0;
1178         }
1179
1180         serio_continue_rx(psmouse->ps2dev.serio);
1181 }
1182
1183 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1184 {
1185         struct alps_data *priv = psmouse->private;
1186
1187         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
1188                 if (psmouse->pktcnt == 3) {
1189                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1190                                                     true);
1191                         return PSMOUSE_FULL_PACKET;
1192                 }
1193                 return PSMOUSE_GOOD_DATA;
1194         }
1195
1196         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1197
1198         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1199             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1200                 return alps_handle_interleaved_ps2(psmouse);
1201         }
1202
1203         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1204                 psmouse_dbg(psmouse,
1205                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1206                             psmouse->packet[0], priv->mask0, priv->byte0);
1207                 return PSMOUSE_BAD_DATA;
1208         }
1209
1210         /* Bytes 2 - pktsize should have 0 in the highest bit */
1211         if ((priv->proto_version < ALPS_PROTO_V5) &&
1212             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1213             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1214                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1215                             psmouse->pktcnt - 1,
1216                             psmouse->packet[psmouse->pktcnt - 1]);
1217                 return PSMOUSE_BAD_DATA;
1218         }
1219
1220         if (priv->proto_version == ALPS_PROTO_V7 &&
1221             !alps_is_valid_package_v7(psmouse)) {
1222                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1223                             psmouse->pktcnt - 1,
1224                             psmouse->packet[psmouse->pktcnt - 1]);
1225                 return PSMOUSE_BAD_DATA;
1226         }
1227
1228         if (psmouse->pktcnt == psmouse->pktsize) {
1229                 priv->process_packet(psmouse);
1230                 return PSMOUSE_FULL_PACKET;
1231         }
1232
1233         return PSMOUSE_GOOD_DATA;
1234 }
1235
1236 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1237 {
1238         struct ps2dev *ps2dev = &psmouse->ps2dev;
1239         struct alps_data *priv = psmouse->private;
1240         int command;
1241         unsigned char *param;
1242         unsigned char dummy[4];
1243
1244         BUG_ON(nibble > 0xf);
1245
1246         command = priv->nibble_commands[nibble].command;
1247         param = (command & 0x0f00) ?
1248                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1249
1250         if (ps2_command(ps2dev, param, command))
1251                 return -1;
1252
1253         return 0;
1254 }
1255
1256 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1257 {
1258         struct ps2dev *ps2dev = &psmouse->ps2dev;
1259         struct alps_data *priv = psmouse->private;
1260         int i, nibble;
1261
1262         if (ps2_command(ps2dev, NULL, priv->addr_command))
1263                 return -1;
1264
1265         for (i = 12; i >= 0; i -= 4) {
1266                 nibble = (addr >> i) & 0xf;
1267                 if (alps_command_mode_send_nibble(psmouse, nibble))
1268                         return -1;
1269         }
1270
1271         return 0;
1272 }
1273
1274 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1275 {
1276         struct ps2dev *ps2dev = &psmouse->ps2dev;
1277         unsigned char param[4];
1278
1279         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1280                 return -1;
1281
1282         /*
1283          * The address being read is returned in the first two bytes
1284          * of the result. Check that this address matches the expected
1285          * address.
1286          */
1287         if (addr != ((param[0] << 8) | param[1]))
1288                 return -1;
1289
1290         return param[2];
1291 }
1292
1293 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1294 {
1295         if (alps_command_mode_set_addr(psmouse, addr))
1296                 return -1;
1297         return __alps_command_mode_read_reg(psmouse, addr);
1298 }
1299
1300 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1301 {
1302         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1303                 return -1;
1304         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1305                 return -1;
1306         return 0;
1307 }
1308
1309 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1310                                        u8 value)
1311 {
1312         if (alps_command_mode_set_addr(psmouse, addr))
1313                 return -1;
1314         return __alps_command_mode_write_reg(psmouse, value);
1315 }
1316
1317 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1318                         int repeated_command, unsigned char *param)
1319 {
1320         struct ps2dev *ps2dev = &psmouse->ps2dev;
1321
1322         param[0] = 0;
1323         if (init_command && ps2_command(ps2dev, param, init_command))
1324                 return -EIO;
1325
1326         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1327             ps2_command(ps2dev,  NULL, repeated_command) ||
1328             ps2_command(ps2dev,  NULL, repeated_command))
1329                 return -EIO;
1330
1331         param[0] = param[1] = param[2] = 0xff;
1332         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1333                 return -EIO;
1334
1335         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1336                     repeated_command, param);
1337         return 0;
1338 }
1339
1340 static bool alps_check_valid_firmware_id(unsigned char id[])
1341 {
1342         if (id[0] == 0x73)
1343                 return true;
1344
1345         if (id[0] == 0x88 &&
1346             (id[1] == 0x07 ||
1347              id[1] == 0x08 ||
1348              (id[1] & 0xf0) == 0xb0 ||
1349              (id[1] & 0xf0) == 0xc0)) {
1350                 return true;
1351         }
1352
1353         return false;
1354 }
1355
1356 static int alps_enter_command_mode(struct psmouse *psmouse)
1357 {
1358         unsigned char param[4];
1359
1360         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1361                 psmouse_err(psmouse, "failed to enter command mode\n");
1362                 return -1;
1363         }
1364
1365         if (!alps_check_valid_firmware_id(param)) {
1366                 psmouse_dbg(psmouse,
1367                             "unknown response while entering command mode\n");
1368                 return -1;
1369         }
1370         return 0;
1371 }
1372
1373 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1374 {
1375         struct ps2dev *ps2dev = &psmouse->ps2dev;
1376         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1377                 return -1;
1378         return 0;
1379 }
1380
1381 /*
1382  * For DualPoint devices select the device that should respond to
1383  * subsequent commands. It looks like glidepad is behind stickpointer,
1384  * I'd thought it would be other way around...
1385  */
1386 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1387 {
1388         struct ps2dev *ps2dev = &psmouse->ps2dev;
1389         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1390
1391         if (ps2_command(ps2dev, NULL, cmd) ||
1392             ps2_command(ps2dev, NULL, cmd) ||
1393             ps2_command(ps2dev, NULL, cmd) ||
1394             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1395                 return -1;
1396
1397         /* we may get 3 more bytes, just ignore them */
1398         ps2_drain(ps2dev, 3, 100);
1399
1400         return 0;
1401 }
1402
1403 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1404 {
1405         struct ps2dev *ps2dev = &psmouse->ps2dev;
1406
1407         /* Try ALPS magic knock - 4 disable before enable */
1408         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1409             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1410             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1411             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1412             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1413                 return -1;
1414
1415         /*
1416          * Switch mouse to poll (remote) mode so motion data will not
1417          * get in our way
1418          */
1419         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1420 }
1421
1422 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1423 {
1424         int i, nibble;
1425
1426         /*
1427          * b0-b11 are valid bits, send sequence is inverse.
1428          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1429          */
1430         for (i = 0; i <= 8; i += 4) {
1431                 nibble = (word >> i) & 0xf;
1432                 if (alps_command_mode_send_nibble(psmouse, nibble))
1433                         return -1;
1434         }
1435
1436         return 0;
1437 }
1438
1439 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1440                                        u16 addr, u16 value)
1441 {
1442         struct ps2dev *ps2dev = &psmouse->ps2dev;
1443
1444         /* 0x0A0 is the command to write the word */
1445         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1446             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1447             alps_monitor_mode_send_word(psmouse, addr) ||
1448             alps_monitor_mode_send_word(psmouse, value) ||
1449             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1450                 return -1;
1451
1452         return 0;
1453 }
1454
1455 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1456 {
1457         struct ps2dev *ps2dev = &psmouse->ps2dev;
1458
1459         if (enable) {
1460                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1461                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1462                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1463                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1464                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1465                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1466                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1467                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1468                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1469                         return -1;
1470         } else {
1471                 /* EC to exit monitor mode */
1472                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1473                         return -1;
1474         }
1475
1476         return 0;
1477 }
1478
1479 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1480 {
1481         u16 reg_val = 0x181;
1482         int ret = -1;
1483
1484         /* enter monitor mode, to write the register */
1485         if (alps_monitor_mode(psmouse, true))
1486                 return -1;
1487
1488         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1489
1490         if (alps_monitor_mode(psmouse, false))
1491                 ret = -1;
1492
1493         return ret;
1494 }
1495
1496 static int alps_get_status(struct psmouse *psmouse, char *param)
1497 {
1498         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1499         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1500                 return -1;
1501
1502         return 0;
1503 }
1504
1505 /*
1506  * Turn touchpad tapping on or off. The sequences are:
1507  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1508  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1509  * My guess that 0xE9 (GetInfo) is here as a sync point.
1510  * For models that also have stickpointer (DualPoints) its tapping
1511  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1512  * we don't fiddle with it.
1513  */
1514 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1515 {
1516         struct ps2dev *ps2dev = &psmouse->ps2dev;
1517         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1518         unsigned char tap_arg = enable ? 0x0A : 0x00;
1519         unsigned char param[4];
1520
1521         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1522             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1523             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1524             ps2_command(ps2dev, &tap_arg, cmd))
1525                 return -1;
1526
1527         if (alps_get_status(psmouse, param))
1528                 return -1;
1529
1530         return 0;
1531 }
1532
1533 /*
1534  * alps_poll() - poll the touchpad for current motion packet.
1535  * Used in resync.
1536  */
1537 static int alps_poll(struct psmouse *psmouse)
1538 {
1539         struct alps_data *priv = psmouse->private;
1540         unsigned char buf[sizeof(psmouse->packet)];
1541         bool poll_failed;
1542
1543         if (priv->flags & ALPS_PASS)
1544                 alps_passthrough_mode_v2(psmouse, true);
1545
1546         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1547                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1548
1549         if (priv->flags & ALPS_PASS)
1550                 alps_passthrough_mode_v2(psmouse, false);
1551
1552         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1553                 return -1;
1554
1555         if ((psmouse->badbyte & 0xc8) == 0x08) {
1556 /*
1557  * Poll the track stick ...
1558  */
1559                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1560                         return -1;
1561         }
1562
1563         memcpy(psmouse->packet, buf, sizeof(buf));
1564         return 0;
1565 }
1566
1567 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1568 {
1569         struct alps_data *priv = psmouse->private;
1570
1571         if ((priv->flags & ALPS_PASS) &&
1572             alps_passthrough_mode_v2(psmouse, true)) {
1573                 return -1;
1574         }
1575
1576         if (alps_tap_mode(psmouse, true)) {
1577                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1578                 return -1;
1579         }
1580
1581         if (alps_absolute_mode_v1_v2(psmouse)) {
1582                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1583                 return -1;
1584         }
1585
1586         if ((priv->flags & ALPS_PASS) &&
1587             alps_passthrough_mode_v2(psmouse, false)) {
1588                 return -1;
1589         }
1590
1591         /* ALPS needs stream mode, otherwise it won't report any data */
1592         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1593                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1594                 return -1;
1595         }
1596
1597         return 0;
1598 }
1599
1600 static int alps_hw_init_v6(struct psmouse *psmouse)
1601 {
1602         unsigned char param[2] = {0xC8, 0x14};
1603
1604         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1605         if (alps_passthrough_mode_v2(psmouse, true))
1606                 return -1;
1607
1608         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1609             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1610             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1611             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1612             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1613                 return -1;
1614
1615         if (alps_passthrough_mode_v2(psmouse, false))
1616                 return -1;
1617
1618         if (alps_absolute_mode_v6(psmouse)) {
1619                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1620                 return -1;
1621         }
1622
1623         return 0;
1624 }
1625
1626 /*
1627  * Enable or disable passthrough mode to the trackstick.
1628  */
1629 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1630                                     int reg_base, bool enable)
1631 {
1632         int reg_val, ret = -1;
1633
1634         if (alps_enter_command_mode(psmouse))
1635                 return -1;
1636
1637         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1638         if (reg_val == -1)
1639                 goto error;
1640
1641         if (enable)
1642                 reg_val |= 0x01;
1643         else
1644                 reg_val &= ~0x01;
1645
1646         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1647
1648 error:
1649         if (alps_exit_command_mode(psmouse))
1650                 ret = -1;
1651         return ret;
1652 }
1653
1654 /* Must be in command mode when calling this function */
1655 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1656 {
1657         int reg_val;
1658
1659         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1660         if (reg_val == -1)
1661                 return -1;
1662
1663         reg_val |= 0x06;
1664         if (__alps_command_mode_write_reg(psmouse, reg_val))
1665                 return -1;
1666
1667         return 0;
1668 }
1669
1670 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
1671 {
1672         int ret = -EIO, reg_val;
1673
1674         if (alps_enter_command_mode(psmouse))
1675                 goto error;
1676
1677         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
1678         if (reg_val == -1)
1679                 goto error;
1680
1681         /* bit 7: trackstick is present */
1682         ret = reg_val & 0x80 ? 0 : -ENODEV;
1683
1684 error:
1685         alps_exit_command_mode(psmouse);
1686         return ret;
1687 }
1688
1689 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
1690 {
1691         struct ps2dev *ps2dev = &psmouse->ps2dev;
1692         int ret = 0;
1693         unsigned char param[4];
1694
1695         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
1696                 return -EIO;
1697
1698         /*
1699          * E7 report for the trackstick
1700          *
1701          * There have been reports of failures to seem to trace back
1702          * to the above trackstick check failing. When these occur
1703          * this E7 report fails, so when that happens we continue
1704          * with the assumption that there isn't a trackstick after
1705          * all.
1706          */
1707         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
1708                 psmouse_warn(psmouse, "trackstick E7 report failed\n");
1709                 ret = -ENODEV;
1710         } else {
1711                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
1712
1713                 /*
1714                  * Not sure what this does, but it is absolutely
1715                  * essential. Without it, the touchpad does not
1716                  * work at all and the trackstick just emits normal
1717                  * PS/2 packets.
1718                  */
1719                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1720                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1721                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1722                     alps_command_mode_send_nibble(psmouse, 0x9) ||
1723                     alps_command_mode_send_nibble(psmouse, 0x4)) {
1724                         psmouse_err(psmouse,
1725                                     "Error sending magic E6 sequence\n");
1726                         ret = -EIO;
1727                         goto error;
1728                 }
1729
1730                 /*
1731                  * This ensures the trackstick packets are in the format
1732                  * supported by this driver. If bit 1 isn't set the packet
1733                  * format is different.
1734                  */
1735                 if (alps_enter_command_mode(psmouse) ||
1736                     alps_command_mode_write_reg(psmouse,
1737                                                 reg_base + 0x08, 0x82) ||
1738                     alps_exit_command_mode(psmouse))
1739                         ret = -EIO;
1740         }
1741
1742 error:
1743         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
1744                 ret = -EIO;
1745
1746         return ret;
1747 }
1748
1749 static int alps_hw_init_v3(struct psmouse *psmouse)
1750 {
1751         struct ps2dev *ps2dev = &psmouse->ps2dev;
1752         int reg_val;
1753         unsigned char param[4];
1754
1755         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
1756         if (reg_val == -EIO)
1757                 goto error;
1758
1759         if (reg_val == 0 &&
1760             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
1761                 goto error;
1762
1763         if (alps_enter_command_mode(psmouse) ||
1764             alps_absolute_mode_v3(psmouse)) {
1765                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1766                 goto error;
1767         }
1768
1769         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1770         if (reg_val == -1)
1771                 goto error;
1772         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1773                 goto error;
1774
1775         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1776         if (reg_val == -1)
1777                 goto error;
1778         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1779                 goto error;
1780
1781         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1782                 goto error;
1783         if (__alps_command_mode_write_reg(psmouse, 0x04))
1784                 goto error;
1785
1786         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1787                 goto error;
1788         if (__alps_command_mode_write_reg(psmouse, 0x03))
1789                 goto error;
1790
1791         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1792                 goto error;
1793         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1794                 goto error;
1795
1796         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1797                 goto error;
1798         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1799                 goto error;
1800
1801         alps_exit_command_mode(psmouse);
1802
1803         /* Set rate and enable data reporting */
1804         param[0] = 0x64;
1805         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1806             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1807                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1808                 return -1;
1809         }
1810
1811         return 0;
1812
1813 error:
1814         /*
1815          * Leaving the touchpad in command mode will essentially render
1816          * it unusable until the machine reboots, so exit it here just
1817          * to be safe
1818          */
1819         alps_exit_command_mode(psmouse);
1820         return -1;
1821 }
1822
1823 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
1824 {
1825         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
1826         struct alps_data *priv = psmouse->private;
1827
1828         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
1829         if (reg < 0)
1830                 return reg;
1831
1832         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1833         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
1834
1835         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
1836         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
1837
1838         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
1839         if (reg < 0)
1840                 return reg;
1841
1842         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
1843         x_electrode = 17 + x_electrode;
1844
1845         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
1846         y_electrode = 13 + y_electrode;
1847
1848         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
1849         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
1850
1851         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
1852         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
1853
1854         psmouse_dbg(psmouse,
1855                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
1856                     x_pitch, y_pitch, x_electrode, y_electrode,
1857                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
1858
1859         return 0;
1860 }
1861
1862 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
1863 {
1864         struct alps_data *priv = psmouse->private;
1865         struct ps2dev *ps2dev = &psmouse->ps2dev;
1866         int reg_val, ret = -1;
1867
1868         if (priv->flags & ALPS_DUALPOINT) {
1869                 reg_val = alps_setup_trackstick_v3(psmouse,
1870                                                    ALPS_REG_BASE_RUSHMORE);
1871                 if (reg_val == -EIO)
1872                         goto error;
1873                 if (reg_val == -ENODEV)
1874                         priv->flags &= ~ALPS_DUALPOINT;
1875         }
1876
1877         if (alps_enter_command_mode(psmouse) ||
1878             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
1879             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
1880                 goto error;
1881
1882         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
1883                 goto error;
1884
1885         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
1886         if (reg_val == -1)
1887                 goto error;
1888         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
1889                 goto error;
1890
1891         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
1892                 goto error;
1893
1894         /* enter absolute mode */
1895         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
1896         if (reg_val == -1)
1897                 goto error;
1898         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
1899                 goto error;
1900
1901         alps_exit_command_mode(psmouse);
1902         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1903
1904 error:
1905         alps_exit_command_mode(psmouse);
1906         return ret;
1907 }
1908
1909 /* Must be in command mode when calling this function */
1910 static int alps_absolute_mode_v4(struct psmouse *psmouse)
1911 {
1912         int reg_val;
1913
1914         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1915         if (reg_val == -1)
1916                 return -1;
1917
1918         reg_val |= 0x02;
1919         if (__alps_command_mode_write_reg(psmouse, reg_val))
1920                 return -1;
1921
1922         return 0;
1923 }
1924
1925 static int alps_hw_init_v4(struct psmouse *psmouse)
1926 {
1927         struct ps2dev *ps2dev = &psmouse->ps2dev;
1928         unsigned char param[4];
1929
1930         if (alps_enter_command_mode(psmouse))
1931                 goto error;
1932
1933         if (alps_absolute_mode_v4(psmouse)) {
1934                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1935                 goto error;
1936         }
1937
1938         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
1939                 goto error;
1940
1941         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
1942                 goto error;
1943
1944         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
1945                 goto error;
1946
1947         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
1948                 goto error;
1949
1950         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
1951                 goto error;
1952
1953         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
1954                 goto error;
1955
1956         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
1957                 goto error;
1958
1959         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
1960                 goto error;
1961
1962         alps_exit_command_mode(psmouse);
1963
1964         /*
1965          * This sequence changes the output from a 9-byte to an
1966          * 8-byte format. All the same data seems to be present,
1967          * just in a more compact format.
1968          */
1969         param[0] = 0xc8;
1970         param[1] = 0x64;
1971         param[2] = 0x50;
1972         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1973             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
1974             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
1975             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1976                 return -1;
1977
1978         /* Set rate and enable data reporting */
1979         param[0] = 0x64;
1980         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1981             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1982                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1983                 return -1;
1984         }
1985
1986         return 0;
1987
1988 error:
1989         /*
1990          * Leaving the touchpad in command mode will essentially render
1991          * it unusable until the machine reboots, so exit it here just
1992          * to be safe
1993          */
1994         alps_exit_command_mode(psmouse);
1995         return -1;
1996 }
1997
1998 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
1999                                         struct alps_data *priv)
2000 {
2001         struct ps2dev *ps2dev = &psmouse->ps2dev;
2002         unsigned char param[4] = {0};
2003         int num_x_electrode, num_y_electrode;
2004
2005         if (alps_enter_command_mode(psmouse))
2006                 return -1;
2007
2008         param[0] = 0x0a;
2009         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2010             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2011             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2012             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2013             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2014                 return -1;
2015
2016         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2017                 return -1;
2018
2019         /*
2020          * Dolphin's sensor line number is not fixed. It can be calculated
2021          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2022          * Further more, we can get device's x_max and y_max by multiplying
2023          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2024          *
2025          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2026          *      real sensor line number X = 11 + 8 = 19, and
2027          *      real sensor line number Y = 8 + 1 = 9.
2028          *      So, x_max = (19 - 1) * 64 = 1152, and
2029          *          y_max = (9 - 1) * 64 = 512.
2030          */
2031         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2032         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2033         priv->x_bits = num_x_electrode;
2034         priv->y_bits = num_y_electrode;
2035         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2036         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2037
2038         if (alps_exit_command_mode(psmouse))
2039                 return -1;
2040
2041         return 0;
2042 }
2043
2044 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2045 {
2046         struct ps2dev *ps2dev = &psmouse->ps2dev;
2047         unsigned char param[2];
2048
2049         /* This is dolphin "v1" as empirically defined by florin9doi */
2050         param[0] = 0x64;
2051         param[1] = 0x28;
2052
2053         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2054             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2055             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2056                 return -1;
2057
2058         return 0;
2059 }
2060
2061 static int alps_hw_init_v7(struct psmouse *psmouse)
2062 {
2063         struct ps2dev *ps2dev = &psmouse->ps2dev;
2064         int reg_val, ret = -1;
2065
2066         if (alps_enter_command_mode(psmouse) ||
2067             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2068                 goto error;
2069
2070         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2071                 goto error;
2072
2073         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2074                 goto error;
2075
2076         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2077         if (reg_val == -1)
2078                 goto error;
2079         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2080                 goto error;
2081
2082         alps_exit_command_mode(psmouse);
2083         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2084
2085 error:
2086         alps_exit_command_mode(psmouse);
2087         return ret;
2088 }
2089
2090 static void alps_set_defaults(struct alps_data *priv)
2091 {
2092         priv->byte0 = 0x8f;
2093         priv->mask0 = 0x8f;
2094         priv->flags = ALPS_DUALPOINT;
2095
2096         priv->x_max = 2000;
2097         priv->y_max = 1400;
2098         priv->x_bits = 15;
2099         priv->y_bits = 11;
2100
2101         switch (priv->proto_version) {
2102         case ALPS_PROTO_V1:
2103         case ALPS_PROTO_V2:
2104                 priv->hw_init = alps_hw_init_v1_v2;
2105                 priv->process_packet = alps_process_packet_v1_v2;
2106                 priv->set_abs_params = alps_set_abs_params_st;
2107                 priv->x_max = 1023;
2108                 priv->y_max = 767;
2109                 break;
2110         case ALPS_PROTO_V3:
2111                 priv->hw_init = alps_hw_init_v3;
2112                 priv->process_packet = alps_process_packet_v3;
2113                 priv->set_abs_params = alps_set_abs_params_mt;
2114                 priv->decode_fields = alps_decode_pinnacle;
2115                 priv->nibble_commands = alps_v3_nibble_commands;
2116                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2117                 break;
2118         case ALPS_PROTO_V4:
2119                 priv->hw_init = alps_hw_init_v4;
2120                 priv->process_packet = alps_process_packet_v4;
2121                 priv->set_abs_params = alps_set_abs_params_mt;
2122                 priv->nibble_commands = alps_v4_nibble_commands;
2123                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2124                 break;
2125         case ALPS_PROTO_V5:
2126                 priv->hw_init = alps_hw_init_dolphin_v1;
2127                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2128                 priv->decode_fields = alps_decode_dolphin;
2129                 priv->set_abs_params = alps_set_abs_params_mt;
2130                 priv->nibble_commands = alps_v3_nibble_commands;
2131                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2132                 priv->byte0 = 0xc8;
2133                 priv->mask0 = 0xd8;
2134                 priv->flags = 0;
2135                 priv->x_max = 1360;
2136                 priv->y_max = 660;
2137                 priv->x_bits = 23;
2138                 priv->y_bits = 12;
2139                 break;
2140         case ALPS_PROTO_V6:
2141                 priv->hw_init = alps_hw_init_v6;
2142                 priv->process_packet = alps_process_packet_v6;
2143                 priv->set_abs_params = alps_set_abs_params_st;
2144                 priv->nibble_commands = alps_v6_nibble_commands;
2145                 priv->x_max = 2047;
2146                 priv->y_max = 1535;
2147                 break;
2148         case ALPS_PROTO_V7:
2149                 priv->hw_init = alps_hw_init_v7;
2150                 priv->process_packet = alps_process_packet_v7;
2151                 priv->decode_fields = alps_decode_packet_v7;
2152                 priv->set_abs_params = alps_set_abs_params_mt;
2153                 priv->nibble_commands = alps_v3_nibble_commands;
2154                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2155                 priv->x_max = 0xfff;
2156                 priv->y_max = 0x7ff;
2157                 priv->byte0 = 0x48;
2158                 priv->mask0 = 0x48;
2159
2160                 if (priv->fw_ver[1] != 0xba)
2161                         priv->flags |= ALPS_BUTTONPAD;
2162                 break;
2163         }
2164 }
2165
2166 static int alps_match_table(struct psmouse *psmouse, struct alps_data *priv,
2167                             unsigned char *e7, unsigned char *ec)
2168 {
2169         const struct alps_model_info *model;
2170         int i;
2171
2172         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2173                 model = &alps_model_data[i];
2174
2175                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2176                     (!model->command_mode_resp ||
2177                      model->command_mode_resp == ec[2])) {
2178
2179                         priv->proto_version = model->proto_version;
2180                         alps_set_defaults(priv);
2181
2182                         priv->flags = model->flags;
2183                         priv->byte0 = model->byte0;
2184                         priv->mask0 = model->mask0;
2185
2186                         return 0;
2187                 }
2188         }
2189
2190         return -EINVAL;
2191 }
2192
2193 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2194 {
2195         unsigned char e6[4], e7[4], ec[4];
2196
2197         /*
2198          * First try "E6 report".
2199          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2200          * The bits 0-2 of the first byte will be 1s if some buttons are
2201          * pressed.
2202          */
2203         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2204                          PSMOUSE_CMD_SETSCALE11, e6))
2205                 return -EIO;
2206
2207         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2208                 return -EINVAL;
2209
2210         /*
2211          * Now get the "E7" and "EC" reports.  These will uniquely identify
2212          * most ALPS touchpads.
2213          */
2214         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2215                          PSMOUSE_CMD_SETSCALE21, e7) ||
2216             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2217                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2218             alps_exit_command_mode(psmouse))
2219                 return -EIO;
2220
2221         /* Save the Firmware version */
2222         memcpy(priv->fw_ver, ec, 3);
2223
2224         if (alps_match_table(psmouse, priv, e7, ec) == 0) {
2225                 return 0;
2226         } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2227                    ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2228                 priv->proto_version = ALPS_PROTO_V5;
2229                 alps_set_defaults(priv);
2230                 if (alps_dolphin_get_device_area(psmouse, priv))
2231                         return -EIO;
2232                 else
2233                         return 0;
2234         } else if (ec[0] == 0x88 &&
2235                    ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2236                 priv->proto_version = ALPS_PROTO_V7;
2237                 alps_set_defaults(priv);
2238
2239                 return 0;
2240         } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2241                 priv->proto_version = ALPS_PROTO_V3;
2242                 alps_set_defaults(priv);
2243
2244                 priv->hw_init = alps_hw_init_rushmore_v3;
2245                 priv->decode_fields = alps_decode_rushmore;
2246                 priv->x_bits = 16;
2247                 priv->y_bits = 12;
2248                 priv->flags |= ALPS_IS_RUSHMORE;
2249
2250                 /* hack to make addr_command, nibble_command available */
2251                 psmouse->private = priv;
2252
2253                 if (alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_RUSHMORE))
2254                         priv->flags &= ~ALPS_DUALPOINT;
2255
2256                 return 0;
2257         } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2258                    ec[2] >= 0x90 && ec[2] <= 0x9d) {
2259                 priv->proto_version = ALPS_PROTO_V3;
2260                 alps_set_defaults(priv);
2261
2262                 return 0;
2263         }
2264
2265         psmouse_dbg(psmouse,
2266                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2267
2268         return -EINVAL;
2269 }
2270
2271 static int alps_reconnect(struct psmouse *psmouse)
2272 {
2273         struct alps_data *priv = psmouse->private;
2274
2275         psmouse_reset(psmouse);
2276
2277         if (alps_identify(psmouse, priv) < 0)
2278                 return -1;
2279
2280         return priv->hw_init(psmouse);
2281 }
2282
2283 static void alps_disconnect(struct psmouse *psmouse)
2284 {
2285         struct alps_data *priv = psmouse->private;
2286
2287         psmouse_reset(psmouse);
2288         del_timer_sync(&priv->timer);
2289         input_unregister_device(priv->dev2);
2290         kfree(priv);
2291 }
2292
2293 static void alps_set_abs_params_st(struct alps_data *priv,
2294                                    struct input_dev *dev1)
2295 {
2296         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2297         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2298 }
2299
2300 static void alps_set_abs_params_mt(struct alps_data *priv,
2301                                    struct input_dev *dev1)
2302 {
2303         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2304         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2305
2306         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2307         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2308
2309         input_mt_init_slots(dev1, MAX_TOUCHES, INPUT_MT_POINTER |
2310                 INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2311
2312         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2313         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2314
2315         /* V7 is real multi-touch */
2316         if (priv->proto_version == ALPS_PROTO_V7)
2317                 clear_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
2318 }
2319
2320 int alps_init(struct psmouse *psmouse)
2321 {
2322         struct alps_data *priv;
2323         struct input_dev *dev1 = psmouse->dev, *dev2;
2324
2325         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2326         dev2 = input_allocate_device();
2327         if (!priv || !dev2)
2328                 goto init_fail;
2329
2330         priv->dev2 = dev2;
2331         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2332
2333         psmouse->private = priv;
2334
2335         psmouse_reset(psmouse);
2336
2337         if (alps_identify(psmouse, priv) < 0)
2338                 goto init_fail;
2339
2340         if (priv->hw_init(psmouse))
2341                 goto init_fail;
2342
2343         /*
2344          * Undo part of setup done for us by psmouse core since touchpad
2345          * is not a relative device.
2346          */
2347         __clear_bit(EV_REL, dev1->evbit);
2348         __clear_bit(REL_X, dev1->relbit);
2349         __clear_bit(REL_Y, dev1->relbit);
2350
2351         /*
2352          * Now set up our capabilities.
2353          */
2354         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2355         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2356         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2357         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2358                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2359
2360         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2361
2362         priv->set_abs_params(priv, dev1);
2363         /* No pressure on V7 */
2364         if (priv->proto_version != ALPS_PROTO_V7)
2365                 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2366
2367         if (priv->flags & ALPS_WHEEL) {
2368                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2369                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2370         }
2371
2372         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2373                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2374                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2375         }
2376
2377         if (priv->flags & ALPS_FOUR_BUTTONS) {
2378                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2379                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2380                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2381                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2382         } else if (priv->flags & ALPS_BUTTONPAD) {
2383                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2384                 clear_bit(BTN_RIGHT, dev1->keybit);
2385         } else {
2386                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2387         }
2388
2389         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
2390         dev2->phys = priv->phys;
2391         dev2->name = (priv->flags & ALPS_DUALPOINT) ?
2392                      "DualPoint Stick" : "ALPS PS/2 Device";
2393         dev2->id.bustype = BUS_I8042;
2394         dev2->id.vendor  = 0x0002;
2395         dev2->id.product = PSMOUSE_ALPS;
2396         dev2->id.version = 0x0000;
2397         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2398
2399         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
2400         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
2401         dev2->keybit[BIT_WORD(BTN_LEFT)] =
2402                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
2403
2404         __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2405         if (priv->flags & ALPS_DUALPOINT)
2406                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2407
2408         if (input_register_device(priv->dev2))
2409                 goto init_fail;
2410
2411         psmouse->protocol_handler = alps_process_byte;
2412         psmouse->poll = alps_poll;
2413         psmouse->disconnect = alps_disconnect;
2414         psmouse->reconnect = alps_reconnect;
2415         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2416
2417         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2418         psmouse->resync_time = 0;
2419
2420         return 0;
2421
2422 init_fail:
2423         psmouse_reset(psmouse);
2424         input_free_device(dev2);
2425         kfree(priv);
2426         psmouse->private = NULL;
2427         return -1;
2428 }
2429
2430 int alps_detect(struct psmouse *psmouse, bool set_properties)
2431 {
2432         struct alps_data dummy;
2433
2434         if (alps_identify(psmouse, &dummy) < 0)
2435                 return -1;
2436
2437         if (set_properties) {
2438                 psmouse->vendor = "ALPS";
2439                 psmouse->name = dummy.flags & ALPS_DUALPOINT ?
2440                                 "DualPoint TouchPad" : "GlidePoint";
2441                 psmouse->model = dummy.proto_version << 8;
2442         }
2443         return 0;
2444 }
2445