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
 103 static const struct alps_model_info alps_model_data[] = {
 104         { { 0x32, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },  /* Toshiba Salellite Pro M10 */
 105         { { 0x33, 0x02, 0x0a }, 0x00, ALPS_PROTO_V1, 0x88, 0xf8, 0 },                           /* UMAX-530T */
 106         { { 0x53, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 107         { { 0x53, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 108         { { 0x60, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },                           /* HP ze1115 */
 109         { { 0x63, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 110         { { 0x63, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 111         { { 0x63, 0x02, 0x28 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 },                /* Fujitsu Siemens S6010 */
 112         { { 0x63, 0x02, 0x3c }, 0x00, ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL },                  /* Toshiba Satellite S2400-103 */
 113         { { 0x63, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 },                /* NEC Versa L320 */
 114         { { 0x63, 0x02, 0x64 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 115         { { 0x63, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },  /* Dell Latitude D800 */
 116         { { 0x73, 0x00, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT },              /* ThinkPad R61 8918-5QG */
 117         { { 0x73, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
 118         { { 0x73, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 },                /* Ahtec Laptop */
 119         { { 0x20, 0x02, 0x0e }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },  /* XXX */
 120         { { 0x22, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
 121         { { 0x22, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT },  /* Dell Latitude D600 */
 122         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
 123         { { 0x62, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf,
 124                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
 125         { { 0x73, 0x00, 0x14 }, 0x00, ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT },              /* Dell XT2 */
 126         { { 0x73, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS },           /* Dell Vostro 1400 */
 127         { { 0x52, 0x01, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff,
 128                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },                            /* Toshiba Tecra A11-11L */
 129         { { 0x73, 0x02, 0x64 }, 0x8a, ALPS_PROTO_V4, 0x8f, 0x8f, 0 },
 130 };
 131
 132 static void alps_set_abs_params_st(struct alps_data *priv,
 133                                    struct input_dev *dev1);
 134 static void alps_set_abs_params_mt(struct alps_data *priv,
 135                                    struct input_dev *dev1);
 136
 137 /*
 138  * XXX - this entry is suspicious. First byte has zero lower nibble,
 139  * which is what a normal mouse would report. Also, the value 0x0e
 140  * isn't valid per PS/2 spec.
 141  */
 142
 143 /* Packet formats are described in Documentation/input/alps.txt */
 144
 145 static bool alps_is_valid_first_byte(struct alps_data *priv,
 146                                      unsigned char data)
 147 {
 148         return (data & priv->mask0) == priv->byte0;
 149 }
 150
 151 static void alps_report_buttons(struct psmouse *psmouse,
 152                                 struct input_dev *dev1, struct input_dev *dev2,
 153                                 int left, int right, int middle)
 154 {
 155         struct input_dev *dev;
 156
 157         /*
 158          * If shared button has already been reported on the
 159          * other device (dev2) then this event should be also
 160          * sent through that device.
 161          */
 162         dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
 163         input_report_key(dev, BTN_LEFT, left);
 164
 165         dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
 166         input_report_key(dev, BTN_RIGHT, right);
 167
 168         dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
 169         input_report_key(dev, BTN_MIDDLE, middle);
 170
 171         /*
 172          * Sync the _other_ device now, we'll do the first
 173          * device later once we report the rest of the events.
 174          */
 175         input_sync(dev2);
 176 }
 177
 178 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
 179 {
 180         struct alps_data *priv = psmouse->private;
 181         unsigned char *packet = psmouse->packet;
 182         struct input_dev *dev = psmouse->dev;
 183         struct input_dev *dev2 = priv->dev2;
 184         int x, y, z, ges, fin, left, right, middle;
 185         int back = 0, forward = 0;
 186
 187         if (priv->proto_version == ALPS_PROTO_V1) {
 188                 left = packet[2] & 0x10;
 189                 right = packet[2] & 0x08;
 190                 middle = 0;
 191                 x = packet[1] | ((packet[0] & 0x07) << 7);
 192                 y = packet[4] | ((packet[3] & 0x07) << 7);
 193                 z = packet[5];
 194         } else {
 195                 left = packet[3] & 1;
 196                 right = packet[3] & 2;
 197                 middle = packet[3] & 4;
 198                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 199                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 200                 z = packet[5];
 201         }
 202
 203         if (priv->flags & ALPS_FW_BK_1) {
 204                 back = packet[0] & 0x10;
 205                 forward = packet[2] & 4;
 206         }
 207
 208         if (priv->flags & ALPS_FW_BK_2) {
 209                 back = packet[3] & 4;
 210                 forward = packet[2] & 4;
 211                 if ((middle = forward && back))
 212                         forward = back = 0;
 213         }
 214
 215         ges = packet[2] & 1;
 216         fin = packet[2] & 2;
 217
 218         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
 219                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 220                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 221
 222                 alps_report_buttons(psmouse, dev2, dev, left, right, middle);
 223
 224                 input_sync(dev2);
 225                 return;
 226         }
 227
 228         alps_report_buttons(psmouse, dev, dev2, left, right, middle);
 229
 230         /* Convert hardware tap to a reasonable Z value */
 231         if (ges && !fin)
 232                 z = 40;
 233
 234         /*
 235          * A "tap and drag" operation is reported by the hardware as a transition
 236          * from (!fin && ges) to (fin && ges). This should be translated to the
 237          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 238          */
 239         if (ges && fin && !priv->prev_fin) {
 240                 input_report_abs(dev, ABS_X, x);
 241                 input_report_abs(dev, ABS_Y, y);
 242                 input_report_abs(dev, ABS_PRESSURE, 0);
 243                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 244                 input_sync(dev);
 245         }
 246         priv->prev_fin = fin;
 247
 248         if (z > 30)
 249                 input_report_key(dev, BTN_TOUCH, 1);
 250         if (z < 25)
 251                 input_report_key(dev, BTN_TOUCH, 0);
 252
 253         if (z > 0) {
 254                 input_report_abs(dev, ABS_X, x);
 255                 input_report_abs(dev, ABS_Y, y);
 256         }
 257
 258         input_report_abs(dev, ABS_PRESSURE, z);
 259         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 260
 261         if (priv->flags & ALPS_WHEEL)
 262                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 263
 264         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 265                 input_report_key(dev, BTN_FORWARD, forward);
 266                 input_report_key(dev, BTN_BACK, back);
 267         }
 268
 269         if (priv->flags & ALPS_FOUR_BUTTONS) {
 270                 input_report_key(dev, BTN_0, packet[2] & 4);
 271                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 272                 input_report_key(dev, BTN_2, packet[3] & 4);
 273                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 274         }
 275
 276         input_sync(dev);
 277 }
 278
 279 /*
 280  * Process bitmap data from v3 and v4 protocols. Returns the number of
 281  * fingers detected. A return value of 0 means at least one of the
 282  * bitmaps was empty.
 283  *
 284  * The bitmaps don't have enough data to track fingers, so this function
 285  * only generates points representing a bounding box of all contacts.
 286  * These points are returned in x1, y1, x2, and y2 when the return value
 287  * is greater than 0.
 288  */
 289 static int alps_process_bitmap(struct alps_data *priv,
 290                                unsigned int x_map, unsigned int y_map,
 291                                int *x1, int *y1, int *x2, int *y2)
 292 {
 293         struct alps_bitmap_point {
 294                 int start_bit;
 295                 int num_bits;
 296         };
 297
 298         int fingers_x = 0, fingers_y = 0, fingers;
 299         int i, bit, prev_bit;
 300         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 301         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 302         struct alps_bitmap_point *point;
 303
 304         if (!x_map || !y_map)
 305                 return 0;
 306
 307         *x1 = *y1 = *x2 = *y2 = 0;
 308
 309         prev_bit = 0;
 310         point = &x_low;
 311         for (i = 0; x_map != 0; i++, x_map >>= 1) {
 312                 bit = x_map & 1;
 313                 if (bit) {
 314                         if (!prev_bit) {
 315                                 point->start_bit = i;
 316                                 fingers_x++;
 317                         }
 318                         point->num_bits++;
 319                 } else {
 320                         if (prev_bit)
 321                                 point = &x_high;
 322                         else
 323                                 point->num_bits = 0;
 324                 }
 325                 prev_bit = bit;
 326         }
 327
 328         /*
 329          * y bitmap is reversed for what we need (lower positions are in
 330          * higher bits), so we process from the top end.
 331          */
 332         y_map = y_map << (sizeof(y_map) * BITS_PER_BYTE - priv->y_bits);
 333         prev_bit = 0;
 334         point = &y_low;
 335         for (i = 0; y_map != 0; i++, y_map <<= 1) {
 336                 bit = y_map & (1 << (sizeof(y_map) * BITS_PER_BYTE - 1));
 337                 if (bit) {
 338                         if (!prev_bit) {
 339                                 point->start_bit = i;
 340                                 fingers_y++;
 341                         }
 342                         point->num_bits++;
 343                 } else {
 344                         if (prev_bit)
 345                                 point = &y_high;
 346                         else
 347                                 point->num_bits = 0;
 348                 }
 349                 prev_bit = bit;
 350         }
 351
 352         /*
 353          * Fingers can overlap, so we use the maximum count of fingers
 354          * on either axis as the finger count.
 355          */
 356         fingers = max(fingers_x, fingers_y);
 357
 358         /*
 359          * If total fingers is > 1 but either axis reports only a single
 360          * contact, we have overlapping or adjacent fingers. For the
 361          * purposes of creating a bounding box, divide the single contact
 362          * (roughly) equally between the two points.
 363          */
 364         if (fingers > 1) {
 365                 if (fingers_x == 1) {
 366                         i = x_low.num_bits / 2;
 367                         x_low.num_bits = x_low.num_bits - i;
 368                         x_high.start_bit = x_low.start_bit + i;
 369                         x_high.num_bits = max(i, 1);
 370                 } else if (fingers_y == 1) {
 371                         i = y_low.num_bits / 2;
 372                         y_low.num_bits = y_low.num_bits - i;
 373                         y_high.start_bit = y_low.start_bit + i;
 374                         y_high.num_bits = max(i, 1);
 375                 }
 376         }
 377
 378         *x1 = (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 379               (2 * (priv->x_bits - 1));
 380         *y1 = (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 381               (2 * (priv->y_bits - 1));
 382
 383         if (fingers > 1) {
 384                 *x2 = (priv->x_max *
 385                        (2 * x_high.start_bit + x_high.num_bits - 1)) /
 386                       (2 * (priv->x_bits - 1));
 387                 *y2 = (priv->y_max *
 388                        (2 * y_high.start_bit + y_high.num_bits - 1)) /
 389                       (2 * (priv->y_bits - 1));
 390         }
 391
 392         return fingers;
 393 }
 394
 395 static void alps_set_slot(struct input_dev *dev, int slot, bool active,
 396                           int x, int y)
 397 {
 398         input_mt_slot(dev, slot);
 399         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 400         if (active) {
 401                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 402                 input_report_abs(dev, ABS_MT_POSITION_Y, y);
 403         }
 404 }
 405
 406 static void alps_report_semi_mt_data(struct input_dev *dev, int num_fingers,
 407                                      int x1, int y1, int x2, int y2)
 408 {
 409         alps_set_slot(dev, 0, num_fingers != 0, x1, y1);
 410         alps_set_slot(dev, 1, num_fingers == 2, x2, y2);
 411 }
 412
 413 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 414 {
 415         struct alps_data *priv = psmouse->private;
 416         unsigned char *packet = psmouse->packet;
 417         struct input_dev *dev = priv->dev2;
 418         int x, y, z, left, right, middle;
 419
 420         /* Sanity check packet */
 421         if (!(packet[0] & 0x40)) {
 422                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 423                 return;
 424         }
 425
 426         /*
 427          * There's a special packet that seems to indicate the end
 428          * of a stream of trackstick data. Filter these out.
 429          */
 430         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 431                 return;
 432
 433         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 434         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 435         z = (packet[4] & 0x7c) >> 2;
 436
 437         /*
 438          * The x and y values tend to be quite large, and when used
 439          * alone the trackstick is difficult to use. Scale them down
 440          * to compensate.
 441          */
 442         x /= 8;
 443         y /= 8;
 444
 445         input_report_rel(dev, REL_X, x);
 446         input_report_rel(dev, REL_Y, -y);
 447
 448         /*
 449          * Most ALPS models report the trackstick buttons in the touchpad
 450          * packets, but a few report them here. No reliable way has been
 451          * found to differentiate between the models upfront, so we enable
 452          * the quirk in response to seeing a button press in the trackstick
 453          * packet.
 454          */
 455         left = packet[3] & 0x01;
 456         right = packet[3] & 0x02;
 457         middle = packet[3] & 0x04;
 458
 459         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 460             (left || right || middle))
 461                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 462
 463         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 464                 input_report_key(dev, BTN_LEFT, left);
 465                 input_report_key(dev, BTN_RIGHT, right);
 466                 input_report_key(dev, BTN_MIDDLE, middle);
 467         }
 468
 469         input_sync(dev);
 470         return;
 471 }
 472
 473 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 474 {
 475         f->left = !!(p[3] & 0x01);
 476         f->right = !!(p[3] & 0x02);
 477         f->middle = !!(p[3] & 0x04);
 478
 479         f->ts_left = !!(p[3] & 0x10);
 480         f->ts_right = !!(p[3] & 0x20);
 481         f->ts_middle = !!(p[3] & 0x40);
 482 }
 483
 484 static void alps_decode_pinnacle(struct alps_fields *f, unsigned char *p)
 485 {
 486         f->first_mp = !!(p[4] & 0x40);
 487         f->is_mp = !!(p[0] & 0x40);
 488
 489         f->fingers = (p[5] & 0x3) + 1;
 490         f->x_map = ((p[4] & 0x7e) << 8) |
 491                    ((p[1] & 0x7f) << 2) |
 492                    ((p[0] & 0x30) >> 4);
 493         f->y_map = ((p[3] & 0x70) << 4) |
 494                    ((p[2] & 0x7f) << 1) |
 495                    (p[4] & 0x01);
 496
 497         f->x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 498                ((p[0] & 0x30) >> 4);
 499         f->y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 500         f->z = p[5] & 0x7f;
 501
 502         alps_decode_buttons_v3(f, p);
 503 }
 504
 505 static void alps_decode_rushmore(struct alps_fields *f, unsigned char *p)
 506 {
 507         alps_decode_pinnacle(f, p);
 508
 509         f->x_map |= (p[5] & 0x10) << 11;
 510         f->y_map |= (p[5] & 0x20) << 6;
 511 }
 512
 513 static void alps_decode_dolphin(struct alps_fields *f, unsigned char *p)
 514 {
 515         f->first_mp = !!(p[0] & 0x02);
 516         f->is_mp = !!(p[0] & 0x20);
 517
 518         f->fingers = ((p[0] & 0x6) >> 1 |
 519                      (p[0] & 0x10) >> 2);
 520         f->x_map = ((p[2] & 0x60) >> 5) |
 521                    ((p[4] & 0x7f) << 2) |
 522                    ((p[5] & 0x7f) << 9) |
 523                    ((p[3] & 0x07) << 16) |
 524                    ((p[3] & 0x70) << 15) |
 525                    ((p[0] & 0x01) << 22);
 526         f->y_map = (p[1] & 0x7f) |
 527                    ((p[2] & 0x1f) << 7);
 528
 529         f->x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 530         f->y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 531         f->z = (p[0] & 4) ? 0 : p[5] & 0x7f;
 532
 533         alps_decode_buttons_v3(f, p);
 534 }
 535
 536 static void alps_process_touchpad_packet_v3(struct psmouse *psmouse)
 537 {
 538         struct alps_data *priv = psmouse->private;
 539         unsigned char *packet = psmouse->packet;
 540         struct input_dev *dev = psmouse->dev;
 541         struct input_dev *dev2 = priv->dev2;
 542         int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
 543         int fingers = 0, bmap_fingers;
 544         struct alps_fields f;
 545
 546         priv->decode_fields(&f, packet);
 547
 548         /*
 549          * There's no single feature of touchpad position and bitmap packets
 550          * that can be used to distinguish between them. We rely on the fact
 551          * that a bitmap packet should always follow a position packet with
 552          * bit 6 of packet[4] set.
 553          */
 554         if (priv->multi_packet) {
 555                 /*
 556                  * Sometimes a position packet will indicate a multi-packet
 557                  * sequence, but then what follows is another position
 558                  * packet. Check for this, and when it happens process the
 559                  * position packet as usual.
 560                  */
 561                 if (f.is_mp) {
 562                         fingers = f.fingers;
 563                         bmap_fingers = alps_process_bitmap(priv,
 564                                                            f.x_map, f.y_map,
 565                                                            &x1, &y1, &x2, &y2);
 566
 567                         /*
 568                          * We shouldn't report more than one finger if
 569                          * we don't have two coordinates.
 570                          */
 571                         if (fingers > 1 && bmap_fingers < 2)
 572                                 fingers = bmap_fingers;
 573
 574                         /* Now process position packet */
 575                         priv->decode_fields(&f, priv->multi_data);
 576                 } else {
 577                         priv->multi_packet = 0;
 578                 }
 579         }
 580
 581         /*
 582          * Bit 6 of byte 0 is not usually set in position packets. The only
 583          * times it seems to be set is in situations where the data is
 584          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 585          * this combined with the fact that this bit is useful for filtering
 586          * out misidentified bitmap packets, we reject anything with this
 587          * bit set.
 588          */
 589         if (f.is_mp)
 590                 return;
 591
 592         if (!priv->multi_packet && f.first_mp) {
 593                 priv->multi_packet = 1;
 594                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 595                 return;
 596         }
 597
 598         priv->multi_packet = 0;
 599
 600         /*
 601          * Sometimes the hardware sends a single packet with z = 0
 602          * in the middle of a stream. Real releases generate packets
 603          * with x, y, and z all zero, so these seem to be flukes.
 604          * Ignore them.
 605          */
 606         if (f.x && f.y && !f.z)
 607                 return;
 608
 609         /*
 610          * If we don't have MT data or the bitmaps were empty, we have
 611          * to rely on ST data.
 612          */
 613         if (!fingers) {
 614                 x1 = f.x;
 615                 y1 = f.y;
 616                 fingers = f.z > 0 ? 1 : 0;
 617         }
 618
 619         if (f.z >= 64)
 620                 input_report_key(dev, BTN_TOUCH, 1);
 621         else
 622                 input_report_key(dev, BTN_TOUCH, 0);
 623
 624         alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
 625
 626         input_mt_report_finger_count(dev, fingers);
 627
 628         input_report_key(dev, BTN_LEFT, f.left);
 629         input_report_key(dev, BTN_RIGHT, f.right);
 630         input_report_key(dev, BTN_MIDDLE, f.middle);
 631
 632         if (f.z > 0) {
 633                 input_report_abs(dev, ABS_X, f.x);
 634                 input_report_abs(dev, ABS_Y, f.y);
 635         }
 636         input_report_abs(dev, ABS_PRESSURE, f.z);
 637
 638         input_sync(dev);
 639
 640         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 641                 input_report_key(dev2, BTN_LEFT, f.ts_left);
 642                 input_report_key(dev2, BTN_RIGHT, f.ts_right);
 643                 input_report_key(dev2, BTN_MIDDLE, f.ts_middle);
 644                 input_sync(dev2);
 645         }
 646 }
 647
 648 static void alps_process_packet_v3(struct psmouse *psmouse)
 649 {
 650         unsigned char *packet = psmouse->packet;
 651
 652         /*
 653          * v3 protocol packets come in three types, two representing
 654          * touchpad data and one representing trackstick data.
 655          * Trackstick packets seem to be distinguished by always
 656          * having 0x3f in the last byte. This value has never been
 657          * observed in the last byte of either of the other types
 658          * of packets.
 659          */
 660         if (packet[5] == 0x3f) {
 661                 alps_process_trackstick_packet_v3(psmouse);
 662                 return;
 663         }
 664
 665         alps_process_touchpad_packet_v3(psmouse);
 666 }
 667
 668 static void alps_process_packet_v6(struct psmouse *psmouse)
 669 {
 670         struct alps_data *priv = psmouse->private;
 671         unsigned char *packet = psmouse->packet;
 672         struct input_dev *dev = psmouse->dev;
 673         struct input_dev *dev2 = priv->dev2;
 674         int x, y, z, left, right, middle;
 675
 676         /*
 677          * We can use Byte5 to distinguish if the packet is from Touchpad
 678          * or Trackpoint.
 679          * Touchpad:    0 - 0x7E
 680          * Trackpoint:  0x7F
 681          */
 682         if (packet[5] == 0x7F) {
 683                 /* It should be a DualPoint when received Trackpoint packet */
 684                 if (!(priv->flags & ALPS_DUALPOINT))
 685                         return;
 686
 687                 /* Trackpoint packet */
 688                 x = packet[1] | ((packet[3] & 0x20) << 2);
 689                 y = packet[2] | ((packet[3] & 0x40) << 1);
 690                 z = packet[4];
 691                 left = packet[3] & 0x01;
 692                 right = packet[3] & 0x02;
 693                 middle = packet[3] & 0x04;
 694
 695                 /* To prevent the cursor jump when finger lifted */
 696                 if (x == 0x7F && y == 0x7F && z == 0x7F)
 697                         x = y = z = 0;
 698
 699                 /* Divide 4 since trackpoint's speed is too fast */
 700                 input_report_rel(dev2, REL_X, (char)x / 4);
 701                 input_report_rel(dev2, REL_Y, -((char)y / 4));
 702
 703                 input_report_key(dev2, BTN_LEFT, left);
 704                 input_report_key(dev2, BTN_RIGHT, right);
 705                 input_report_key(dev2, BTN_MIDDLE, middle);
 706
 707                 input_sync(dev2);
 708                 return;
 709         }
 710
 711         /* Touchpad packet */
 712         x = packet[1] | ((packet[3] & 0x78) << 4);
 713         y = packet[2] | ((packet[4] & 0x78) << 4);
 714         z = packet[5];
 715         left = packet[3] & 0x01;
 716         right = packet[3] & 0x02;
 717
 718         if (z > 30)
 719                 input_report_key(dev, BTN_TOUCH, 1);
 720         if (z < 25)
 721                 input_report_key(dev, BTN_TOUCH, 0);
 722
 723         if (z > 0) {
 724                 input_report_abs(dev, ABS_X, x);
 725                 input_report_abs(dev, ABS_Y, y);
 726         }
 727
 728         input_report_abs(dev, ABS_PRESSURE, z);
 729         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 730
 731         /* v6 touchpad does not have middle button */
 732         input_report_key(dev, BTN_LEFT, left);
 733         input_report_key(dev, BTN_RIGHT, right);
 734
 735         input_sync(dev);
 736 }
 737
 738 static void alps_process_packet_v4(struct psmouse *psmouse)
 739 {
 740         struct alps_data *priv = psmouse->private;
 741         unsigned char *packet = psmouse->packet;
 742         struct input_dev *dev = psmouse->dev;
 743         int offset;
 744         int x, y, z;
 745         int left, right;
 746         int x1, y1, x2, y2;
 747         int fingers = 0;
 748         unsigned int x_bitmap, y_bitmap;
 749
 750         /*
 751          * v4 has a 6-byte encoding for bitmap data, but this data is
 752          * broken up between 3 normal packets. Use priv->multi_packet to
 753          * track our position in the bitmap packet.
 754          */
 755         if (packet[6] & 0x40) {
 756                 /* sync, reset position */
 757                 priv->multi_packet = 0;
 758         }
 759
 760         if (WARN_ON_ONCE(priv->multi_packet > 2))
 761                 return;
 762
 763         offset = 2 * priv->multi_packet;
 764         priv->multi_data[offset] = packet[6];
 765         priv->multi_data[offset + 1] = packet[7];
 766
 767         if (++priv->multi_packet > 2) {
 768                 priv->multi_packet = 0;
 769
 770                 x_bitmap = ((priv->multi_data[2] & 0x1f) << 10) |
 771                            ((priv->multi_data[3] & 0x60) << 3) |
 772                            ((priv->multi_data[0] & 0x3f) << 2) |
 773                            ((priv->multi_data[1] & 0x60) >> 5);
 774                 y_bitmap = ((priv->multi_data[5] & 0x01) << 10) |
 775                            ((priv->multi_data[3] & 0x1f) << 5) |
 776                             (priv->multi_data[1] & 0x1f);
 777
 778                 fingers = alps_process_bitmap(priv, x_bitmap, y_bitmap,
 779                                               &x1, &y1, &x2, &y2);
 780
 781                 /* Store MT data.*/
 782                 priv->fingers = fingers;
 783                 priv->x1 = x1;
 784                 priv->x2 = x2;
 785                 priv->y1 = y1;
 786                 priv->y2 = y2;
 787         }
 788
 789         left = packet[4] & 0x01;
 790         right = packet[4] & 0x02;
 791
 792         x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 793             ((packet[0] & 0x30) >> 4);
 794         y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 795         z = packet[5] & 0x7f;
 796
 797         /*
 798          * If there were no contacts in the bitmap, use ST
 799          * points in MT reports.
 800          * If there were two contacts or more, report MT data.
 801          */
 802         if (priv->fingers < 2) {
 803                 x1 = x;
 804                 y1 = y;
 805                 fingers = z > 0 ? 1 : 0;
 806         } else {
 807                 fingers = priv->fingers;
 808                 x1 = priv->x1;
 809                 x2 = priv->x2;
 810                 y1 = priv->y1;
 811                 y2 = priv->y2;
 812         }
 813
 814         if (z >= 64)
 815                 input_report_key(dev, BTN_TOUCH, 1);
 816         else
 817                 input_report_key(dev, BTN_TOUCH, 0);
 818
 819         alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
 820
 821         input_mt_report_finger_count(dev, fingers);
 822
 823         input_report_key(dev, BTN_LEFT, left);
 824         input_report_key(dev, BTN_RIGHT, right);
 825
 826         if (z > 0) {
 827                 input_report_abs(dev, ABS_X, x);
 828                 input_report_abs(dev, ABS_Y, y);
 829         }
 830         input_report_abs(dev, ABS_PRESSURE, z);
 831
 832         input_sync(dev);
 833 }
 834
 835 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 836                                         unsigned char packet[],
 837                                         bool report_buttons)
 838 {
 839         struct alps_data *priv = psmouse->private;
 840         struct input_dev *dev2 = priv->dev2;
 841
 842         if (report_buttons)
 843                 alps_report_buttons(psmouse, dev2, psmouse->dev,
 844                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
 845
 846         input_report_rel(dev2, REL_X,
 847                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
 848         input_report_rel(dev2, REL_Y,
 849                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
 850
 851         input_sync(dev2);
 852 }
 853
 854 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 855 {
 856         struct alps_data *priv = psmouse->private;
 857
 858         if (psmouse->pktcnt < 6)
 859                 return PSMOUSE_GOOD_DATA;
 860
 861         if (psmouse->pktcnt == 6) {
 862                 /*
 863                  * Start a timer to flush the packet if it ends up last
 864                  * 6-byte packet in the stream. Timer needs to fire
 865                  * psmouse core times out itself. 20 ms should be enough
 866                  * to decide if we are getting more data or not.
 867                  */
 868                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
 869                 return PSMOUSE_GOOD_DATA;
 870         }
 871
 872         del_timer(&priv->timer);
 873
 874         if (psmouse->packet[6] & 0x80) {
 875
 876                 /*
 877                  * Highest bit is set - that means we either had
 878                  * complete ALPS packet and this is start of the
 879                  * next packet or we got garbage.
 880                  */
 881
 882                 if (((psmouse->packet[3] |
 883                       psmouse->packet[4] |
 884                       psmouse->packet[5]) & 0x80) ||
 885                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
 886                         psmouse_dbg(psmouse,
 887                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
 888                                     psmouse->packet + 3);
 889                         return PSMOUSE_BAD_DATA;
 890                 }
 891
 892                 priv->process_packet(psmouse);
 893
 894                 /* Continue with the next packet */
 895                 psmouse->packet[0] = psmouse->packet[6];
 896                 psmouse->pktcnt = 1;
 897
 898         } else {
 899
 900                 /*
 901                  * High bit is 0 - that means that we indeed got a PS/2
 902                  * packet in the middle of ALPS packet.
 903                  *
 904                  * There is also possibility that we got 6-byte ALPS
 905                  * packet followed  by 3-byte packet from trackpoint. We
 906                  * can not distinguish between these 2 scenarios but
 907                  * because the latter is unlikely to happen in course of
 908                  * normal operation (user would need to press all
 909                  * buttons on the pad and start moving trackpoint
 910                  * without touching the pad surface) we assume former.
 911                  * Even if we are wrong the wost thing that would happen
 912                  * the cursor would jump but we should not get protocol
 913                  * de-synchronization.
 914                  */
 915
 916                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
 917                                             false);
 918
 919                 /*
 920                  * Continue with the standard ALPS protocol handling,
 921                  * but make sure we won't process it as an interleaved
 922                  * packet again, which may happen if all buttons are
 923                  * pressed. To avoid this let's reset the 4th bit which
 924                  * is normally 1.
 925                  */
 926                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
 927                 psmouse->pktcnt = 4;
 928         }
 929
 930         return PSMOUSE_GOOD_DATA;
 931 }
 932
 933 static void alps_flush_packet(unsigned long data)
 934 {
 935         struct psmouse *psmouse = (struct psmouse *)data;
 936         struct alps_data *priv = psmouse->private;
 937
 938         serio_pause_rx(psmouse->ps2dev.serio);
 939
 940         if (psmouse->pktcnt == psmouse->pktsize) {
 941
 942                 /*
 943                  * We did not any more data in reasonable amount of time.
 944                  * Validate the last 3 bytes and process as a standard
 945                  * ALPS packet.
 946                  */
 947                 if ((psmouse->packet[3] |
 948                      psmouse->packet[4] |
 949                      psmouse->packet[5]) & 0x80) {
 950                         psmouse_dbg(psmouse,
 951                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
 952                                     psmouse->packet + 3);
 953                 } else {
 954                         priv->process_packet(psmouse);
 955                 }
 956                 psmouse->pktcnt = 0;
 957         }
 958
 959         serio_continue_rx(psmouse->ps2dev.serio);
 960 }
 961
 962 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 963 {
 964         struct alps_data *priv = psmouse->private;
 965
 966         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 967                 if (psmouse->pktcnt == 3) {
 968                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
 969                                                     true);
 970                         return PSMOUSE_FULL_PACKET;
 971                 }
 972                 return PSMOUSE_GOOD_DATA;
 973         }
 974
 975         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
 976
 977         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
 978             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
 979                 return alps_handle_interleaved_ps2(psmouse);
 980         }
 981
 982         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
 983                 psmouse_dbg(psmouse,
 984                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
 985                             psmouse->packet[0], priv->mask0, priv->byte0);
 986                 return PSMOUSE_BAD_DATA;
 987         }
 988
 989         /* Bytes 2 - pktsize should have 0 in the highest bit */
 990         if ((priv->proto_version < ALPS_PROTO_V5) &&
 991             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
 992             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
 993                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
 994                             psmouse->pktcnt - 1,
 995                             psmouse->packet[psmouse->pktcnt - 1]);
 996                 return PSMOUSE_BAD_DATA;
 997         }
 998
 999         if (psmouse->pktcnt == psmouse->pktsize) {
1000                 priv->process_packet(psmouse);
1001                 return PSMOUSE_FULL_PACKET;
1002         }
1003
1004         return PSMOUSE_GOOD_DATA;
1005 }
1006
1007 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1008 {
1009         struct ps2dev *ps2dev = &psmouse->ps2dev;
1010         struct alps_data *priv = psmouse->private;
1011         int command;
1012         unsigned char *param;
1013         unsigned char dummy[4];
1014
1015         BUG_ON(nibble > 0xf);
1016
1017         command = priv->nibble_commands[nibble].command;
1018         param = (command & 0x0f00) ?
1019                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1020
1021         if (ps2_command(ps2dev, param, command))
1022                 return -1;
1023
1024         return 0;
1025 }
1026
1027 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1028 {
1029         struct ps2dev *ps2dev = &psmouse->ps2dev;
1030         struct alps_data *priv = psmouse->private;
1031         int i, nibble;
1032
1033         if (ps2_command(ps2dev, NULL, priv->addr_command))
1034                 return -1;
1035
1036         for (i = 12; i >= 0; i -= 4) {
1037                 nibble = (addr >> i) & 0xf;
1038                 if (alps_command_mode_send_nibble(psmouse, nibble))
1039                         return -1;
1040         }
1041
1042         return 0;
1043 }
1044
1045 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1046 {
1047         struct ps2dev *ps2dev = &psmouse->ps2dev;
1048         unsigned char param[4];
1049
1050         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1051                 return -1;
1052
1053         /*
1054          * The address being read is returned in the first two bytes
1055          * of the result. Check that this address matches the expected
1056          * address.
1057          */
1058         if (addr != ((param[0] << 8) | param[1]))
1059                 return -1;
1060
1061         return param[2];
1062 }
1063
1064 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1065 {
1066         if (alps_command_mode_set_addr(psmouse, addr))
1067                 return -1;
1068         return __alps_command_mode_read_reg(psmouse, addr);
1069 }
1070
1071 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1072 {
1073         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1074                 return -1;
1075         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1076                 return -1;
1077         return 0;
1078 }
1079
1080 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1081                                        u8 value)
1082 {
1083         if (alps_command_mode_set_addr(psmouse, addr))
1084                 return -1;
1085         return __alps_command_mode_write_reg(psmouse, value);
1086 }
1087
1088 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1089                         int repeated_command, unsigned char *param)
1090 {
1091         struct ps2dev *ps2dev = &psmouse->ps2dev;
1092
1093         param[0] = 0;
1094         if (init_command && ps2_command(ps2dev, param, init_command))
1095                 return -EIO;
1096
1097         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1098             ps2_command(ps2dev,  NULL, repeated_command) ||
1099             ps2_command(ps2dev,  NULL, repeated_command))
1100                 return -EIO;
1101
1102         param[0] = param[1] = param[2] = 0xff;
1103         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1104                 return -EIO;
1105
1106         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1107                     repeated_command, param);
1108         return 0;
1109 }
1110
1111 static int alps_enter_command_mode(struct psmouse *psmouse)
1112 {
1113         unsigned char param[4];
1114
1115         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1116                 psmouse_err(psmouse, "failed to enter command mode\n");
1117                 return -1;
1118         }
1119
1120         if ((param[0] != 0x88 || (param[1] != 0x07 && param[1] != 0x08)) &&
1121             param[0] != 0x73) {
1122                 psmouse_dbg(psmouse,
1123                             "unknown response while entering command mode\n");
1124                 return -1;
1125         }
1126         return 0;
1127 }
1128
1129 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1130 {
1131         struct ps2dev *ps2dev = &psmouse->ps2dev;
1132         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1133                 return -1;
1134         return 0;
1135 }
1136
1137 /*
1138  * For DualPoint devices select the device that should respond to
1139  * subsequent commands. It looks like glidepad is behind stickpointer,
1140  * I'd thought it would be other way around...
1141  */
1142 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1143 {
1144         struct ps2dev *ps2dev = &psmouse->ps2dev;
1145         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1146
1147         if (ps2_command(ps2dev, NULL, cmd) ||
1148             ps2_command(ps2dev, NULL, cmd) ||
1149             ps2_command(ps2dev, NULL, cmd) ||
1150             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1151                 return -1;
1152
1153         /* we may get 3 more bytes, just ignore them */
1154         ps2_drain(ps2dev, 3, 100);
1155
1156         return 0;
1157 }
1158
1159 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1160 {
1161         struct ps2dev *ps2dev = &psmouse->ps2dev;
1162
1163         /* Try ALPS magic knock - 4 disable before enable */
1164         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1165             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1166             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1167             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1168             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1169                 return -1;
1170
1171         /*
1172          * Switch mouse to poll (remote) mode so motion data will not
1173          * get in our way
1174          */
1175         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1176 }
1177
1178 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1179 {
1180         int i, nibble;
1181
1182         /*
1183          * b0-b11 are valid bits, send sequence is inverse.
1184          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1185          */
1186         for (i = 0; i <= 8; i += 4) {
1187                 nibble = (word >> i) & 0xf;
1188                 if (alps_command_mode_send_nibble(psmouse, nibble))
1189                         return -1;
1190         }
1191
1192         return 0;
1193 }
1194
1195 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1196                                        u16 addr, u16 value)
1197 {
1198         struct ps2dev *ps2dev = &psmouse->ps2dev;
1199
1200         /* 0x0A0 is the command to write the word */
1201         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1202             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1203             alps_monitor_mode_send_word(psmouse, addr) ||
1204             alps_monitor_mode_send_word(psmouse, value) ||
1205             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1206                 return -1;
1207
1208         return 0;
1209 }
1210
1211 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1212 {
1213         struct ps2dev *ps2dev = &psmouse->ps2dev;
1214
1215         if (enable) {
1216                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1217                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1218                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1219                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1220                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1221                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1222                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1223                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1224                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1225                         return -1;
1226         } else {
1227                 /* EC to exit monitor mode */
1228                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1229                         return -1;
1230         }
1231
1232         return 0;
1233 }
1234
1235 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1236 {
1237         u16 reg_val = 0x181;
1238         int ret = -1;
1239
1240         /* enter monitor mode, to write the register */
1241         if (alps_monitor_mode(psmouse, true))
1242                 return -1;
1243
1244         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1245
1246         if (alps_monitor_mode(psmouse, false))
1247                 ret = -1;
1248
1249         return ret;
1250 }
1251
1252 static int alps_get_status(struct psmouse *psmouse, char *param)
1253 {
1254         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1255         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1256                 return -1;
1257
1258         return 0;
1259 }
1260
1261 /*
1262  * Turn touchpad tapping on or off. The sequences are:
1263  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1264  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1265  * My guess that 0xE9 (GetInfo) is here as a sync point.
1266  * For models that also have stickpointer (DualPoints) its tapping
1267  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1268  * we don't fiddle with it.
1269  */
1270 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1271 {
1272         struct ps2dev *ps2dev = &psmouse->ps2dev;
1273         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1274         unsigned char tap_arg = enable ? 0x0A : 0x00;
1275         unsigned char param[4];
1276
1277         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1278             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1279             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1280             ps2_command(ps2dev, &tap_arg, cmd))
1281                 return -1;
1282
1283         if (alps_get_status(psmouse, param))
1284                 return -1;
1285
1286         return 0;
1287 }
1288
1289 /*
1290  * alps_poll() - poll the touchpad for current motion packet.
1291  * Used in resync.
1292  */
1293 static int alps_poll(struct psmouse *psmouse)
1294 {
1295         struct alps_data *priv = psmouse->private;
1296         unsigned char buf[sizeof(psmouse->packet)];
1297         bool poll_failed;
1298
1299         if (priv->flags & ALPS_PASS)
1300                 alps_passthrough_mode_v2(psmouse, true);
1301
1302         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1303                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1304
1305         if (priv->flags & ALPS_PASS)
1306                 alps_passthrough_mode_v2(psmouse, false);
1307
1308         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1309                 return -1;
1310
1311         if ((psmouse->badbyte & 0xc8) == 0x08) {
1312 /*
1313  * Poll the track stick ...
1314  */
1315                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1316                         return -1;
1317         }
1318
1319         memcpy(psmouse->packet, buf, sizeof(buf));
1320         return 0;
1321 }
1322
1323 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1324 {
1325         struct alps_data *priv = psmouse->private;
1326
1327         if ((priv->flags & ALPS_PASS) &&
1328             alps_passthrough_mode_v2(psmouse, true)) {
1329                 return -1;
1330         }
1331
1332         if (alps_tap_mode(psmouse, true)) {
1333                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1334                 return -1;
1335         }
1336
1337         if (alps_absolute_mode_v1_v2(psmouse)) {
1338                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1339                 return -1;
1340         }
1341
1342         if ((priv->flags & ALPS_PASS) &&
1343             alps_passthrough_mode_v2(psmouse, false)) {
1344                 return -1;
1345         }
1346
1347         /* ALPS needs stream mode, otherwise it won't report any data */
1348         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1349                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1350                 return -1;
1351         }
1352
1353         return 0;
1354 }
1355
1356 static int alps_hw_init_v6(struct psmouse *psmouse)
1357 {
1358         unsigned char param[2] = {0xC8, 0x14};
1359
1360         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1361         if (alps_passthrough_mode_v2(psmouse, true))
1362                 return -1;
1363
1364         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1365             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1366             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1367             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1368             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1369                 return -1;
1370
1371         if (alps_passthrough_mode_v2(psmouse, false))
1372                 return -1;
1373
1374         if (alps_absolute_mode_v6(psmouse)) {
1375                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1376                 return -1;
1377         }
1378
1379         return 0;
1380 }
1381
1382 /*
1383  * Enable or disable passthrough mode to the trackstick.
1384  */
1385 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1386                                     int reg_base, bool enable)
1387 {
1388         int reg_val, ret = -1;
1389
1390         if (alps_enter_command_mode(psmouse))
1391                 return -1;
1392
1393         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1394         if (reg_val == -1)
1395                 goto error;
1396
1397         if (enable)
1398                 reg_val |= 0x01;
1399         else
1400                 reg_val &= ~0x01;
1401
1402         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1403
1404 error:
1405         if (alps_exit_command_mode(psmouse))
1406                 ret = -1;
1407         return ret;
1408 }
1409
1410 /* Must be in command mode when calling this function */
1411 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1412 {
1413         int reg_val;
1414
1415         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1416         if (reg_val == -1)
1417                 return -1;
1418
1419         reg_val |= 0x06;
1420         if (__alps_command_mode_write_reg(psmouse, reg_val))
1421                 return -1;
1422
1423         return 0;
1424 }
1425
1426 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
1427 {
1428         int ret = -EIO, reg_val;
1429
1430         if (alps_enter_command_mode(psmouse))
1431                 goto error;
1432
1433         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
1434         if (reg_val == -1)
1435                 goto error;
1436
1437         /* bit 7: trackstick is present */
1438         ret = reg_val & 0x80 ? 0 : -ENODEV;
1439
1440 error:
1441         alps_exit_command_mode(psmouse);
1442         return ret;
1443 }
1444
1445 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
1446 {
1447         struct ps2dev *ps2dev = &psmouse->ps2dev;
1448         int ret = 0;
1449         unsigned char param[4];
1450
1451         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
1452                 return -EIO;
1453
1454         /*
1455          * E7 report for the trackstick
1456          *
1457          * There have been reports of failures to seem to trace back
1458          * to the above trackstick check failing. When these occur
1459          * this E7 report fails, so when that happens we continue
1460          * with the assumption that there isn't a trackstick after
1461          * all.
1462          */
1463         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
1464                 psmouse_warn(psmouse, "trackstick E7 report failed\n");
1465                 ret = -ENODEV;
1466         } else {
1467                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
1468
1469                 /*
1470                  * Not sure what this does, but it is absolutely
1471                  * essential. Without it, the touchpad does not
1472                  * work at all and the trackstick just emits normal
1473                  * PS/2 packets.
1474                  */
1475                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1476                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1477                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1478                     alps_command_mode_send_nibble(psmouse, 0x9) ||
1479                     alps_command_mode_send_nibble(psmouse, 0x4)) {
1480                         psmouse_err(psmouse,
1481                                     "Error sending magic E6 sequence\n");
1482                         ret = -EIO;
1483                         goto error;
1484                 }
1485
1486                 /*
1487                  * This ensures the trackstick packets are in the format
1488                  * supported by this driver. If bit 1 isn't set the packet
1489                  * format is different.
1490                  */
1491                 if (alps_enter_command_mode(psmouse) ||
1492                     alps_command_mode_write_reg(psmouse,
1493                                                 reg_base + 0x08, 0x82) ||
1494                     alps_exit_command_mode(psmouse))
1495                         ret = -EIO;
1496         }
1497
1498 error:
1499         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
1500                 ret = -EIO;
1501
1502         return ret;
1503 }
1504
1505 static int alps_hw_init_v3(struct psmouse *psmouse)
1506 {
1507         struct ps2dev *ps2dev = &psmouse->ps2dev;
1508         int reg_val;
1509         unsigned char param[4];
1510
1511         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
1512         if (reg_val == -EIO)
1513                 goto error;
1514
1515         if (reg_val == 0 &&
1516             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
1517                 goto error;
1518
1519         if (alps_enter_command_mode(psmouse) ||
1520             alps_absolute_mode_v3(psmouse)) {
1521                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1522                 goto error;
1523         }
1524
1525         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1526         if (reg_val == -1)
1527                 goto error;
1528         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1529                 goto error;
1530
1531         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1532         if (reg_val == -1)
1533                 goto error;
1534         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1535                 goto error;
1536
1537         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1538                 goto error;
1539         if (__alps_command_mode_write_reg(psmouse, 0x04))
1540                 goto error;
1541
1542         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1543                 goto error;
1544         if (__alps_command_mode_write_reg(psmouse, 0x03))
1545                 goto error;
1546
1547         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1548                 goto error;
1549         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1550                 goto error;
1551
1552         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1553                 goto error;
1554         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1555                 goto error;
1556
1557         alps_exit_command_mode(psmouse);
1558
1559         /* Set rate and enable data reporting */
1560         param[0] = 0x64;
1561         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1562             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1563                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1564                 return -1;
1565         }
1566
1567         return 0;
1568
1569 error:
1570         /*
1571          * Leaving the touchpad in command mode will essentially render
1572          * it unusable until the machine reboots, so exit it here just
1573          * to be safe
1574          */
1575         alps_exit_command_mode(psmouse);
1576         return -1;
1577 }
1578
1579 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
1580 {
1581         struct alps_data *priv = psmouse->private;
1582         struct ps2dev *ps2dev = &psmouse->ps2dev;
1583         int reg_val, ret = -1;
1584
1585         if (priv->flags & ALPS_DUALPOINT) {
1586                 reg_val = alps_setup_trackstick_v3(psmouse,
1587                                                    ALPS_REG_BASE_RUSHMORE);
1588                 if (reg_val == -EIO)
1589                         goto error;
1590                 if (reg_val == -ENODEV)
1591                         priv->flags &= ~ALPS_DUALPOINT;
1592         }
1593
1594         if (alps_enter_command_mode(psmouse) ||
1595             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
1596             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
1597                 goto error;
1598
1599         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
1600         if (reg_val == -1)
1601                 goto error;
1602         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
1603                 goto error;
1604
1605         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
1606                 goto error;
1607
1608         /* enter absolute mode */
1609         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
1610         if (reg_val == -1)
1611                 goto error;
1612         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
1613                 goto error;
1614
1615         alps_exit_command_mode(psmouse);
1616         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1617
1618 error:
1619         alps_exit_command_mode(psmouse);
1620         return ret;
1621 }
1622
1623 /* Must be in command mode when calling this function */
1624 static int alps_absolute_mode_v4(struct psmouse *psmouse)
1625 {
1626         int reg_val;
1627
1628         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1629         if (reg_val == -1)
1630                 return -1;
1631
1632         reg_val |= 0x02;
1633         if (__alps_command_mode_write_reg(psmouse, reg_val))
1634                 return -1;
1635
1636         return 0;
1637 }
1638
1639 static int alps_hw_init_v4(struct psmouse *psmouse)
1640 {
1641         struct ps2dev *ps2dev = &psmouse->ps2dev;
1642         unsigned char param[4];
1643
1644         if (alps_enter_command_mode(psmouse))
1645                 goto error;
1646
1647         if (alps_absolute_mode_v4(psmouse)) {
1648                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1649                 goto error;
1650         }
1651
1652         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
1653                 goto error;
1654
1655         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
1656                 goto error;
1657
1658         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
1659                 goto error;
1660
1661         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
1662                 goto error;
1663
1664         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
1665                 goto error;
1666
1667         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
1668                 goto error;
1669
1670         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
1671                 goto error;
1672
1673         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
1674                 goto error;
1675
1676         alps_exit_command_mode(psmouse);
1677
1678         /*
1679          * This sequence changes the output from a 9-byte to an
1680          * 8-byte format. All the same data seems to be present,
1681          * just in a more compact format.
1682          */
1683         param[0] = 0xc8;
1684         param[1] = 0x64;
1685         param[2] = 0x50;
1686         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1687             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
1688             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
1689             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1690                 return -1;
1691
1692         /* Set rate and enable data reporting */
1693         param[0] = 0x64;
1694         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1695             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1696                 psmouse_err(psmouse, "Failed to enable data reporting\n");
1697                 return -1;
1698         }
1699
1700         return 0;
1701
1702 error:
1703         /*
1704          * Leaving the touchpad in command mode will essentially render
1705          * it unusable until the machine reboots, so exit it here just
1706          * to be safe
1707          */
1708         alps_exit_command_mode(psmouse);
1709         return -1;
1710 }
1711
1712 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
1713 {
1714         struct ps2dev *ps2dev = &psmouse->ps2dev;
1715         unsigned char param[2];
1716
1717         /* This is dolphin "v1" as empirically defined by florin9doi */
1718         param[0] = 0x64;
1719         param[1] = 0x28;
1720
1721         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
1722             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1723             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1724                 return -1;
1725
1726         return 0;
1727 }
1728
1729 static void alps_set_defaults(struct alps_data *priv)
1730 {
1731         priv->byte0 = 0x8f;
1732         priv->mask0 = 0x8f;
1733         priv->flags = ALPS_DUALPOINT;
1734
1735         priv->x_max = 2000;
1736         priv->y_max = 1400;
1737         priv->x_bits = 15;
1738         priv->y_bits = 11;
1739
1740         switch (priv->proto_version) {
1741         case ALPS_PROTO_V1:
1742         case ALPS_PROTO_V2:
1743                 priv->hw_init = alps_hw_init_v1_v2;
1744                 priv->process_packet = alps_process_packet_v1_v2;
1745                 priv->set_abs_params = alps_set_abs_params_st;
1746                 priv->x_max = 1023;
1747                 priv->y_max = 767;
1748                 break;
1749         case ALPS_PROTO_V3:
1750                 priv->hw_init = alps_hw_init_v3;
1751                 priv->process_packet = alps_process_packet_v3;
1752                 priv->set_abs_params = alps_set_abs_params_mt;
1753                 priv->decode_fields = alps_decode_pinnacle;
1754                 priv->nibble_commands = alps_v3_nibble_commands;
1755                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
1756                 break;
1757         case ALPS_PROTO_V4:
1758                 priv->hw_init = alps_hw_init_v4;
1759                 priv->process_packet = alps_process_packet_v4;
1760                 priv->set_abs_params = alps_set_abs_params_mt;
1761                 priv->nibble_commands = alps_v4_nibble_commands;
1762                 priv->addr_command = PSMOUSE_CMD_DISABLE;
1763                 break;
1764         case ALPS_PROTO_V5:
1765                 priv->hw_init = alps_hw_init_dolphin_v1;
1766                 priv->process_packet = alps_process_packet_v3;
1767                 priv->decode_fields = alps_decode_dolphin;
1768                 priv->set_abs_params = alps_set_abs_params_mt;
1769                 priv->nibble_commands = alps_v3_nibble_commands;
1770                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
1771                 priv->byte0 = 0xc8;
1772                 priv->mask0 = 0xc8;
1773                 priv->flags = 0;
1774                 priv->x_max = 1360;
1775                 priv->y_max = 660;
1776                 priv->x_bits = 23;
1777                 priv->y_bits = 12;
1778                 break;
1779         case ALPS_PROTO_V6:
1780                 priv->hw_init = alps_hw_init_v6;
1781                 priv->process_packet = alps_process_packet_v6;
1782                 priv->set_abs_params = alps_set_abs_params_st;
1783                 priv->nibble_commands = alps_v6_nibble_commands;
1784                 priv->x_max = 2047;
1785                 priv->y_max = 1535;
1786                 break;
1787         }
1788 }
1789
1790 static int alps_match_table(struct psmouse *psmouse, struct alps_data *priv,
1791                             unsigned char *e7, unsigned char *ec)
1792 {
1793         const struct alps_model_info *model;
1794         int i;
1795
1796         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
1797                 model = &alps_model_data[i];
1798
1799                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
1800                     (!model->command_mode_resp ||
1801                      model->command_mode_resp == ec[2])) {
1802
1803                         priv->proto_version = model->proto_version;
1804                         alps_set_defaults(priv);
1805
1806                         priv->flags = model->flags;
1807                         priv->byte0 = model->byte0;
1808                         priv->mask0 = model->mask0;
1809
1810                         return 0;
1811                 }
1812         }
1813
1814         return -EINVAL;
1815 }
1816
1817 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
1818 {
1819         unsigned char e6[4], e7[4], ec[4];
1820
1821         /*
1822          * First try "E6 report".
1823          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
1824          * The bits 0-2 of the first byte will be 1s if some buttons are
1825          * pressed.
1826          */
1827         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
1828                          PSMOUSE_CMD_SETSCALE11, e6))
1829                 return -EIO;
1830
1831         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
1832                 return -EINVAL;
1833
1834         /*
1835          * Now get the "E7" and "EC" reports.  These will uniquely identify
1836          * most ALPS touchpads.
1837          */
1838         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
1839                          PSMOUSE_CMD_SETSCALE21, e7) ||
1840             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
1841                          PSMOUSE_CMD_RESET_WRAP, ec) ||
1842             alps_exit_command_mode(psmouse))
1843                 return -EIO;
1844
1845         if (alps_match_table(psmouse, priv, e7, ec) == 0) {
1846                 return 0;
1847         } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
1848                    ec[0] == 0x73 && ec[1] == 0x01) {
1849                 priv->proto_version = ALPS_PROTO_V5;
1850                 alps_set_defaults(priv);
1851
1852                 return 0;
1853         } else if (ec[0] == 0x88 && ec[1] == 0x08) {
1854                 priv->proto_version = ALPS_PROTO_V3;
1855                 alps_set_defaults(priv);
1856
1857                 priv->hw_init = alps_hw_init_rushmore_v3;
1858                 priv->decode_fields = alps_decode_rushmore;
1859                 priv->x_bits = 16;
1860                 priv->y_bits = 12;
1861
1862                 /* hack to make addr_command, nibble_command available */
1863                 psmouse->private = priv;
1864
1865                 if (alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_RUSHMORE))
1866                         priv->flags &= ~ALPS_DUALPOINT;
1867
1868                 return 0;
1869         } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
1870                    ec[2] >= 0x90 && ec[2] <= 0x9d) {
1871                 priv->proto_version = ALPS_PROTO_V3;
1872                 alps_set_defaults(priv);
1873
1874                 return 0;
1875         }
1876
1877         psmouse_info(psmouse,
1878                      "Unknown ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
1879
1880         return -EINVAL;
1881 }
1882
1883 static int alps_reconnect(struct psmouse *psmouse)
1884 {
1885         struct alps_data *priv = psmouse->private;
1886
1887         psmouse_reset(psmouse);
1888
1889         if (alps_identify(psmouse, priv) < 0)
1890                 return -1;
1891
1892         return priv->hw_init(psmouse);
1893 }
1894
1895 static void alps_disconnect(struct psmouse *psmouse)
1896 {
1897         struct alps_data *priv = psmouse->private;
1898
1899         psmouse_reset(psmouse);
1900         del_timer_sync(&priv->timer);
1901         input_unregister_device(priv->dev2);
1902         kfree(priv);
1903 }
1904
1905 static void alps_set_abs_params_st(struct alps_data *priv,
1906                                    struct input_dev *dev1)
1907 {
1908         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
1909         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
1910 }
1911
1912 static void alps_set_abs_params_mt(struct alps_data *priv,
1913                                    struct input_dev *dev1)
1914 {
1915         set_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
1916         input_mt_init_slots(dev1, 2, 0);
1917         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
1918         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
1919
1920         set_bit(BTN_TOOL_DOUBLETAP, dev1->keybit);
1921         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
1922         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
1923
1924         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
1925         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
1926 }
1927
1928 int alps_init(struct psmouse *psmouse)
1929 {
1930         struct alps_data *priv;
1931         struct input_dev *dev1 = psmouse->dev, *dev2;
1932
1933         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
1934         dev2 = input_allocate_device();
1935         if (!priv || !dev2)
1936                 goto init_fail;
1937
1938         priv->dev2 = dev2;
1939         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
1940
1941         psmouse->private = priv;
1942
1943         psmouse_reset(psmouse);
1944
1945         if (alps_identify(psmouse, priv) < 0)
1946                 goto init_fail;
1947
1948         if (priv->hw_init(psmouse))
1949                 goto init_fail;
1950
1951         /*
1952          * Undo part of setup done for us by psmouse core since touchpad
1953          * is not a relative device.
1954          */
1955         __clear_bit(EV_REL, dev1->evbit);
1956         __clear_bit(REL_X, dev1->relbit);
1957         __clear_bit(REL_Y, dev1->relbit);
1958
1959         /*
1960          * Now set up our capabilities.
1961          */
1962         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
1963         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
1964         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
1965         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
1966                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1967
1968         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
1969
1970         priv->set_abs_params(priv, dev1);
1971         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
1972
1973         if (priv->flags & ALPS_WHEEL) {
1974                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
1975                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
1976         }
1977
1978         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
1979                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
1980                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
1981         }
1982
1983         if (priv->flags & ALPS_FOUR_BUTTONS) {
1984                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
1985                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
1986                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
1987                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
1988         } else {
1989                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
1990         }
1991
1992         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
1993         dev2->phys = priv->phys;
1994         dev2->name = (priv->flags & ALPS_DUALPOINT) ?
1995                      "DualPoint Stick" : "ALPS PS/2 Device";
1996         dev2->id.bustype = BUS_I8042;
1997         dev2->id.vendor  = 0x0002;
1998         dev2->id.product = PSMOUSE_ALPS;
1999         dev2->id.version = 0x0000;
2000         dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2001
2002         dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
2003         dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
2004         dev2->keybit[BIT_WORD(BTN_LEFT)] =
2005                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
2006
2007         if (input_register_device(priv->dev2))
2008                 goto init_fail;
2009
2010         psmouse->protocol_handler = alps_process_byte;
2011         psmouse->poll = alps_poll;
2012         psmouse->disconnect = alps_disconnect;
2013         psmouse->reconnect = alps_reconnect;
2014         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2015
2016         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2017         psmouse->resync_time = 0;
2018
2019         return 0;
2020
2021 init_fail:
2022         psmouse_reset(psmouse);
2023         input_free_device(dev2);
2024         kfree(priv);
2025         psmouse->private = NULL;
2026         return -1;
2027 }
2028
2029 int alps_detect(struct psmouse *psmouse, bool set_properties)
2030 {
2031         struct alps_data dummy;
2032
2033         if (alps_identify(psmouse, &dummy) < 0)
2034                 return -1;
2035
2036         if (set_properties) {
2037                 psmouse->vendor = "ALPS";
2038                 psmouse->name = dummy.flags & ALPS_DUALPOINT ?
2039                                 "DualPoint TouchPad" : "GlidePoint";
2040                 psmouse->model = dummy.proto_version << 8;
2041         }
2042         return 0;
2043 }
2044