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 #include <linux/dmi.h>
  24
  25 #include "psmouse.h"
  26 #include "alps.h"
  27
  28 /*
  29  * Definitions for ALPS version 3 and 4 command mode protocol
  30  */
  31 #define ALPS_CMD_NIBBLE_10      0x01f2
  32
  33 #define ALPS_REG_BASE_RUSHMORE  0xc2c0
  34 #define ALPS_REG_BASE_V7        0xc2c0
  35 #define ALPS_REG_BASE_PINNACLE  0x0000
  36
  37 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
  38         { PSMOUSE_CMD_SETPOLL,          0x00 }, /* 0 */
  39         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
  40         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
  41         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
  42         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
  43         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
  44         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
  45         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
  46         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
  47         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
  48         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
  49         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
  50         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
  51         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
  52         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
  53         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  54 };
  55
  56 static const struct alps_nibble_commands alps_v4_nibble_commands[] = {
  57         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
  58         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
  59         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
  60         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
  61         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
  62         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
  63         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
  64         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
  65         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
  66         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
  67         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
  68         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
  69         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
  70         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
  71         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
  72         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  73 };
  74
  75 static const struct alps_nibble_commands alps_v6_nibble_commands[] = {
  76         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
  77         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 1 */
  78         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 2 */
  79         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 3 */
  80         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 4 */
  81         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 5 */
  82         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 6 */
  83         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 7 */
  84         { PSMOUSE_CMD_GETID,            0x00 }, /* 8 */
  85         { PSMOUSE_CMD_GETINFO,          0x00 }, /* 9 */
  86         { PSMOUSE_CMD_SETRES,           0x00 }, /* a */
  87         { PSMOUSE_CMD_SETRES,           0x01 }, /* b */
  88         { PSMOUSE_CMD_SETRES,           0x02 }, /* c */
  89         { PSMOUSE_CMD_SETRES,           0x03 }, /* d */
  90         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* e */
  91         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
  92 };
  93
  94
  95 #define ALPS_DUALPOINT          0x02    /* touchpad has trackstick */
  96 #define ALPS_PASS               0x04    /* device has a pass-through port */
  97
  98 #define ALPS_WHEEL              0x08    /* hardware wheel present */
  99 #define ALPS_FW_BK_1            0x10    /* front & back buttons present */
 100 #define ALPS_FW_BK_2            0x20    /* front & back buttons present */
 101 #define ALPS_FOUR_BUTTONS       0x40    /* 4 direction button present */
 102 #define ALPS_PS2_INTERLEAVED    0x80    /* 3-byte PS/2 packet interleaved with
 103                                            6-byte ALPS packet */
 104 #define ALPS_STICK_BITS         0x100   /* separate stick button bits */
 105 #define ALPS_BUTTONPAD          0x200   /* device is a clickpad */
 106
 107 static const struct alps_model_info alps_model_data[] = {
 108         { { 0x32, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Toshiba Salellite Pro M10 */
 109         { { 0x33, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } },                               /* UMAX-530T */
 110         { { 0x53, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 111         { { 0x53, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 112         { { 0x60, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },                               /* HP ze1115 */
 113         { { 0x63, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 114         { { 0x63, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 115         { { 0x63, 0x02, 0x28 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Fujitsu Siemens S6010 */
 116         { { 0x63, 0x02, 0x3c }, 0x00, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } },              /* Toshiba Satellite S2400-103 */
 117         { { 0x63, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } },            /* NEC Versa L320 */
 118         { { 0x63, 0x02, 0x64 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 119         { { 0x63, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D800 */
 120         { { 0x73, 0x00, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } },          /* ThinkPad R61 8918-5QG */
 121         { { 0x73, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 122         { { 0x73, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Ahtec Laptop */
 123
 124         /*
 125          * XXX This entry is suspicious. First byte has zero lower nibble,
 126          * which is what a normal mouse would report. Also, the value 0x0e
 127          * isn't valid per PS/2 spec.
 128          */
 129         { { 0x20, 0x02, 0x0e }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 130
 131         { { 0x22, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 132         { { 0x22, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D600 */
 133         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
 134         { { 0x62, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf,
 135                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },
 136         { { 0x73, 0x00, 0x14 }, 0x00, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } },          /* Dell XT2 */
 137         { { 0x73, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } },       /* Dell Vostro 1400 */
 138         { { 0x52, 0x01, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff,
 139                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },                          /* Toshiba Tecra A11-11L */
 140         { { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } },
 141 };
 142
 143 static const struct alps_protocol_info alps_v3_protocol_data = {
 144         ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT
 145 };
 146
 147 static const struct alps_protocol_info alps_v3_rushmore_data = {
 148         ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT
 149 };
 150
 151 static const struct alps_protocol_info alps_v5_protocol_data = {
 152         ALPS_PROTO_V5, 0xc8, 0xd8, 0
 153 };
 154
 155 static const struct alps_protocol_info alps_v7_protocol_data = {
 156         ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
 157 };
 158
 159 static const struct alps_protocol_info alps_v8_protocol_data = {
 160         ALPS_PROTO_V8, 0x18, 0x18, 0
 161 };
 162
 163 /*
 164  * Some v2 models report the stick buttons in separate bits
 165  */
 166 static const struct dmi_system_id alps_dmi_has_separate_stick_buttons[] = {
 167 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
 168         {
 169                 /* Extrapolated from other entries */
 170                 .matches = {
 171                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 172                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D420"),
 173                 },
 174         },
 175         {
 176                 /* Reported-by: Hans de Bruin <jmdebruin@xmsnet.nl> */
 177                 .matches = {
 178                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 179                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D430"),
 180                 },
 181         },
 182         {
 183                 /* Reported-by: Hans de Goede <hdegoede@redhat.com> */
 184                 .matches = {
 185                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 186                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D620"),
 187                 },
 188         },
 189         {
 190                 /* Extrapolated from other entries */
 191                 .matches = {
 192                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 193                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D630"),
 194                 },
 195         },
 196 #endif
 197         { }
 198 };
 199
 200 static void alps_set_abs_params_st(struct alps_data *priv,
 201                                    struct input_dev *dev1);
 202 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
 203                                         struct input_dev *dev1);
 204 static void alps_set_abs_params_v7(struct alps_data *priv,
 205                                    struct input_dev *dev1);
 206 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
 207                                        struct input_dev *dev1);
 208
 209 /* Packet formats are described in Documentation/input/alps.txt */
 210
 211 static bool alps_is_valid_first_byte(struct alps_data *priv,
 212                                      unsigned char data)
 213 {
 214         return (data & priv->mask0) == priv->byte0;
 215 }
 216
 217 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
 218                                 int left, int right, int middle)
 219 {
 220         struct input_dev *dev;
 221
 222         /*
 223          * If shared button has already been reported on the
 224          * other device (dev2) then this event should be also
 225          * sent through that device.
 226          */
 227         dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
 228         input_report_key(dev, BTN_LEFT, left);
 229
 230         dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
 231         input_report_key(dev, BTN_RIGHT, right);
 232
 233         dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
 234         input_report_key(dev, BTN_MIDDLE, middle);
 235
 236         /*
 237          * Sync the _other_ device now, we'll do the first
 238          * device later once we report the rest of the events.
 239          */
 240         if (dev2)
 241                 input_sync(dev2);
 242 }
 243
 244 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
 245 {
 246         struct alps_data *priv = psmouse->private;
 247         unsigned char *packet = psmouse->packet;
 248         struct input_dev *dev = psmouse->dev;
 249         struct input_dev *dev2 = priv->dev2;
 250         int x, y, z, ges, fin, left, right, middle;
 251         int back = 0, forward = 0;
 252
 253         if (priv->proto_version == ALPS_PROTO_V1) {
 254                 left = packet[2] & 0x10;
 255                 right = packet[2] & 0x08;
 256                 middle = 0;
 257                 x = packet[1] | ((packet[0] & 0x07) << 7);
 258                 y = packet[4] | ((packet[3] & 0x07) << 7);
 259                 z = packet[5];
 260         } else {
 261                 left = packet[3] & 1;
 262                 right = packet[3] & 2;
 263                 middle = packet[3] & 4;
 264                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 265                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 266                 z = packet[5];
 267         }
 268
 269         if (priv->flags & ALPS_FW_BK_1) {
 270                 back = packet[0] & 0x10;
 271                 forward = packet[2] & 4;
 272         }
 273
 274         if (priv->flags & ALPS_FW_BK_2) {
 275                 back = packet[3] & 4;
 276                 forward = packet[2] & 4;
 277                 if ((middle = forward && back))
 278                         forward = back = 0;
 279         }
 280
 281         ges = packet[2] & 1;
 282         fin = packet[2] & 2;
 283
 284         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
 285                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 286                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 287
 288                 alps_report_buttons(dev2, dev, left, right, middle);
 289
 290                 input_sync(dev2);
 291                 return;
 292         }
 293
 294         /* Some models have separate stick button bits */
 295         if (priv->flags & ALPS_STICK_BITS) {
 296                 left |= packet[0] & 1;
 297                 right |= packet[0] & 2;
 298                 middle |= packet[0] & 4;
 299         }
 300
 301         alps_report_buttons(dev, dev2, left, right, middle);
 302
 303         /* Convert hardware tap to a reasonable Z value */
 304         if (ges && !fin)
 305                 z = 40;
 306
 307         /*
 308          * A "tap and drag" operation is reported by the hardware as a transition
 309          * from (!fin && ges) to (fin && ges). This should be translated to the
 310          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 311          */
 312         if (ges && fin && !priv->prev_fin) {
 313                 input_report_abs(dev, ABS_X, x);
 314                 input_report_abs(dev, ABS_Y, y);
 315                 input_report_abs(dev, ABS_PRESSURE, 0);
 316                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 317                 input_sync(dev);
 318         }
 319         priv->prev_fin = fin;
 320
 321         if (z > 30)
 322                 input_report_key(dev, BTN_TOUCH, 1);
 323         if (z < 25)
 324                 input_report_key(dev, BTN_TOUCH, 0);
 325
 326         if (z > 0) {
 327                 input_report_abs(dev, ABS_X, x);
 328                 input_report_abs(dev, ABS_Y, y);
 329         }
 330
 331         input_report_abs(dev, ABS_PRESSURE, z);
 332         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 333
 334         if (priv->flags & ALPS_WHEEL)
 335                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 336
 337         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 338                 input_report_key(dev, BTN_FORWARD, forward);
 339                 input_report_key(dev, BTN_BACK, back);
 340         }
 341
 342         if (priv->flags & ALPS_FOUR_BUTTONS) {
 343                 input_report_key(dev, BTN_0, packet[2] & 4);
 344                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 345                 input_report_key(dev, BTN_2, packet[3] & 4);
 346                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 347         }
 348
 349         input_sync(dev);
 350 }
 351
 352 static void alps_get_bitmap_points(unsigned int map,
 353                                    struct alps_bitmap_point *low,
 354                                    struct alps_bitmap_point *high,
 355                                    int *fingers)
 356 {
 357         struct alps_bitmap_point *point;
 358         int i, bit, prev_bit = 0;
 359
 360         point = low;
 361         for (i = 0; map != 0; i++, map >>= 1) {
 362                 bit = map & 1;
 363                 if (bit) {
 364                         if (!prev_bit) {
 365                                 point->start_bit = i;
 366                                 point->num_bits = 0;
 367                                 (*fingers)++;
 368                         }
 369                         point->num_bits++;
 370                 } else {
 371                         if (prev_bit)
 372                                 point = high;
 373                 }
 374                 prev_bit = bit;
 375         }
 376 }
 377
 378 /*
 379  * Process bitmap data from semi-mt protocols. Returns the number of
 380  * fingers detected. A return value of 0 means at least one of the
 381  * bitmaps was empty.
 382  *
 383  * The bitmaps don't have enough data to track fingers, so this function
 384  * only generates points representing a bounding box of all contacts.
 385  * These points are returned in fields->mt when the return value
 386  * is greater than 0.
 387  */
 388 static int alps_process_bitmap(struct alps_data *priv,
 389                                struct alps_fields *fields)
 390 {
 391         int i, fingers_x = 0, fingers_y = 0, fingers, closest;
 392         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 393         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 394         struct input_mt_pos corner[4];
 395
 396         if (!fields->x_map || !fields->y_map)
 397                 return 0;
 398
 399         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
 400         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
 401
 402         /*
 403          * Fingers can overlap, so we use the maximum count of fingers
 404          * on either axis as the finger count.
 405          */
 406         fingers = max(fingers_x, fingers_y);
 407
 408         /*
 409          * If an axis reports only a single contact, we have overlapping or
 410          * adjacent fingers. Divide the single contact between the two points.
 411          */
 412         if (fingers_x == 1) {
 413                 i = (x_low.num_bits - 1) / 2;
 414                 x_low.num_bits = x_low.num_bits - i;
 415                 x_high.start_bit = x_low.start_bit + i;
 416                 x_high.num_bits = max(i, 1);
 417         }
 418         if (fingers_y == 1) {
 419                 i = (y_low.num_bits - 1) / 2;
 420                 y_low.num_bits = y_low.num_bits - i;
 421                 y_high.start_bit = y_low.start_bit + i;
 422                 y_high.num_bits = max(i, 1);
 423         }
 424
 425         /* top-left corner */
 426         corner[0].x =
 427                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 428                 (2 * (priv->x_bits - 1));
 429         corner[0].y =
 430                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 431                 (2 * (priv->y_bits - 1));
 432
 433         /* top-right corner */
 434         corner[1].x =
 435                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 436                 (2 * (priv->x_bits - 1));
 437         corner[1].y =
 438                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 439                 (2 * (priv->y_bits - 1));
 440
 441         /* bottom-right corner */
 442         corner[2].x =
 443                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 444                 (2 * (priv->x_bits - 1));
 445         corner[2].y =
 446                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 447                 (2 * (priv->y_bits - 1));
 448
 449         /* bottom-left corner */
 450         corner[3].x =
 451                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 452                 (2 * (priv->x_bits - 1));
 453         corner[3].y =
 454                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 455                 (2 * (priv->y_bits - 1));
 456
 457         /* x-bitmap order is reversed on v5 touchpads  */
 458         if (priv->proto_version == ALPS_PROTO_V5) {
 459                 for (i = 0; i < 4; i++)
 460                         corner[i].x = priv->x_max - corner[i].x;
 461         }
 462
 463         /* y-bitmap order is reversed on v3 and v4 touchpads  */
 464         if (priv->proto_version == ALPS_PROTO_V3 ||
 465             priv->proto_version == ALPS_PROTO_V4) {
 466                 for (i = 0; i < 4; i++)
 467                         corner[i].y = priv->y_max - corner[i].y;
 468         }
 469
 470         /*
 471          * We only select a corner for the second touch once per 2 finger
 472          * touch sequence to avoid the chosen corner (and thus the coordinates)
 473          * jumping around when the first touch is in the middle.
 474          */
 475         if (priv->second_touch == -1) {
 476                 /* Find corner closest to our st coordinates */
 477                 closest = 0x7fffffff;
 478                 for (i = 0; i < 4; i++) {
 479                         int dx = fields->st.x - corner[i].x;
 480                         int dy = fields->st.y - corner[i].y;
 481                         int distance = dx * dx + dy * dy;
 482
 483                         if (distance < closest) {
 484                                 priv->second_touch = i;
 485                                 closest = distance;
 486                         }
 487                 }
 488                 /* And select the opposite corner to use for the 2nd touch */
 489                 priv->second_touch = (priv->second_touch + 2) % 4;
 490         }
 491
 492         fields->mt[0] = fields->st;
 493         fields->mt[1] = corner[priv->second_touch];
 494
 495         return fingers;
 496 }
 497
 498 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
 499 {
 500         input_mt_slot(dev, slot);
 501         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 502         input_report_abs(dev, ABS_MT_POSITION_X, x);
 503         input_report_abs(dev, ABS_MT_POSITION_Y, y);
 504 }
 505
 506 static void alps_report_mt_data(struct psmouse *psmouse, int n)
 507 {
 508         struct alps_data *priv = psmouse->private;
 509         struct input_dev *dev = psmouse->dev;
 510         struct alps_fields *f = &priv->f;
 511         int i, slot[MAX_TOUCHES];
 512
 513         input_mt_assign_slots(dev, slot, f->mt, n, 0);
 514         for (i = 0; i < n; i++)
 515                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
 516
 517         input_mt_sync_frame(dev);
 518 }
 519
 520 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
 521 {
 522         struct alps_data *priv = psmouse->private;
 523         struct input_dev *dev = psmouse->dev;
 524         struct alps_fields *f = &priv->f;
 525
 526         /* Use st data when we don't have mt data */
 527         if (fingers < 2) {
 528                 f->mt[0].x = f->st.x;
 529                 f->mt[0].y = f->st.y;
 530                 fingers = f->pressure > 0 ? 1 : 0;
 531                 priv->second_touch = -1;
 532         }
 533
 534         if (fingers >= 1)
 535                 alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y);
 536         if (fingers >= 2)
 537                 alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y);
 538         input_mt_sync_frame(dev);
 539
 540         input_mt_report_finger_count(dev, fingers);
 541
 542         input_report_key(dev, BTN_LEFT, f->left);
 543         input_report_key(dev, BTN_RIGHT, f->right);
 544         input_report_key(dev, BTN_MIDDLE, f->middle);
 545
 546         input_report_abs(dev, ABS_PRESSURE, f->pressure);
 547
 548         input_sync(dev);
 549 }
 550
 551 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 552 {
 553         struct alps_data *priv = psmouse->private;
 554         unsigned char *packet = psmouse->packet;
 555         struct input_dev *dev = priv->dev2;
 556         int x, y, z, left, right, middle;
 557
 558         /* It should be a DualPoint when received trackstick packet */
 559         if (!(priv->flags & ALPS_DUALPOINT)) {
 560                 psmouse_warn(psmouse,
 561                              "Rejected trackstick packet from non DualPoint device");
 562                 return;
 563         }
 564
 565         /* Sanity check packet */
 566         if (!(packet[0] & 0x40)) {
 567                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 568                 return;
 569         }
 570
 571         /*
 572          * There's a special packet that seems to indicate the end
 573          * of a stream of trackstick data. Filter these out.
 574          */
 575         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 576                 return;
 577
 578         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 579         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 580         z = (packet[4] & 0x7c) >> 2;
 581
 582         /*
 583          * The x and y values tend to be quite large, and when used
 584          * alone the trackstick is difficult to use. Scale them down
 585          * to compensate.
 586          */
 587         x /= 8;
 588         y /= 8;
 589
 590         input_report_rel(dev, REL_X, x);
 591         input_report_rel(dev, REL_Y, -y);
 592
 593         /*
 594          * Most ALPS models report the trackstick buttons in the touchpad
 595          * packets, but a few report them here. No reliable way has been
 596          * found to differentiate between the models upfront, so we enable
 597          * the quirk in response to seeing a button press in the trackstick
 598          * packet.
 599          */
 600         left = packet[3] & 0x01;
 601         right = packet[3] & 0x02;
 602         middle = packet[3] & 0x04;
 603
 604         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 605             (left || right || middle))
 606                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 607
 608         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 609                 input_report_key(dev, BTN_LEFT, left);
 610                 input_report_key(dev, BTN_RIGHT, right);
 611                 input_report_key(dev, BTN_MIDDLE, middle);
 612         }
 613
 614         input_sync(dev);
 615         return;
 616 }
 617
 618 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 619 {
 620         f->left = !!(p[3] & 0x01);
 621         f->right = !!(p[3] & 0x02);
 622         f->middle = !!(p[3] & 0x04);
 623
 624         f->ts_left = !!(p[3] & 0x10);
 625         f->ts_right = !!(p[3] & 0x20);
 626         f->ts_middle = !!(p[3] & 0x40);
 627 }
 628
 629 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 630                                  struct psmouse *psmouse)
 631 {
 632         f->first_mp = !!(p[4] & 0x40);
 633         f->is_mp = !!(p[0] & 0x40);
 634
 635         if (f->is_mp) {
 636                 f->fingers = (p[5] & 0x3) + 1;
 637                 f->x_map = ((p[4] & 0x7e) << 8) |
 638                            ((p[1] & 0x7f) << 2) |
 639                            ((p[0] & 0x30) >> 4);
 640                 f->y_map = ((p[3] & 0x70) << 4) |
 641                            ((p[2] & 0x7f) << 1) |
 642                            (p[4] & 0x01);
 643         } else {
 644                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 645                        ((p[0] & 0x30) >> 4);
 646                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 647                 f->pressure = p[5] & 0x7f;
 648
 649                 alps_decode_buttons_v3(f, p);
 650         }
 651
 652         return 0;
 653 }
 654
 655 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 656                                  struct psmouse *psmouse)
 657 {
 658         f->first_mp = !!(p[4] & 0x40);
 659         f->is_mp = !!(p[5] & 0x40);
 660
 661         if (f->is_mp) {
 662                 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
 663                 f->x_map = ((p[5] & 0x10) << 11) |
 664                            ((p[4] & 0x7e) << 8) |
 665                            ((p[1] & 0x7f) << 2) |
 666                            ((p[0] & 0x30) >> 4);
 667                 f->y_map = ((p[5] & 0x20) << 6) |
 668                            ((p[3] & 0x70) << 4) |
 669                            ((p[2] & 0x7f) << 1) |
 670                            (p[4] & 0x01);
 671         } else {
 672                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 673                        ((p[0] & 0x30) >> 4);
 674                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 675                 f->pressure = p[5] & 0x7f;
 676
 677                 alps_decode_buttons_v3(f, p);
 678         }
 679
 680         return 0;
 681 }
 682
 683 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 684                                 struct psmouse *psmouse)
 685 {
 686         u64 palm_data = 0;
 687         struct alps_data *priv = psmouse->private;
 688
 689         f->first_mp = !!(p[0] & 0x02);
 690         f->is_mp = !!(p[0] & 0x20);
 691
 692         if (!f->is_mp) {
 693                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 694                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 695                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
 696                 alps_decode_buttons_v3(f, p);
 697         } else {
 698                 f->fingers = ((p[0] & 0x6) >> 1 |
 699                      (p[0] & 0x10) >> 2);
 700
 701                 palm_data = (p[1] & 0x7f) |
 702                             ((p[2] & 0x7f) << 7) |
 703                             ((p[4] & 0x7f) << 14) |
 704                             ((p[5] & 0x7f) << 21) |
 705                             ((p[3] & 0x07) << 28) |
 706                             (((u64)p[3] & 0x70) << 27) |
 707                             (((u64)p[0] & 0x01) << 34);
 708
 709                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
 710                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
 711
 712                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
 713                 f->x_map = (palm_data >> priv->y_bits) &
 714                            (BIT(priv->x_bits) - 1);
 715         }
 716
 717         return 0;
 718 }
 719
 720 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 721 {
 722         struct alps_data *priv = psmouse->private;
 723         unsigned char *packet = psmouse->packet;
 724         struct input_dev *dev2 = priv->dev2;
 725         struct alps_fields *f = &priv->f;
 726         int fingers = 0;
 727
 728         memset(f, 0, sizeof(*f));
 729
 730         priv->decode_fields(f, packet, psmouse);
 731
 732         /*
 733          * There's no single feature of touchpad position and bitmap packets
 734          * that can be used to distinguish between them. We rely on the fact
 735          * that a bitmap packet should always follow a position packet with
 736          * bit 6 of packet[4] set.
 737          */
 738         if (priv->multi_packet) {
 739                 /*
 740                  * Sometimes a position packet will indicate a multi-packet
 741                  * sequence, but then what follows is another position
 742                  * packet. Check for this, and when it happens process the
 743                  * position packet as usual.
 744                  */
 745                 if (f->is_mp) {
 746                         fingers = f->fingers;
 747                         /*
 748                          * Bitmap processing uses position packet's coordinate
 749                          * data, so we need to do decode it first.
 750                          */
 751                         priv->decode_fields(f, priv->multi_data, psmouse);
 752                         if (alps_process_bitmap(priv, f) == 0)
 753                                 fingers = 0; /* Use st data */
 754                 } else {
 755                         priv->multi_packet = 0;
 756                 }
 757         }
 758
 759         /*
 760          * Bit 6 of byte 0 is not usually set in position packets. The only
 761          * times it seems to be set is in situations where the data is
 762          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 763          * this combined with the fact that this bit is useful for filtering
 764          * out misidentified bitmap packets, we reject anything with this
 765          * bit set.
 766          */
 767         if (f->is_mp)
 768                 return;
 769
 770         if (!priv->multi_packet && f->first_mp) {
 771                 priv->multi_packet = 1;
 772                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 773                 return;
 774         }
 775
 776         priv->multi_packet = 0;
 777
 778         /*
 779          * Sometimes the hardware sends a single packet with z = 0
 780          * in the middle of a stream. Real releases generate packets
 781          * with x, y, and z all zero, so these seem to be flukes.
 782          * Ignore them.
 783          */
 784         if (f->st.x && f->st.y && !f->pressure)
 785                 return;
 786
 787         alps_report_semi_mt_data(psmouse, fingers);
 788
 789         if ((priv->flags & ALPS_DUALPOINT) &&
 790             !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 791                 input_report_key(dev2, BTN_LEFT, f->ts_left);
 792                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
 793                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
 794                 input_sync(dev2);
 795         }
 796 }
 797
 798 static void alps_process_packet_v3(struct psmouse *psmouse)
 799 {
 800         unsigned char *packet = psmouse->packet;
 801
 802         /*
 803          * v3 protocol packets come in three types, two representing
 804          * touchpad data and one representing trackstick data.
 805          * Trackstick packets seem to be distinguished by always
 806          * having 0x3f in the last byte. This value has never been
 807          * observed in the last byte of either of the other types
 808          * of packets.
 809          */
 810         if (packet[5] == 0x3f) {
 811                 alps_process_trackstick_packet_v3(psmouse);
 812                 return;
 813         }
 814
 815         alps_process_touchpad_packet_v3_v5(psmouse);
 816 }
 817
 818 static void alps_process_packet_v6(struct psmouse *psmouse)
 819 {
 820         struct alps_data *priv = psmouse->private;
 821         unsigned char *packet = psmouse->packet;
 822         struct input_dev *dev = psmouse->dev;
 823         struct input_dev *dev2 = priv->dev2;
 824         int x, y, z, left, right, middle;
 825
 826         /*
 827          * We can use Byte5 to distinguish if the packet is from Touchpad
 828          * or Trackpoint.
 829          * Touchpad:    0 - 0x7E
 830          * Trackpoint:  0x7F
 831          */
 832         if (packet[5] == 0x7F) {
 833                 /* It should be a DualPoint when received Trackpoint packet */
 834                 if (!(priv->flags & ALPS_DUALPOINT)) {
 835                         psmouse_warn(psmouse,
 836                                      "Rejected trackstick packet from non DualPoint device");
 837                         return;
 838                 }
 839
 840                 /* Trackpoint packet */
 841                 x = packet[1] | ((packet[3] & 0x20) << 2);
 842                 y = packet[2] | ((packet[3] & 0x40) << 1);
 843                 z = packet[4];
 844                 left = packet[3] & 0x01;
 845                 right = packet[3] & 0x02;
 846                 middle = packet[3] & 0x04;
 847
 848                 /* To prevent the cursor jump when finger lifted */
 849                 if (x == 0x7F && y == 0x7F && z == 0x7F)
 850                         x = y = z = 0;
 851
 852                 /* Divide 4 since trackpoint's speed is too fast */
 853                 input_report_rel(dev2, REL_X, (char)x / 4);
 854                 input_report_rel(dev2, REL_Y, -((char)y / 4));
 855
 856                 input_report_key(dev2, BTN_LEFT, left);
 857                 input_report_key(dev2, BTN_RIGHT, right);
 858                 input_report_key(dev2, BTN_MIDDLE, middle);
 859
 860                 input_sync(dev2);
 861                 return;
 862         }
 863
 864         /* Touchpad packet */
 865         x = packet[1] | ((packet[3] & 0x78) << 4);
 866         y = packet[2] | ((packet[4] & 0x78) << 4);
 867         z = packet[5];
 868         left = packet[3] & 0x01;
 869         right = packet[3] & 0x02;
 870
 871         if (z > 30)
 872                 input_report_key(dev, BTN_TOUCH, 1);
 873         if (z < 25)
 874                 input_report_key(dev, BTN_TOUCH, 0);
 875
 876         if (z > 0) {
 877                 input_report_abs(dev, ABS_X, x);
 878                 input_report_abs(dev, ABS_Y, y);
 879         }
 880
 881         input_report_abs(dev, ABS_PRESSURE, z);
 882         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 883
 884         /* v6 touchpad does not have middle button */
 885         input_report_key(dev, BTN_LEFT, left);
 886         input_report_key(dev, BTN_RIGHT, right);
 887
 888         input_sync(dev);
 889 }
 890
 891 static void alps_process_packet_v4(struct psmouse *psmouse)
 892 {
 893         struct alps_data *priv = psmouse->private;
 894         unsigned char *packet = psmouse->packet;
 895         struct alps_fields *f = &priv->f;
 896         int offset;
 897
 898         /*
 899          * v4 has a 6-byte encoding for bitmap data, but this data is
 900          * broken up between 3 normal packets. Use priv->multi_packet to
 901          * track our position in the bitmap packet.
 902          */
 903         if (packet[6] & 0x40) {
 904                 /* sync, reset position */
 905                 priv->multi_packet = 0;
 906         }
 907
 908         if (WARN_ON_ONCE(priv->multi_packet > 2))
 909                 return;
 910
 911         offset = 2 * priv->multi_packet;
 912         priv->multi_data[offset] = packet[6];
 913         priv->multi_data[offset + 1] = packet[7];
 914
 915         f->left = !!(packet[4] & 0x01);
 916         f->right = !!(packet[4] & 0x02);
 917
 918         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 919                   ((packet[0] & 0x30) >> 4);
 920         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 921         f->pressure = packet[5] & 0x7f;
 922
 923         if (++priv->multi_packet > 2) {
 924                 priv->multi_packet = 0;
 925
 926                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
 927                            ((priv->multi_data[3] & 0x60) << 3) |
 928                            ((priv->multi_data[0] & 0x3f) << 2) |
 929                            ((priv->multi_data[1] & 0x60) >> 5);
 930                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
 931                            ((priv->multi_data[3] & 0x1f) << 5) |
 932                             (priv->multi_data[1] & 0x1f);
 933
 934                 f->fingers = alps_process_bitmap(priv, f);
 935         }
 936
 937         alps_report_semi_mt_data(psmouse, f->fingers);
 938 }
 939
 940 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
 941 {
 942         switch (psmouse->pktcnt) {
 943         case 3:
 944                 return (psmouse->packet[2] & 0x40) == 0x40;
 945         case 4:
 946                 return (psmouse->packet[3] & 0x48) == 0x48;
 947         case 6:
 948                 return (psmouse->packet[5] & 0x40) == 0x00;
 949         }
 950         return true;
 951 }
 952
 953 static unsigned char alps_get_packet_id_v7(char *byte)
 954 {
 955         unsigned char packet_id;
 956
 957         if (byte[4] & 0x40)
 958                 packet_id = V7_PACKET_ID_TWO;
 959         else if (byte[4] & 0x01)
 960                 packet_id = V7_PACKET_ID_MULTI;
 961         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
 962                 packet_id = V7_PACKET_ID_NEW;
 963         else if (byte[1] == 0x00 && byte[4] == 0x00)
 964                 packet_id = V7_PACKET_ID_IDLE;
 965         else
 966                 packet_id = V7_PACKET_ID_UNKNOWN;
 967
 968         return packet_id;
 969 }
 970
 971 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
 972                                           unsigned char *pkt,
 973                                           unsigned char pkt_id)
 974 {
 975         mt[0].x = ((pkt[2] & 0x80) << 4);
 976         mt[0].x |= ((pkt[2] & 0x3F) << 5);
 977         mt[0].x |= ((pkt[3] & 0x30) >> 1);
 978         mt[0].x |= (pkt[3] & 0x07);
 979         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
 980
 981         mt[1].x = ((pkt[3] & 0x80) << 4);
 982         mt[1].x |= ((pkt[4] & 0x80) << 3);
 983         mt[1].x |= ((pkt[4] & 0x3F) << 4);
 984         mt[1].y = ((pkt[5] & 0x80) << 3);
 985         mt[1].y |= ((pkt[5] & 0x3F) << 4);
 986
 987         switch (pkt_id) {
 988         case V7_PACKET_ID_TWO:
 989                 mt[1].x &= ~0x000F;
 990                 mt[1].y |= 0x000F;
 991                 /* Detect false-postive touches where x & y report max value */
 992                 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
 993                         mt[1].x = 0;
 994                         /* y gets set to 0 at the end of this function */
 995                 }
 996                 break;
 997
 998         case V7_PACKET_ID_MULTI:
 999                 mt[1].x &= ~0x003F;
1000                 mt[1].y &= ~0x0020;
1001                 mt[1].y |= ((pkt[4] & 0x02) << 4);
1002                 mt[1].y |= 0x001F;
1003                 break;
1004
1005         case V7_PACKET_ID_NEW:
1006                 mt[1].x &= ~0x003F;
1007                 mt[1].x |= (pkt[0] & 0x20);
1008                 mt[1].y |= 0x000F;
1009                 break;
1010         }
1011
1012         mt[0].y = 0x7FF - mt[0].y;
1013         mt[1].y = 0x7FF - mt[1].y;
1014 }
1015
1016 static int alps_get_mt_count(struct input_mt_pos *mt)
1017 {
1018         int i, fingers = 0;
1019
1020         for (i = 0; i < MAX_TOUCHES; i++) {
1021                 if (mt[i].x != 0 || mt[i].y != 0)
1022                         fingers++;
1023         }
1024
1025         return fingers;
1026 }
1027
1028 static int alps_decode_packet_v7(struct alps_fields *f,
1029                                   unsigned char *p,
1030                                   struct psmouse *psmouse)
1031 {
1032         struct alps_data *priv = psmouse->private;
1033         unsigned char pkt_id;
1034
1035         pkt_id = alps_get_packet_id_v7(p);
1036         if (pkt_id == V7_PACKET_ID_IDLE)
1037                 return 0;
1038         if (pkt_id == V7_PACKET_ID_UNKNOWN)
1039                 return -1;
1040         /*
1041          * NEW packets are send to indicate a discontinuity in the finger
1042          * coordinate reporting. Specifically a finger may have moved from
1043          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
1044          * us.
1045          *
1046          * NEW packets have 3 problems:
1047          * 1) They do not contain middle / right button info (on non clickpads)
1048          *    this can be worked around by preserving the old button state
1049          * 2) They do not contain an accurate fingercount, and they are
1050          *    typically send when the number of fingers changes. We cannot use
1051          *    the old finger count as that may mismatch with the amount of
1052          *    touch coordinates we've available in the NEW packet
1053          * 3) Their x data for the second touch is inaccurate leading to
1054          *    a possible jump of the x coordinate by 16 units when the first
1055          *    non NEW packet comes in
1056          * Since problems 2 & 3 cannot be worked around, just ignore them.
1057          */
1058         if (pkt_id == V7_PACKET_ID_NEW)
1059                 return 1;
1060
1061         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1062
1063         if (pkt_id == V7_PACKET_ID_TWO)
1064                 f->fingers = alps_get_mt_count(f->mt);
1065         else /* pkt_id == V7_PACKET_ID_MULTI */
1066                 f->fingers = 3 + (p[5] & 0x03);
1067
1068         f->left = (p[0] & 0x80) >> 7;
1069         if (priv->flags & ALPS_BUTTONPAD) {
1070                 if (p[0] & 0x20)
1071                         f->fingers++;
1072                 if (p[0] & 0x10)
1073                         f->fingers++;
1074         } else {
1075                 f->right = (p[0] & 0x20) >> 5;
1076                 f->middle = (p[0] & 0x10) >> 4;
1077         }
1078
1079         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1080         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1081                 f->mt[0].x = f->mt[1].x;
1082                 f->mt[0].y = f->mt[1].y;
1083                 f->mt[1].x = 0;
1084                 f->mt[1].y = 0;
1085         }
1086
1087         return 0;
1088 }
1089
1090 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1091 {
1092         struct alps_data *priv = psmouse->private;
1093         unsigned char *packet = psmouse->packet;
1094         struct input_dev *dev2 = priv->dev2;
1095         int x, y, z, left, right, middle;
1096
1097         /* It should be a DualPoint when received trackstick packet */
1098         if (!(priv->flags & ALPS_DUALPOINT)) {
1099                 psmouse_warn(psmouse,
1100                              "Rejected trackstick packet from non DualPoint device");
1101                 return;
1102         }
1103
1104         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1105         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1106             ((packet[3] & 0x20) << 1);
1107         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1108
1109         left = (packet[1] & 0x01);
1110         right = (packet[1] & 0x02) >> 1;
1111         middle = (packet[1] & 0x04) >> 2;
1112
1113         input_report_rel(dev2, REL_X, (char)x);
1114         input_report_rel(dev2, REL_Y, -((char)y));
1115
1116         input_report_key(dev2, BTN_LEFT, left);
1117         input_report_key(dev2, BTN_RIGHT, right);
1118         input_report_key(dev2, BTN_MIDDLE, middle);
1119
1120         input_sync(dev2);
1121 }
1122
1123 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1124 {
1125         struct alps_data *priv = psmouse->private;
1126         struct input_dev *dev = psmouse->dev;
1127         struct alps_fields *f = &priv->f;
1128
1129         memset(f, 0, sizeof(*f));
1130
1131         if (priv->decode_fields(f, psmouse->packet, psmouse))
1132                 return;
1133
1134         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1135
1136         input_mt_report_finger_count(dev, f->fingers);
1137
1138         input_report_key(dev, BTN_LEFT, f->left);
1139         input_report_key(dev, BTN_RIGHT, f->right);
1140         input_report_key(dev, BTN_MIDDLE, f->middle);
1141
1142         input_sync(dev);
1143 }
1144
1145 static void alps_process_packet_v7(struct psmouse *psmouse)
1146 {
1147         unsigned char *packet = psmouse->packet;
1148
1149         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1150                 alps_process_trackstick_packet_v7(psmouse);
1151         else
1152                 alps_process_touchpad_packet_v7(psmouse);
1153 }
1154
1155 static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)
1156 {
1157         unsigned char pkt_id = SS4_PACKET_ID_IDLE;
1158
1159         if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&
1160             (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) {
1161                 pkt_id = SS4_PACKET_ID_IDLE;
1162         } else if (!(byte[3] & 0x10)) {
1163                 pkt_id = SS4_PACKET_ID_ONE;
1164         } else if (!(byte[3] & 0x20)) {
1165                 pkt_id = SS4_PACKET_ID_TWO;
1166         } else {
1167                 pkt_id = SS4_PACKET_ID_MULTI;
1168         }
1169
1170         return pkt_id;
1171 }
1172
1173 static int alps_decode_ss4_v2(struct alps_fields *f,
1174                               unsigned char *p, struct psmouse *psmouse)
1175 {
1176         struct alps_data *priv = psmouse->private;
1177         unsigned char pkt_id;
1178         unsigned int no_data_x, no_data_y;
1179
1180         pkt_id = alps_get_pkt_id_ss4_v2(p);
1181
1182         /* Current packet is 1Finger coordinate packet */
1183         switch (pkt_id) {
1184         case SS4_PACKET_ID_ONE:
1185                 f->mt[0].x = SS4_1F_X_V2(p);
1186                 f->mt[0].y = SS4_1F_Y_V2(p);
1187                 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1188                 f->fingers = 1;
1189                 f->first_mp = 0;
1190                 f->is_mp = 0;
1191                 break;
1192
1193         case SS4_PACKET_ID_TWO:
1194                 if (priv->flags & ALPS_BUTTONPAD) {
1195                         f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1196                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1197                         f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1198                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1199                 } else {
1200                         f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1201                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1202                         f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1203                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1204                 }
1205                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1206
1207                 if (SS4_IS_MF_CONTINUE(p)) {
1208                         f->first_mp = 1;
1209                 } else {
1210                         f->fingers = 2;
1211                         f->first_mp = 0;
1212                 }
1213                 f->is_mp = 0;
1214
1215                 break;
1216
1217         case SS4_PACKET_ID_MULTI:
1218                 if (priv->flags & ALPS_BUTTONPAD) {
1219                         f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1220                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1221                         f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1222                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1223                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1224                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1225                 } else {
1226                         f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1227                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1228                         f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1229                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1230                         no_data_x = SS4_MFPACKET_NO_AX;
1231                         no_data_y = SS4_MFPACKET_NO_AY;
1232                 }
1233
1234                 f->first_mp = 0;
1235                 f->is_mp = 1;
1236
1237                 if (SS4_IS_5F_DETECTED(p)) {
1238                         f->fingers = 5;
1239                 } else if (f->mt[3].x == no_data_x &&
1240                              f->mt[3].y == no_data_y) {
1241                         f->mt[3].x = 0;
1242                         f->mt[3].y = 0;
1243                         f->fingers = 3;
1244                 } else {
1245                         f->fingers = 4;
1246                 }
1247                 break;
1248
1249         case SS4_PACKET_ID_IDLE:
1250         default:
1251                 memset(f, 0, sizeof(struct alps_fields));
1252                 break;
1253         }
1254
1255         f->left = !!(SS4_BTN_V2(p) & 0x01);
1256         if (!(priv->flags & ALPS_BUTTONPAD)) {
1257                 f->right = !!(SS4_BTN_V2(p) & 0x02);
1258                 f->middle = !!(SS4_BTN_V2(p) & 0x04);
1259         }
1260
1261         return 0;
1262 }
1263
1264 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1265 {
1266         struct alps_data *priv = psmouse->private;
1267         unsigned char *packet = psmouse->packet;
1268         struct input_dev *dev = psmouse->dev;
1269         struct alps_fields *f = &priv->f;
1270
1271         memset(f, 0, sizeof(struct alps_fields));
1272         priv->decode_fields(f, packet, psmouse);
1273         if (priv->multi_packet) {
1274                 /*
1275                  * Sometimes the first packet will indicate a multi-packet
1276                  * sequence, but sometimes the next multi-packet would not
1277                  * come. Check for this, and when it happens process the
1278                  * position packet as usual.
1279                  */
1280                 if (f->is_mp) {
1281                         /* Now process the 1st packet */
1282                         priv->decode_fields(f, priv->multi_data, psmouse);
1283                 } else {
1284                         priv->multi_packet = 0;
1285                 }
1286         }
1287
1288         /*
1289          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1290          * When it is set, it means 2nd packet comes without 1st packet come.
1291          */
1292         if (f->is_mp)
1293                 return;
1294
1295         /* Save the first packet */
1296         if (!priv->multi_packet && f->first_mp) {
1297                 priv->multi_packet = 1;
1298                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1299                 return;
1300         }
1301
1302         priv->multi_packet = 0;
1303
1304         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1305
1306         input_mt_report_finger_count(dev, f->fingers);
1307
1308         input_report_key(dev, BTN_LEFT, f->left);
1309         input_report_key(dev, BTN_RIGHT, f->right);
1310         input_report_key(dev, BTN_MIDDLE, f->middle);
1311
1312         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1313         input_sync(dev);
1314 }
1315
1316 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1317 {
1318         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1319                 return false;
1320         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1321                 return false;
1322         return true;
1323 }
1324
1325 static DEFINE_MUTEX(alps_mutex);
1326
1327 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1328 {
1329         struct alps_data *priv =
1330                 container_of(work, struct alps_data, dev3_register_work.work);
1331         struct psmouse *psmouse = priv->psmouse;
1332         struct input_dev *dev3;
1333         int error = 0;
1334
1335         mutex_lock(&alps_mutex);
1336
1337         if (priv->dev3)
1338                 goto out;
1339
1340         dev3 = input_allocate_device();
1341         if (!dev3) {
1342                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1343                 error = -ENOMEM;
1344                 goto out;
1345         }
1346
1347         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1348                  psmouse->ps2dev.serio->phys,
1349                  (priv->dev2 ? "input2" : "input1"));
1350         dev3->phys = priv->phys3;
1351
1352         /*
1353          * format of input device name is: "protocol vendor name"
1354          * see function psmouse_switch_protocol() in psmouse-base.c
1355          */
1356         dev3->name = "PS/2 ALPS Mouse";
1357
1358         dev3->id.bustype = BUS_I8042;
1359         dev3->id.vendor  = 0x0002;
1360         dev3->id.product = PSMOUSE_PS2;
1361         dev3->id.version = 0x0000;
1362         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1363
1364         input_set_capability(dev3, EV_REL, REL_X);
1365         input_set_capability(dev3, EV_REL, REL_Y);
1366         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1367         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1368         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1369
1370         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1371
1372         error = input_register_device(dev3);
1373         if (error) {
1374                 psmouse_err(psmouse,
1375                             "failed to register secondary device: %d\n",
1376                             error);
1377                 input_free_device(dev3);
1378                 goto out;
1379         }
1380
1381         priv->dev3 = dev3;
1382
1383 out:
1384         /*
1385          * Save the error code so that we can detect that we
1386          * already tried to create the device.
1387          */
1388         if (error)
1389                 priv->dev3 = ERR_PTR(error);
1390
1391         mutex_unlock(&alps_mutex);
1392 }
1393
1394 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1395                                         unsigned char packet[],
1396                                         bool report_buttons)
1397 {
1398         struct alps_data *priv = psmouse->private;
1399         struct input_dev *dev, *dev2 = NULL;
1400
1401         /* Figure out which device to use to report the bare packet */
1402         if (priv->proto_version == ALPS_PROTO_V2 &&
1403             (priv->flags & ALPS_DUALPOINT)) {
1404                 /* On V2 devices the DualPoint Stick reports bare packets */
1405                 dev = priv->dev2;
1406                 dev2 = psmouse->dev;
1407         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1408                 /* Register dev3 mouse if we received PS/2 packet first time */
1409                 if (!IS_ERR(priv->dev3))
1410                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1411                                            0);
1412                 return;
1413         } else {
1414                 dev = priv->dev3;
1415         }
1416
1417         if (report_buttons)
1418                 alps_report_buttons(dev, dev2,
1419                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1420
1421         input_report_rel(dev, REL_X,
1422                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1423         input_report_rel(dev, REL_Y,
1424                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1425
1426         input_sync(dev);
1427 }
1428
1429 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1430 {
1431         struct alps_data *priv = psmouse->private;
1432
1433         if (psmouse->pktcnt < 6)
1434                 return PSMOUSE_GOOD_DATA;
1435
1436         if (psmouse->pktcnt == 6) {
1437                 /*
1438                  * Start a timer to flush the packet if it ends up last
1439                  * 6-byte packet in the stream. Timer needs to fire
1440                  * psmouse core times out itself. 20 ms should be enough
1441                  * to decide if we are getting more data or not.
1442                  */
1443                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1444                 return PSMOUSE_GOOD_DATA;
1445         }
1446
1447         del_timer(&priv->timer);
1448
1449         if (psmouse->packet[6] & 0x80) {
1450
1451                 /*
1452                  * Highest bit is set - that means we either had
1453                  * complete ALPS packet and this is start of the
1454                  * next packet or we got garbage.
1455                  */
1456
1457                 if (((psmouse->packet[3] |
1458                       psmouse->packet[4] |
1459                       psmouse->packet[5]) & 0x80) ||
1460                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1461                         psmouse_dbg(psmouse,
1462                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1463                                     psmouse->packet + 3);
1464                         return PSMOUSE_BAD_DATA;
1465                 }
1466
1467                 priv->process_packet(psmouse);
1468
1469                 /* Continue with the next packet */
1470                 psmouse->packet[0] = psmouse->packet[6];
1471                 psmouse->pktcnt = 1;
1472
1473         } else {
1474
1475                 /*
1476                  * High bit is 0 - that means that we indeed got a PS/2
1477                  * packet in the middle of ALPS packet.
1478                  *
1479                  * There is also possibility that we got 6-byte ALPS
1480                  * packet followed  by 3-byte packet from trackpoint. We
1481                  * can not distinguish between these 2 scenarios but
1482                  * because the latter is unlikely to happen in course of
1483                  * normal operation (user would need to press all
1484                  * buttons on the pad and start moving trackpoint
1485                  * without touching the pad surface) we assume former.
1486                  * Even if we are wrong the wost thing that would happen
1487                  * the cursor would jump but we should not get protocol
1488                  * de-synchronization.
1489                  */
1490
1491                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1492                                             false);
1493
1494                 /*
1495                  * Continue with the standard ALPS protocol handling,
1496                  * but make sure we won't process it as an interleaved
1497                  * packet again, which may happen if all buttons are
1498                  * pressed. To avoid this let's reset the 4th bit which
1499                  * is normally 1.
1500                  */
1501                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1502                 psmouse->pktcnt = 4;
1503         }
1504
1505         return PSMOUSE_GOOD_DATA;
1506 }
1507
1508 static void alps_flush_packet(unsigned long data)
1509 {
1510         struct psmouse *psmouse = (struct psmouse *)data;
1511         struct alps_data *priv = psmouse->private;
1512
1513         serio_pause_rx(psmouse->ps2dev.serio);
1514
1515         if (psmouse->pktcnt == psmouse->pktsize) {
1516
1517                 /*
1518                  * We did not any more data in reasonable amount of time.
1519                  * Validate the last 3 bytes and process as a standard
1520                  * ALPS packet.
1521                  */
1522                 if ((psmouse->packet[3] |
1523                      psmouse->packet[4] |
1524                      psmouse->packet[5]) & 0x80) {
1525                         psmouse_dbg(psmouse,
1526                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1527                                     psmouse->packet + 3);
1528                 } else {
1529                         priv->process_packet(psmouse);
1530                 }
1531                 psmouse->pktcnt = 0;
1532         }
1533
1534         serio_continue_rx(psmouse->ps2dev.serio);
1535 }
1536
1537 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1538 {
1539         struct alps_data *priv = psmouse->private;
1540
1541         /*
1542          * Check if we are dealing with a bare PS/2 packet, presumably from
1543          * a device connected to the external PS/2 port. Because bare PS/2
1544          * protocol does not have enough constant bits to self-synchronize
1545          * properly we only do this if the device is fully synchronized.
1546          * Can not distinguish V8's first byte from PS/2 packet's
1547          */
1548         if (priv->proto_version != ALPS_PROTO_V8 &&
1549             !psmouse->out_of_sync_cnt &&
1550             (psmouse->packet[0] & 0xc8) == 0x08) {
1551
1552                 if (psmouse->pktcnt == 3) {
1553                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1554                                                     true);
1555                         return PSMOUSE_FULL_PACKET;
1556                 }
1557                 return PSMOUSE_GOOD_DATA;
1558         }
1559
1560         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1561
1562         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1563             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1564                 return alps_handle_interleaved_ps2(psmouse);
1565         }
1566
1567         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1568                 psmouse_dbg(psmouse,
1569                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1570                             psmouse->packet[0], priv->mask0, priv->byte0);
1571                 return PSMOUSE_BAD_DATA;
1572         }
1573
1574         /* Bytes 2 - pktsize should have 0 in the highest bit */
1575         if (priv->proto_version < ALPS_PROTO_V5 &&
1576             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1577             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1578                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1579                             psmouse->pktcnt - 1,
1580                             psmouse->packet[psmouse->pktcnt - 1]);
1581
1582                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1583                     psmouse->pktcnt == psmouse->pktsize) {
1584                         /*
1585                          * Some Dell boxes, such as Latitude E6440 or E7440
1586                          * with closed lid, quite often smash last byte of
1587                          * otherwise valid packet with 0xff. Given that the
1588                          * next packet is very likely to be valid let's
1589                          * report PSMOUSE_FULL_PACKET but not process data,
1590                          * rather than reporting PSMOUSE_BAD_DATA and
1591                          * filling the logs.
1592                          */
1593                         return PSMOUSE_FULL_PACKET;
1594                 }
1595
1596                 return PSMOUSE_BAD_DATA;
1597         }
1598
1599         if ((priv->proto_version == ALPS_PROTO_V7 &&
1600                         !alps_is_valid_package_v7(psmouse)) ||
1601             (priv->proto_version == ALPS_PROTO_V8 &&
1602                         !alps_is_valid_package_ss4_v2(psmouse))) {
1603                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1604                             psmouse->pktcnt - 1,
1605                             psmouse->packet[psmouse->pktcnt - 1]);
1606                 return PSMOUSE_BAD_DATA;
1607         }
1608
1609         if (psmouse->pktcnt == psmouse->pktsize) {
1610                 priv->process_packet(psmouse);
1611                 return PSMOUSE_FULL_PACKET;
1612         }
1613
1614         return PSMOUSE_GOOD_DATA;
1615 }
1616
1617 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1618 {
1619         struct ps2dev *ps2dev = &psmouse->ps2dev;
1620         struct alps_data *priv = psmouse->private;
1621         int command;
1622         unsigned char *param;
1623         unsigned char dummy[4];
1624
1625         BUG_ON(nibble > 0xf);
1626
1627         command = priv->nibble_commands[nibble].command;
1628         param = (command & 0x0f00) ?
1629                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1630
1631         if (ps2_command(ps2dev, param, command))
1632                 return -1;
1633
1634         return 0;
1635 }
1636
1637 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1638 {
1639         struct ps2dev *ps2dev = &psmouse->ps2dev;
1640         struct alps_data *priv = psmouse->private;
1641         int i, nibble;
1642
1643         if (ps2_command(ps2dev, NULL, priv->addr_command))
1644                 return -1;
1645
1646         for (i = 12; i >= 0; i -= 4) {
1647                 nibble = (addr >> i) & 0xf;
1648                 if (alps_command_mode_send_nibble(psmouse, nibble))
1649                         return -1;
1650         }
1651
1652         return 0;
1653 }
1654
1655 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1656 {
1657         struct ps2dev *ps2dev = &psmouse->ps2dev;
1658         unsigned char param[4];
1659
1660         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1661                 return -1;
1662
1663         /*
1664          * The address being read is returned in the first two bytes
1665          * of the result. Check that this address matches the expected
1666          * address.
1667          */
1668         if (addr != ((param[0] << 8) | param[1]))
1669                 return -1;
1670
1671         return param[2];
1672 }
1673
1674 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1675 {
1676         if (alps_command_mode_set_addr(psmouse, addr))
1677                 return -1;
1678         return __alps_command_mode_read_reg(psmouse, addr);
1679 }
1680
1681 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1682 {
1683         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1684                 return -1;
1685         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1686                 return -1;
1687         return 0;
1688 }
1689
1690 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1691                                        u8 value)
1692 {
1693         if (alps_command_mode_set_addr(psmouse, addr))
1694                 return -1;
1695         return __alps_command_mode_write_reg(psmouse, value);
1696 }
1697
1698 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1699                         int repeated_command, unsigned char *param)
1700 {
1701         struct ps2dev *ps2dev = &psmouse->ps2dev;
1702
1703         param[0] = 0;
1704         if (init_command && ps2_command(ps2dev, param, init_command))
1705                 return -EIO;
1706
1707         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1708             ps2_command(ps2dev,  NULL, repeated_command) ||
1709             ps2_command(ps2dev,  NULL, repeated_command))
1710                 return -EIO;
1711
1712         param[0] = param[1] = param[2] = 0xff;
1713         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1714                 return -EIO;
1715
1716         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1717                     repeated_command, param);
1718         return 0;
1719 }
1720
1721 static bool alps_check_valid_firmware_id(unsigned char id[])
1722 {
1723         if (id[0] == 0x73)
1724                 return true;
1725
1726         if (id[0] == 0x88 &&
1727             (id[1] == 0x07 ||
1728              id[1] == 0x08 ||
1729              (id[1] & 0xf0) == 0xb0 ||
1730              (id[1] & 0xf0) == 0xc0)) {
1731                 return true;
1732         }
1733
1734         return false;
1735 }
1736
1737 static int alps_enter_command_mode(struct psmouse *psmouse)
1738 {
1739         unsigned char param[4];
1740
1741         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1742                 psmouse_err(psmouse, "failed to enter command mode\n");
1743                 return -1;
1744         }
1745
1746         if (!alps_check_valid_firmware_id(param)) {
1747                 psmouse_dbg(psmouse,
1748                             "unknown response while entering command mode\n");
1749                 return -1;
1750         }
1751         return 0;
1752 }
1753
1754 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1755 {
1756         struct ps2dev *ps2dev = &psmouse->ps2dev;
1757         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1758                 return -1;
1759         return 0;
1760 }
1761
1762 /*
1763  * For DualPoint devices select the device that should respond to
1764  * subsequent commands. It looks like glidepad is behind stickpointer,
1765  * I'd thought it would be other way around...
1766  */
1767 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1768 {
1769         struct ps2dev *ps2dev = &psmouse->ps2dev;
1770         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1771
1772         if (ps2_command(ps2dev, NULL, cmd) ||
1773             ps2_command(ps2dev, NULL, cmd) ||
1774             ps2_command(ps2dev, NULL, cmd) ||
1775             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1776                 return -1;
1777
1778         /* we may get 3 more bytes, just ignore them */
1779         ps2_drain(ps2dev, 3, 100);
1780
1781         return 0;
1782 }
1783
1784 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1785 {
1786         struct ps2dev *ps2dev = &psmouse->ps2dev;
1787
1788         /* Try ALPS magic knock - 4 disable before enable */
1789         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1790             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1791             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1792             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1793             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1794                 return -1;
1795
1796         /*
1797          * Switch mouse to poll (remote) mode so motion data will not
1798          * get in our way
1799          */
1800         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1801 }
1802
1803 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1804 {
1805         int i, nibble;
1806
1807         /*
1808          * b0-b11 are valid bits, send sequence is inverse.
1809          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1810          */
1811         for (i = 0; i <= 8; i += 4) {
1812                 nibble = (word >> i) & 0xf;
1813                 if (alps_command_mode_send_nibble(psmouse, nibble))
1814                         return -1;
1815         }
1816
1817         return 0;
1818 }
1819
1820 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1821                                        u16 addr, u16 value)
1822 {
1823         struct ps2dev *ps2dev = &psmouse->ps2dev;
1824
1825         /* 0x0A0 is the command to write the word */
1826         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1827             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1828             alps_monitor_mode_send_word(psmouse, addr) ||
1829             alps_monitor_mode_send_word(psmouse, value) ||
1830             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1831                 return -1;
1832
1833         return 0;
1834 }
1835
1836 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1837 {
1838         struct ps2dev *ps2dev = &psmouse->ps2dev;
1839
1840         if (enable) {
1841                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1842                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1843                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1844                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1845                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1846                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1847                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1848                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1849                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1850                         return -1;
1851         } else {
1852                 /* EC to exit monitor mode */
1853                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1854                         return -1;
1855         }
1856
1857         return 0;
1858 }
1859
1860 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1861 {
1862         u16 reg_val = 0x181;
1863         int ret = -1;
1864
1865         /* enter monitor mode, to write the register */
1866         if (alps_monitor_mode(psmouse, true))
1867                 return -1;
1868
1869         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1870
1871         if (alps_monitor_mode(psmouse, false))
1872                 ret = -1;
1873
1874         return ret;
1875 }
1876
1877 static int alps_get_status(struct psmouse *psmouse, char *param)
1878 {
1879         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1880         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1881                 return -1;
1882
1883         return 0;
1884 }
1885
1886 /*
1887  * Turn touchpad tapping on or off. The sequences are:
1888  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1889  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1890  * My guess that 0xE9 (GetInfo) is here as a sync point.
1891  * For models that also have stickpointer (DualPoints) its tapping
1892  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1893  * we don't fiddle with it.
1894  */
1895 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1896 {
1897         struct ps2dev *ps2dev = &psmouse->ps2dev;
1898         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1899         unsigned char tap_arg = enable ? 0x0A : 0x00;
1900         unsigned char param[4];
1901
1902         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1903             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1904             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1905             ps2_command(ps2dev, &tap_arg, cmd))
1906                 return -1;
1907
1908         if (alps_get_status(psmouse, param))
1909                 return -1;
1910
1911         return 0;
1912 }
1913
1914 /*
1915  * alps_poll() - poll the touchpad for current motion packet.
1916  * Used in resync.
1917  */
1918 static int alps_poll(struct psmouse *psmouse)
1919 {
1920         struct alps_data *priv = psmouse->private;
1921         unsigned char buf[sizeof(psmouse->packet)];
1922         bool poll_failed;
1923
1924         if (priv->flags & ALPS_PASS)
1925                 alps_passthrough_mode_v2(psmouse, true);
1926
1927         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1928                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1929
1930         if (priv->flags & ALPS_PASS)
1931                 alps_passthrough_mode_v2(psmouse, false);
1932
1933         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1934                 return -1;
1935
1936         if ((psmouse->badbyte & 0xc8) == 0x08) {
1937 /*
1938  * Poll the track stick ...
1939  */
1940                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1941                         return -1;
1942         }
1943
1944         memcpy(psmouse->packet, buf, sizeof(buf));
1945         return 0;
1946 }
1947
1948 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1949 {
1950         struct alps_data *priv = psmouse->private;
1951
1952         if ((priv->flags & ALPS_PASS) &&
1953             alps_passthrough_mode_v2(psmouse, true)) {
1954                 return -1;
1955         }
1956
1957         if (alps_tap_mode(psmouse, true)) {
1958                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1959                 return -1;
1960         }
1961
1962         if (alps_absolute_mode_v1_v2(psmouse)) {
1963                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1964                 return -1;
1965         }
1966
1967         if ((priv->flags & ALPS_PASS) &&
1968             alps_passthrough_mode_v2(psmouse, false)) {
1969                 return -1;
1970         }
1971
1972         /* ALPS needs stream mode, otherwise it won't report any data */
1973         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1974                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1975                 return -1;
1976         }
1977
1978         return 0;
1979 }
1980
1981 static int alps_hw_init_v6(struct psmouse *psmouse)
1982 {
1983         unsigned char param[2] = {0xC8, 0x14};
1984
1985         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1986         if (alps_passthrough_mode_v2(psmouse, true))
1987                 return -1;
1988
1989         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1990             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1991             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1992             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1993             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1994                 return -1;
1995
1996         if (alps_passthrough_mode_v2(psmouse, false))
1997                 return -1;
1998
1999         if (alps_absolute_mode_v6(psmouse)) {
2000                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2001                 return -1;
2002         }
2003
2004         return 0;
2005 }
2006
2007 /*
2008  * Enable or disable passthrough mode to the trackstick.
2009  */
2010 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
2011                                     int reg_base, bool enable)
2012 {
2013         int reg_val, ret = -1;
2014
2015         if (alps_enter_command_mode(psmouse))
2016                 return -1;
2017
2018         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
2019         if (reg_val == -1)
2020                 goto error;
2021
2022         if (enable)
2023                 reg_val |= 0x01;
2024         else
2025                 reg_val &= ~0x01;
2026
2027         ret = __alps_command_mode_write_reg(psmouse, reg_val);
2028
2029 error:
2030         if (alps_exit_command_mode(psmouse))
2031                 ret = -1;
2032         return ret;
2033 }
2034
2035 /* Must be in command mode when calling this function */
2036 static int alps_absolute_mode_v3(struct psmouse *psmouse)
2037 {
2038         int reg_val;
2039
2040         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2041         if (reg_val == -1)
2042                 return -1;
2043
2044         reg_val |= 0x06;
2045         if (__alps_command_mode_write_reg(psmouse, reg_val))
2046                 return -1;
2047
2048         return 0;
2049 }
2050
2051 static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base)
2052 {
2053         int ret = -EIO, reg_val;
2054
2055         if (alps_enter_command_mode(psmouse))
2056                 goto error;
2057
2058         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2059         if (reg_val == -1)
2060                 goto error;
2061
2062         /* bit 7: trackstick is present */
2063         ret = reg_val & 0x80 ? 0 : -ENODEV;
2064
2065 error:
2066         alps_exit_command_mode(psmouse);
2067         return ret;
2068 }
2069
2070 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2071 {
2072         struct ps2dev *ps2dev = &psmouse->ps2dev;
2073         int ret = 0;
2074         unsigned char param[4];
2075
2076         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2077                 return -EIO;
2078
2079         /*
2080          * E7 report for the trackstick
2081          *
2082          * There have been reports of failures to seem to trace back
2083          * to the above trackstick check failing. When these occur
2084          * this E7 report fails, so when that happens we continue
2085          * with the assumption that there isn't a trackstick after
2086          * all.
2087          */
2088         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2089                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2090                 ret = -ENODEV;
2091         } else {
2092                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2093
2094                 /*
2095                  * Not sure what this does, but it is absolutely
2096                  * essential. Without it, the touchpad does not
2097                  * work at all and the trackstick just emits normal
2098                  * PS/2 packets.
2099                  */
2100                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2101                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2102                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2103                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2104                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2105                         psmouse_err(psmouse,
2106                                     "Error sending magic E6 sequence\n");
2107                         ret = -EIO;
2108                         goto error;
2109                 }
2110
2111                 /*
2112                  * This ensures the trackstick packets are in the format
2113                  * supported by this driver. If bit 1 isn't set the packet
2114                  * format is different.
2115                  */
2116                 if (alps_enter_command_mode(psmouse) ||
2117                     alps_command_mode_write_reg(psmouse,
2118                                                 reg_base + 0x08, 0x82) ||
2119                     alps_exit_command_mode(psmouse))
2120                         ret = -EIO;
2121         }
2122
2123 error:
2124         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2125                 ret = -EIO;
2126
2127         return ret;
2128 }
2129
2130 static int alps_hw_init_v3(struct psmouse *psmouse)
2131 {
2132         struct alps_data *priv = psmouse->private;
2133         struct ps2dev *ps2dev = &psmouse->ps2dev;
2134         int reg_val;
2135         unsigned char param[4];
2136
2137         if ((priv->flags & ALPS_DUALPOINT) &&
2138             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2139                 goto error;
2140
2141         if (alps_enter_command_mode(psmouse) ||
2142             alps_absolute_mode_v3(psmouse)) {
2143                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2144                 goto error;
2145         }
2146
2147         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2148         if (reg_val == -1)
2149                 goto error;
2150         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2151                 goto error;
2152
2153         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2154         if (reg_val == -1)
2155                 goto error;
2156         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2157                 goto error;
2158
2159         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2160                 goto error;
2161         if (__alps_command_mode_write_reg(psmouse, 0x04))
2162                 goto error;
2163
2164         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2165                 goto error;
2166         if (__alps_command_mode_write_reg(psmouse, 0x03))
2167                 goto error;
2168
2169         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2170                 goto error;
2171         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2172                 goto error;
2173
2174         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2175                 goto error;
2176         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2177                 goto error;
2178
2179         alps_exit_command_mode(psmouse);
2180
2181         /* Set rate and enable data reporting */
2182         param[0] = 0x64;
2183         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2184             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2185                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2186                 return -1;
2187         }
2188
2189         return 0;
2190
2191 error:
2192         /*
2193          * Leaving the touchpad in command mode will essentially render
2194          * it unusable until the machine reboots, so exit it here just
2195          * to be safe
2196          */
2197         alps_exit_command_mode(psmouse);
2198         return -1;
2199 }
2200
2201 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2202 {
2203         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2204         struct alps_data *priv = psmouse->private;
2205
2206         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2207         if (reg < 0)
2208                 return reg;
2209
2210         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2211         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2212
2213         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2214         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2215
2216         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2217         if (reg < 0)
2218                 return reg;
2219
2220         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2221         x_electrode = 17 + x_electrode;
2222
2223         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2224         y_electrode = 13 + y_electrode;
2225
2226         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2227         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2228
2229         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2230         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2231
2232         psmouse_dbg(psmouse,
2233                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2234                     x_pitch, y_pitch, x_electrode, y_electrode,
2235                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2236
2237         return 0;
2238 }
2239
2240 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2241 {
2242         struct alps_data *priv = psmouse->private;
2243         struct ps2dev *ps2dev = &psmouse->ps2dev;
2244         int reg_val, ret = -1;
2245
2246         if (priv->flags & ALPS_DUALPOINT) {
2247                 reg_val = alps_setup_trackstick_v3(psmouse,
2248                                                    ALPS_REG_BASE_RUSHMORE);
2249                 if (reg_val == -EIO)
2250                         goto error;
2251         }
2252
2253         if (alps_enter_command_mode(psmouse) ||
2254             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2255             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2256                 goto error;
2257
2258         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2259                 goto error;
2260
2261         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2262         if (reg_val == -1)
2263                 goto error;
2264         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2265                 goto error;
2266
2267         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2268                 goto error;
2269
2270         /* enter absolute mode */
2271         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2272         if (reg_val == -1)
2273                 goto error;
2274         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2275                 goto error;
2276
2277         alps_exit_command_mode(psmouse);
2278         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2279
2280 error:
2281         alps_exit_command_mode(psmouse);
2282         return ret;
2283 }
2284
2285 /* Must be in command mode when calling this function */
2286 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2287 {
2288         int reg_val;
2289
2290         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2291         if (reg_val == -1)
2292                 return -1;
2293
2294         reg_val |= 0x02;
2295         if (__alps_command_mode_write_reg(psmouse, reg_val))
2296                 return -1;
2297
2298         return 0;
2299 }
2300
2301 static int alps_hw_init_v4(struct psmouse *psmouse)
2302 {
2303         struct ps2dev *ps2dev = &psmouse->ps2dev;
2304         unsigned char param[4];
2305
2306         if (alps_enter_command_mode(psmouse))
2307                 goto error;
2308
2309         if (alps_absolute_mode_v4(psmouse)) {
2310                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2311                 goto error;
2312         }
2313
2314         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2315                 goto error;
2316
2317         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2318                 goto error;
2319
2320         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2321                 goto error;
2322
2323         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2324                 goto error;
2325
2326         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2327                 goto error;
2328
2329         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2330                 goto error;
2331
2332         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2333                 goto error;
2334
2335         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2336                 goto error;
2337
2338         alps_exit_command_mode(psmouse);
2339
2340         /*
2341          * This sequence changes the output from a 9-byte to an
2342          * 8-byte format. All the same data seems to be present,
2343          * just in a more compact format.
2344          */
2345         param[0] = 0xc8;
2346         param[1] = 0x64;
2347         param[2] = 0x50;
2348         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2349             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2350             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2351             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2352                 return -1;
2353
2354         /* Set rate and enable data reporting */
2355         param[0] = 0x64;
2356         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2357             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2358                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2359                 return -1;
2360         }
2361
2362         return 0;
2363
2364 error:
2365         /*
2366          * Leaving the touchpad in command mode will essentially render
2367          * it unusable until the machine reboots, so exit it here just
2368          * to be safe
2369          */
2370         alps_exit_command_mode(psmouse);
2371         return -1;
2372 }
2373
2374 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2375                                       unsigned char index, unsigned char otp[])
2376 {
2377         struct ps2dev *ps2dev = &psmouse->ps2dev;
2378
2379         switch (index) {
2380         case 0:
2381                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2382                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2383                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2384                         return -1;
2385
2386                 break;
2387
2388         case 1:
2389                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2390                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2391                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2392                         return -1;
2393
2394                 break;
2395         }
2396
2397         return 0;
2398 }
2399
2400 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2401                                           struct alps_data *priv)
2402 {
2403         int num_x_electrode;
2404         int num_y_electrode;
2405         int x_pitch, y_pitch, x_phys, y_phys;
2406
2407         num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2408         num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2409
2410         priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2411         priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2412
2413         x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2414         y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2415
2416         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2417         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2418
2419         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2420         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2421
2422         return 0;
2423 }
2424
2425 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2426                                        struct alps_data *priv)
2427 {
2428         unsigned char is_btnless;
2429
2430         is_btnless = (otp[1][1] >> 3) & 0x01;
2431
2432         if (is_btnless)
2433                 priv->flags |= ALPS_BUTTONPAD;
2434
2435         return 0;
2436 }
2437
2438 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2439                                     struct alps_data *priv)
2440 {
2441         unsigned char otp[2][4];
2442
2443         memset(otp, 0, sizeof(otp));
2444
2445         if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2446             alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2447                 return -1;
2448
2449         alps_update_device_area_ss4_v2(otp, priv);
2450
2451         alps_update_btn_info_ss4_v2(otp, priv);
2452
2453         return 0;
2454 }
2455
2456 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2457                                         struct alps_data *priv)
2458 {
2459         struct ps2dev *ps2dev = &psmouse->ps2dev;
2460         unsigned char param[4] = {0};
2461         int num_x_electrode, num_y_electrode;
2462
2463         if (alps_enter_command_mode(psmouse))
2464                 return -1;
2465
2466         param[0] = 0x0a;
2467         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2468             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2469             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2470             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2471             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2472                 return -1;
2473
2474         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2475                 return -1;
2476
2477         /*
2478          * Dolphin's sensor line number is not fixed. It can be calculated
2479          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2480          * Further more, we can get device's x_max and y_max by multiplying
2481          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2482          *
2483          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2484          *      real sensor line number X = 11 + 8 = 19, and
2485          *      real sensor line number Y = 8 + 1 = 9.
2486          *      So, x_max = (19 - 1) * 64 = 1152, and
2487          *          y_max = (9 - 1) * 64 = 512.
2488          */
2489         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2490         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2491         priv->x_bits = num_x_electrode;
2492         priv->y_bits = num_y_electrode;
2493         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2494         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2495
2496         if (alps_exit_command_mode(psmouse))
2497                 return -1;
2498
2499         return 0;
2500 }
2501
2502 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2503 {
2504         struct ps2dev *ps2dev = &psmouse->ps2dev;
2505         unsigned char param[2];
2506
2507         /* This is dolphin "v1" as empirically defined by florin9doi */
2508         param[0] = 0x64;
2509         param[1] = 0x28;
2510
2511         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2512             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2513             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2514                 return -1;
2515
2516         return 0;
2517 }
2518
2519 static int alps_hw_init_v7(struct psmouse *psmouse)
2520 {
2521         struct ps2dev *ps2dev = &psmouse->ps2dev;
2522         int reg_val, ret = -1;
2523
2524         if (alps_enter_command_mode(psmouse) ||
2525             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2526                 goto error;
2527
2528         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2529                 goto error;
2530
2531         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2532                 goto error;
2533
2534         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2535         if (reg_val == -1)
2536                 goto error;
2537         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2538                 goto error;
2539
2540         alps_exit_command_mode(psmouse);
2541         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2542
2543 error:
2544         alps_exit_command_mode(psmouse);
2545         return ret;
2546 }
2547
2548 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2549 {
2550         struct ps2dev *ps2dev = &psmouse->ps2dev;
2551         char param[2] = {0x64, 0x28};
2552         int ret = -1;
2553
2554         /* enter absolute mode */
2555         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2556             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2557             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2558             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2559                 goto error;
2560         }
2561
2562         /* T.B.D. Decread noise packet number, delete in the future */
2563         if (alps_exit_command_mode(psmouse) ||
2564             alps_enter_command_mode(psmouse) ||
2565             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2566                 goto error;
2567         }
2568         alps_exit_command_mode(psmouse);
2569
2570         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2571
2572 error:
2573         alps_exit_command_mode(psmouse);
2574         return ret;
2575 }
2576
2577 static int alps_set_protocol(struct psmouse *psmouse,
2578                              struct alps_data *priv,
2579                              const struct alps_protocol_info *protocol)
2580 {
2581         psmouse->private = priv;
2582
2583         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2584
2585         priv->proto_version = protocol->version;
2586         priv->byte0 = protocol->byte0;
2587         priv->mask0 = protocol->mask0;
2588         priv->flags = protocol->flags;
2589
2590         priv->x_max = 2000;
2591         priv->y_max = 1400;
2592         priv->x_bits = 15;
2593         priv->y_bits = 11;
2594
2595         switch (priv->proto_version) {
2596         case ALPS_PROTO_V1:
2597         case ALPS_PROTO_V2:
2598                 priv->hw_init = alps_hw_init_v1_v2;
2599                 priv->process_packet = alps_process_packet_v1_v2;
2600                 priv->set_abs_params = alps_set_abs_params_st;
2601                 priv->x_max = 1023;
2602                 priv->y_max = 767;
2603                 if (dmi_check_system(alps_dmi_has_separate_stick_buttons))
2604                         priv->flags |= ALPS_STICK_BITS;
2605                 break;
2606
2607         case ALPS_PROTO_V3:
2608                 priv->hw_init = alps_hw_init_v3;
2609                 priv->process_packet = alps_process_packet_v3;
2610                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2611                 priv->decode_fields = alps_decode_pinnacle;
2612                 priv->nibble_commands = alps_v3_nibble_commands;
2613                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2614
2615                 if (alps_probe_trackstick_v3_v7(psmouse,
2616                                                 ALPS_REG_BASE_PINNACLE) < 0)
2617                         priv->flags &= ~ALPS_DUALPOINT;
2618
2619                 break;
2620
2621         case ALPS_PROTO_V3_RUSHMORE:
2622                 priv->hw_init = alps_hw_init_rushmore_v3;
2623                 priv->process_packet = alps_process_packet_v3;
2624                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2625                 priv->decode_fields = alps_decode_rushmore;
2626                 priv->nibble_commands = alps_v3_nibble_commands;
2627                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2628                 priv->x_bits = 16;
2629                 priv->y_bits = 12;
2630
2631                 if (alps_probe_trackstick_v3_v7(psmouse,
2632                                                 ALPS_REG_BASE_RUSHMORE) < 0)
2633                         priv->flags &= ~ALPS_DUALPOINT;
2634
2635                 break;
2636
2637         case ALPS_PROTO_V4:
2638                 priv->hw_init = alps_hw_init_v4;
2639                 priv->process_packet = alps_process_packet_v4;
2640                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2641                 priv->nibble_commands = alps_v4_nibble_commands;
2642                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2643                 break;
2644
2645         case ALPS_PROTO_V5:
2646                 priv->hw_init = alps_hw_init_dolphin_v1;
2647                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2648                 priv->decode_fields = alps_decode_dolphin;
2649                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2650                 priv->nibble_commands = alps_v3_nibble_commands;
2651                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2652                 priv->x_bits = 23;
2653                 priv->y_bits = 12;
2654
2655                 if (alps_dolphin_get_device_area(psmouse, priv))
2656                         return -EIO;
2657
2658                 break;
2659
2660         case ALPS_PROTO_V6:
2661                 priv->hw_init = alps_hw_init_v6;
2662                 priv->process_packet = alps_process_packet_v6;
2663                 priv->set_abs_params = alps_set_abs_params_st;
2664                 priv->nibble_commands = alps_v6_nibble_commands;
2665                 priv->x_max = 2047;
2666                 priv->y_max = 1535;
2667                 break;
2668
2669         case ALPS_PROTO_V7:
2670                 priv->hw_init = alps_hw_init_v7;
2671                 priv->process_packet = alps_process_packet_v7;
2672                 priv->decode_fields = alps_decode_packet_v7;
2673                 priv->set_abs_params = alps_set_abs_params_v7;
2674                 priv->nibble_commands = alps_v3_nibble_commands;
2675                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2676                 priv->x_max = 0xfff;
2677                 priv->y_max = 0x7ff;
2678
2679                 if (priv->fw_ver[1] != 0xba)
2680                         priv->flags |= ALPS_BUTTONPAD;
2681
2682                 if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
2683                         priv->flags &= ~ALPS_DUALPOINT;
2684
2685                 break;
2686
2687         case ALPS_PROTO_V8:
2688                 priv->hw_init = alps_hw_init_ss4_v2;
2689                 priv->process_packet = alps_process_packet_ss4_v2;
2690                 priv->decode_fields = alps_decode_ss4_v2;
2691                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2692                 priv->nibble_commands = alps_v3_nibble_commands;
2693                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2694
2695                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2696                         return -EIO;
2697
2698                 break;
2699         }
2700
2701         return 0;
2702 }
2703
2704 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2705                                                          unsigned char *ec)
2706 {
2707         const struct alps_model_info *model;
2708         int i;
2709
2710         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2711                 model = &alps_model_data[i];
2712
2713                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2714                     (!model->command_mode_resp ||
2715                      model->command_mode_resp == ec[2])) {
2716
2717                         return &model->protocol_info;
2718                 }
2719         }
2720
2721         return NULL;
2722 }
2723
2724 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2725 {
2726         const struct alps_protocol_info *protocol;
2727         unsigned char e6[4], e7[4], ec[4];
2728         int error;
2729
2730         /*
2731          * First try "E6 report".
2732          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2733          * The bits 0-2 of the first byte will be 1s if some buttons are
2734          * pressed.
2735          */
2736         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2737                          PSMOUSE_CMD_SETSCALE11, e6))
2738                 return -EIO;
2739
2740         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2741                 return -EINVAL;
2742
2743         /*
2744          * Now get the "E7" and "EC" reports.  These will uniquely identify
2745          * most ALPS touchpads.
2746          */
2747         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2748                          PSMOUSE_CMD_SETSCALE21, e7) ||
2749             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2750                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2751             alps_exit_command_mode(psmouse))
2752                 return -EIO;
2753
2754         protocol = alps_match_table(e7, ec);
2755         if (!protocol) {
2756                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2757                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2758                         protocol = &alps_v5_protocol_data;
2759                 } else if (ec[0] == 0x88 &&
2760                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2761                         protocol = &alps_v7_protocol_data;
2762                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2763                         protocol = &alps_v3_rushmore_data;
2764                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2765                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2766                         protocol = &alps_v3_protocol_data;
2767                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2768                            e7[2] == 0x14 && ec[1] == 0x02) {
2769                         protocol = &alps_v8_protocol_data;
2770                 } else {
2771                         psmouse_dbg(psmouse,
2772                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2773                         return -EINVAL;
2774                 }
2775         }
2776
2777         if (priv) {
2778                 /* Save the Firmware version */
2779                 memcpy(priv->fw_ver, ec, 3);
2780                 error = alps_set_protocol(psmouse, priv, protocol);
2781                 if (error)
2782                         return error;
2783         }
2784
2785         return 0;
2786 }
2787
2788 static int alps_reconnect(struct psmouse *psmouse)
2789 {
2790         struct alps_data *priv = psmouse->private;
2791
2792         psmouse_reset(psmouse);
2793
2794         if (alps_identify(psmouse, priv) < 0)
2795                 return -1;
2796
2797         return priv->hw_init(psmouse);
2798 }
2799
2800 static void alps_disconnect(struct psmouse *psmouse)
2801 {
2802         struct alps_data *priv = psmouse->private;
2803
2804         psmouse_reset(psmouse);
2805         del_timer_sync(&priv->timer);
2806         if (priv->dev2)
2807                 input_unregister_device(priv->dev2);
2808         if (!IS_ERR_OR_NULL(priv->dev3))
2809                 input_unregister_device(priv->dev3);
2810         kfree(priv);
2811 }
2812
2813 static void alps_set_abs_params_st(struct alps_data *priv,
2814                                    struct input_dev *dev1)
2815 {
2816         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2817         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2818         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2819 }
2820
2821 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2822                                           struct input_dev *dev1)
2823 {
2824         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2825         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2826
2827         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2828         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2829
2830         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2831         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2832 }
2833
2834 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
2835                                         struct input_dev *dev1)
2836 {
2837         alps_set_abs_params_mt_common(priv, dev1);
2838         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2839
2840         input_mt_init_slots(dev1, MAX_TOUCHES,
2841                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2842                                 INPUT_MT_SEMI_MT);
2843 }
2844
2845 static void alps_set_abs_params_v7(struct alps_data *priv,
2846                                    struct input_dev *dev1)
2847 {
2848         alps_set_abs_params_mt_common(priv, dev1);
2849         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2850
2851         input_mt_init_slots(dev1, MAX_TOUCHES,
2852                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2853                                 INPUT_MT_TRACK);
2854
2855         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2856 }
2857
2858 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2859                                        struct input_dev *dev1)
2860 {
2861         alps_set_abs_params_mt_common(priv, dev1);
2862         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2863         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2864
2865         input_mt_init_slots(dev1, MAX_TOUCHES,
2866                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2867                                 INPUT_MT_TRACK);
2868 }
2869
2870 int alps_init(struct psmouse *psmouse)
2871 {
2872         struct alps_data *priv = psmouse->private;
2873         struct input_dev *dev1 = psmouse->dev;
2874         int error;
2875
2876         error = priv->hw_init(psmouse);
2877         if (error)
2878                 goto init_fail;
2879
2880         /*
2881          * Undo part of setup done for us by psmouse core since touchpad
2882          * is not a relative device.
2883          */
2884         __clear_bit(EV_REL, dev1->evbit);
2885         __clear_bit(REL_X, dev1->relbit);
2886         __clear_bit(REL_Y, dev1->relbit);
2887
2888         /*
2889          * Now set up our capabilities.
2890          */
2891         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2892         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2893         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2894         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2895                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2896
2897         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2898
2899         priv->set_abs_params(priv, dev1);
2900
2901         if (priv->flags & ALPS_WHEEL) {
2902                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2903                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2904         }
2905
2906         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2907                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2908                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2909         }
2910
2911         if (priv->flags & ALPS_FOUR_BUTTONS) {
2912                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2913                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2914                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2915                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2916         } else if (priv->flags & ALPS_BUTTONPAD) {
2917                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2918                 clear_bit(BTN_RIGHT, dev1->keybit);
2919         } else {
2920                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2921         }
2922
2923         if (priv->flags & ALPS_DUALPOINT) {
2924                 struct input_dev *dev2;
2925
2926                 dev2 = input_allocate_device();
2927                 if (!dev2) {
2928                         psmouse_err(psmouse,
2929                                     "failed to allocate trackstick device\n");
2930                         error = -ENOMEM;
2931                         goto init_fail;
2932                 }
2933
2934                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2935                          psmouse->ps2dev.serio->phys);
2936                 dev2->phys = priv->phys2;
2937
2938                 /*
2939                  * format of input device name is: "protocol vendor name"
2940                  * see function psmouse_switch_protocol() in psmouse-base.c
2941                  */
2942                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2943
2944                 dev2->id.bustype = BUS_I8042;
2945                 dev2->id.vendor  = 0x0002;
2946                 dev2->id.product = PSMOUSE_ALPS;
2947                 dev2->id.version = priv->proto_version;
2948                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2949
2950                 input_set_capability(dev2, EV_REL, REL_X);
2951                 input_set_capability(dev2, EV_REL, REL_Y);
2952                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2953                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2954                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2955
2956                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2957                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2958
2959                 error = input_register_device(dev2);
2960                 if (error) {
2961                         psmouse_err(psmouse,
2962                                     "failed to register trackstick device: %d\n",
2963                                     error);
2964                         input_free_device(dev2);
2965                         goto init_fail;
2966                 }
2967
2968                 priv->dev2 = dev2;
2969         }
2970
2971         priv->psmouse = psmouse;
2972
2973         INIT_DELAYED_WORK(&priv->dev3_register_work,
2974                           alps_register_bare_ps2_mouse);
2975
2976         psmouse->protocol_handler = alps_process_byte;
2977         psmouse->poll = alps_poll;
2978         psmouse->disconnect = alps_disconnect;
2979         psmouse->reconnect = alps_reconnect;
2980         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2981
2982         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2983         psmouse->resync_time = 0;
2984
2985         /* Allow 2 invalid packets without resetting device */
2986         psmouse->resetafter = psmouse->pktsize * 2;
2987
2988         return 0;
2989
2990 init_fail:
2991         psmouse_reset(psmouse);
2992         /*
2993          * Even though we did not allocate psmouse->private we do free
2994          * it here.
2995          */
2996         kfree(psmouse->private);
2997         psmouse->private = NULL;
2998         return error;
2999 }
3000
3001 int alps_detect(struct psmouse *psmouse, bool set_properties)
3002 {
3003         struct alps_data *priv;
3004         int error;
3005
3006         error = alps_identify(psmouse, NULL);
3007         if (error)
3008                 return error;
3009
3010         /*
3011          * Reset the device to make sure it is fully operational:
3012          * on some laptops, like certain Dell Latitudes, we may
3013          * fail to properly detect presence of trackstick if device
3014          * has not been reset.
3015          */
3016         psmouse_reset(psmouse);
3017
3018         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
3019         if (!priv)
3020                 return -ENOMEM;
3021
3022         error = alps_identify(psmouse, priv);
3023         if (error) {
3024                 kfree(priv);
3025                 return error;
3026         }
3027
3028         if (set_properties) {
3029                 psmouse->vendor = "ALPS";
3030                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
3031                                 "DualPoint TouchPad" : "GlidePoint";
3032                 psmouse->model = priv->proto_version;
3033         } else {
3034                 /*
3035                  * Destroy alps_data structure we allocated earlier since
3036                  * this was just a "trial run". Otherwise we'll keep it
3037                  * to be used by alps_init() which has to be called if
3038                  * we succeed and set_properties is true.
3039                  */
3040                 kfree(priv);
3041                 psmouse->private = NULL;
3042         }
3043
3044         return 0;
3045 }
3046