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 #define ALPS_DUALPOINT_WITH_PRESSURE    0x400   /* device can report trackpoint pressure */
 107
 108 static const struct alps_model_info alps_model_data[] = {
 109         /*
 110          * XXX This entry is suspicious. First byte has zero lower nibble,
 111          * which is what a normal mouse would report. Also, the value 0x0e
 112          * isn't valid per PS/2 spec.
 113          */
 114         { { 0x20, 0x02, 0x0e }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 115
 116         { { 0x22, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
 117         { { 0x22, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } },    /* Dell Latitude D600 */
 118         { { 0x32, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },    /* Toshiba Salellite Pro M10 */
 119         { { 0x33, 0x02, 0x0a }, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } },                             /* UMAX-530T */
 120         { { 0x52, 0x01, 0x14 }, { ALPS_PROTO_V2, 0xff, 0xff,
 121                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },                          /* Toshiba Tecra A11-11L */
 122         { { 0x53, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 123         { { 0x53, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 124         { { 0x60, 0x03, 0xc8 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },                             /* HP ze1115 */
 125         { { 0x62, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xcf, 0xcf,
 126                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },                          /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
 127         { { 0x63, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 128         { { 0x63, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 129         { { 0x63, 0x02, 0x28 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },                  /* Fujitsu Siemens S6010 */
 130         { { 0x63, 0x02, 0x3c }, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } },                    /* Toshiba Satellite S2400-103 */
 131         { { 0x63, 0x02, 0x50 }, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } },                  /* NEC Versa L320 */
 132         { { 0x63, 0x02, 0x64 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 133         { { 0x63, 0x03, 0xc8 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },    /* Dell Latitude D800 */
 134         { { 0x73, 0x00, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } },                /* ThinkPad R61 8918-5QG */
 135         { { 0x73, 0x00, 0x14 }, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } },                /* Dell XT2 */
 136         { { 0x73, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
 137         { { 0x73, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },                  /* Ahtec Laptop */
 138         { { 0x73, 0x02, 0x50 }, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } },             /* Dell Vostro 1400 */
 139 };
 140
 141 static const struct alps_protocol_info alps_v3_protocol_data = {
 142         ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT
 143 };
 144
 145 static const struct alps_protocol_info alps_v3_rushmore_data = {
 146         ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT
 147 };
 148
 149 static const struct alps_protocol_info alps_v4_protocol_data = {
 150         ALPS_PROTO_V4, 0x8f, 0x8f, 0
 151 };
 152
 153 static const struct alps_protocol_info alps_v5_protocol_data = {
 154         ALPS_PROTO_V5, 0xc8, 0xd8, 0
 155 };
 156
 157 static const struct alps_protocol_info alps_v7_protocol_data = {
 158         ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
 159 };
 160
 161 static const struct alps_protocol_info alps_v8_protocol_data = {
 162         ALPS_PROTO_V8, 0x18, 0x18, 0
 163 };
 164
 165 static const struct alps_protocol_info alps_v9_protocol_data = {
 166         ALPS_PROTO_V9, 0xc8, 0xc8, 0
 167 };
 168
 169 /*
 170  * Some v2 models report the stick buttons in separate bits
 171  */
 172 static const struct dmi_system_id alps_dmi_has_separate_stick_buttons[] = {
 173 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
 174         {
 175                 /* Extrapolated from other entries */
 176                 .matches = {
 177                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 178                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D420"),
 179                 },
 180         },
 181         {
 182                 /* Reported-by: Hans de Bruin <jmdebruin@xmsnet.nl> */
 183                 .matches = {
 184                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 185                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D430"),
 186                 },
 187         },
 188         {
 189                 /* Reported-by: Hans de Goede <hdegoede@redhat.com> */
 190                 .matches = {
 191                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 192                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D620"),
 193                 },
 194         },
 195         {
 196                 /* Extrapolated from other entries */
 197                 .matches = {
 198                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 199                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D630"),
 200                 },
 201         },
 202 #endif
 203         { }
 204 };
 205
 206 static void alps_set_abs_params_st(struct alps_data *priv,
 207                                    struct input_dev *dev1);
 208 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
 209                                         struct input_dev *dev1);
 210 static void alps_set_abs_params_v7(struct alps_data *priv,
 211                                    struct input_dev *dev1);
 212 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
 213                                        struct input_dev *dev1);
 214
 215 /* Packet formats are described in Documentation/input/alps.txt */
 216
 217 static bool alps_is_valid_first_byte(struct alps_data *priv,
 218                                      unsigned char data)
 219 {
 220         return (data & priv->mask0) == priv->byte0;
 221 }
 222
 223 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
 224                                 int left, int right, int middle)
 225 {
 226         struct input_dev *dev;
 227
 228         /*
 229          * If shared button has already been reported on the
 230          * other device (dev2) then this event should be also
 231          * sent through that device.
 232          */
 233         dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
 234         input_report_key(dev, BTN_LEFT, left);
 235
 236         dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
 237         input_report_key(dev, BTN_RIGHT, right);
 238
 239         dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
 240         input_report_key(dev, BTN_MIDDLE, middle);
 241
 242         /*
 243          * Sync the _other_ device now, we'll do the first
 244          * device later once we report the rest of the events.
 245          */
 246         if (dev2)
 247                 input_sync(dev2);
 248 }
 249
 250 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
 251 {
 252         struct alps_data *priv = psmouse->private;
 253         unsigned char *packet = psmouse->packet;
 254         struct input_dev *dev = psmouse->dev;
 255         struct input_dev *dev2 = priv->dev2;
 256         int x, y, z, ges, fin, left, right, middle;
 257         int back = 0, forward = 0;
 258
 259         if (priv->proto_version == ALPS_PROTO_V1) {
 260                 left = packet[2] & 0x10;
 261                 right = packet[2] & 0x08;
 262                 middle = 0;
 263                 x = packet[1] | ((packet[0] & 0x07) << 7);
 264                 y = packet[4] | ((packet[3] & 0x07) << 7);
 265                 z = packet[5];
 266         } else {
 267                 left = packet[3] & 1;
 268                 right = packet[3] & 2;
 269                 middle = packet[3] & 4;
 270                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 271                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 272                 z = packet[5];
 273         }
 274
 275         if (priv->flags & ALPS_FW_BK_1) {
 276                 back = packet[0] & 0x10;
 277                 forward = packet[2] & 4;
 278         }
 279
 280         if (priv->flags & ALPS_FW_BK_2) {
 281                 back = packet[3] & 4;
 282                 forward = packet[2] & 4;
 283                 if ((middle = forward && back))
 284                         forward = back = 0;
 285         }
 286
 287         ges = packet[2] & 1;
 288         fin = packet[2] & 2;
 289
 290         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
 291                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 292                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 293
 294                 alps_report_buttons(dev2, dev, left, right, middle);
 295
 296                 input_sync(dev2);
 297                 return;
 298         }
 299
 300         /* Some models have separate stick button bits */
 301         if (priv->flags & ALPS_STICK_BITS) {
 302                 left |= packet[0] & 1;
 303                 right |= packet[0] & 2;
 304                 middle |= packet[0] & 4;
 305         }
 306
 307         alps_report_buttons(dev, dev2, left, right, middle);
 308
 309         /* Convert hardware tap to a reasonable Z value */
 310         if (ges && !fin)
 311                 z = 40;
 312
 313         /*
 314          * A "tap and drag" operation is reported by the hardware as a transition
 315          * from (!fin && ges) to (fin && ges). This should be translated to the
 316          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 317          */
 318         if (ges && fin && !priv->prev_fin) {
 319                 input_report_abs(dev, ABS_X, x);
 320                 input_report_abs(dev, ABS_Y, y);
 321                 input_report_abs(dev, ABS_PRESSURE, 0);
 322                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 323                 input_sync(dev);
 324         }
 325         priv->prev_fin = fin;
 326
 327         if (z > 30)
 328                 input_report_key(dev, BTN_TOUCH, 1);
 329         if (z < 25)
 330                 input_report_key(dev, BTN_TOUCH, 0);
 331
 332         if (z > 0) {
 333                 input_report_abs(dev, ABS_X, x);
 334                 input_report_abs(dev, ABS_Y, y);
 335         }
 336
 337         input_report_abs(dev, ABS_PRESSURE, z);
 338         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 339
 340         if (priv->flags & ALPS_WHEEL)
 341                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 342
 343         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 344                 input_report_key(dev, BTN_FORWARD, forward);
 345                 input_report_key(dev, BTN_BACK, back);
 346         }
 347
 348         if (priv->flags & ALPS_FOUR_BUTTONS) {
 349                 input_report_key(dev, BTN_0, packet[2] & 4);
 350                 input_report_key(dev, BTN_1, packet[0] & 0x10);
 351                 input_report_key(dev, BTN_2, packet[3] & 4);
 352                 input_report_key(dev, BTN_3, packet[0] & 0x20);
 353         }
 354
 355         input_sync(dev);
 356 }
 357
 358 static void alps_get_bitmap_points(unsigned int map,
 359                                    struct alps_bitmap_point *low,
 360                                    struct alps_bitmap_point *high,
 361                                    int *fingers)
 362 {
 363         struct alps_bitmap_point *point;
 364         int i, bit, prev_bit = 0;
 365
 366         point = low;
 367         for (i = 0; map != 0; i++, map >>= 1) {
 368                 bit = map & 1;
 369                 if (bit) {
 370                         if (!prev_bit) {
 371                                 point->start_bit = i;
 372                                 point->num_bits = 0;
 373                                 (*fingers)++;
 374                         }
 375                         point->num_bits++;
 376                 } else {
 377                         if (prev_bit)
 378                                 point = high;
 379                 }
 380                 prev_bit = bit;
 381         }
 382 }
 383
 384 /*
 385  * Process bitmap data from semi-mt protocols. Returns the number of
 386  * fingers detected. A return value of 0 means at least one of the
 387  * bitmaps was empty.
 388  *
 389  * The bitmaps don't have enough data to track fingers, so this function
 390  * only generates points representing a bounding box of all contacts.
 391  * These points are returned in fields->mt when the return value
 392  * is greater than 0.
 393  */
 394 static int alps_process_bitmap(struct alps_data *priv,
 395                                struct alps_fields *fields)
 396 {
 397         int i, fingers_x = 0, fingers_y = 0, fingers, closest;
 398         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 399         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
 400         struct input_mt_pos corner[4];
 401
 402         if (!fields->x_map || !fields->y_map)
 403                 return 0;
 404
 405         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
 406         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
 407
 408         /*
 409          * Fingers can overlap, so we use the maximum count of fingers
 410          * on either axis as the finger count.
 411          */
 412         fingers = max(fingers_x, fingers_y);
 413
 414         /*
 415          * If an axis reports only a single contact, we have overlapping or
 416          * adjacent fingers. Divide the single contact between the two points.
 417          */
 418         if (fingers_x == 1) {
 419                 i = (x_low.num_bits - 1) / 2;
 420                 x_low.num_bits = x_low.num_bits - i;
 421                 x_high.start_bit = x_low.start_bit + i;
 422                 x_high.num_bits = max(i, 1);
 423         }
 424         if (fingers_y == 1) {
 425                 i = (y_low.num_bits - 1) / 2;
 426                 y_low.num_bits = y_low.num_bits - i;
 427                 y_high.start_bit = y_low.start_bit + i;
 428                 y_high.num_bits = max(i, 1);
 429         }
 430
 431         /* top-left corner */
 432         corner[0].x =
 433                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 434                 (2 * (priv->x_bits - 1));
 435         corner[0].y =
 436                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 437                 (2 * (priv->y_bits - 1));
 438
 439         /* top-right corner */
 440         corner[1].x =
 441                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 442                 (2 * (priv->x_bits - 1));
 443         corner[1].y =
 444                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
 445                 (2 * (priv->y_bits - 1));
 446
 447         /* bottom-right corner */
 448         corner[2].x =
 449                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
 450                 (2 * (priv->x_bits - 1));
 451         corner[2].y =
 452                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 453                 (2 * (priv->y_bits - 1));
 454
 455         /* bottom-left corner */
 456         corner[3].x =
 457                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
 458                 (2 * (priv->x_bits - 1));
 459         corner[3].y =
 460                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
 461                 (2 * (priv->y_bits - 1));
 462
 463         /* x-bitmap order is reversed on v5 touchpads  */
 464         if (priv->proto_version == ALPS_PROTO_V5) {
 465                 for (i = 0; i < 4; i++)
 466                         corner[i].x = priv->x_max - corner[i].x;
 467         }
 468
 469         /* y-bitmap order is reversed on v3 and v4 touchpads  */
 470         if (priv->proto_version == ALPS_PROTO_V3 ||
 471             priv->proto_version == ALPS_PROTO_V4) {
 472                 for (i = 0; i < 4; i++)
 473                         corner[i].y = priv->y_max - corner[i].y;
 474         }
 475
 476         /*
 477          * We only select a corner for the second touch once per 2 finger
 478          * touch sequence to avoid the chosen corner (and thus the coordinates)
 479          * jumping around when the first touch is in the middle.
 480          */
 481         if (priv->second_touch == -1) {
 482                 /* Find corner closest to our st coordinates */
 483                 closest = 0x7fffffff;
 484                 for (i = 0; i < 4; i++) {
 485                         int dx = fields->st.x - corner[i].x;
 486                         int dy = fields->st.y - corner[i].y;
 487                         int distance = dx * dx + dy * dy;
 488
 489                         if (distance < closest) {
 490                                 priv->second_touch = i;
 491                                 closest = distance;
 492                         }
 493                 }
 494                 /* And select the opposite corner to use for the 2nd touch */
 495                 priv->second_touch = (priv->second_touch + 2) % 4;
 496         }
 497
 498         fields->mt[0] = fields->st;
 499         fields->mt[1] = corner[priv->second_touch];
 500
 501         return fingers;
 502 }
 503
 504 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
 505 {
 506         input_mt_slot(dev, slot);
 507         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 508         input_report_abs(dev, ABS_MT_POSITION_X, x);
 509         input_report_abs(dev, ABS_MT_POSITION_Y, y);
 510 }
 511
 512 static void alps_report_mt_data(struct psmouse *psmouse, int n)
 513 {
 514         struct alps_data *priv = psmouse->private;
 515         struct input_dev *dev = psmouse->dev;
 516         struct alps_fields *f = &priv->f;
 517         int i, slot[MAX_TOUCHES];
 518
 519         input_mt_assign_slots(dev, slot, f->mt, n, 0);
 520         for (i = 0; i < n; i++)
 521                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
 522
 523         input_mt_sync_frame(dev);
 524 }
 525
 526 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
 527 {
 528         struct alps_data *priv = psmouse->private;
 529         struct input_dev *dev = psmouse->dev;
 530         struct alps_fields *f = &priv->f;
 531
 532         /* Use st data when we don't have mt data */
 533         if (fingers < 2) {
 534                 f->mt[0].x = f->st.x;
 535                 f->mt[0].y = f->st.y;
 536                 fingers = f->pressure > 0 ? 1 : 0;
 537                 priv->second_touch = -1;
 538         }
 539
 540         if (fingers >= 1)
 541                 alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y);
 542         if (fingers >= 2)
 543                 alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y);
 544         input_mt_sync_frame(dev);
 545
 546         input_mt_report_finger_count(dev, fingers);
 547
 548         input_report_key(dev, BTN_LEFT, f->left);
 549         input_report_key(dev, BTN_RIGHT, f->right);
 550         input_report_key(dev, BTN_MIDDLE, f->middle);
 551
 552         input_report_abs(dev, ABS_PRESSURE, f->pressure);
 553
 554         input_sync(dev);
 555 }
 556
 557 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 558 {
 559         struct alps_data *priv = psmouse->private;
 560         unsigned char *packet = psmouse->packet;
 561         struct input_dev *dev = priv->dev2;
 562         int x, y, z, left, right, middle;
 563
 564         /* It should be a DualPoint when received trackstick packet */
 565         if (!(priv->flags & ALPS_DUALPOINT)) {
 566                 psmouse_warn(psmouse,
 567                              "Rejected trackstick packet from non DualPoint device");
 568                 return;
 569         }
 570
 571         /* Sanity check packet */
 572         if (!(packet[0] & 0x40)) {
 573                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
 574                 return;
 575         }
 576
 577         /*
 578          * There's a special packet that seems to indicate the end
 579          * of a stream of trackstick data. Filter these out.
 580          */
 581         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
 582                 return;
 583
 584         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 585         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
 586         z = (packet[4] & 0x7c) >> 2;
 587
 588         /*
 589          * The x and y values tend to be quite large, and when used
 590          * alone the trackstick is difficult to use. Scale them down
 591          * to compensate.
 592          */
 593         x /= 8;
 594         y /= 8;
 595
 596         input_report_rel(dev, REL_X, x);
 597         input_report_rel(dev, REL_Y, -y);
 598
 599         /*
 600          * Most ALPS models report the trackstick buttons in the touchpad
 601          * packets, but a few report them here. No reliable way has been
 602          * found to differentiate between the models upfront, so we enable
 603          * the quirk in response to seeing a button press in the trackstick
 604          * packet.
 605          */
 606         left = packet[3] & 0x01;
 607         right = packet[3] & 0x02;
 608         middle = packet[3] & 0x04;
 609
 610         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
 611             (left || right || middle))
 612                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
 613
 614         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
 615                 input_report_key(dev, BTN_LEFT, left);
 616                 input_report_key(dev, BTN_RIGHT, right);
 617                 input_report_key(dev, BTN_MIDDLE, middle);
 618         }
 619
 620         input_sync(dev);
 621         return;
 622 }
 623
 624 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
 625 {
 626         f->left = !!(p[3] & 0x01);
 627         f->right = !!(p[3] & 0x02);
 628         f->middle = !!(p[3] & 0x04);
 629
 630         f->ts_left = !!(p[3] & 0x10);
 631         f->ts_right = !!(p[3] & 0x20);
 632         f->ts_middle = !!(p[3] & 0x40);
 633 }
 634
 635 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 636                                  struct psmouse *psmouse)
 637 {
 638         f->first_mp = !!(p[4] & 0x40);
 639         f->is_mp = !!(p[0] & 0x40);
 640
 641         if (f->is_mp) {
 642                 f->fingers = (p[5] & 0x3) + 1;
 643                 f->x_map = ((p[4] & 0x7e) << 8) |
 644                            ((p[1] & 0x7f) << 2) |
 645                            ((p[0] & 0x30) >> 4);
 646                 f->y_map = ((p[3] & 0x70) << 4) |
 647                            ((p[2] & 0x7f) << 1) |
 648                            (p[4] & 0x01);
 649         } else {
 650                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 651                        ((p[0] & 0x30) >> 4);
 652                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 653                 f->pressure = p[5] & 0x7f;
 654
 655                 alps_decode_buttons_v3(f, p);
 656         }
 657
 658         return 0;
 659 }
 660
 661 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 662                                  struct psmouse *psmouse)
 663 {
 664         f->first_mp = !!(p[4] & 0x40);
 665         f->is_mp = !!(p[5] & 0x40);
 666
 667         if (f->is_mp) {
 668                 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
 669                 f->x_map = ((p[5] & 0x10) << 11) |
 670                            ((p[4] & 0x7e) << 8) |
 671                            ((p[1] & 0x7f) << 2) |
 672                            ((p[0] & 0x30) >> 4);
 673                 f->y_map = ((p[5] & 0x20) << 6) |
 674                            ((p[3] & 0x70) << 4) |
 675                            ((p[2] & 0x7f) << 1) |
 676                            (p[4] & 0x01);
 677         } else {
 678                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 679                        ((p[0] & 0x30) >> 4);
 680                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
 681                 f->pressure = p[5] & 0x7f;
 682
 683                 alps_decode_buttons_v3(f, p);
 684         }
 685
 686         return 0;
 687 }
 688
 689 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 690                                 struct psmouse *psmouse)
 691 {
 692         u64 palm_data = 0;
 693         struct alps_data *priv = psmouse->private;
 694
 695         f->first_mp = !!(p[0] & 0x02);
 696         f->is_mp = !!(p[0] & 0x20);
 697
 698         if (!f->is_mp) {
 699                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
 700                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
 701                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
 702                 alps_decode_buttons_v3(f, p);
 703         } else {
 704                 f->fingers = ((p[0] & 0x6) >> 1 |
 705                      (p[0] & 0x10) >> 2);
 706
 707                 palm_data = (p[1] & 0x7f) |
 708                             ((p[2] & 0x7f) << 7) |
 709                             ((p[4] & 0x7f) << 14) |
 710                             ((p[5] & 0x7f) << 21) |
 711                             ((p[3] & 0x07) << 28) |
 712                             (((u64)p[3] & 0x70) << 27) |
 713                             (((u64)p[0] & 0x01) << 34);
 714
 715                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
 716                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
 717
 718                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
 719                 f->x_map = (palm_data >> priv->y_bits) &
 720                            (BIT(priv->x_bits) - 1);
 721         }
 722
 723         return 0;
 724 }
 725
 726 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 727 {
 728         struct alps_data *priv = psmouse->private;
 729         unsigned char *packet = psmouse->packet;
 730         struct input_dev *dev2 = priv->dev2;
 731         struct alps_fields *f = &priv->f;
 732         int fingers = 0;
 733
 734         memset(f, 0, sizeof(*f));
 735
 736         priv->decode_fields(f, packet, psmouse);
 737
 738         /*
 739          * There's no single feature of touchpad position and bitmap packets
 740          * that can be used to distinguish between them. We rely on the fact
 741          * that a bitmap packet should always follow a position packet with
 742          * bit 6 of packet[4] set.
 743          */
 744         if (priv->multi_packet) {
 745                 /*
 746                  * Sometimes a position packet will indicate a multi-packet
 747                  * sequence, but then what follows is another position
 748                  * packet. Check for this, and when it happens process the
 749                  * position packet as usual.
 750                  */
 751                 if (f->is_mp) {
 752                         fingers = f->fingers;
 753                         /*
 754                          * Bitmap processing uses position packet's coordinate
 755                          * data, so we need to do decode it first.
 756                          */
 757                         priv->decode_fields(f, priv->multi_data, psmouse);
 758                         if (alps_process_bitmap(priv, f) == 0)
 759                                 fingers = 0; /* Use st data */
 760                 } else {
 761                         priv->multi_packet = 0;
 762                 }
 763         }
 764
 765         /*
 766          * Bit 6 of byte 0 is not usually set in position packets. The only
 767          * times it seems to be set is in situations where the data is
 768          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
 769          * this combined with the fact that this bit is useful for filtering
 770          * out misidentified bitmap packets, we reject anything with this
 771          * bit set.
 772          */
 773         if (f->is_mp)
 774                 return;
 775
 776         if (!priv->multi_packet && f->first_mp) {
 777                 priv->multi_packet = 1;
 778                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 779                 return;
 780         }
 781
 782         priv->multi_packet = 0;
 783
 784         /*
 785          * Sometimes the hardware sends a single packet with z = 0
 786          * in the middle of a stream. Real releases generate packets
 787          * with x, y, and z all zero, so these seem to be flukes.
 788          * Ignore them.
 789          */
 790         if (f->st.x && f->st.y && !f->pressure)
 791                 return;
 792
 793         alps_report_semi_mt_data(psmouse, fingers);
 794
 795         if ((priv->flags & ALPS_DUALPOINT) &&
 796             !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
 797                 input_report_key(dev2, BTN_LEFT, f->ts_left);
 798                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
 799                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
 800                 input_sync(dev2);
 801         }
 802 }
 803
 804 static void alps_process_packet_v3(struct psmouse *psmouse)
 805 {
 806         unsigned char *packet = psmouse->packet;
 807
 808         /*
 809          * v3 protocol packets come in three types, two representing
 810          * touchpad data and one representing trackstick data.
 811          * Trackstick packets seem to be distinguished by always
 812          * having 0x3f in the last byte. This value has never been
 813          * observed in the last byte of either of the other types
 814          * of packets.
 815          */
 816         if (packet[5] == 0x3f) {
 817                 alps_process_trackstick_packet_v3(psmouse);
 818                 return;
 819         }
 820
 821         alps_process_touchpad_packet_v3_v5(psmouse);
 822 }
 823
 824 static void alps_process_packet_v6(struct psmouse *psmouse)
 825 {
 826         struct alps_data *priv = psmouse->private;
 827         unsigned char *packet = psmouse->packet;
 828         struct input_dev *dev = psmouse->dev;
 829         struct input_dev *dev2 = priv->dev2;
 830         int x, y, z, left, right, middle;
 831
 832         /*
 833          * We can use Byte5 to distinguish if the packet is from Touchpad
 834          * or Trackpoint.
 835          * Touchpad:    0 - 0x7E
 836          * Trackpoint:  0x7F
 837          */
 838         if (packet[5] == 0x7F) {
 839                 /* It should be a DualPoint when received Trackpoint packet */
 840                 if (!(priv->flags & ALPS_DUALPOINT)) {
 841                         psmouse_warn(psmouse,
 842                                      "Rejected trackstick packet from non DualPoint device");
 843                         return;
 844                 }
 845
 846                 /* Trackpoint packet */
 847                 x = packet[1] | ((packet[3] & 0x20) << 2);
 848                 y = packet[2] | ((packet[3] & 0x40) << 1);
 849                 z = packet[4];
 850                 left = packet[3] & 0x01;
 851                 right = packet[3] & 0x02;
 852                 middle = packet[3] & 0x04;
 853
 854                 /* To prevent the cursor jump when finger lifted */
 855                 if (x == 0x7F && y == 0x7F && z == 0x7F)
 856                         x = y = z = 0;
 857
 858                 /* Divide 4 since trackpoint's speed is too fast */
 859                 input_report_rel(dev2, REL_X, (char)x / 4);
 860                 input_report_rel(dev2, REL_Y, -((char)y / 4));
 861
 862                 input_report_key(dev2, BTN_LEFT, left);
 863                 input_report_key(dev2, BTN_RIGHT, right);
 864                 input_report_key(dev2, BTN_MIDDLE, middle);
 865
 866                 input_sync(dev2);
 867                 return;
 868         }
 869
 870         /* Touchpad packet */
 871         x = packet[1] | ((packet[3] & 0x78) << 4);
 872         y = packet[2] | ((packet[4] & 0x78) << 4);
 873         z = packet[5];
 874         left = packet[3] & 0x01;
 875         right = packet[3] & 0x02;
 876
 877         if (z > 30)
 878                 input_report_key(dev, BTN_TOUCH, 1);
 879         if (z < 25)
 880                 input_report_key(dev, BTN_TOUCH, 0);
 881
 882         if (z > 0) {
 883                 input_report_abs(dev, ABS_X, x);
 884                 input_report_abs(dev, ABS_Y, y);
 885         }
 886
 887         input_report_abs(dev, ABS_PRESSURE, z);
 888         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 889
 890         /* v6 touchpad does not have middle button */
 891         input_report_key(dev, BTN_LEFT, left);
 892         input_report_key(dev, BTN_RIGHT, right);
 893
 894         input_sync(dev);
 895 }
 896
 897 static void alps_process_packet_v4(struct psmouse *psmouse)
 898 {
 899         struct alps_data *priv = psmouse->private;
 900         unsigned char *packet = psmouse->packet;
 901         struct alps_fields *f = &priv->f;
 902         int offset;
 903
 904         /*
 905          * v4 has a 6-byte encoding for bitmap data, but this data is
 906          * broken up between 3 normal packets. Use priv->multi_packet to
 907          * track our position in the bitmap packet.
 908          */
 909         if (packet[6] & 0x40) {
 910                 /* sync, reset position */
 911                 priv->multi_packet = 0;
 912         }
 913
 914         if (WARN_ON_ONCE(priv->multi_packet > 2))
 915                 return;
 916
 917         offset = 2 * priv->multi_packet;
 918         priv->multi_data[offset] = packet[6];
 919         priv->multi_data[offset + 1] = packet[7];
 920
 921         f->left = !!(packet[4] & 0x01);
 922         f->right = !!(packet[4] & 0x02);
 923
 924         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
 925                   ((packet[0] & 0x30) >> 4);
 926         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
 927         f->pressure = packet[5] & 0x7f;
 928
 929         if (++priv->multi_packet > 2) {
 930                 priv->multi_packet = 0;
 931
 932                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
 933                            ((priv->multi_data[3] & 0x60) << 3) |
 934                            ((priv->multi_data[0] & 0x3f) << 2) |
 935                            ((priv->multi_data[1] & 0x60) >> 5);
 936                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
 937                            ((priv->multi_data[3] & 0x1f) << 5) |
 938                             (priv->multi_data[1] & 0x1f);
 939
 940                 f->fingers = alps_process_bitmap(priv, f);
 941         }
 942
 943         alps_report_semi_mt_data(psmouse, f->fingers);
 944 }
 945
 946 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
 947 {
 948         switch (psmouse->pktcnt) {
 949         case 3:
 950                 return (psmouse->packet[2] & 0x40) == 0x40;
 951         case 4:
 952                 return (psmouse->packet[3] & 0x48) == 0x48;
 953         case 6:
 954                 return (psmouse->packet[5] & 0x40) == 0x00;
 955         }
 956         return true;
 957 }
 958
 959 static unsigned char alps_get_packet_id_v7(char *byte)
 960 {
 961         unsigned char packet_id;
 962
 963         if (byte[4] & 0x40)
 964                 packet_id = V7_PACKET_ID_TWO;
 965         else if (byte[4] & 0x01)
 966                 packet_id = V7_PACKET_ID_MULTI;
 967         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
 968                 packet_id = V7_PACKET_ID_NEW;
 969         else if (byte[1] == 0x00 && byte[4] == 0x00)
 970                 packet_id = V7_PACKET_ID_IDLE;
 971         else
 972                 packet_id = V7_PACKET_ID_UNKNOWN;
 973
 974         return packet_id;
 975 }
 976
 977 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
 978                                           unsigned char *pkt,
 979                                           unsigned char pkt_id)
 980 {
 981         mt[0].x = ((pkt[2] & 0x80) << 4);
 982         mt[0].x |= ((pkt[2] & 0x3F) << 5);
 983         mt[0].x |= ((pkt[3] & 0x30) >> 1);
 984         mt[0].x |= (pkt[3] & 0x07);
 985         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
 986
 987         mt[1].x = ((pkt[3] & 0x80) << 4);
 988         mt[1].x |= ((pkt[4] & 0x80) << 3);
 989         mt[1].x |= ((pkt[4] & 0x3F) << 4);
 990         mt[1].y = ((pkt[5] & 0x80) << 3);
 991         mt[1].y |= ((pkt[5] & 0x3F) << 4);
 992
 993         switch (pkt_id) {
 994         case V7_PACKET_ID_TWO:
 995                 mt[1].x &= ~0x000F;
 996                 mt[1].y |= 0x000F;
 997                 /* Detect false-postive touches where x & y report max value */
 998                 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
 999                         mt[1].x = 0;
1000                         /* y gets set to 0 at the end of this function */
1001                 }
1002                 break;
1003
1004         case V7_PACKET_ID_MULTI:
1005                 mt[1].x &= ~0x003F;
1006                 mt[1].y &= ~0x0020;
1007                 mt[1].y |= ((pkt[4] & 0x02) << 4);
1008                 mt[1].y |= 0x001F;
1009                 break;
1010
1011         case V7_PACKET_ID_NEW:
1012                 mt[1].x &= ~0x003F;
1013                 mt[1].x |= (pkt[0] & 0x20);
1014                 mt[1].y |= 0x000F;
1015                 break;
1016         }
1017
1018         mt[0].y = 0x7FF - mt[0].y;
1019         mt[1].y = 0x7FF - mt[1].y;
1020 }
1021
1022 static int alps_get_mt_count(struct input_mt_pos *mt)
1023 {
1024         int i, fingers = 0;
1025
1026         for (i = 0; i < MAX_TOUCHES; i++) {
1027                 if (mt[i].x != 0 || mt[i].y != 0)
1028                         fingers++;
1029         }
1030
1031         return fingers;
1032 }
1033
1034 static int alps_decode_packet_v7(struct alps_fields *f,
1035                                   unsigned char *p,
1036                                   struct psmouse *psmouse)
1037 {
1038         struct alps_data *priv = psmouse->private;
1039         unsigned char pkt_id;
1040
1041         pkt_id = alps_get_packet_id_v7(p);
1042         if (pkt_id == V7_PACKET_ID_IDLE)
1043                 return 0;
1044         if (pkt_id == V7_PACKET_ID_UNKNOWN)
1045                 return -1;
1046         /*
1047          * NEW packets are send to indicate a discontinuity in the finger
1048          * coordinate reporting. Specifically a finger may have moved from
1049          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
1050          * us.
1051          *
1052          * NEW packets have 3 problems:
1053          * 1) They do not contain middle / right button info (on non clickpads)
1054          *    this can be worked around by preserving the old button state
1055          * 2) They do not contain an accurate fingercount, and they are
1056          *    typically send when the number of fingers changes. We cannot use
1057          *    the old finger count as that may mismatch with the amount of
1058          *    touch coordinates we've available in the NEW packet
1059          * 3) Their x data for the second touch is inaccurate leading to
1060          *    a possible jump of the x coordinate by 16 units when the first
1061          *    non NEW packet comes in
1062          * Since problems 2 & 3 cannot be worked around, just ignore them.
1063          */
1064         if (pkt_id == V7_PACKET_ID_NEW)
1065                 return 1;
1066
1067         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1068
1069         if (pkt_id == V7_PACKET_ID_TWO)
1070                 f->fingers = alps_get_mt_count(f->mt);
1071         else /* pkt_id == V7_PACKET_ID_MULTI */
1072                 f->fingers = 3 + (p[5] & 0x03);
1073
1074         f->left = (p[0] & 0x80) >> 7;
1075         if (priv->flags & ALPS_BUTTONPAD) {
1076                 if (p[0] & 0x20)
1077                         f->fingers++;
1078                 if (p[0] & 0x10)
1079                         f->fingers++;
1080         } else {
1081                 f->right = (p[0] & 0x20) >> 5;
1082                 f->middle = (p[0] & 0x10) >> 4;
1083         }
1084
1085         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1086         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1087                 f->mt[0].x = f->mt[1].x;
1088                 f->mt[0].y = f->mt[1].y;
1089                 f->mt[1].x = 0;
1090                 f->mt[1].y = 0;
1091         }
1092
1093         return 0;
1094 }
1095
1096 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1097 {
1098         struct alps_data *priv = psmouse->private;
1099         unsigned char *packet = psmouse->packet;
1100         struct input_dev *dev2 = priv->dev2;
1101         int x, y, z, left, right, middle;
1102
1103         /* It should be a DualPoint when received trackstick packet */
1104         if (!(priv->flags & ALPS_DUALPOINT)) {
1105                 psmouse_warn(psmouse,
1106                              "Rejected trackstick packet from non DualPoint device");
1107                 return;
1108         }
1109
1110         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1111         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1112             ((packet[3] & 0x20) << 1);
1113         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1114
1115         left = (packet[1] & 0x01);
1116         right = (packet[1] & 0x02) >> 1;
1117         middle = (packet[1] & 0x04) >> 2;
1118
1119         input_report_rel(dev2, REL_X, (char)x);
1120         input_report_rel(dev2, REL_Y, -((char)y));
1121
1122         input_report_key(dev2, BTN_LEFT, left);
1123         input_report_key(dev2, BTN_RIGHT, right);
1124         input_report_key(dev2, BTN_MIDDLE, middle);
1125
1126         input_sync(dev2);
1127 }
1128
1129 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1130 {
1131         struct alps_data *priv = psmouse->private;
1132         struct input_dev *dev = psmouse->dev;
1133         struct alps_fields *f = &priv->f;
1134
1135         memset(f, 0, sizeof(*f));
1136
1137         if (priv->decode_fields(f, psmouse->packet, psmouse))
1138                 return;
1139
1140         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1141
1142         input_mt_report_finger_count(dev, f->fingers);
1143
1144         input_report_key(dev, BTN_LEFT, f->left);
1145         input_report_key(dev, BTN_RIGHT, f->right);
1146         input_report_key(dev, BTN_MIDDLE, f->middle);
1147
1148         input_sync(dev);
1149 }
1150
1151 static void alps_process_packet_v7(struct psmouse *psmouse)
1152 {
1153         unsigned char *packet = psmouse->packet;
1154
1155         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1156                 alps_process_trackstick_packet_v7(psmouse);
1157         else
1158                 alps_process_touchpad_packet_v7(psmouse);
1159 }
1160
1161 static enum SS4_PACKET_ID alps_get_pkt_id_ss4_v2(unsigned char *byte)
1162 {
1163         enum SS4_PACKET_ID pkt_id = SS4_PACKET_ID_IDLE;
1164
1165         switch (byte[3] & 0x30) {
1166         case 0x00:
1167                 if (SS4_IS_IDLE_V2(byte)) {
1168                         pkt_id = SS4_PACKET_ID_IDLE;
1169                 } else {
1170                         pkt_id = SS4_PACKET_ID_ONE;
1171                 }
1172                 break;
1173         case 0x10:
1174                 /* two-finger finger positions */
1175                 pkt_id = SS4_PACKET_ID_TWO;
1176                 break;
1177         case 0x20:
1178                 /* stick pointer */
1179                 pkt_id = SS4_PACKET_ID_STICK;
1180                 break;
1181         case 0x30:
1182                 /* third and fourth finger positions */
1183                 pkt_id = SS4_PACKET_ID_MULTI;
1184                 break;
1185         }
1186
1187         return pkt_id;
1188 }
1189
1190 static int alps_decode_ss4_v2(struct alps_fields *f,
1191                               unsigned char *p, struct psmouse *psmouse)
1192 {
1193         struct alps_data *priv = psmouse->private;
1194         enum SS4_PACKET_ID pkt_id;
1195         unsigned int no_data_x, no_data_y;
1196
1197         pkt_id = alps_get_pkt_id_ss4_v2(p);
1198
1199         /* Current packet is 1Finger coordinate packet */
1200         switch (pkt_id) {
1201         case SS4_PACKET_ID_ONE:
1202                 f->mt[0].x = SS4_1F_X_V2(p);
1203                 f->mt[0].y = SS4_1F_Y_V2(p);
1204                 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1205                 /*
1206                  * When a button is held the device will give us events
1207                  * with x, y, and pressure of 0. This causes annoying jumps
1208                  * if a touch is released while the button is held.
1209                  * Handle this by claiming zero contacts.
1210                  */
1211                 f->fingers = f->pressure > 0 ? 1 : 0;
1212                 f->first_mp = 0;
1213                 f->is_mp = 0;
1214                 break;
1215
1216         case SS4_PACKET_ID_TWO:
1217                 if (priv->flags & ALPS_BUTTONPAD) {
1218                         f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1219                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1220                         f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1221                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1222                 } else {
1223                         f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1224                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1225                         f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1226                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1227                 }
1228                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1229
1230                 if (SS4_IS_MF_CONTINUE(p)) {
1231                         f->first_mp = 1;
1232                 } else {
1233                         f->fingers = 2;
1234                         f->first_mp = 0;
1235                 }
1236                 f->is_mp = 0;
1237
1238                 break;
1239
1240         case SS4_PACKET_ID_MULTI:
1241                 if (priv->flags & ALPS_BUTTONPAD) {
1242                         f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1243                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1244                         f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1245                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1246                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1247                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1248                 } else {
1249                         f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1250                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1251                         f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1252                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1253                         no_data_x = SS4_MFPACKET_NO_AX;
1254                         no_data_y = SS4_MFPACKET_NO_AY;
1255                 }
1256
1257                 f->first_mp = 0;
1258                 f->is_mp = 1;
1259
1260                 if (SS4_IS_5F_DETECTED(p)) {
1261                         f->fingers = 5;
1262                 } else if (f->mt[3].x == no_data_x &&
1263                              f->mt[3].y == no_data_y) {
1264                         f->mt[3].x = 0;
1265                         f->mt[3].y = 0;
1266                         f->fingers = 3;
1267                 } else {
1268                         f->fingers = 4;
1269                 }
1270                 break;
1271
1272         case SS4_PACKET_ID_STICK:
1273                 /*
1274                  * x, y, and pressure are decoded in
1275                  * alps_process_packet_ss4_v2()
1276                  */
1277                 f->first_mp = 0;
1278                 f->is_mp = 0;
1279                 break;
1280
1281         case SS4_PACKET_ID_IDLE:
1282         default:
1283                 memset(f, 0, sizeof(struct alps_fields));
1284                 break;
1285         }
1286
1287         /* handle buttons */
1288         if (pkt_id == SS4_PACKET_ID_STICK) {
1289                 f->ts_left = !!(SS4_BTN_V2(p) & 0x01);
1290                 f->ts_right = !!(SS4_BTN_V2(p) & 0x02);
1291                 f->ts_middle = !!(SS4_BTN_V2(p) & 0x04);
1292         } else {
1293                 f->left = !!(SS4_BTN_V2(p) & 0x01);
1294                 if (!(priv->flags & ALPS_BUTTONPAD)) {
1295                         f->right = !!(SS4_BTN_V2(p) & 0x02);
1296                         f->middle = !!(SS4_BTN_V2(p) & 0x04);
1297                 }
1298         }
1299
1300         return 0;
1301 }
1302
1303 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1304 {
1305         struct alps_data *priv = psmouse->private;
1306         unsigned char *packet = psmouse->packet;
1307         struct input_dev *dev = psmouse->dev;
1308         struct input_dev *dev2 = priv->dev2;
1309         struct alps_fields *f = &priv->f;
1310
1311         memset(f, 0, sizeof(struct alps_fields));
1312         priv->decode_fields(f, packet, psmouse);
1313         if (priv->multi_packet) {
1314                 /*
1315                  * Sometimes the first packet will indicate a multi-packet
1316                  * sequence, but sometimes the next multi-packet would not
1317                  * come. Check for this, and when it happens process the
1318                  * position packet as usual.
1319                  */
1320                 if (f->is_mp) {
1321                         /* Now process the 1st packet */
1322                         priv->decode_fields(f, priv->multi_data, psmouse);
1323                 } else {
1324                         priv->multi_packet = 0;
1325                 }
1326         }
1327
1328         /*
1329          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1330          * When it is set, it means 2nd packet comes without 1st packet come.
1331          */
1332         if (f->is_mp)
1333                 return;
1334
1335         /* Save the first packet */
1336         if (!priv->multi_packet && f->first_mp) {
1337                 priv->multi_packet = 1;
1338                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1339                 return;
1340         }
1341
1342         priv->multi_packet = 0;
1343
1344         /* Report trackstick */
1345         if (alps_get_pkt_id_ss4_v2(packet) == SS4_PACKET_ID_STICK) {
1346                 if (!(priv->flags & ALPS_DUALPOINT)) {
1347                         psmouse_warn(psmouse,
1348                                      "Rejected trackstick packet from non DualPoint device");
1349                         return;
1350                 }
1351
1352                 input_report_rel(dev2, REL_X, SS4_TS_X_V2(packet));
1353                 input_report_rel(dev2, REL_Y, SS4_TS_Y_V2(packet));
1354                 input_report_abs(dev2, ABS_PRESSURE, SS4_TS_Z_V2(packet));
1355
1356                 input_report_key(dev2, BTN_LEFT, f->ts_left);
1357                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
1358                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
1359
1360                 input_sync(dev2);
1361                 return;
1362         }
1363
1364         /* Report touchpad */
1365         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1366
1367         input_mt_report_finger_count(dev, f->fingers);
1368
1369         input_report_key(dev, BTN_LEFT, f->left);
1370         input_report_key(dev, BTN_RIGHT, f->right);
1371         input_report_key(dev, BTN_MIDDLE, f->middle);
1372
1373         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1374         input_sync(dev);
1375 }
1376
1377 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1378 {
1379         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1380                 return false;
1381         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1382                 return false;
1383         return true;
1384 }
1385
1386 static DEFINE_MUTEX(alps_mutex);
1387
1388 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1389 {
1390         struct alps_data *priv =
1391                 container_of(work, struct alps_data, dev3_register_work.work);
1392         struct psmouse *psmouse = priv->psmouse;
1393         struct input_dev *dev3;
1394         int error = 0;
1395
1396         mutex_lock(&alps_mutex);
1397
1398         if (priv->dev3)
1399                 goto out;
1400
1401         dev3 = input_allocate_device();
1402         if (!dev3) {
1403                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1404                 error = -ENOMEM;
1405                 goto out;
1406         }
1407
1408         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1409                  psmouse->ps2dev.serio->phys,
1410                  (priv->dev2 ? "input2" : "input1"));
1411         dev3->phys = priv->phys3;
1412
1413         /*
1414          * format of input device name is: "protocol vendor name"
1415          * see function psmouse_switch_protocol() in psmouse-base.c
1416          */
1417         dev3->name = "PS/2 ALPS Mouse";
1418
1419         dev3->id.bustype = BUS_I8042;
1420         dev3->id.vendor  = 0x0002;
1421         dev3->id.product = PSMOUSE_PS2;
1422         dev3->id.version = 0x0000;
1423         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1424
1425         input_set_capability(dev3, EV_REL, REL_X);
1426         input_set_capability(dev3, EV_REL, REL_Y);
1427         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1428         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1429         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1430
1431         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1432
1433         error = input_register_device(dev3);
1434         if (error) {
1435                 psmouse_err(psmouse,
1436                             "failed to register secondary device: %d\n",
1437                             error);
1438                 input_free_device(dev3);
1439                 goto out;
1440         }
1441
1442         priv->dev3 = dev3;
1443
1444 out:
1445         /*
1446          * Save the error code so that we can detect that we
1447          * already tried to create the device.
1448          */
1449         if (error)
1450                 priv->dev3 = ERR_PTR(error);
1451
1452         mutex_unlock(&alps_mutex);
1453 }
1454
1455 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1456                                         unsigned char packet[],
1457                                         bool report_buttons)
1458 {
1459         struct alps_data *priv = psmouse->private;
1460         struct input_dev *dev, *dev2 = NULL;
1461
1462         /* Figure out which device to use to report the bare packet */
1463         if (priv->proto_version == ALPS_PROTO_V2 &&
1464             (priv->flags & ALPS_DUALPOINT)) {
1465                 /* On V2 devices the DualPoint Stick reports bare packets */
1466                 dev = priv->dev2;
1467                 dev2 = psmouse->dev;
1468         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1469                 /* Register dev3 mouse if we received PS/2 packet first time */
1470                 if (!IS_ERR(priv->dev3))
1471                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1472                                            0);
1473                 return;
1474         } else {
1475                 dev = priv->dev3;
1476         }
1477
1478         if (report_buttons)
1479                 alps_report_buttons(dev, dev2,
1480                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1481
1482         input_report_rel(dev, REL_X,
1483                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1484         input_report_rel(dev, REL_Y,
1485                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1486
1487         input_sync(dev);
1488 }
1489
1490 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1491 {
1492         struct alps_data *priv = psmouse->private;
1493
1494         if (psmouse->pktcnt < 6)
1495                 return PSMOUSE_GOOD_DATA;
1496
1497         if (psmouse->pktcnt == 6) {
1498                 /*
1499                  * Start a timer to flush the packet if it ends up last
1500                  * 6-byte packet in the stream. Timer needs to fire
1501                  * psmouse core times out itself. 20 ms should be enough
1502                  * to decide if we are getting more data or not.
1503                  */
1504                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1505                 return PSMOUSE_GOOD_DATA;
1506         }
1507
1508         del_timer(&priv->timer);
1509
1510         if (psmouse->packet[6] & 0x80) {
1511
1512                 /*
1513                  * Highest bit is set - that means we either had
1514                  * complete ALPS packet and this is start of the
1515                  * next packet or we got garbage.
1516                  */
1517
1518                 if (((psmouse->packet[3] |
1519                       psmouse->packet[4] |
1520                       psmouse->packet[5]) & 0x80) ||
1521                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1522                         psmouse_dbg(psmouse,
1523                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1524                                     psmouse->packet + 3);
1525                         return PSMOUSE_BAD_DATA;
1526                 }
1527
1528                 priv->process_packet(psmouse);
1529
1530                 /* Continue with the next packet */
1531                 psmouse->packet[0] = psmouse->packet[6];
1532                 psmouse->pktcnt = 1;
1533
1534         } else {
1535
1536                 /*
1537                  * High bit is 0 - that means that we indeed got a PS/2
1538                  * packet in the middle of ALPS packet.
1539                  *
1540                  * There is also possibility that we got 6-byte ALPS
1541                  * packet followed  by 3-byte packet from trackpoint. We
1542                  * can not distinguish between these 2 scenarios but
1543                  * because the latter is unlikely to happen in course of
1544                  * normal operation (user would need to press all
1545                  * buttons on the pad and start moving trackpoint
1546                  * without touching the pad surface) we assume former.
1547                  * Even if we are wrong the wost thing that would happen
1548                  * the cursor would jump but we should not get protocol
1549                  * de-synchronization.
1550                  */
1551
1552                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1553                                             false);
1554
1555                 /*
1556                  * Continue with the standard ALPS protocol handling,
1557                  * but make sure we won't process it as an interleaved
1558                  * packet again, which may happen if all buttons are
1559                  * pressed. To avoid this let's reset the 4th bit which
1560                  * is normally 1.
1561                  */
1562                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1563                 psmouse->pktcnt = 4;
1564         }
1565
1566         return PSMOUSE_GOOD_DATA;
1567 }
1568
1569 static void alps_flush_packet(unsigned long data)
1570 {
1571         struct psmouse *psmouse = (struct psmouse *)data;
1572         struct alps_data *priv = psmouse->private;
1573
1574         serio_pause_rx(psmouse->ps2dev.serio);
1575
1576         if (psmouse->pktcnt == psmouse->pktsize) {
1577
1578                 /*
1579                  * We did not any more data in reasonable amount of time.
1580                  * Validate the last 3 bytes and process as a standard
1581                  * ALPS packet.
1582                  */
1583                 if ((psmouse->packet[3] |
1584                      psmouse->packet[4] |
1585                      psmouse->packet[5]) & 0x80) {
1586                         psmouse_dbg(psmouse,
1587                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1588                                     psmouse->packet + 3);
1589                 } else {
1590                         priv->process_packet(psmouse);
1591                 }
1592                 psmouse->pktcnt = 0;
1593         }
1594
1595         serio_continue_rx(psmouse->ps2dev.serio);
1596 }
1597
1598 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1599 {
1600         struct alps_data *priv = psmouse->private;
1601
1602         /*
1603          * Check if we are dealing with a bare PS/2 packet, presumably from
1604          * a device connected to the external PS/2 port. Because bare PS/2
1605          * protocol does not have enough constant bits to self-synchronize
1606          * properly we only do this if the device is fully synchronized.
1607          * Can not distinguish V8's first byte from PS/2 packet's
1608          */
1609         if (priv->proto_version != ALPS_PROTO_V8 &&
1610             !psmouse->out_of_sync_cnt &&
1611             (psmouse->packet[0] & 0xc8) == 0x08) {
1612
1613                 if (psmouse->pktcnt == 3) {
1614                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1615                                                     true);
1616                         return PSMOUSE_FULL_PACKET;
1617                 }
1618                 return PSMOUSE_GOOD_DATA;
1619         }
1620
1621         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1622
1623         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1624             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1625                 return alps_handle_interleaved_ps2(psmouse);
1626         }
1627
1628         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1629                 psmouse_dbg(psmouse,
1630                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1631                             psmouse->packet[0], priv->mask0, priv->byte0);
1632                 return PSMOUSE_BAD_DATA;
1633         }
1634
1635         /* Bytes 2 - pktsize should have 0 in the highest bit */
1636         if (priv->proto_version < ALPS_PROTO_V5 &&
1637             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1638             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1639                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1640                             psmouse->pktcnt - 1,
1641                             psmouse->packet[psmouse->pktcnt - 1]);
1642
1643                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1644                     psmouse->pktcnt == psmouse->pktsize) {
1645                         /*
1646                          * Some Dell boxes, such as Latitude E6440 or E7440
1647                          * with closed lid, quite often smash last byte of
1648                          * otherwise valid packet with 0xff. Given that the
1649                          * next packet is very likely to be valid let's
1650                          * report PSMOUSE_FULL_PACKET but not process data,
1651                          * rather than reporting PSMOUSE_BAD_DATA and
1652                          * filling the logs.
1653                          */
1654                         return PSMOUSE_FULL_PACKET;
1655                 }
1656
1657                 return PSMOUSE_BAD_DATA;
1658         }
1659
1660         if ((priv->proto_version == ALPS_PROTO_V7 &&
1661                         !alps_is_valid_package_v7(psmouse)) ||
1662             (priv->proto_version == ALPS_PROTO_V8 &&
1663                         !alps_is_valid_package_ss4_v2(psmouse))) {
1664                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1665                             psmouse->pktcnt - 1,
1666                             psmouse->packet[psmouse->pktcnt - 1]);
1667                 return PSMOUSE_BAD_DATA;
1668         }
1669
1670         if (psmouse->pktcnt == psmouse->pktsize) {
1671                 priv->process_packet(psmouse);
1672                 return PSMOUSE_FULL_PACKET;
1673         }
1674
1675         return PSMOUSE_GOOD_DATA;
1676 }
1677
1678 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1679 {
1680         struct ps2dev *ps2dev = &psmouse->ps2dev;
1681         struct alps_data *priv = psmouse->private;
1682         int command;
1683         unsigned char *param;
1684         unsigned char dummy[4];
1685
1686         BUG_ON(nibble > 0xf);
1687
1688         command = priv->nibble_commands[nibble].command;
1689         param = (command & 0x0f00) ?
1690                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1691
1692         if (ps2_command(ps2dev, param, command))
1693                 return -1;
1694
1695         return 0;
1696 }
1697
1698 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1699 {
1700         struct ps2dev *ps2dev = &psmouse->ps2dev;
1701         struct alps_data *priv = psmouse->private;
1702         int i, nibble;
1703
1704         if (ps2_command(ps2dev, NULL, priv->addr_command))
1705                 return -1;
1706
1707         for (i = 12; i >= 0; i -= 4) {
1708                 nibble = (addr >> i) & 0xf;
1709                 if (alps_command_mode_send_nibble(psmouse, nibble))
1710                         return -1;
1711         }
1712
1713         return 0;
1714 }
1715
1716 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1717 {
1718         struct ps2dev *ps2dev = &psmouse->ps2dev;
1719         unsigned char param[4];
1720
1721         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1722                 return -1;
1723
1724         /*
1725          * The address being read is returned in the first two bytes
1726          * of the result. Check that this address matches the expected
1727          * address.
1728          */
1729         if (addr != ((param[0] << 8) | param[1]))
1730                 return -1;
1731
1732         return param[2];
1733 }
1734
1735 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1736 {
1737         if (alps_command_mode_set_addr(psmouse, addr))
1738                 return -1;
1739         return __alps_command_mode_read_reg(psmouse, addr);
1740 }
1741
1742 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1743 {
1744         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1745                 return -1;
1746         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1747                 return -1;
1748         return 0;
1749 }
1750
1751 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1752                                        u8 value)
1753 {
1754         if (alps_command_mode_set_addr(psmouse, addr))
1755                 return -1;
1756         return __alps_command_mode_write_reg(psmouse, value);
1757 }
1758
1759 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1760                         int repeated_command, unsigned char *param)
1761 {
1762         struct ps2dev *ps2dev = &psmouse->ps2dev;
1763
1764         param[0] = 0;
1765         if (init_command && ps2_command(ps2dev, param, init_command))
1766                 return -EIO;
1767
1768         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1769             ps2_command(ps2dev,  NULL, repeated_command) ||
1770             ps2_command(ps2dev,  NULL, repeated_command))
1771                 return -EIO;
1772
1773         param[0] = param[1] = param[2] = 0xff;
1774         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1775                 return -EIO;
1776
1777         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1778                     repeated_command, param);
1779         return 0;
1780 }
1781
1782 static bool alps_check_valid_firmware_id(unsigned char id[])
1783 {
1784         if (id[0] == 0x73)
1785                 return true;
1786
1787         if (id[0] == 0x88 &&
1788             (id[1] == 0x07 ||
1789              id[1] == 0x08 ||
1790              (id[1] & 0xf0) == 0xb0 ||
1791              (id[1] & 0xf0) == 0xc0)) {
1792                 return true;
1793         }
1794
1795         return false;
1796 }
1797
1798 static int alps_enter_command_mode(struct psmouse *psmouse)
1799 {
1800         unsigned char param[4];
1801
1802         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1803                 psmouse_err(psmouse, "failed to enter command mode\n");
1804                 return -1;
1805         }
1806
1807         if (!alps_check_valid_firmware_id(param)) {
1808                 psmouse_dbg(psmouse,
1809                             "unknown response while entering command mode\n");
1810                 return -1;
1811         }
1812         return 0;
1813 }
1814
1815 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1816 {
1817         struct ps2dev *ps2dev = &psmouse->ps2dev;
1818         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1819                 return -1;
1820         return 0;
1821 }
1822
1823 /*
1824  * For DualPoint devices select the device that should respond to
1825  * subsequent commands. It looks like glidepad is behind stickpointer,
1826  * I'd thought it would be other way around...
1827  */
1828 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1829 {
1830         struct ps2dev *ps2dev = &psmouse->ps2dev;
1831         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1832
1833         if (ps2_command(ps2dev, NULL, cmd) ||
1834             ps2_command(ps2dev, NULL, cmd) ||
1835             ps2_command(ps2dev, NULL, cmd) ||
1836             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1837                 return -1;
1838
1839         /* we may get 3 more bytes, just ignore them */
1840         ps2_drain(ps2dev, 3, 100);
1841
1842         return 0;
1843 }
1844
1845 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1846 {
1847         struct ps2dev *ps2dev = &psmouse->ps2dev;
1848
1849         /* Try ALPS magic knock - 4 disable before enable */
1850         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1851             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1852             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1853             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1854             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1855                 return -1;
1856
1857         /*
1858          * Switch mouse to poll (remote) mode so motion data will not
1859          * get in our way
1860          */
1861         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1862 }
1863
1864 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1865 {
1866         int i, nibble;
1867
1868         /*
1869          * b0-b11 are valid bits, send sequence is inverse.
1870          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1871          */
1872         for (i = 0; i <= 8; i += 4) {
1873                 nibble = (word >> i) & 0xf;
1874                 if (alps_command_mode_send_nibble(psmouse, nibble))
1875                         return -1;
1876         }
1877
1878         return 0;
1879 }
1880
1881 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1882                                        u16 addr, u16 value)
1883 {
1884         struct ps2dev *ps2dev = &psmouse->ps2dev;
1885
1886         /* 0x0A0 is the command to write the word */
1887         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1888             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1889             alps_monitor_mode_send_word(psmouse, addr) ||
1890             alps_monitor_mode_send_word(psmouse, value) ||
1891             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1892                 return -1;
1893
1894         return 0;
1895 }
1896
1897 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1898 {
1899         struct ps2dev *ps2dev = &psmouse->ps2dev;
1900
1901         if (enable) {
1902                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1903                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1904                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1905                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1906                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1907                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1908                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1909                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1910                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1911                         return -1;
1912         } else {
1913                 /* EC to exit monitor mode */
1914                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1915                         return -1;
1916         }
1917
1918         return 0;
1919 }
1920
1921 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1922 {
1923         u16 reg_val = 0x181;
1924         int ret = -1;
1925
1926         /* enter monitor mode, to write the register */
1927         if (alps_monitor_mode(psmouse, true))
1928                 return -1;
1929
1930         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1931
1932         if (alps_monitor_mode(psmouse, false))
1933                 ret = -1;
1934
1935         return ret;
1936 }
1937
1938 static int alps_get_status(struct psmouse *psmouse, char *param)
1939 {
1940         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1941         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1942                 return -1;
1943
1944         return 0;
1945 }
1946
1947 /*
1948  * Turn touchpad tapping on or off. The sequences are:
1949  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1950  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1951  * My guess that 0xE9 (GetInfo) is here as a sync point.
1952  * For models that also have stickpointer (DualPoints) its tapping
1953  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1954  * we don't fiddle with it.
1955  */
1956 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1957 {
1958         struct ps2dev *ps2dev = &psmouse->ps2dev;
1959         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1960         unsigned char tap_arg = enable ? 0x0A : 0x00;
1961         unsigned char param[4];
1962
1963         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1964             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1965             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1966             ps2_command(ps2dev, &tap_arg, cmd))
1967                 return -1;
1968
1969         if (alps_get_status(psmouse, param))
1970                 return -1;
1971
1972         return 0;
1973 }
1974
1975 /*
1976  * alps_poll() - poll the touchpad for current motion packet.
1977  * Used in resync.
1978  */
1979 static int alps_poll(struct psmouse *psmouse)
1980 {
1981         struct alps_data *priv = psmouse->private;
1982         unsigned char buf[sizeof(psmouse->packet)];
1983         bool poll_failed;
1984
1985         if (priv->flags & ALPS_PASS)
1986                 alps_passthrough_mode_v2(psmouse, true);
1987
1988         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1989                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1990
1991         if (priv->flags & ALPS_PASS)
1992                 alps_passthrough_mode_v2(psmouse, false);
1993
1994         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1995                 return -1;
1996
1997         if ((psmouse->badbyte & 0xc8) == 0x08) {
1998 /*
1999  * Poll the track stick ...
2000  */
2001                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
2002                         return -1;
2003         }
2004
2005         memcpy(psmouse->packet, buf, sizeof(buf));
2006         return 0;
2007 }
2008
2009 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
2010 {
2011         struct alps_data *priv = psmouse->private;
2012
2013         if ((priv->flags & ALPS_PASS) &&
2014             alps_passthrough_mode_v2(psmouse, true)) {
2015                 return -1;
2016         }
2017
2018         if (alps_tap_mode(psmouse, true)) {
2019                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
2020                 return -1;
2021         }
2022
2023         if (alps_absolute_mode_v1_v2(psmouse)) {
2024                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2025                 return -1;
2026         }
2027
2028         if ((priv->flags & ALPS_PASS) &&
2029             alps_passthrough_mode_v2(psmouse, false)) {
2030                 return -1;
2031         }
2032
2033         /* ALPS needs stream mode, otherwise it won't report any data */
2034         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
2035                 psmouse_err(psmouse, "Failed to enable stream mode\n");
2036                 return -1;
2037         }
2038
2039         return 0;
2040 }
2041
2042 static int alps_hw_init_v6(struct psmouse *psmouse)
2043 {
2044         unsigned char param[2] = {0xC8, 0x14};
2045
2046         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
2047         if (alps_passthrough_mode_v2(psmouse, true))
2048                 return -1;
2049
2050         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2051             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2052             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2053             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2054             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2055                 return -1;
2056
2057         if (alps_passthrough_mode_v2(psmouse, false))
2058                 return -1;
2059
2060         if (alps_absolute_mode_v6(psmouse)) {
2061                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2062                 return -1;
2063         }
2064
2065         return 0;
2066 }
2067
2068 /*
2069  * Enable or disable passthrough mode to the trackstick.
2070  */
2071 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
2072                                     int reg_base, bool enable)
2073 {
2074         int reg_val, ret = -1;
2075
2076         if (alps_enter_command_mode(psmouse))
2077                 return -1;
2078
2079         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
2080         if (reg_val == -1)
2081                 goto error;
2082
2083         if (enable)
2084                 reg_val |= 0x01;
2085         else
2086                 reg_val &= ~0x01;
2087
2088         ret = __alps_command_mode_write_reg(psmouse, reg_val);
2089
2090 error:
2091         if (alps_exit_command_mode(psmouse))
2092                 ret = -1;
2093         return ret;
2094 }
2095
2096 /* Must be in command mode when calling this function */
2097 static int alps_absolute_mode_v3(struct psmouse *psmouse)
2098 {
2099         int reg_val;
2100
2101         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2102         if (reg_val == -1)
2103                 return -1;
2104
2105         reg_val |= 0x06;
2106         if (__alps_command_mode_write_reg(psmouse, reg_val))
2107                 return -1;
2108
2109         return 0;
2110 }
2111
2112 static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base)
2113 {
2114         int ret = -EIO, reg_val;
2115
2116         if (alps_enter_command_mode(psmouse))
2117                 goto error;
2118
2119         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2120         if (reg_val == -1)
2121                 goto error;
2122
2123         /* bit 7: trackstick is present */
2124         ret = reg_val & 0x80 ? 0 : -ENODEV;
2125
2126 error:
2127         alps_exit_command_mode(psmouse);
2128         return ret;
2129 }
2130
2131 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2132 {
2133         struct ps2dev *ps2dev = &psmouse->ps2dev;
2134         int ret = 0;
2135         unsigned char param[4];
2136
2137         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2138                 return -EIO;
2139
2140         /*
2141          * E7 report for the trackstick
2142          *
2143          * There have been reports of failures to seem to trace back
2144          * to the above trackstick check failing. When these occur
2145          * this E7 report fails, so when that happens we continue
2146          * with the assumption that there isn't a trackstick after
2147          * all.
2148          */
2149         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2150                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2151                 ret = -ENODEV;
2152         } else {
2153                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2154
2155                 /*
2156                  * Not sure what this does, but it is absolutely
2157                  * essential. Without it, the touchpad does not
2158                  * work at all and the trackstick just emits normal
2159                  * PS/2 packets.
2160                  */
2161                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2162                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2163                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2164                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2165                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2166                         psmouse_err(psmouse,
2167                                     "Error sending magic E6 sequence\n");
2168                         ret = -EIO;
2169                         goto error;
2170                 }
2171
2172                 /*
2173                  * This ensures the trackstick packets are in the format
2174                  * supported by this driver. If bit 1 isn't set the packet
2175                  * format is different.
2176                  */
2177                 if (alps_enter_command_mode(psmouse) ||
2178                     alps_command_mode_write_reg(psmouse,
2179                                                 reg_base + 0x08, 0x82) ||
2180                     alps_exit_command_mode(psmouse))
2181                         ret = -EIO;
2182         }
2183
2184 error:
2185         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2186                 ret = -EIO;
2187
2188         return ret;
2189 }
2190
2191 static int alps_hw_init_v3(struct psmouse *psmouse)
2192 {
2193         struct alps_data *priv = psmouse->private;
2194         struct ps2dev *ps2dev = &psmouse->ps2dev;
2195         int reg_val;
2196         unsigned char param[4];
2197
2198         if ((priv->flags & ALPS_DUALPOINT) &&
2199             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2200                 goto error;
2201
2202         if (alps_enter_command_mode(psmouse) ||
2203             alps_absolute_mode_v3(psmouse)) {
2204                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2205                 goto error;
2206         }
2207
2208         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2209         if (reg_val == -1)
2210                 goto error;
2211         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2212                 goto error;
2213
2214         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2215         if (reg_val == -1)
2216                 goto error;
2217         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2218                 goto error;
2219
2220         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2221                 goto error;
2222         if (__alps_command_mode_write_reg(psmouse, 0x04))
2223                 goto error;
2224
2225         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2226                 goto error;
2227         if (__alps_command_mode_write_reg(psmouse, 0x03))
2228                 goto error;
2229
2230         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2231                 goto error;
2232         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2233                 goto error;
2234
2235         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2236                 goto error;
2237         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2238                 goto error;
2239
2240         alps_exit_command_mode(psmouse);
2241
2242         /* Set rate and enable data reporting */
2243         param[0] = 0x64;
2244         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2245             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2246                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2247                 return -1;
2248         }
2249
2250         return 0;
2251
2252 error:
2253         /*
2254          * Leaving the touchpad in command mode will essentially render
2255          * it unusable until the machine reboots, so exit it here just
2256          * to be safe
2257          */
2258         alps_exit_command_mode(psmouse);
2259         return -1;
2260 }
2261
2262 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2263 {
2264         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2265         struct alps_data *priv = psmouse->private;
2266
2267         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2268         if (reg < 0)
2269                 return reg;
2270
2271         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2272         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2273
2274         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2275         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2276
2277         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2278         if (reg < 0)
2279                 return reg;
2280
2281         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2282         x_electrode = 17 + x_electrode;
2283
2284         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2285         y_electrode = 13 + y_electrode;
2286
2287         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2288         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2289
2290         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2291         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2292
2293         psmouse_dbg(psmouse,
2294                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2295                     x_pitch, y_pitch, x_electrode, y_electrode,
2296                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2297
2298         return 0;
2299 }
2300
2301 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2302 {
2303         struct alps_data *priv = psmouse->private;
2304         struct ps2dev *ps2dev = &psmouse->ps2dev;
2305         int reg_val, ret = -1;
2306
2307         if (priv->flags & ALPS_DUALPOINT) {
2308                 reg_val = alps_setup_trackstick_v3(psmouse,
2309                                                    ALPS_REG_BASE_RUSHMORE);
2310                 if (reg_val == -EIO)
2311                         goto error;
2312         }
2313
2314         if (alps_enter_command_mode(psmouse) ||
2315             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2316             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2317                 goto error;
2318
2319         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2320                 goto error;
2321
2322         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2323         if (reg_val == -1)
2324                 goto error;
2325         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2326                 goto error;
2327
2328         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2329                 goto error;
2330
2331         /* enter absolute mode */
2332         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2333         if (reg_val == -1)
2334                 goto error;
2335         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2336                 goto error;
2337
2338         alps_exit_command_mode(psmouse);
2339         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2340
2341 error:
2342         alps_exit_command_mode(psmouse);
2343         return ret;
2344 }
2345
2346 /* Must be in command mode when calling this function */
2347 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2348 {
2349         int reg_val;
2350
2351         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2352         if (reg_val == -1)
2353                 return -1;
2354
2355         reg_val |= 0x02;
2356         if (__alps_command_mode_write_reg(psmouse, reg_val))
2357                 return -1;
2358
2359         return 0;
2360 }
2361
2362 static int alps_hw_init_v4(struct psmouse *psmouse)
2363 {
2364         struct ps2dev *ps2dev = &psmouse->ps2dev;
2365         unsigned char param[4];
2366
2367         if (alps_enter_command_mode(psmouse))
2368                 goto error;
2369
2370         if (alps_absolute_mode_v4(psmouse)) {
2371                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2372                 goto error;
2373         }
2374
2375         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2376                 goto error;
2377
2378         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2379                 goto error;
2380
2381         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2382                 goto error;
2383
2384         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2385                 goto error;
2386
2387         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2388                 goto error;
2389
2390         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2391                 goto error;
2392
2393         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2394                 goto error;
2395
2396         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2397                 goto error;
2398
2399         alps_exit_command_mode(psmouse);
2400
2401         /*
2402          * This sequence changes the output from a 9-byte to an
2403          * 8-byte format. All the same data seems to be present,
2404          * just in a more compact format.
2405          */
2406         param[0] = 0xc8;
2407         param[1] = 0x64;
2408         param[2] = 0x50;
2409         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2410             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2411             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2412             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2413                 return -1;
2414
2415         /* Set rate and enable data reporting */
2416         param[0] = 0x64;
2417         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2418             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2419                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2420                 return -1;
2421         }
2422
2423         return 0;
2424
2425 error:
2426         /*
2427          * Leaving the touchpad in command mode will essentially render
2428          * it unusable until the machine reboots, so exit it here just
2429          * to be safe
2430          */
2431         alps_exit_command_mode(psmouse);
2432         return -1;
2433 }
2434
2435 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2436                                       unsigned char index, unsigned char otp[])
2437 {
2438         struct ps2dev *ps2dev = &psmouse->ps2dev;
2439
2440         switch (index) {
2441         case 0:
2442                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2443                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2444                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2445                         return -1;
2446
2447                 break;
2448
2449         case 1:
2450                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2451                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2452                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2453                         return -1;
2454
2455                 break;
2456         }
2457
2458         return 0;
2459 }
2460
2461 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2462                                           struct alps_data *priv)
2463 {
2464         int num_x_electrode;
2465         int num_y_electrode;
2466         int x_pitch, y_pitch, x_phys, y_phys;
2467
2468         if (IS_SS4PLUS_DEV(priv->dev_id)) {
2469                 num_x_electrode =
2470                         SS4PLUS_NUMSENSOR_XOFFSET + (otp[0][2] & 0x0F);
2471                 num_y_electrode =
2472                         SS4PLUS_NUMSENSOR_YOFFSET + ((otp[0][2] >> 4) & 0x0F);
2473
2474                 priv->x_max =
2475                         (num_x_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2476                 priv->y_max =
2477                         (num_y_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2478
2479                 x_pitch = (otp[0][1] & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2480                 y_pitch = ((otp[0][1] >> 4) & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2481
2482         } else {
2483                 num_x_electrode =
2484                         SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2485                 num_y_electrode =
2486                         SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2487
2488                 priv->x_max =
2489                         (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2490                 priv->y_max =
2491                         (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2492
2493                 x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2494                 y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2495         }
2496
2497         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2498         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2499
2500         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2501         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2502
2503         return 0;
2504 }
2505
2506 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2507                                        struct alps_data *priv)
2508 {
2509         unsigned char is_btnless;
2510
2511         if (IS_SS4PLUS_DEV(priv->dev_id))
2512                 is_btnless = (otp[1][0] >> 1) & 0x01;
2513         else
2514                 is_btnless = (otp[1][1] >> 3) & 0x01;
2515
2516         if (is_btnless)
2517                 priv->flags |= ALPS_BUTTONPAD;
2518
2519         return 0;
2520 }
2521
2522 static int alps_update_dual_info_ss4_v2(unsigned char otp[][4],
2523                                        struct alps_data *priv)
2524 {
2525         bool is_dual = false;
2526
2527         if (IS_SS4PLUS_DEV(priv->dev_id))
2528                 is_dual = (otp[0][0] >> 4) & 0x01;
2529
2530         if (is_dual)
2531                 priv->flags |= ALPS_DUALPOINT |
2532                                         ALPS_DUALPOINT_WITH_PRESSURE;
2533
2534         return 0;
2535 }
2536
2537 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2538                                     struct alps_data *priv)
2539 {
2540         unsigned char otp[2][4];
2541
2542         memset(otp, 0, sizeof(otp));
2543
2544         if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2545             alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2546                 return -1;
2547
2548         alps_update_device_area_ss4_v2(otp, priv);
2549
2550         alps_update_btn_info_ss4_v2(otp, priv);
2551
2552         alps_update_dual_info_ss4_v2(otp, priv);
2553
2554         return 0;
2555 }
2556
2557 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2558                                         struct alps_data *priv)
2559 {
2560         struct ps2dev *ps2dev = &psmouse->ps2dev;
2561         unsigned char param[4] = {0};
2562         int num_x_electrode, num_y_electrode;
2563
2564         if (alps_enter_command_mode(psmouse))
2565                 return -1;
2566
2567         param[0] = 0x0a;
2568         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2569             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2570             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2571             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2572             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2573                 return -1;
2574
2575         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2576                 return -1;
2577
2578         /*
2579          * Dolphin's sensor line number is not fixed. It can be calculated
2580          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2581          * Further more, we can get device's x_max and y_max by multiplying
2582          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2583          *
2584          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2585          *      real sensor line number X = 11 + 8 = 19, and
2586          *      real sensor line number Y = 8 + 1 = 9.
2587          *      So, x_max = (19 - 1) * 64 = 1152, and
2588          *          y_max = (9 - 1) * 64 = 512.
2589          */
2590         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2591         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2592         priv->x_bits = num_x_electrode;
2593         priv->y_bits = num_y_electrode;
2594         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2595         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2596
2597         if (alps_exit_command_mode(psmouse))
2598                 return -1;
2599
2600         return 0;
2601 }
2602
2603 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2604 {
2605         struct ps2dev *ps2dev = &psmouse->ps2dev;
2606         unsigned char param[2];
2607
2608         /* This is dolphin "v1" as empirically defined by florin9doi */
2609         param[0] = 0x64;
2610         param[1] = 0x28;
2611
2612         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2613             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2614             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2615                 return -1;
2616
2617         return 0;
2618 }
2619
2620 static int alps_hw_init_v7(struct psmouse *psmouse)
2621 {
2622         struct ps2dev *ps2dev = &psmouse->ps2dev;
2623         int reg_val, ret = -1;
2624
2625         if (alps_enter_command_mode(psmouse) ||
2626             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2627                 goto error;
2628
2629         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2630                 goto error;
2631
2632         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2633                 goto error;
2634
2635         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2636         if (reg_val == -1)
2637                 goto error;
2638         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2639                 goto error;
2640
2641         alps_exit_command_mode(psmouse);
2642         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2643
2644 error:
2645         alps_exit_command_mode(psmouse);
2646         return ret;
2647 }
2648
2649 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2650 {
2651         struct ps2dev *ps2dev = &psmouse->ps2dev;
2652         char param[2] = {0x64, 0x28};
2653         int ret = -1;
2654
2655         /* enter absolute mode */
2656         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2657             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2658             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2659             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2660                 goto error;
2661         }
2662
2663         /* T.B.D. Decread noise packet number, delete in the future */
2664         if (alps_exit_command_mode(psmouse) ||
2665             alps_enter_command_mode(psmouse) ||
2666             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2667                 goto error;
2668         }
2669         alps_exit_command_mode(psmouse);
2670
2671         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2672
2673 error:
2674         alps_exit_command_mode(psmouse);
2675         return ret;
2676 }
2677
2678 static int alps_set_protocol(struct psmouse *psmouse,
2679                              struct alps_data *priv,
2680                              const struct alps_protocol_info *protocol)
2681 {
2682         psmouse->private = priv;
2683
2684         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2685
2686         priv->proto_version = protocol->version;
2687         priv->byte0 = protocol->byte0;
2688         priv->mask0 = protocol->mask0;
2689         priv->flags = protocol->flags;
2690
2691         priv->x_max = 2000;
2692         priv->y_max = 1400;
2693         priv->x_bits = 15;
2694         priv->y_bits = 11;
2695
2696         switch (priv->proto_version) {
2697         case ALPS_PROTO_V1:
2698         case ALPS_PROTO_V2:
2699                 priv->hw_init = alps_hw_init_v1_v2;
2700                 priv->process_packet = alps_process_packet_v1_v2;
2701                 priv->set_abs_params = alps_set_abs_params_st;
2702                 priv->x_max = 1023;
2703                 priv->y_max = 767;
2704                 if (dmi_check_system(alps_dmi_has_separate_stick_buttons))
2705                         priv->flags |= ALPS_STICK_BITS;
2706                 break;
2707
2708         case ALPS_PROTO_V3:
2709                 priv->hw_init = alps_hw_init_v3;
2710                 priv->process_packet = alps_process_packet_v3;
2711                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2712                 priv->decode_fields = alps_decode_pinnacle;
2713                 priv->nibble_commands = alps_v3_nibble_commands;
2714                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2715
2716                 if (alps_probe_trackstick_v3_v7(psmouse,
2717                                                 ALPS_REG_BASE_PINNACLE) < 0)
2718                         priv->flags &= ~ALPS_DUALPOINT;
2719
2720                 break;
2721
2722         case ALPS_PROTO_V3_RUSHMORE:
2723                 priv->hw_init = alps_hw_init_rushmore_v3;
2724                 priv->process_packet = alps_process_packet_v3;
2725                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2726                 priv->decode_fields = alps_decode_rushmore;
2727                 priv->nibble_commands = alps_v3_nibble_commands;
2728                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2729                 priv->x_bits = 16;
2730                 priv->y_bits = 12;
2731
2732                 if (alps_probe_trackstick_v3_v7(psmouse,
2733                                                 ALPS_REG_BASE_RUSHMORE) < 0)
2734                         priv->flags &= ~ALPS_DUALPOINT;
2735
2736                 break;
2737
2738         case ALPS_PROTO_V4:
2739                 priv->hw_init = alps_hw_init_v4;
2740                 priv->process_packet = alps_process_packet_v4;
2741                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2742                 priv->nibble_commands = alps_v4_nibble_commands;
2743                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2744                 break;
2745
2746         case ALPS_PROTO_V5:
2747                 priv->hw_init = alps_hw_init_dolphin_v1;
2748                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2749                 priv->decode_fields = alps_decode_dolphin;
2750                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2751                 priv->nibble_commands = alps_v3_nibble_commands;
2752                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2753                 priv->x_bits = 23;
2754                 priv->y_bits = 12;
2755
2756                 if (alps_dolphin_get_device_area(psmouse, priv))
2757                         return -EIO;
2758
2759                 break;
2760
2761         case ALPS_PROTO_V6:
2762                 priv->hw_init = alps_hw_init_v6;
2763                 priv->process_packet = alps_process_packet_v6;
2764                 priv->set_abs_params = alps_set_abs_params_st;
2765                 priv->nibble_commands = alps_v6_nibble_commands;
2766                 priv->x_max = 2047;
2767                 priv->y_max = 1535;
2768                 break;
2769
2770         case ALPS_PROTO_V7:
2771                 priv->hw_init = alps_hw_init_v7;
2772                 priv->process_packet = alps_process_packet_v7;
2773                 priv->decode_fields = alps_decode_packet_v7;
2774                 priv->set_abs_params = alps_set_abs_params_v7;
2775                 priv->nibble_commands = alps_v3_nibble_commands;
2776                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2777                 priv->x_max = 0xfff;
2778                 priv->y_max = 0x7ff;
2779
2780                 if (priv->fw_ver[1] != 0xba)
2781                         priv->flags |= ALPS_BUTTONPAD;
2782
2783                 if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
2784                         priv->flags &= ~ALPS_DUALPOINT;
2785
2786                 break;
2787
2788         case ALPS_PROTO_V8:
2789                 priv->hw_init = alps_hw_init_ss4_v2;
2790                 priv->process_packet = alps_process_packet_ss4_v2;
2791                 priv->decode_fields = alps_decode_ss4_v2;
2792                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2793                 priv->nibble_commands = alps_v3_nibble_commands;
2794                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2795
2796                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2797                         return -EIO;
2798
2799                 break;
2800         }
2801
2802         return 0;
2803 }
2804
2805 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2806                                                          unsigned char *ec)
2807 {
2808         const struct alps_model_info *model;
2809         int i;
2810
2811         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2812                 model = &alps_model_data[i];
2813
2814                 if (!memcmp(e7, model->signature, sizeof(model->signature)))
2815                         return &model->protocol_info;
2816         }
2817
2818         return NULL;
2819 }
2820
2821 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2822 {
2823         const struct alps_protocol_info *protocol;
2824         unsigned char e6[4], e7[4], ec[4];
2825         int error;
2826
2827         /*
2828          * First try "E6 report".
2829          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2830          * The bits 0-2 of the first byte will be 1s if some buttons are
2831          * pressed.
2832          */
2833         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2834                          PSMOUSE_CMD_SETSCALE11, e6))
2835                 return -EIO;
2836
2837         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2838                 return -EINVAL;
2839
2840         /*
2841          * Now get the "E7" and "EC" reports.  These will uniquely identify
2842          * most ALPS touchpads.
2843          */
2844         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2845                          PSMOUSE_CMD_SETSCALE21, e7) ||
2846             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2847                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2848             alps_exit_command_mode(psmouse))
2849                 return -EIO;
2850
2851         protocol = alps_match_table(e7, ec);
2852         if (!protocol) {
2853                 if (e7[0] == 0x73 && e7[1] == 0x02 && e7[2] == 0x64 &&
2854                            ec[2] == 0x8a) {
2855                         protocol = &alps_v4_protocol_data;
2856                 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2857                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2858                         protocol = &alps_v5_protocol_data;
2859                 } else if (ec[0] == 0x88 &&
2860                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2861                         protocol = &alps_v7_protocol_data;
2862                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2863                         protocol = &alps_v3_rushmore_data;
2864                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2865                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2866                         protocol = &alps_v3_protocol_data;
2867                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2868                            (e7[2] == 0x14 || e7[2] == 0x28)) {
2869                         protocol = &alps_v8_protocol_data;
2870                 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0xc8) {
2871                         protocol = &alps_v9_protocol_data;
2872                         psmouse_warn(psmouse,
2873                                      "Unsupported ALPS V9 touchpad: E7=%3ph, EC=%3ph\n",
2874                                      e7, ec);
2875                         return -EINVAL;
2876                 } else {
2877                         psmouse_dbg(psmouse,
2878                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2879                         return -EINVAL;
2880                 }
2881         }
2882
2883         if (priv) {
2884                 /* Save Device ID and Firmware version */
2885                 memcpy(priv->dev_id, e7, 3);
2886                 memcpy(priv->fw_ver, ec, 3);
2887                 error = alps_set_protocol(psmouse, priv, protocol);
2888                 if (error)
2889                         return error;
2890         }
2891
2892         return 0;
2893 }
2894
2895 static int alps_reconnect(struct psmouse *psmouse)
2896 {
2897         struct alps_data *priv = psmouse->private;
2898
2899         psmouse_reset(psmouse);
2900
2901         if (alps_identify(psmouse, priv) < 0)
2902                 return -1;
2903
2904         return priv->hw_init(psmouse);
2905 }
2906
2907 static void alps_disconnect(struct psmouse *psmouse)
2908 {
2909         struct alps_data *priv = psmouse->private;
2910
2911         psmouse_reset(psmouse);
2912         del_timer_sync(&priv->timer);
2913         if (priv->dev2)
2914                 input_unregister_device(priv->dev2);
2915         if (!IS_ERR_OR_NULL(priv->dev3))
2916                 input_unregister_device(priv->dev3);
2917         kfree(priv);
2918 }
2919
2920 static void alps_set_abs_params_st(struct alps_data *priv,
2921                                    struct input_dev *dev1)
2922 {
2923         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2924         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2925         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2926 }
2927
2928 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2929                                           struct input_dev *dev1)
2930 {
2931         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2932         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2933
2934         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2935         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2936
2937         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2938         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2939 }
2940
2941 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
2942                                         struct input_dev *dev1)
2943 {
2944         alps_set_abs_params_mt_common(priv, dev1);
2945         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2946
2947         input_mt_init_slots(dev1, MAX_TOUCHES,
2948                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2949                                 INPUT_MT_SEMI_MT);
2950 }
2951
2952 static void alps_set_abs_params_v7(struct alps_data *priv,
2953                                    struct input_dev *dev1)
2954 {
2955         alps_set_abs_params_mt_common(priv, dev1);
2956         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2957
2958         input_mt_init_slots(dev1, MAX_TOUCHES,
2959                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2960                                 INPUT_MT_TRACK);
2961
2962         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2963 }
2964
2965 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2966                                        struct input_dev *dev1)
2967 {
2968         alps_set_abs_params_mt_common(priv, dev1);
2969         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2970         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2971
2972         input_mt_init_slots(dev1, MAX_TOUCHES,
2973                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2974                                 INPUT_MT_TRACK);
2975 }
2976
2977 int alps_init(struct psmouse *psmouse)
2978 {
2979         struct alps_data *priv = psmouse->private;
2980         struct input_dev *dev1 = psmouse->dev;
2981         int error;
2982
2983         error = priv->hw_init(psmouse);
2984         if (error)
2985                 goto init_fail;
2986
2987         /*
2988          * Undo part of setup done for us by psmouse core since touchpad
2989          * is not a relative device.
2990          */
2991         __clear_bit(EV_REL, dev1->evbit);
2992         __clear_bit(REL_X, dev1->relbit);
2993         __clear_bit(REL_Y, dev1->relbit);
2994
2995         /*
2996          * Now set up our capabilities.
2997          */
2998         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2999         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
3000         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
3001         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
3002                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
3003
3004         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
3005
3006         priv->set_abs_params(priv, dev1);
3007
3008         if (priv->flags & ALPS_WHEEL) {
3009                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
3010                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
3011         }
3012
3013         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
3014                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
3015                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
3016         }
3017
3018         if (priv->flags & ALPS_FOUR_BUTTONS) {
3019                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
3020                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
3021                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
3022                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
3023         } else if (priv->flags & ALPS_BUTTONPAD) {
3024                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
3025                 clear_bit(BTN_RIGHT, dev1->keybit);
3026         } else {
3027                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
3028         }
3029
3030         if (priv->flags & ALPS_DUALPOINT) {
3031                 struct input_dev *dev2;
3032
3033                 dev2 = input_allocate_device();
3034                 if (!dev2) {
3035                         psmouse_err(psmouse,
3036                                     "failed to allocate trackstick device\n");
3037                         error = -ENOMEM;
3038                         goto init_fail;
3039                 }
3040
3041                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
3042                          psmouse->ps2dev.serio->phys);
3043                 dev2->phys = priv->phys2;
3044
3045                 /*
3046                  * format of input device name is: "protocol vendor name"
3047                  * see function psmouse_switch_protocol() in psmouse-base.c
3048                  */
3049                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
3050
3051                 dev2->id.bustype = BUS_I8042;
3052                 dev2->id.vendor  = 0x0002;
3053                 dev2->id.product = PSMOUSE_ALPS;
3054                 dev2->id.version = priv->proto_version;
3055                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
3056
3057                 input_set_capability(dev2, EV_REL, REL_X);
3058                 input_set_capability(dev2, EV_REL, REL_Y);
3059                 if (priv->flags & ALPS_DUALPOINT_WITH_PRESSURE) {
3060                         input_set_capability(dev2, EV_ABS, ABS_PRESSURE);
3061                         input_set_abs_params(dev2, ABS_PRESSURE, 0, 127, 0, 0);
3062                 }
3063                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
3064                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
3065                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
3066
3067                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
3068                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
3069
3070                 error = input_register_device(dev2);
3071                 if (error) {
3072                         psmouse_err(psmouse,
3073                                     "failed to register trackstick device: %d\n",
3074                                     error);
3075                         input_free_device(dev2);
3076                         goto init_fail;
3077                 }
3078
3079                 priv->dev2 = dev2;
3080         }
3081
3082         priv->psmouse = psmouse;
3083
3084         INIT_DELAYED_WORK(&priv->dev3_register_work,
3085                           alps_register_bare_ps2_mouse);
3086
3087         psmouse->protocol_handler = alps_process_byte;
3088         psmouse->poll = alps_poll;
3089         psmouse->disconnect = alps_disconnect;
3090         psmouse->reconnect = alps_reconnect;
3091         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
3092
3093         /* We are having trouble resyncing ALPS touchpads so disable it for now */
3094         psmouse->resync_time = 0;
3095
3096         /* Allow 2 invalid packets without resetting device */
3097         psmouse->resetafter = psmouse->pktsize * 2;
3098
3099         return 0;
3100
3101 init_fail:
3102         psmouse_reset(psmouse);
3103         /*
3104          * Even though we did not allocate psmouse->private we do free
3105          * it here.
3106          */
3107         kfree(psmouse->private);
3108         psmouse->private = NULL;
3109         return error;
3110 }
3111
3112 int alps_detect(struct psmouse *psmouse, bool set_properties)
3113 {
3114         struct alps_data *priv;
3115         int error;
3116
3117         error = alps_identify(psmouse, NULL);
3118         if (error)
3119                 return error;
3120
3121         /*
3122          * Reset the device to make sure it is fully operational:
3123          * on some laptops, like certain Dell Latitudes, we may
3124          * fail to properly detect presence of trackstick if device
3125          * has not been reset.
3126          */
3127         psmouse_reset(psmouse);
3128
3129         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
3130         if (!priv)
3131                 return -ENOMEM;
3132
3133         error = alps_identify(psmouse, priv);
3134         if (error) {
3135                 kfree(priv);
3136                 return error;
3137         }
3138
3139         if (set_properties) {
3140                 psmouse->vendor = "ALPS";
3141                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
3142                                 "DualPoint TouchPad" : "GlidePoint";
3143                 psmouse->model = priv->proto_version;
3144         } else {
3145                 /*
3146                  * Destroy alps_data structure we allocated earlier since
3147                  * this was just a "trial run". Otherwise we'll keep it
3148                  * to be used by alps_init() which has to be called if
3149                  * we succeed and set_properties is true.
3150                  */
3151                 kfree(priv);
3152                 psmouse->private = NULL;
3153         }
3154
3155         return 0;
3156 }
3157