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                         if (IS_SS4PLUS_DEV(priv->dev_id)) {
1219                                 f->mt[0].x = SS4_PLUS_BTL_MF_X_V2(p, 0);
1220                                 f->mt[1].x = SS4_PLUS_BTL_MF_X_V2(p, 1);
1221                         } else {
1222                                 f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1223                                 f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1224                         }
1225                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1226                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1227                 } else {
1228                         if (IS_SS4PLUS_DEV(priv->dev_id)) {
1229                                 f->mt[0].x = SS4_PLUS_STD_MF_X_V2(p, 0);
1230                                 f->mt[1].x = SS4_PLUS_STD_MF_X_V2(p, 1);
1231                         } else {
1232                                 f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1233                                 f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1234                         }
1235                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1236                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1237                 }
1238                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1239
1240                 if (SS4_IS_MF_CONTINUE(p)) {
1241                         f->first_mp = 1;
1242                 } else {
1243                         f->fingers = 2;
1244                         f->first_mp = 0;
1245                 }
1246                 f->is_mp = 0;
1247
1248                 break;
1249
1250         case SS4_PACKET_ID_MULTI:
1251                 if (priv->flags & ALPS_BUTTONPAD) {
1252                         if (IS_SS4PLUS_DEV(priv->dev_id)) {
1253                                 f->mt[0].x = SS4_PLUS_BTL_MF_X_V2(p, 0);
1254                                 f->mt[1].x = SS4_PLUS_BTL_MF_X_V2(p, 1);
1255                         } else {
1256                                 f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1257                                 f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1258                         }
1259
1260                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1261                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1262                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1263                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1264                 } else {
1265                         if (IS_SS4PLUS_DEV(priv->dev_id)) {
1266                                 f->mt[0].x = SS4_PLUS_STD_MF_X_V2(p, 0);
1267                                 f->mt[1].x = SS4_PLUS_STD_MF_X_V2(p, 1);
1268                         } else {
1269                                 f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1270                                 f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1271                         }
1272                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1273                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1274                         no_data_x = SS4_MFPACKET_NO_AX;
1275                         no_data_y = SS4_MFPACKET_NO_AY;
1276                 }
1277
1278                 f->first_mp = 0;
1279                 f->is_mp = 1;
1280
1281                 if (SS4_IS_5F_DETECTED(p)) {
1282                         f->fingers = 5;
1283                 } else if (f->mt[3].x == no_data_x &&
1284                              f->mt[3].y == no_data_y) {
1285                         f->mt[3].x = 0;
1286                         f->mt[3].y = 0;
1287                         f->fingers = 3;
1288                 } else {
1289                         f->fingers = 4;
1290                 }
1291                 break;
1292
1293         case SS4_PACKET_ID_STICK:
1294                 /*
1295                  * x, y, and pressure are decoded in
1296                  * alps_process_packet_ss4_v2()
1297                  */
1298                 f->first_mp = 0;
1299                 f->is_mp = 0;
1300                 break;
1301
1302         case SS4_PACKET_ID_IDLE:
1303         default:
1304                 memset(f, 0, sizeof(struct alps_fields));
1305                 break;
1306         }
1307
1308         /* handle buttons */
1309         if (pkt_id == SS4_PACKET_ID_STICK) {
1310                 f->ts_left = !!(SS4_BTN_V2(p) & 0x01);
1311                 f->ts_right = !!(SS4_BTN_V2(p) & 0x02);
1312                 f->ts_middle = !!(SS4_BTN_V2(p) & 0x04);
1313         } else {
1314                 f->left = !!(SS4_BTN_V2(p) & 0x01);
1315                 if (!(priv->flags & ALPS_BUTTONPAD)) {
1316                         f->right = !!(SS4_BTN_V2(p) & 0x02);
1317                         f->middle = !!(SS4_BTN_V2(p) & 0x04);
1318                 }
1319         }
1320
1321         return 0;
1322 }
1323
1324 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1325 {
1326         struct alps_data *priv = psmouse->private;
1327         unsigned char *packet = psmouse->packet;
1328         struct input_dev *dev = psmouse->dev;
1329         struct input_dev *dev2 = priv->dev2;
1330         struct alps_fields *f = &priv->f;
1331
1332         memset(f, 0, sizeof(struct alps_fields));
1333         priv->decode_fields(f, packet, psmouse);
1334         if (priv->multi_packet) {
1335                 /*
1336                  * Sometimes the first packet will indicate a multi-packet
1337                  * sequence, but sometimes the next multi-packet would not
1338                  * come. Check for this, and when it happens process the
1339                  * position packet as usual.
1340                  */
1341                 if (f->is_mp) {
1342                         /* Now process the 1st packet */
1343                         priv->decode_fields(f, priv->multi_data, psmouse);
1344                 } else {
1345                         priv->multi_packet = 0;
1346                 }
1347         }
1348
1349         /*
1350          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1351          * When it is set, it means 2nd packet comes without 1st packet come.
1352          */
1353         if (f->is_mp)
1354                 return;
1355
1356         /* Save the first packet */
1357         if (!priv->multi_packet && f->first_mp) {
1358                 priv->multi_packet = 1;
1359                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1360                 return;
1361         }
1362
1363         priv->multi_packet = 0;
1364
1365         /* Report trackstick */
1366         if (alps_get_pkt_id_ss4_v2(packet) == SS4_PACKET_ID_STICK) {
1367                 if (!(priv->flags & ALPS_DUALPOINT)) {
1368                         psmouse_warn(psmouse,
1369                                      "Rejected trackstick packet from non DualPoint device");
1370                         return;
1371                 }
1372
1373                 input_report_rel(dev2, REL_X, SS4_TS_X_V2(packet));
1374                 input_report_rel(dev2, REL_Y, SS4_TS_Y_V2(packet));
1375                 input_report_abs(dev2, ABS_PRESSURE, SS4_TS_Z_V2(packet));
1376
1377                 input_report_key(dev2, BTN_LEFT, f->ts_left);
1378                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
1379                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
1380
1381                 input_sync(dev2);
1382                 return;
1383         }
1384
1385         /* Report touchpad */
1386         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1387
1388         input_mt_report_finger_count(dev, f->fingers);
1389
1390         input_report_key(dev, BTN_LEFT, f->left);
1391         input_report_key(dev, BTN_RIGHT, f->right);
1392         input_report_key(dev, BTN_MIDDLE, f->middle);
1393
1394         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1395         input_sync(dev);
1396 }
1397
1398 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1399 {
1400         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1401                 return false;
1402         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1403                 return false;
1404         return true;
1405 }
1406
1407 static DEFINE_MUTEX(alps_mutex);
1408
1409 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1410 {
1411         struct alps_data *priv =
1412                 container_of(work, struct alps_data, dev3_register_work.work);
1413         struct psmouse *psmouse = priv->psmouse;
1414         struct input_dev *dev3;
1415         int error = 0;
1416
1417         mutex_lock(&alps_mutex);
1418
1419         if (priv->dev3)
1420                 goto out;
1421
1422         dev3 = input_allocate_device();
1423         if (!dev3) {
1424                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1425                 error = -ENOMEM;
1426                 goto out;
1427         }
1428
1429         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1430                  psmouse->ps2dev.serio->phys,
1431                  (priv->dev2 ? "input2" : "input1"));
1432         dev3->phys = priv->phys3;
1433
1434         /*
1435          * format of input device name is: "protocol vendor name"
1436          * see function psmouse_switch_protocol() in psmouse-base.c
1437          */
1438         dev3->name = "PS/2 ALPS Mouse";
1439
1440         dev3->id.bustype = BUS_I8042;
1441         dev3->id.vendor  = 0x0002;
1442         dev3->id.product = PSMOUSE_PS2;
1443         dev3->id.version = 0x0000;
1444         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1445
1446         input_set_capability(dev3, EV_REL, REL_X);
1447         input_set_capability(dev3, EV_REL, REL_Y);
1448         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1449         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1450         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1451
1452         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1453
1454         error = input_register_device(dev3);
1455         if (error) {
1456                 psmouse_err(psmouse,
1457                             "failed to register secondary device: %d\n",
1458                             error);
1459                 input_free_device(dev3);
1460                 goto out;
1461         }
1462
1463         priv->dev3 = dev3;
1464
1465 out:
1466         /*
1467          * Save the error code so that we can detect that we
1468          * already tried to create the device.
1469          */
1470         if (error)
1471                 priv->dev3 = ERR_PTR(error);
1472
1473         mutex_unlock(&alps_mutex);
1474 }
1475
1476 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1477                                         unsigned char packet[],
1478                                         bool report_buttons)
1479 {
1480         struct alps_data *priv = psmouse->private;
1481         struct input_dev *dev, *dev2 = NULL;
1482
1483         /* Figure out which device to use to report the bare packet */
1484         if (priv->proto_version == ALPS_PROTO_V2 &&
1485             (priv->flags & ALPS_DUALPOINT)) {
1486                 /* On V2 devices the DualPoint Stick reports bare packets */
1487                 dev = priv->dev2;
1488                 dev2 = psmouse->dev;
1489         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1490                 /* Register dev3 mouse if we received PS/2 packet first time */
1491                 if (!IS_ERR(priv->dev3))
1492                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1493                                            0);
1494                 return;
1495         } else {
1496                 dev = priv->dev3;
1497         }
1498
1499         if (report_buttons)
1500                 alps_report_buttons(dev, dev2,
1501                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1502
1503         input_report_rel(dev, REL_X,
1504                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1505         input_report_rel(dev, REL_Y,
1506                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1507
1508         input_sync(dev);
1509 }
1510
1511 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1512 {
1513         struct alps_data *priv = psmouse->private;
1514
1515         if (psmouse->pktcnt < 6)
1516                 return PSMOUSE_GOOD_DATA;
1517
1518         if (psmouse->pktcnt == 6) {
1519                 /*
1520                  * Start a timer to flush the packet if it ends up last
1521                  * 6-byte packet in the stream. Timer needs to fire
1522                  * psmouse core times out itself. 20 ms should be enough
1523                  * to decide if we are getting more data or not.
1524                  */
1525                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1526                 return PSMOUSE_GOOD_DATA;
1527         }
1528
1529         del_timer(&priv->timer);
1530
1531         if (psmouse->packet[6] & 0x80) {
1532
1533                 /*
1534                  * Highest bit is set - that means we either had
1535                  * complete ALPS packet and this is start of the
1536                  * next packet or we got garbage.
1537                  */
1538
1539                 if (((psmouse->packet[3] |
1540                       psmouse->packet[4] |
1541                       psmouse->packet[5]) & 0x80) ||
1542                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1543                         psmouse_dbg(psmouse,
1544                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1545                                     psmouse->packet + 3);
1546                         return PSMOUSE_BAD_DATA;
1547                 }
1548
1549                 priv->process_packet(psmouse);
1550
1551                 /* Continue with the next packet */
1552                 psmouse->packet[0] = psmouse->packet[6];
1553                 psmouse->pktcnt = 1;
1554
1555         } else {
1556
1557                 /*
1558                  * High bit is 0 - that means that we indeed got a PS/2
1559                  * packet in the middle of ALPS packet.
1560                  *
1561                  * There is also possibility that we got 6-byte ALPS
1562                  * packet followed  by 3-byte packet from trackpoint. We
1563                  * can not distinguish between these 2 scenarios but
1564                  * because the latter is unlikely to happen in course of
1565                  * normal operation (user would need to press all
1566                  * buttons on the pad and start moving trackpoint
1567                  * without touching the pad surface) we assume former.
1568                  * Even if we are wrong the wost thing that would happen
1569                  * the cursor would jump but we should not get protocol
1570                  * de-synchronization.
1571                  */
1572
1573                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1574                                             false);
1575
1576                 /*
1577                  * Continue with the standard ALPS protocol handling,
1578                  * but make sure we won't process it as an interleaved
1579                  * packet again, which may happen if all buttons are
1580                  * pressed. To avoid this let's reset the 4th bit which
1581                  * is normally 1.
1582                  */
1583                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1584                 psmouse->pktcnt = 4;
1585         }
1586
1587         return PSMOUSE_GOOD_DATA;
1588 }
1589
1590 static void alps_flush_packet(struct timer_list *t)
1591 {
1592         struct alps_data *priv = from_timer(priv, t, timer);
1593         struct psmouse *psmouse = priv->psmouse;
1594
1595         serio_pause_rx(psmouse->ps2dev.serio);
1596
1597         if (psmouse->pktcnt == psmouse->pktsize) {
1598
1599                 /*
1600                  * We did not any more data in reasonable amount of time.
1601                  * Validate the last 3 bytes and process as a standard
1602                  * ALPS packet.
1603                  */
1604                 if ((psmouse->packet[3] |
1605                      psmouse->packet[4] |
1606                      psmouse->packet[5]) & 0x80) {
1607                         psmouse_dbg(psmouse,
1608                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1609                                     psmouse->packet + 3);
1610                 } else {
1611                         priv->process_packet(psmouse);
1612                 }
1613                 psmouse->pktcnt = 0;
1614         }
1615
1616         serio_continue_rx(psmouse->ps2dev.serio);
1617 }
1618
1619 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1620 {
1621         struct alps_data *priv = psmouse->private;
1622
1623         /*
1624          * Check if we are dealing with a bare PS/2 packet, presumably from
1625          * a device connected to the external PS/2 port. Because bare PS/2
1626          * protocol does not have enough constant bits to self-synchronize
1627          * properly we only do this if the device is fully synchronized.
1628          * Can not distinguish V8's first byte from PS/2 packet's
1629          */
1630         if (priv->proto_version != ALPS_PROTO_V8 &&
1631             !psmouse->out_of_sync_cnt &&
1632             (psmouse->packet[0] & 0xc8) == 0x08) {
1633
1634                 if (psmouse->pktcnt == 3) {
1635                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1636                                                     true);
1637                         return PSMOUSE_FULL_PACKET;
1638                 }
1639                 return PSMOUSE_GOOD_DATA;
1640         }
1641
1642         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1643
1644         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1645             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1646                 return alps_handle_interleaved_ps2(psmouse);
1647         }
1648
1649         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1650                 psmouse_dbg(psmouse,
1651                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1652                             psmouse->packet[0], priv->mask0, priv->byte0);
1653                 return PSMOUSE_BAD_DATA;
1654         }
1655
1656         /* Bytes 2 - pktsize should have 0 in the highest bit */
1657         if (priv->proto_version < ALPS_PROTO_V5 &&
1658             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1659             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1660                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1661                             psmouse->pktcnt - 1,
1662                             psmouse->packet[psmouse->pktcnt - 1]);
1663
1664                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1665                     psmouse->pktcnt == psmouse->pktsize) {
1666                         /*
1667                          * Some Dell boxes, such as Latitude E6440 or E7440
1668                          * with closed lid, quite often smash last byte of
1669                          * otherwise valid packet with 0xff. Given that the
1670                          * next packet is very likely to be valid let's
1671                          * report PSMOUSE_FULL_PACKET but not process data,
1672                          * rather than reporting PSMOUSE_BAD_DATA and
1673                          * filling the logs.
1674                          */
1675                         return PSMOUSE_FULL_PACKET;
1676                 }
1677
1678                 return PSMOUSE_BAD_DATA;
1679         }
1680
1681         if ((priv->proto_version == ALPS_PROTO_V7 &&
1682                         !alps_is_valid_package_v7(psmouse)) ||
1683             (priv->proto_version == ALPS_PROTO_V8 &&
1684                         !alps_is_valid_package_ss4_v2(psmouse))) {
1685                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1686                             psmouse->pktcnt - 1,
1687                             psmouse->packet[psmouse->pktcnt - 1]);
1688                 return PSMOUSE_BAD_DATA;
1689         }
1690
1691         if (psmouse->pktcnt == psmouse->pktsize) {
1692                 priv->process_packet(psmouse);
1693                 return PSMOUSE_FULL_PACKET;
1694         }
1695
1696         return PSMOUSE_GOOD_DATA;
1697 }
1698
1699 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1700 {
1701         struct ps2dev *ps2dev = &psmouse->ps2dev;
1702         struct alps_data *priv = psmouse->private;
1703         int command;
1704         unsigned char *param;
1705         unsigned char dummy[4];
1706
1707         BUG_ON(nibble > 0xf);
1708
1709         command = priv->nibble_commands[nibble].command;
1710         param = (command & 0x0f00) ?
1711                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1712
1713         if (ps2_command(ps2dev, param, command))
1714                 return -1;
1715
1716         return 0;
1717 }
1718
1719 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1720 {
1721         struct ps2dev *ps2dev = &psmouse->ps2dev;
1722         struct alps_data *priv = psmouse->private;
1723         int i, nibble;
1724
1725         if (ps2_command(ps2dev, NULL, priv->addr_command))
1726                 return -1;
1727
1728         for (i = 12; i >= 0; i -= 4) {
1729                 nibble = (addr >> i) & 0xf;
1730                 if (alps_command_mode_send_nibble(psmouse, nibble))
1731                         return -1;
1732         }
1733
1734         return 0;
1735 }
1736
1737 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1738 {
1739         struct ps2dev *ps2dev = &psmouse->ps2dev;
1740         unsigned char param[4];
1741
1742         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1743                 return -1;
1744
1745         /*
1746          * The address being read is returned in the first two bytes
1747          * of the result. Check that this address matches the expected
1748          * address.
1749          */
1750         if (addr != ((param[0] << 8) | param[1]))
1751                 return -1;
1752
1753         return param[2];
1754 }
1755
1756 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1757 {
1758         if (alps_command_mode_set_addr(psmouse, addr))
1759                 return -1;
1760         return __alps_command_mode_read_reg(psmouse, addr);
1761 }
1762
1763 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1764 {
1765         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1766                 return -1;
1767         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1768                 return -1;
1769         return 0;
1770 }
1771
1772 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1773                                        u8 value)
1774 {
1775         if (alps_command_mode_set_addr(psmouse, addr))
1776                 return -1;
1777         return __alps_command_mode_write_reg(psmouse, value);
1778 }
1779
1780 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1781                         int repeated_command, unsigned char *param)
1782 {
1783         struct ps2dev *ps2dev = &psmouse->ps2dev;
1784
1785         param[0] = 0;
1786         if (init_command && ps2_command(ps2dev, param, init_command))
1787                 return -EIO;
1788
1789         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1790             ps2_command(ps2dev,  NULL, repeated_command) ||
1791             ps2_command(ps2dev,  NULL, repeated_command))
1792                 return -EIO;
1793
1794         param[0] = param[1] = param[2] = 0xff;
1795         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1796                 return -EIO;
1797
1798         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1799                     repeated_command, param);
1800         return 0;
1801 }
1802
1803 static bool alps_check_valid_firmware_id(unsigned char id[])
1804 {
1805         if (id[0] == 0x73)
1806                 return true;
1807
1808         if (id[0] == 0x88 &&
1809             (id[1] == 0x07 ||
1810              id[1] == 0x08 ||
1811              (id[1] & 0xf0) == 0xb0 ||
1812              (id[1] & 0xf0) == 0xc0)) {
1813                 return true;
1814         }
1815
1816         return false;
1817 }
1818
1819 static int alps_enter_command_mode(struct psmouse *psmouse)
1820 {
1821         unsigned char param[4];
1822
1823         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1824                 psmouse_err(psmouse, "failed to enter command mode\n");
1825                 return -1;
1826         }
1827
1828         if (!alps_check_valid_firmware_id(param)) {
1829                 psmouse_dbg(psmouse,
1830                             "unknown response while entering command mode\n");
1831                 return -1;
1832         }
1833         return 0;
1834 }
1835
1836 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1837 {
1838         struct ps2dev *ps2dev = &psmouse->ps2dev;
1839         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1840                 return -1;
1841         return 0;
1842 }
1843
1844 /*
1845  * For DualPoint devices select the device that should respond to
1846  * subsequent commands. It looks like glidepad is behind stickpointer,
1847  * I'd thought it would be other way around...
1848  */
1849 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1850 {
1851         struct ps2dev *ps2dev = &psmouse->ps2dev;
1852         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1853
1854         if (ps2_command(ps2dev, NULL, cmd) ||
1855             ps2_command(ps2dev, NULL, cmd) ||
1856             ps2_command(ps2dev, NULL, cmd) ||
1857             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1858                 return -1;
1859
1860         /* we may get 3 more bytes, just ignore them */
1861         ps2_drain(ps2dev, 3, 100);
1862
1863         return 0;
1864 }
1865
1866 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1867 {
1868         struct ps2dev *ps2dev = &psmouse->ps2dev;
1869
1870         /* Try ALPS magic knock - 4 disable before enable */
1871         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1872             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1873             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1874             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1875             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1876                 return -1;
1877
1878         /*
1879          * Switch mouse to poll (remote) mode so motion data will not
1880          * get in our way
1881          */
1882         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1883 }
1884
1885 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1886 {
1887         int i, nibble;
1888
1889         /*
1890          * b0-b11 are valid bits, send sequence is inverse.
1891          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1892          */
1893         for (i = 0; i <= 8; i += 4) {
1894                 nibble = (word >> i) & 0xf;
1895                 if (alps_command_mode_send_nibble(psmouse, nibble))
1896                         return -1;
1897         }
1898
1899         return 0;
1900 }
1901
1902 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1903                                        u16 addr, u16 value)
1904 {
1905         struct ps2dev *ps2dev = &psmouse->ps2dev;
1906
1907         /* 0x0A0 is the command to write the word */
1908         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1909             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1910             alps_monitor_mode_send_word(psmouse, addr) ||
1911             alps_monitor_mode_send_word(psmouse, value) ||
1912             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1913                 return -1;
1914
1915         return 0;
1916 }
1917
1918 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1919 {
1920         struct ps2dev *ps2dev = &psmouse->ps2dev;
1921
1922         if (enable) {
1923                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1924                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1925                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1926                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1927                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1928                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1929                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1930                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1931                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1932                         return -1;
1933         } else {
1934                 /* EC to exit monitor mode */
1935                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1936                         return -1;
1937         }
1938
1939         return 0;
1940 }
1941
1942 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1943 {
1944         u16 reg_val = 0x181;
1945         int ret = -1;
1946
1947         /* enter monitor mode, to write the register */
1948         if (alps_monitor_mode(psmouse, true))
1949                 return -1;
1950
1951         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1952
1953         if (alps_monitor_mode(psmouse, false))
1954                 ret = -1;
1955
1956         return ret;
1957 }
1958
1959 static int alps_get_status(struct psmouse *psmouse, char *param)
1960 {
1961         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1962         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1963                 return -1;
1964
1965         return 0;
1966 }
1967
1968 /*
1969  * Turn touchpad tapping on or off. The sequences are:
1970  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1971  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1972  * My guess that 0xE9 (GetInfo) is here as a sync point.
1973  * For models that also have stickpointer (DualPoints) its tapping
1974  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1975  * we don't fiddle with it.
1976  */
1977 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1978 {
1979         struct ps2dev *ps2dev = &psmouse->ps2dev;
1980         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1981         unsigned char tap_arg = enable ? 0x0A : 0x00;
1982         unsigned char param[4];
1983
1984         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1985             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1986             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1987             ps2_command(ps2dev, &tap_arg, cmd))
1988                 return -1;
1989
1990         if (alps_get_status(psmouse, param))
1991                 return -1;
1992
1993         return 0;
1994 }
1995
1996 /*
1997  * alps_poll() - poll the touchpad for current motion packet.
1998  * Used in resync.
1999  */
2000 static int alps_poll(struct psmouse *psmouse)
2001 {
2002         struct alps_data *priv = psmouse->private;
2003         unsigned char buf[sizeof(psmouse->packet)];
2004         bool poll_failed;
2005
2006         if (priv->flags & ALPS_PASS)
2007                 alps_passthrough_mode_v2(psmouse, true);
2008
2009         poll_failed = ps2_command(&psmouse->ps2dev, buf,
2010                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
2011
2012         if (priv->flags & ALPS_PASS)
2013                 alps_passthrough_mode_v2(psmouse, false);
2014
2015         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
2016                 return -1;
2017
2018         if ((psmouse->badbyte & 0xc8) == 0x08) {
2019 /*
2020  * Poll the track stick ...
2021  */
2022                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
2023                         return -1;
2024         }
2025
2026         memcpy(psmouse->packet, buf, sizeof(buf));
2027         return 0;
2028 }
2029
2030 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
2031 {
2032         struct alps_data *priv = psmouse->private;
2033
2034         if ((priv->flags & ALPS_PASS) &&
2035             alps_passthrough_mode_v2(psmouse, true)) {
2036                 return -1;
2037         }
2038
2039         if (alps_tap_mode(psmouse, true)) {
2040                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
2041                 return -1;
2042         }
2043
2044         if (alps_absolute_mode_v1_v2(psmouse)) {
2045                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2046                 return -1;
2047         }
2048
2049         if ((priv->flags & ALPS_PASS) &&
2050             alps_passthrough_mode_v2(psmouse, false)) {
2051                 return -1;
2052         }
2053
2054         /* ALPS needs stream mode, otherwise it won't report any data */
2055         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
2056                 psmouse_err(psmouse, "Failed to enable stream mode\n");
2057                 return -1;
2058         }
2059
2060         return 0;
2061 }
2062
2063 static int alps_hw_init_v6(struct psmouse *psmouse)
2064 {
2065         unsigned char param[2] = {0xC8, 0x14};
2066
2067         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
2068         if (alps_passthrough_mode_v2(psmouse, true))
2069                 return -1;
2070
2071         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2072             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2073             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2074             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2075             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2076                 return -1;
2077
2078         if (alps_passthrough_mode_v2(psmouse, false))
2079                 return -1;
2080
2081         if (alps_absolute_mode_v6(psmouse)) {
2082                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2083                 return -1;
2084         }
2085
2086         return 0;
2087 }
2088
2089 /*
2090  * Enable or disable passthrough mode to the trackstick.
2091  */
2092 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
2093                                     int reg_base, bool enable)
2094 {
2095         int reg_val, ret = -1;
2096
2097         if (alps_enter_command_mode(psmouse))
2098                 return -1;
2099
2100         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
2101         if (reg_val == -1)
2102                 goto error;
2103
2104         if (enable)
2105                 reg_val |= 0x01;
2106         else
2107                 reg_val &= ~0x01;
2108
2109         ret = __alps_command_mode_write_reg(psmouse, reg_val);
2110
2111 error:
2112         if (alps_exit_command_mode(psmouse))
2113                 ret = -1;
2114         return ret;
2115 }
2116
2117 /* Must be in command mode when calling this function */
2118 static int alps_absolute_mode_v3(struct psmouse *psmouse)
2119 {
2120         int reg_val;
2121
2122         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2123         if (reg_val == -1)
2124                 return -1;
2125
2126         reg_val |= 0x06;
2127         if (__alps_command_mode_write_reg(psmouse, reg_val))
2128                 return -1;
2129
2130         return 0;
2131 }
2132
2133 static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base)
2134 {
2135         int ret = -EIO, reg_val;
2136
2137         if (alps_enter_command_mode(psmouse))
2138                 goto error;
2139
2140         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2141         if (reg_val == -1)
2142                 goto error;
2143
2144         /* bit 7: trackstick is present */
2145         ret = reg_val & 0x80 ? 0 : -ENODEV;
2146
2147 error:
2148         alps_exit_command_mode(psmouse);
2149         return ret;
2150 }
2151
2152 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2153 {
2154         struct ps2dev *ps2dev = &psmouse->ps2dev;
2155         int ret = 0;
2156         unsigned char param[4];
2157
2158         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2159                 return -EIO;
2160
2161         /*
2162          * E7 report for the trackstick
2163          *
2164          * There have been reports of failures to seem to trace back
2165          * to the above trackstick check failing. When these occur
2166          * this E7 report fails, so when that happens we continue
2167          * with the assumption that there isn't a trackstick after
2168          * all.
2169          */
2170         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2171                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2172                 ret = -ENODEV;
2173         } else {
2174                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2175
2176                 /*
2177                  * Not sure what this does, but it is absolutely
2178                  * essential. Without it, the touchpad does not
2179                  * work at all and the trackstick just emits normal
2180                  * PS/2 packets.
2181                  */
2182                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2183                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2184                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2185                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2186                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2187                         psmouse_err(psmouse,
2188                                     "Error sending magic E6 sequence\n");
2189                         ret = -EIO;
2190                         goto error;
2191                 }
2192
2193                 /*
2194                  * This ensures the trackstick packets are in the format
2195                  * supported by this driver. If bit 1 isn't set the packet
2196                  * format is different.
2197                  */
2198                 if (alps_enter_command_mode(psmouse) ||
2199                     alps_command_mode_write_reg(psmouse,
2200                                                 reg_base + 0x08, 0x82) ||
2201                     alps_exit_command_mode(psmouse))
2202                         ret = -EIO;
2203         }
2204
2205 error:
2206         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2207                 ret = -EIO;
2208
2209         return ret;
2210 }
2211
2212 static int alps_hw_init_v3(struct psmouse *psmouse)
2213 {
2214         struct alps_data *priv = psmouse->private;
2215         struct ps2dev *ps2dev = &psmouse->ps2dev;
2216         int reg_val;
2217         unsigned char param[4];
2218
2219         if ((priv->flags & ALPS_DUALPOINT) &&
2220             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2221                 goto error;
2222
2223         if (alps_enter_command_mode(psmouse) ||
2224             alps_absolute_mode_v3(psmouse)) {
2225                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2226                 goto error;
2227         }
2228
2229         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2230         if (reg_val == -1)
2231                 goto error;
2232         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2233                 goto error;
2234
2235         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2236         if (reg_val == -1)
2237                 goto error;
2238         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2239                 goto error;
2240
2241         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2242                 goto error;
2243         if (__alps_command_mode_write_reg(psmouse, 0x04))
2244                 goto error;
2245
2246         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2247                 goto error;
2248         if (__alps_command_mode_write_reg(psmouse, 0x03))
2249                 goto error;
2250
2251         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2252                 goto error;
2253         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2254                 goto error;
2255
2256         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2257                 goto error;
2258         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2259                 goto error;
2260
2261         alps_exit_command_mode(psmouse);
2262
2263         /* Set rate and enable data reporting */
2264         param[0] = 0x64;
2265         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2266             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2267                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2268                 return -1;
2269         }
2270
2271         return 0;
2272
2273 error:
2274         /*
2275          * Leaving the touchpad in command mode will essentially render
2276          * it unusable until the machine reboots, so exit it here just
2277          * to be safe
2278          */
2279         alps_exit_command_mode(psmouse);
2280         return -1;
2281 }
2282
2283 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2284 {
2285         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2286         struct alps_data *priv = psmouse->private;
2287
2288         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2289         if (reg < 0)
2290                 return reg;
2291
2292         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2293         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2294
2295         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2296         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2297
2298         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2299         if (reg < 0)
2300                 return reg;
2301
2302         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2303         x_electrode = 17 + x_electrode;
2304
2305         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2306         y_electrode = 13 + y_electrode;
2307
2308         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2309         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2310
2311         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2312         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2313
2314         psmouse_dbg(psmouse,
2315                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2316                     x_pitch, y_pitch, x_electrode, y_electrode,
2317                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2318
2319         return 0;
2320 }
2321
2322 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2323 {
2324         struct alps_data *priv = psmouse->private;
2325         struct ps2dev *ps2dev = &psmouse->ps2dev;
2326         int reg_val, ret = -1;
2327
2328         if (priv->flags & ALPS_DUALPOINT) {
2329                 reg_val = alps_setup_trackstick_v3(psmouse,
2330                                                    ALPS_REG_BASE_RUSHMORE);
2331                 if (reg_val == -EIO)
2332                         goto error;
2333         }
2334
2335         if (alps_enter_command_mode(psmouse) ||
2336             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2337             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2338                 goto error;
2339
2340         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2341                 goto error;
2342
2343         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2344         if (reg_val == -1)
2345                 goto error;
2346         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2347                 goto error;
2348
2349         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2350                 goto error;
2351
2352         /* enter absolute mode */
2353         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2354         if (reg_val == -1)
2355                 goto error;
2356         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2357                 goto error;
2358
2359         alps_exit_command_mode(psmouse);
2360         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2361
2362 error:
2363         alps_exit_command_mode(psmouse);
2364         return ret;
2365 }
2366
2367 /* Must be in command mode when calling this function */
2368 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2369 {
2370         int reg_val;
2371
2372         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2373         if (reg_val == -1)
2374                 return -1;
2375
2376         reg_val |= 0x02;
2377         if (__alps_command_mode_write_reg(psmouse, reg_val))
2378                 return -1;
2379
2380         return 0;
2381 }
2382
2383 static int alps_hw_init_v4(struct psmouse *psmouse)
2384 {
2385         struct ps2dev *ps2dev = &psmouse->ps2dev;
2386         unsigned char param[4];
2387
2388         if (alps_enter_command_mode(psmouse))
2389                 goto error;
2390
2391         if (alps_absolute_mode_v4(psmouse)) {
2392                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2393                 goto error;
2394         }
2395
2396         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2397                 goto error;
2398
2399         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2400                 goto error;
2401
2402         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2403                 goto error;
2404
2405         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2406                 goto error;
2407
2408         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2409                 goto error;
2410
2411         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2412                 goto error;
2413
2414         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2415                 goto error;
2416
2417         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2418                 goto error;
2419
2420         alps_exit_command_mode(psmouse);
2421
2422         /*
2423          * This sequence changes the output from a 9-byte to an
2424          * 8-byte format. All the same data seems to be present,
2425          * just in a more compact format.
2426          */
2427         param[0] = 0xc8;
2428         param[1] = 0x64;
2429         param[2] = 0x50;
2430         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2431             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2432             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2433             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2434                 return -1;
2435
2436         /* Set rate and enable data reporting */
2437         param[0] = 0x64;
2438         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2439             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2440                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2441                 return -1;
2442         }
2443
2444         return 0;
2445
2446 error:
2447         /*
2448          * Leaving the touchpad in command mode will essentially render
2449          * it unusable until the machine reboots, so exit it here just
2450          * to be safe
2451          */
2452         alps_exit_command_mode(psmouse);
2453         return -1;
2454 }
2455
2456 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2457                                       unsigned char index, unsigned char otp[])
2458 {
2459         struct ps2dev *ps2dev = &psmouse->ps2dev;
2460
2461         switch (index) {
2462         case 0:
2463                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2464                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2465                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2466                         return -1;
2467
2468                 break;
2469
2470         case 1:
2471                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2472                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2473                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2474                         return -1;
2475
2476                 break;
2477         }
2478
2479         return 0;
2480 }
2481
2482 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2483                                           struct alps_data *priv)
2484 {
2485         int num_x_electrode;
2486         int num_y_electrode;
2487         int x_pitch, y_pitch, x_phys, y_phys;
2488
2489         if (IS_SS4PLUS_DEV(priv->dev_id)) {
2490                 num_x_electrode =
2491                         SS4PLUS_NUMSENSOR_XOFFSET + (otp[0][2] & 0x0F);
2492                 num_y_electrode =
2493                         SS4PLUS_NUMSENSOR_YOFFSET + ((otp[0][2] >> 4) & 0x0F);
2494
2495                 priv->x_max =
2496                         (num_x_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2497                 priv->y_max =
2498                         (num_y_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2499
2500                 x_pitch = (otp[0][1] & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2501                 y_pitch = ((otp[0][1] >> 4) & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2502
2503         } else {
2504                 num_x_electrode =
2505                         SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2506                 num_y_electrode =
2507                         SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2508
2509                 priv->x_max =
2510                         (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2511                 priv->y_max =
2512                         (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2513
2514                 x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2515                 y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2516         }
2517
2518         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2519         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2520
2521         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2522         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2523
2524         return 0;
2525 }
2526
2527 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2528                                        struct alps_data *priv)
2529 {
2530         unsigned char is_btnless;
2531
2532         if (IS_SS4PLUS_DEV(priv->dev_id))
2533                 is_btnless = (otp[1][0] >> 1) & 0x01;
2534         else
2535                 is_btnless = (otp[1][1] >> 3) & 0x01;
2536
2537         if (is_btnless)
2538                 priv->flags |= ALPS_BUTTONPAD;
2539
2540         return 0;
2541 }
2542
2543 static int alps_update_dual_info_ss4_v2(unsigned char otp[][4],
2544                                        struct alps_data *priv)
2545 {
2546         bool is_dual = false;
2547
2548         if (IS_SS4PLUS_DEV(priv->dev_id))
2549                 is_dual = (otp[0][0] >> 4) & 0x01;
2550
2551         if (is_dual)
2552                 priv->flags |= ALPS_DUALPOINT |
2553                                         ALPS_DUALPOINT_WITH_PRESSURE;
2554
2555         return 0;
2556 }
2557
2558 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2559                                     struct alps_data *priv)
2560 {
2561         unsigned char otp[2][4];
2562
2563         memset(otp, 0, sizeof(otp));
2564
2565         if (alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]) ||
2566             alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]))
2567                 return -1;
2568
2569         alps_update_device_area_ss4_v2(otp, priv);
2570
2571         alps_update_btn_info_ss4_v2(otp, priv);
2572
2573         alps_update_dual_info_ss4_v2(otp, priv);
2574
2575         return 0;
2576 }
2577
2578 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2579                                         struct alps_data *priv)
2580 {
2581         struct ps2dev *ps2dev = &psmouse->ps2dev;
2582         unsigned char param[4] = {0};
2583         int num_x_electrode, num_y_electrode;
2584
2585         if (alps_enter_command_mode(psmouse))
2586                 return -1;
2587
2588         param[0] = 0x0a;
2589         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2590             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2591             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2592             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2593             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2594                 return -1;
2595
2596         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2597                 return -1;
2598
2599         /*
2600          * Dolphin's sensor line number is not fixed. It can be calculated
2601          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2602          * Further more, we can get device's x_max and y_max by multiplying
2603          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2604          *
2605          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2606          *      real sensor line number X = 11 + 8 = 19, and
2607          *      real sensor line number Y = 8 + 1 = 9.
2608          *      So, x_max = (19 - 1) * 64 = 1152, and
2609          *          y_max = (9 - 1) * 64 = 512.
2610          */
2611         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2612         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2613         priv->x_bits = num_x_electrode;
2614         priv->y_bits = num_y_electrode;
2615         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2616         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2617
2618         if (alps_exit_command_mode(psmouse))
2619                 return -1;
2620
2621         return 0;
2622 }
2623
2624 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2625 {
2626         struct ps2dev *ps2dev = &psmouse->ps2dev;
2627         unsigned char param[2];
2628
2629         /* This is dolphin "v1" as empirically defined by florin9doi */
2630         param[0] = 0x64;
2631         param[1] = 0x28;
2632
2633         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2634             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2635             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2636                 return -1;
2637
2638         return 0;
2639 }
2640
2641 static int alps_hw_init_v7(struct psmouse *psmouse)
2642 {
2643         struct ps2dev *ps2dev = &psmouse->ps2dev;
2644         int reg_val, ret = -1;
2645
2646         if (alps_enter_command_mode(psmouse) ||
2647             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2648                 goto error;
2649
2650         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2651                 goto error;
2652
2653         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2654                 goto error;
2655
2656         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2657         if (reg_val == -1)
2658                 goto error;
2659         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2660                 goto error;
2661
2662         alps_exit_command_mode(psmouse);
2663         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2664
2665 error:
2666         alps_exit_command_mode(psmouse);
2667         return ret;
2668 }
2669
2670 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2671 {
2672         struct ps2dev *ps2dev = &psmouse->ps2dev;
2673         char param[2] = {0x64, 0x28};
2674         int ret = -1;
2675
2676         /* enter absolute mode */
2677         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2678             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2679             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2680             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2681                 goto error;
2682         }
2683
2684         /* T.B.D. Decread noise packet number, delete in the future */
2685         if (alps_exit_command_mode(psmouse) ||
2686             alps_enter_command_mode(psmouse) ||
2687             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2688                 goto error;
2689         }
2690         alps_exit_command_mode(psmouse);
2691
2692         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2693
2694 error:
2695         alps_exit_command_mode(psmouse);
2696         return ret;
2697 }
2698
2699 static int alps_set_protocol(struct psmouse *psmouse,
2700                              struct alps_data *priv,
2701                              const struct alps_protocol_info *protocol)
2702 {
2703         psmouse->private = priv;
2704
2705         timer_setup(&priv->timer, alps_flush_packet, 0);
2706
2707         priv->proto_version = protocol->version;
2708         priv->byte0 = protocol->byte0;
2709         priv->mask0 = protocol->mask0;
2710         priv->flags = protocol->flags;
2711
2712         priv->x_max = 2000;
2713         priv->y_max = 1400;
2714         priv->x_bits = 15;
2715         priv->y_bits = 11;
2716
2717         switch (priv->proto_version) {
2718         case ALPS_PROTO_V1:
2719         case ALPS_PROTO_V2:
2720                 priv->hw_init = alps_hw_init_v1_v2;
2721                 priv->process_packet = alps_process_packet_v1_v2;
2722                 priv->set_abs_params = alps_set_abs_params_st;
2723                 priv->x_max = 1023;
2724                 priv->y_max = 767;
2725                 if (dmi_check_system(alps_dmi_has_separate_stick_buttons))
2726                         priv->flags |= ALPS_STICK_BITS;
2727                 break;
2728
2729         case ALPS_PROTO_V3:
2730                 priv->hw_init = alps_hw_init_v3;
2731                 priv->process_packet = alps_process_packet_v3;
2732                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2733                 priv->decode_fields = alps_decode_pinnacle;
2734                 priv->nibble_commands = alps_v3_nibble_commands;
2735                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2736
2737                 if (alps_probe_trackstick_v3_v7(psmouse,
2738                                                 ALPS_REG_BASE_PINNACLE) < 0)
2739                         priv->flags &= ~ALPS_DUALPOINT;
2740
2741                 break;
2742
2743         case ALPS_PROTO_V3_RUSHMORE:
2744                 priv->hw_init = alps_hw_init_rushmore_v3;
2745                 priv->process_packet = alps_process_packet_v3;
2746                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2747                 priv->decode_fields = alps_decode_rushmore;
2748                 priv->nibble_commands = alps_v3_nibble_commands;
2749                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2750                 priv->x_bits = 16;
2751                 priv->y_bits = 12;
2752
2753                 if (alps_probe_trackstick_v3_v7(psmouse,
2754                                                 ALPS_REG_BASE_RUSHMORE) < 0)
2755                         priv->flags &= ~ALPS_DUALPOINT;
2756
2757                 break;
2758
2759         case ALPS_PROTO_V4:
2760                 priv->hw_init = alps_hw_init_v4;
2761                 priv->process_packet = alps_process_packet_v4;
2762                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2763                 priv->nibble_commands = alps_v4_nibble_commands;
2764                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2765                 break;
2766
2767         case ALPS_PROTO_V5:
2768                 priv->hw_init = alps_hw_init_dolphin_v1;
2769                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2770                 priv->decode_fields = alps_decode_dolphin;
2771                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2772                 priv->nibble_commands = alps_v3_nibble_commands;
2773                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2774                 priv->x_bits = 23;
2775                 priv->y_bits = 12;
2776
2777                 if (alps_dolphin_get_device_area(psmouse, priv))
2778                         return -EIO;
2779
2780                 break;
2781
2782         case ALPS_PROTO_V6:
2783                 priv->hw_init = alps_hw_init_v6;
2784                 priv->process_packet = alps_process_packet_v6;
2785                 priv->set_abs_params = alps_set_abs_params_st;
2786                 priv->nibble_commands = alps_v6_nibble_commands;
2787                 priv->x_max = 2047;
2788                 priv->y_max = 1535;
2789                 break;
2790
2791         case ALPS_PROTO_V7:
2792                 priv->hw_init = alps_hw_init_v7;
2793                 priv->process_packet = alps_process_packet_v7;
2794                 priv->decode_fields = alps_decode_packet_v7;
2795                 priv->set_abs_params = alps_set_abs_params_v7;
2796                 priv->nibble_commands = alps_v3_nibble_commands;
2797                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2798                 priv->x_max = 0xfff;
2799                 priv->y_max = 0x7ff;
2800
2801                 if (priv->fw_ver[1] != 0xba)
2802                         priv->flags |= ALPS_BUTTONPAD;
2803
2804                 if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
2805                         priv->flags &= ~ALPS_DUALPOINT;
2806
2807                 break;
2808
2809         case ALPS_PROTO_V8:
2810                 priv->hw_init = alps_hw_init_ss4_v2;
2811                 priv->process_packet = alps_process_packet_ss4_v2;
2812                 priv->decode_fields = alps_decode_ss4_v2;
2813                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2814                 priv->nibble_commands = alps_v3_nibble_commands;
2815                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2816
2817                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2818                         return -EIO;
2819
2820                 break;
2821         }
2822
2823         return 0;
2824 }
2825
2826 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2827                                                          unsigned char *ec)
2828 {
2829         const struct alps_model_info *model;
2830         int i;
2831
2832         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2833                 model = &alps_model_data[i];
2834
2835                 if (!memcmp(e7, model->signature, sizeof(model->signature)))
2836                         return &model->protocol_info;
2837         }
2838
2839         return NULL;
2840 }
2841
2842 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2843 {
2844         const struct alps_protocol_info *protocol;
2845         unsigned char e6[4], e7[4], ec[4];
2846         int error;
2847
2848         /*
2849          * First try "E6 report".
2850          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2851          * The bits 0-2 of the first byte will be 1s if some buttons are
2852          * pressed.
2853          */
2854         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2855                          PSMOUSE_CMD_SETSCALE11, e6))
2856                 return -EIO;
2857
2858         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2859                 return -EINVAL;
2860
2861         /*
2862          * Now get the "E7" and "EC" reports.  These will uniquely identify
2863          * most ALPS touchpads.
2864          */
2865         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2866                          PSMOUSE_CMD_SETSCALE21, e7) ||
2867             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2868                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2869             alps_exit_command_mode(psmouse))
2870                 return -EIO;
2871
2872         protocol = alps_match_table(e7, ec);
2873         if (!protocol) {
2874                 if (e7[0] == 0x73 && e7[1] == 0x02 && e7[2] == 0x64 &&
2875                            ec[2] == 0x8a) {
2876                         protocol = &alps_v4_protocol_data;
2877                 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2878                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2879                         protocol = &alps_v5_protocol_data;
2880                 } else if (ec[0] == 0x88 &&
2881                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2882                         protocol = &alps_v7_protocol_data;
2883                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2884                         protocol = &alps_v3_rushmore_data;
2885                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2886                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2887                         protocol = &alps_v3_protocol_data;
2888                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2889                            (e7[2] == 0x14 || e7[2] == 0x28)) {
2890                         protocol = &alps_v8_protocol_data;
2891                 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0xc8) {
2892                         protocol = &alps_v9_protocol_data;
2893                         psmouse_warn(psmouse,
2894                                      "Unsupported ALPS V9 touchpad: E7=%3ph, EC=%3ph\n",
2895                                      e7, ec);
2896                         return -EINVAL;
2897                 } else {
2898                         psmouse_dbg(psmouse,
2899                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2900                         return -EINVAL;
2901                 }
2902         }
2903
2904         if (priv) {
2905                 /* Save Device ID and Firmware version */
2906                 memcpy(priv->dev_id, e7, 3);
2907                 memcpy(priv->fw_ver, ec, 3);
2908                 error = alps_set_protocol(psmouse, priv, protocol);
2909                 if (error)
2910                         return error;
2911         }
2912
2913         return 0;
2914 }
2915
2916 static int alps_reconnect(struct psmouse *psmouse)
2917 {
2918         struct alps_data *priv = psmouse->private;
2919
2920         psmouse_reset(psmouse);
2921
2922         if (alps_identify(psmouse, priv) < 0)
2923                 return -1;
2924
2925         return priv->hw_init(psmouse);
2926 }
2927
2928 static void alps_disconnect(struct psmouse *psmouse)
2929 {
2930         struct alps_data *priv = psmouse->private;
2931
2932         psmouse_reset(psmouse);
2933         del_timer_sync(&priv->timer);
2934         if (priv->dev2)
2935                 input_unregister_device(priv->dev2);
2936         if (!IS_ERR_OR_NULL(priv->dev3))
2937                 input_unregister_device(priv->dev3);
2938         kfree(priv);
2939 }
2940
2941 static void alps_set_abs_params_st(struct alps_data *priv,
2942                                    struct input_dev *dev1)
2943 {
2944         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2945         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2946         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2947 }
2948
2949 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2950                                           struct input_dev *dev1)
2951 {
2952         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2953         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2954
2955         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2956         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2957
2958         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2959         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2960 }
2961
2962 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
2963                                         struct input_dev *dev1)
2964 {
2965         alps_set_abs_params_mt_common(priv, dev1);
2966         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2967
2968         input_mt_init_slots(dev1, MAX_TOUCHES,
2969                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2970                                 INPUT_MT_SEMI_MT);
2971 }
2972
2973 static void alps_set_abs_params_v7(struct alps_data *priv,
2974                                    struct input_dev *dev1)
2975 {
2976         alps_set_abs_params_mt_common(priv, dev1);
2977         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2978
2979         input_mt_init_slots(dev1, MAX_TOUCHES,
2980                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2981                                 INPUT_MT_TRACK);
2982
2983         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2984 }
2985
2986 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2987                                        struct input_dev *dev1)
2988 {
2989         alps_set_abs_params_mt_common(priv, dev1);
2990         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2991         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2992
2993         input_mt_init_slots(dev1, MAX_TOUCHES,
2994                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2995                                 INPUT_MT_TRACK);
2996 }
2997
2998 int alps_init(struct psmouse *psmouse)
2999 {
3000         struct alps_data *priv = psmouse->private;
3001         struct input_dev *dev1 = psmouse->dev;
3002         int error;
3003
3004         error = priv->hw_init(psmouse);
3005         if (error)
3006                 goto init_fail;
3007
3008         /*
3009          * Undo part of setup done for us by psmouse core since touchpad
3010          * is not a relative device.
3011          */
3012         __clear_bit(EV_REL, dev1->evbit);
3013         __clear_bit(REL_X, dev1->relbit);
3014         __clear_bit(REL_Y, dev1->relbit);
3015
3016         /*
3017          * Now set up our capabilities.
3018          */
3019         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
3020         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
3021         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
3022         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
3023                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
3024
3025         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
3026
3027         priv->set_abs_params(priv, dev1);
3028
3029         if (priv->flags & ALPS_WHEEL) {
3030                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
3031                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
3032         }
3033
3034         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
3035                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
3036                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
3037         }
3038
3039         if (priv->flags & ALPS_FOUR_BUTTONS) {
3040                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
3041                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
3042                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
3043                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
3044         } else if (priv->flags & ALPS_BUTTONPAD) {
3045                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
3046                 clear_bit(BTN_RIGHT, dev1->keybit);
3047         } else {
3048                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
3049         }
3050
3051         if (priv->flags & ALPS_DUALPOINT) {
3052                 struct input_dev *dev2;
3053
3054                 dev2 = input_allocate_device();
3055                 if (!dev2) {
3056                         psmouse_err(psmouse,
3057                                     "failed to allocate trackstick device\n");
3058                         error = -ENOMEM;
3059                         goto init_fail;
3060                 }
3061
3062                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
3063                          psmouse->ps2dev.serio->phys);
3064                 dev2->phys = priv->phys2;
3065
3066                 /*
3067                  * format of input device name is: "protocol vendor name"
3068                  * see function psmouse_switch_protocol() in psmouse-base.c
3069                  */
3070                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
3071
3072                 dev2->id.bustype = BUS_I8042;
3073                 dev2->id.vendor  = 0x0002;
3074                 dev2->id.product = PSMOUSE_ALPS;
3075                 dev2->id.version = priv->proto_version;
3076                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
3077
3078                 input_set_capability(dev2, EV_REL, REL_X);
3079                 input_set_capability(dev2, EV_REL, REL_Y);
3080                 if (priv->flags & ALPS_DUALPOINT_WITH_PRESSURE) {
3081                         input_set_capability(dev2, EV_ABS, ABS_PRESSURE);
3082                         input_set_abs_params(dev2, ABS_PRESSURE, 0, 127, 0, 0);
3083                 }
3084                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
3085                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
3086                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
3087
3088                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
3089                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
3090
3091                 error = input_register_device(dev2);
3092                 if (error) {
3093                         psmouse_err(psmouse,
3094                                     "failed to register trackstick device: %d\n",
3095                                     error);
3096                         input_free_device(dev2);
3097                         goto init_fail;
3098                 }
3099
3100                 priv->dev2 = dev2;
3101         }
3102
3103         priv->psmouse = psmouse;
3104
3105         INIT_DELAYED_WORK(&priv->dev3_register_work,
3106                           alps_register_bare_ps2_mouse);
3107
3108         psmouse->protocol_handler = alps_process_byte;
3109         psmouse->poll = alps_poll;
3110         psmouse->disconnect = alps_disconnect;
3111         psmouse->reconnect = alps_reconnect;
3112         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
3113
3114         /* We are having trouble resyncing ALPS touchpads so disable it for now */
3115         psmouse->resync_time = 0;
3116
3117         /* Allow 2 invalid packets without resetting device */
3118         psmouse->resetafter = psmouse->pktsize * 2;
3119
3120         return 0;
3121
3122 init_fail:
3123         psmouse_reset(psmouse);
3124         /*
3125          * Even though we did not allocate psmouse->private we do free
3126          * it here.
3127          */
3128         kfree(psmouse->private);
3129         psmouse->private = NULL;
3130         return error;
3131 }
3132
3133 int alps_detect(struct psmouse *psmouse, bool set_properties)
3134 {
3135         struct alps_data *priv;
3136         int error;
3137
3138         error = alps_identify(psmouse, NULL);
3139         if (error)
3140                 return error;
3141
3142         /*
3143          * Reset the device to make sure it is fully operational:
3144          * on some laptops, like certain Dell Latitudes, we may
3145          * fail to properly detect presence of trackstick if device
3146          * has not been reset.
3147          */
3148         psmouse_reset(psmouse);
3149
3150         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
3151         if (!priv)
3152                 return -ENOMEM;
3153
3154         error = alps_identify(psmouse, priv);
3155         if (error) {
3156                 kfree(priv);
3157                 return error;
3158         }
3159
3160         if (set_properties) {
3161                 psmouse->vendor = "ALPS";
3162                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
3163                                 "DualPoint TouchPad" : "GlidePoint";
3164                 psmouse->model = priv->proto_version;
3165         } else {
3166                 /*
3167                  * Destroy alps_data structure we allocated earlier since
3168                  * this was just a "trial run". Otherwise we'll keep it
3169                  * to be used by alps_init() which has to be called if
3170                  * we succeed and set_properties is true.
3171                  */
3172                 kfree(priv);
3173                 psmouse->private = NULL;
3174         }
3175
3176         return 0;
3177 }
3178