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