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 unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)
1157 {
1158         unsigned char pkt_id = SS4_PACKET_ID_IDLE;
1159
1160         switch (byte[3] & 0x30) {
1161         case 0x00:
1162                 if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&
1163                     (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 &&
1164                     byte[5] == 0x00) {
1165                         pkt_id = SS4_PACKET_ID_IDLE;
1166                 } else {
1167                         pkt_id = SS4_PACKET_ID_ONE;
1168                 }
1169                 break;
1170         case 0x10:
1171                 /* two-finger finger positions */
1172                 pkt_id = SS4_PACKET_ID_TWO;
1173                 break;
1174         case 0x20:
1175                 /* stick pointer */
1176                 pkt_id = SS4_PACKET_ID_STICK;
1177                 break;
1178         case 0x30:
1179                 /* third and fourth finger positions */
1180                 pkt_id = SS4_PACKET_ID_MULTI;
1181                 break;
1182         }
1183
1184         return pkt_id;
1185 }
1186
1187 static int alps_decode_ss4_v2(struct alps_fields *f,
1188                               unsigned char *p, struct psmouse *psmouse)
1189 {
1190         struct alps_data *priv = psmouse->private;
1191         unsigned char pkt_id;
1192         unsigned int no_data_x, no_data_y;
1193
1194         pkt_id = alps_get_pkt_id_ss4_v2(p);
1195
1196         /* Current packet is 1Finger coordinate packet */
1197         switch (pkt_id) {
1198         case SS4_PACKET_ID_ONE:
1199                 f->mt[0].x = SS4_1F_X_V2(p);
1200                 f->mt[0].y = SS4_1F_Y_V2(p);
1201                 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1202                 /*
1203                  * When a button is held the device will give us events
1204                  * with x, y, and pressure of 0. This causes annoying jumps
1205                  * if a touch is released while the button is held.
1206                  * Handle this by claiming zero contacts.
1207                  */
1208                 f->fingers = f->pressure > 0 ? 1 : 0;
1209                 f->first_mp = 0;
1210                 f->is_mp = 0;
1211                 break;
1212
1213         case SS4_PACKET_ID_TWO:
1214                 if (priv->flags & ALPS_BUTTONPAD) {
1215                         f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1216                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1217                         f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1218                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1219                 } else {
1220                         f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1221                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1222                         f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1223                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1224                 }
1225                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1226
1227                 if (SS4_IS_MF_CONTINUE(p)) {
1228                         f->first_mp = 1;
1229                 } else {
1230                         f->fingers = 2;
1231                         f->first_mp = 0;
1232                 }
1233                 f->is_mp = 0;
1234
1235                 break;
1236
1237         case SS4_PACKET_ID_MULTI:
1238                 if (priv->flags & ALPS_BUTTONPAD) {
1239                         f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1240                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1241                         f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1242                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1243                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1244                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1245                 } else {
1246                         f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1247                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1248                         f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1249                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1250                         no_data_x = SS4_MFPACKET_NO_AX;
1251                         no_data_y = SS4_MFPACKET_NO_AY;
1252                 }
1253
1254                 f->first_mp = 0;
1255                 f->is_mp = 1;
1256
1257                 if (SS4_IS_5F_DETECTED(p)) {
1258                         f->fingers = 5;
1259                 } else if (f->mt[3].x == no_data_x &&
1260                              f->mt[3].y == no_data_y) {
1261                         f->mt[3].x = 0;
1262                         f->mt[3].y = 0;
1263                         f->fingers = 3;
1264                 } else {
1265                         f->fingers = 4;
1266                 }
1267                 break;
1268
1269         case SS4_PACKET_ID_STICK:
1270                 if (!(priv->flags & ALPS_DUALPOINT)) {
1271                         psmouse_warn(psmouse,
1272                                      "Rejected trackstick packet from non DualPoint device");
1273                 } else {
1274                         int x = (s8)(((p[0] & 1) << 7) | (p[1] & 0x7f));
1275                         int y = (s8)(((p[3] & 1) << 7) | (p[2] & 0x7f));
1276                         int pressure = (s8)(p[4] & 0x7f);
1277
1278                         input_report_rel(priv->dev2, REL_X, x);
1279                         input_report_rel(priv->dev2, REL_Y, -y);
1280                         input_report_abs(priv->dev2, ABS_PRESSURE, pressure);
1281                 }
1282                 break;
1283
1284         case SS4_PACKET_ID_IDLE:
1285         default:
1286                 memset(f, 0, sizeof(struct alps_fields));
1287                 break;
1288         }
1289
1290         /* handle buttons */
1291         if (pkt_id == SS4_PACKET_ID_STICK) {
1292                 f->ts_left = !!(SS4_BTN_V2(p) & 0x01);
1293                 if (!(priv->flags & ALPS_BUTTONPAD)) {
1294                         f->ts_right = !!(SS4_BTN_V2(p) & 0x02);
1295                         f->ts_middle = !!(SS4_BTN_V2(p) & 0x04);
1296                 }
1297         } else {
1298                 f->left = !!(SS4_BTN_V2(p) & 0x01);
1299                 if (!(priv->flags & ALPS_BUTTONPAD)) {
1300                         f->right = !!(SS4_BTN_V2(p) & 0x02);
1301                         f->middle = !!(SS4_BTN_V2(p) & 0x04);
1302                 }
1303         }
1304
1305         return 0;
1306 }
1307
1308 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1309 {
1310         struct alps_data *priv = psmouse->private;
1311         unsigned char *packet = psmouse->packet;
1312         struct input_dev *dev = psmouse->dev;
1313         struct input_dev *dev2 = priv->dev2;
1314         struct alps_fields *f = &priv->f;
1315
1316         memset(f, 0, sizeof(struct alps_fields));
1317         priv->decode_fields(f, packet, psmouse);
1318         if (priv->multi_packet) {
1319                 /*
1320                  * Sometimes the first packet will indicate a multi-packet
1321                  * sequence, but sometimes the next multi-packet would not
1322                  * come. Check for this, and when it happens process the
1323                  * position packet as usual.
1324                  */
1325                 if (f->is_mp) {
1326                         /* Now process the 1st packet */
1327                         priv->decode_fields(f, priv->multi_data, psmouse);
1328                 } else {
1329                         priv->multi_packet = 0;
1330                 }
1331         }
1332
1333         /*
1334          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1335          * When it is set, it means 2nd packet comes without 1st packet come.
1336          */
1337         if (f->is_mp)
1338                 return;
1339
1340         /* Save the first packet */
1341         if (!priv->multi_packet && f->first_mp) {
1342                 priv->multi_packet = 1;
1343                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1344                 return;
1345         }
1346
1347         priv->multi_packet = 0;
1348
1349         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1350
1351         input_mt_report_finger_count(dev, f->fingers);
1352
1353         input_report_key(dev, BTN_LEFT, f->left);
1354         input_report_key(dev, BTN_RIGHT, f->right);
1355         input_report_key(dev, BTN_MIDDLE, f->middle);
1356
1357         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1358         input_sync(dev);
1359
1360         if (priv->flags & ALPS_DUALPOINT) {
1361                 input_report_key(dev2, BTN_LEFT, f->ts_left);
1362                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
1363                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
1364                 input_sync(dev2);
1365         }
1366 }
1367
1368 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1369 {
1370         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1371                 return false;
1372         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1373                 return false;
1374         return true;
1375 }
1376
1377 static DEFINE_MUTEX(alps_mutex);
1378
1379 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1380 {
1381         struct alps_data *priv =
1382                 container_of(work, struct alps_data, dev3_register_work.work);
1383         struct psmouse *psmouse = priv->psmouse;
1384         struct input_dev *dev3;
1385         int error = 0;
1386
1387         mutex_lock(&alps_mutex);
1388
1389         if (priv->dev3)
1390                 goto out;
1391
1392         dev3 = input_allocate_device();
1393         if (!dev3) {
1394                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1395                 error = -ENOMEM;
1396                 goto out;
1397         }
1398
1399         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1400                  psmouse->ps2dev.serio->phys,
1401                  (priv->dev2 ? "input2" : "input1"));
1402         dev3->phys = priv->phys3;
1403
1404         /*
1405          * format of input device name is: "protocol vendor name"
1406          * see function psmouse_switch_protocol() in psmouse-base.c
1407          */
1408         dev3->name = "PS/2 ALPS Mouse";
1409
1410         dev3->id.bustype = BUS_I8042;
1411         dev3->id.vendor  = 0x0002;
1412         dev3->id.product = PSMOUSE_PS2;
1413         dev3->id.version = 0x0000;
1414         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1415
1416         input_set_capability(dev3, EV_REL, REL_X);
1417         input_set_capability(dev3, EV_REL, REL_Y);
1418         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1419         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1420         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1421
1422         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1423
1424         error = input_register_device(dev3);
1425         if (error) {
1426                 psmouse_err(psmouse,
1427                             "failed to register secondary device: %d\n",
1428                             error);
1429                 input_free_device(dev3);
1430                 goto out;
1431         }
1432
1433         priv->dev3 = dev3;
1434
1435 out:
1436         /*
1437          * Save the error code so that we can detect that we
1438          * already tried to create the device.
1439          */
1440         if (error)
1441                 priv->dev3 = ERR_PTR(error);
1442
1443         mutex_unlock(&alps_mutex);
1444 }
1445
1446 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1447                                         unsigned char packet[],
1448                                         bool report_buttons)
1449 {
1450         struct alps_data *priv = psmouse->private;
1451         struct input_dev *dev, *dev2 = NULL;
1452
1453         /* Figure out which device to use to report the bare packet */
1454         if (priv->proto_version == ALPS_PROTO_V2 &&
1455             (priv->flags & ALPS_DUALPOINT)) {
1456                 /* On V2 devices the DualPoint Stick reports bare packets */
1457                 dev = priv->dev2;
1458                 dev2 = psmouse->dev;
1459         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1460                 /* Register dev3 mouse if we received PS/2 packet first time */
1461                 if (!IS_ERR(priv->dev3))
1462                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1463                                            0);
1464                 return;
1465         } else {
1466                 dev = priv->dev3;
1467         }
1468
1469         if (report_buttons)
1470                 alps_report_buttons(dev, dev2,
1471                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1472
1473         input_report_rel(dev, REL_X,
1474                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1475         input_report_rel(dev, REL_Y,
1476                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1477
1478         input_sync(dev);
1479 }
1480
1481 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1482 {
1483         struct alps_data *priv = psmouse->private;
1484
1485         if (psmouse->pktcnt < 6)
1486                 return PSMOUSE_GOOD_DATA;
1487
1488         if (psmouse->pktcnt == 6) {
1489                 /*
1490                  * Start a timer to flush the packet if it ends up last
1491                  * 6-byte packet in the stream. Timer needs to fire
1492                  * psmouse core times out itself. 20 ms should be enough
1493                  * to decide if we are getting more data or not.
1494                  */
1495                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1496                 return PSMOUSE_GOOD_DATA;
1497         }
1498
1499         del_timer(&priv->timer);
1500
1501         if (psmouse->packet[6] & 0x80) {
1502
1503                 /*
1504                  * Highest bit is set - that means we either had
1505                  * complete ALPS packet and this is start of the
1506                  * next packet or we got garbage.
1507                  */
1508
1509                 if (((psmouse->packet[3] |
1510                       psmouse->packet[4] |
1511                       psmouse->packet[5]) & 0x80) ||
1512                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1513                         psmouse_dbg(psmouse,
1514                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1515                                     psmouse->packet + 3);
1516                         return PSMOUSE_BAD_DATA;
1517                 }
1518
1519                 priv->process_packet(psmouse);
1520
1521                 /* Continue with the next packet */
1522                 psmouse->packet[0] = psmouse->packet[6];
1523                 psmouse->pktcnt = 1;
1524
1525         } else {
1526
1527                 /*
1528                  * High bit is 0 - that means that we indeed got a PS/2
1529                  * packet in the middle of ALPS packet.
1530                  *
1531                  * There is also possibility that we got 6-byte ALPS
1532                  * packet followed  by 3-byte packet from trackpoint. We
1533                  * can not distinguish between these 2 scenarios but
1534                  * because the latter is unlikely to happen in course of
1535                  * normal operation (user would need to press all
1536                  * buttons on the pad and start moving trackpoint
1537                  * without touching the pad surface) we assume former.
1538                  * Even if we are wrong the wost thing that would happen
1539                  * the cursor would jump but we should not get protocol
1540                  * de-synchronization.
1541                  */
1542
1543                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1544                                             false);
1545
1546                 /*
1547                  * Continue with the standard ALPS protocol handling,
1548                  * but make sure we won't process it as an interleaved
1549                  * packet again, which may happen if all buttons are
1550                  * pressed. To avoid this let's reset the 4th bit which
1551                  * is normally 1.
1552                  */
1553                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1554                 psmouse->pktcnt = 4;
1555         }
1556
1557         return PSMOUSE_GOOD_DATA;
1558 }
1559
1560 static void alps_flush_packet(unsigned long data)
1561 {
1562         struct psmouse *psmouse = (struct psmouse *)data;
1563         struct alps_data *priv = psmouse->private;
1564
1565         serio_pause_rx(psmouse->ps2dev.serio);
1566
1567         if (psmouse->pktcnt == psmouse->pktsize) {
1568
1569                 /*
1570                  * We did not any more data in reasonable amount of time.
1571                  * Validate the last 3 bytes and process as a standard
1572                  * ALPS packet.
1573                  */
1574                 if ((psmouse->packet[3] |
1575                      psmouse->packet[4] |
1576                      psmouse->packet[5]) & 0x80) {
1577                         psmouse_dbg(psmouse,
1578                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1579                                     psmouse->packet + 3);
1580                 } else {
1581                         priv->process_packet(psmouse);
1582                 }
1583                 psmouse->pktcnt = 0;
1584         }
1585
1586         serio_continue_rx(psmouse->ps2dev.serio);
1587 }
1588
1589 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1590 {
1591         struct alps_data *priv = psmouse->private;
1592
1593         /*
1594          * Check if we are dealing with a bare PS/2 packet, presumably from
1595          * a device connected to the external PS/2 port. Because bare PS/2
1596          * protocol does not have enough constant bits to self-synchronize
1597          * properly we only do this if the device is fully synchronized.
1598          * Can not distinguish V8's first byte from PS/2 packet's
1599          */
1600         if (priv->proto_version != ALPS_PROTO_V8 &&
1601             !psmouse->out_of_sync_cnt &&
1602             (psmouse->packet[0] & 0xc8) == 0x08) {
1603
1604                 if (psmouse->pktcnt == 3) {
1605                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1606                                                     true);
1607                         return PSMOUSE_FULL_PACKET;
1608                 }
1609                 return PSMOUSE_GOOD_DATA;
1610         }
1611
1612         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1613
1614         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1615             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1616                 return alps_handle_interleaved_ps2(psmouse);
1617         }
1618
1619         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1620                 psmouse_dbg(psmouse,
1621                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1622                             psmouse->packet[0], priv->mask0, priv->byte0);
1623                 return PSMOUSE_BAD_DATA;
1624         }
1625
1626         /* Bytes 2 - pktsize should have 0 in the highest bit */
1627         if (priv->proto_version < ALPS_PROTO_V5 &&
1628             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1629             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1630                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1631                             psmouse->pktcnt - 1,
1632                             psmouse->packet[psmouse->pktcnt - 1]);
1633
1634                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1635                     psmouse->pktcnt == psmouse->pktsize) {
1636                         /*
1637                          * Some Dell boxes, such as Latitude E6440 or E7440
1638                          * with closed lid, quite often smash last byte of
1639                          * otherwise valid packet with 0xff. Given that the
1640                          * next packet is very likely to be valid let's
1641                          * report PSMOUSE_FULL_PACKET but not process data,
1642                          * rather than reporting PSMOUSE_BAD_DATA and
1643                          * filling the logs.
1644                          */
1645                         return PSMOUSE_FULL_PACKET;
1646                 }
1647
1648                 return PSMOUSE_BAD_DATA;
1649         }
1650
1651         if ((priv->proto_version == ALPS_PROTO_V7 &&
1652                         !alps_is_valid_package_v7(psmouse)) ||
1653             (priv->proto_version == ALPS_PROTO_V8 &&
1654                         !alps_is_valid_package_ss4_v2(psmouse))) {
1655                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1656                             psmouse->pktcnt - 1,
1657                             psmouse->packet[psmouse->pktcnt - 1]);
1658                 return PSMOUSE_BAD_DATA;
1659         }
1660
1661         if (psmouse->pktcnt == psmouse->pktsize) {
1662                 priv->process_packet(psmouse);
1663                 return PSMOUSE_FULL_PACKET;
1664         }
1665
1666         return PSMOUSE_GOOD_DATA;
1667 }
1668
1669 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1670 {
1671         struct ps2dev *ps2dev = &psmouse->ps2dev;
1672         struct alps_data *priv = psmouse->private;
1673         int command;
1674         unsigned char *param;
1675         unsigned char dummy[4];
1676
1677         BUG_ON(nibble > 0xf);
1678
1679         command = priv->nibble_commands[nibble].command;
1680         param = (command & 0x0f00) ?
1681                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1682
1683         if (ps2_command(ps2dev, param, command))
1684                 return -1;
1685
1686         return 0;
1687 }
1688
1689 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1690 {
1691         struct ps2dev *ps2dev = &psmouse->ps2dev;
1692         struct alps_data *priv = psmouse->private;
1693         int i, nibble;
1694
1695         if (ps2_command(ps2dev, NULL, priv->addr_command))
1696                 return -1;
1697
1698         for (i = 12; i >= 0; i -= 4) {
1699                 nibble = (addr >> i) & 0xf;
1700                 if (alps_command_mode_send_nibble(psmouse, nibble))
1701                         return -1;
1702         }
1703
1704         return 0;
1705 }
1706
1707 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1708 {
1709         struct ps2dev *ps2dev = &psmouse->ps2dev;
1710         unsigned char param[4];
1711
1712         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1713                 return -1;
1714
1715         /*
1716          * The address being read is returned in the first two bytes
1717          * of the result. Check that this address matches the expected
1718          * address.
1719          */
1720         if (addr != ((param[0] << 8) | param[1]))
1721                 return -1;
1722
1723         return param[2];
1724 }
1725
1726 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1727 {
1728         if (alps_command_mode_set_addr(psmouse, addr))
1729                 return -1;
1730         return __alps_command_mode_read_reg(psmouse, addr);
1731 }
1732
1733 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1734 {
1735         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1736                 return -1;
1737         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1738                 return -1;
1739         return 0;
1740 }
1741
1742 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1743                                        u8 value)
1744 {
1745         if (alps_command_mode_set_addr(psmouse, addr))
1746                 return -1;
1747         return __alps_command_mode_write_reg(psmouse, value);
1748 }
1749
1750 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1751                         int repeated_command, unsigned char *param)
1752 {
1753         struct ps2dev *ps2dev = &psmouse->ps2dev;
1754
1755         param[0] = 0;
1756         if (init_command && ps2_command(ps2dev, param, init_command))
1757                 return -EIO;
1758
1759         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1760             ps2_command(ps2dev,  NULL, repeated_command) ||
1761             ps2_command(ps2dev,  NULL, repeated_command))
1762                 return -EIO;
1763
1764         param[0] = param[1] = param[2] = 0xff;
1765         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1766                 return -EIO;
1767
1768         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1769                     repeated_command, param);
1770         return 0;
1771 }
1772
1773 static bool alps_check_valid_firmware_id(unsigned char id[])
1774 {
1775         if (id[0] == 0x73)
1776                 return true;
1777
1778         if (id[0] == 0x88 &&
1779             (id[1] == 0x07 ||
1780              id[1] == 0x08 ||
1781              (id[1] & 0xf0) == 0xb0 ||
1782              (id[1] & 0xf0) == 0xc0)) {
1783                 return true;
1784         }
1785
1786         return false;
1787 }
1788
1789 static int alps_enter_command_mode(struct psmouse *psmouse)
1790 {
1791         unsigned char param[4];
1792
1793         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1794                 psmouse_err(psmouse, "failed to enter command mode\n");
1795                 return -1;
1796         }
1797
1798         if (!alps_check_valid_firmware_id(param)) {
1799                 psmouse_dbg(psmouse,
1800                             "unknown response while entering command mode\n");
1801                 return -1;
1802         }
1803         return 0;
1804 }
1805
1806 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1807 {
1808         struct ps2dev *ps2dev = &psmouse->ps2dev;
1809         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1810                 return -1;
1811         return 0;
1812 }
1813
1814 /*
1815  * For DualPoint devices select the device that should respond to
1816  * subsequent commands. It looks like glidepad is behind stickpointer,
1817  * I'd thought it would be other way around...
1818  */
1819 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1820 {
1821         struct ps2dev *ps2dev = &psmouse->ps2dev;
1822         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1823
1824         if (ps2_command(ps2dev, NULL, cmd) ||
1825             ps2_command(ps2dev, NULL, cmd) ||
1826             ps2_command(ps2dev, NULL, cmd) ||
1827             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1828                 return -1;
1829
1830         /* we may get 3 more bytes, just ignore them */
1831         ps2_drain(ps2dev, 3, 100);
1832
1833         return 0;
1834 }
1835
1836 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1837 {
1838         struct ps2dev *ps2dev = &psmouse->ps2dev;
1839
1840         /* Try ALPS magic knock - 4 disable before enable */
1841         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1842             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1843             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1844             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1845             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1846                 return -1;
1847
1848         /*
1849          * Switch mouse to poll (remote) mode so motion data will not
1850          * get in our way
1851          */
1852         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1853 }
1854
1855 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1856 {
1857         int i, nibble;
1858
1859         /*
1860          * b0-b11 are valid bits, send sequence is inverse.
1861          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1862          */
1863         for (i = 0; i <= 8; i += 4) {
1864                 nibble = (word >> i) & 0xf;
1865                 if (alps_command_mode_send_nibble(psmouse, nibble))
1866                         return -1;
1867         }
1868
1869         return 0;
1870 }
1871
1872 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1873                                        u16 addr, u16 value)
1874 {
1875         struct ps2dev *ps2dev = &psmouse->ps2dev;
1876
1877         /* 0x0A0 is the command to write the word */
1878         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1879             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1880             alps_monitor_mode_send_word(psmouse, addr) ||
1881             alps_monitor_mode_send_word(psmouse, value) ||
1882             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1883                 return -1;
1884
1885         return 0;
1886 }
1887
1888 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1889 {
1890         struct ps2dev *ps2dev = &psmouse->ps2dev;
1891
1892         if (enable) {
1893                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1894                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1895                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1896                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1897                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1898                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1899                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1900                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1901                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1902                         return -1;
1903         } else {
1904                 /* EC to exit monitor mode */
1905                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1906                         return -1;
1907         }
1908
1909         return 0;
1910 }
1911
1912 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1913 {
1914         u16 reg_val = 0x181;
1915         int ret = -1;
1916
1917         /* enter monitor mode, to write the register */
1918         if (alps_monitor_mode(psmouse, true))
1919                 return -1;
1920
1921         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1922
1923         if (alps_monitor_mode(psmouse, false))
1924                 ret = -1;
1925
1926         return ret;
1927 }
1928
1929 static int alps_get_status(struct psmouse *psmouse, char *param)
1930 {
1931         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1932         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1933                 return -1;
1934
1935         return 0;
1936 }
1937
1938 /*
1939  * Turn touchpad tapping on or off. The sequences are:
1940  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1941  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1942  * My guess that 0xE9 (GetInfo) is here as a sync point.
1943  * For models that also have stickpointer (DualPoints) its tapping
1944  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1945  * we don't fiddle with it.
1946  */
1947 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1948 {
1949         struct ps2dev *ps2dev = &psmouse->ps2dev;
1950         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1951         unsigned char tap_arg = enable ? 0x0A : 0x00;
1952         unsigned char param[4];
1953
1954         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1955             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1956             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1957             ps2_command(ps2dev, &tap_arg, cmd))
1958                 return -1;
1959
1960         if (alps_get_status(psmouse, param))
1961                 return -1;
1962
1963         return 0;
1964 }
1965
1966 /*
1967  * alps_poll() - poll the touchpad for current motion packet.
1968  * Used in resync.
1969  */
1970 static int alps_poll(struct psmouse *psmouse)
1971 {
1972         struct alps_data *priv = psmouse->private;
1973         unsigned char buf[sizeof(psmouse->packet)];
1974         bool poll_failed;
1975
1976         if (priv->flags & ALPS_PASS)
1977                 alps_passthrough_mode_v2(psmouse, true);
1978
1979         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1980                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1981
1982         if (priv->flags & ALPS_PASS)
1983                 alps_passthrough_mode_v2(psmouse, false);
1984
1985         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1986                 return -1;
1987
1988         if ((psmouse->badbyte & 0xc8) == 0x08) {
1989 /*
1990  * Poll the track stick ...
1991  */
1992                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1993                         return -1;
1994         }
1995
1996         memcpy(psmouse->packet, buf, sizeof(buf));
1997         return 0;
1998 }
1999
2000 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
2001 {
2002         struct alps_data *priv = psmouse->private;
2003
2004         if ((priv->flags & ALPS_PASS) &&
2005             alps_passthrough_mode_v2(psmouse, true)) {
2006                 return -1;
2007         }
2008
2009         if (alps_tap_mode(psmouse, true)) {
2010                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
2011                 return -1;
2012         }
2013
2014         if (alps_absolute_mode_v1_v2(psmouse)) {
2015                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2016                 return -1;
2017         }
2018
2019         if ((priv->flags & ALPS_PASS) &&
2020             alps_passthrough_mode_v2(psmouse, false)) {
2021                 return -1;
2022         }
2023
2024         /* ALPS needs stream mode, otherwise it won't report any data */
2025         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
2026                 psmouse_err(psmouse, "Failed to enable stream mode\n");
2027                 return -1;
2028         }
2029
2030         return 0;
2031 }
2032
2033 static int alps_hw_init_v6(struct psmouse *psmouse)
2034 {
2035         unsigned char param[2] = {0xC8, 0x14};
2036
2037         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
2038         if (alps_passthrough_mode_v2(psmouse, true))
2039                 return -1;
2040
2041         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2042             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2043             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2044             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2045             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2046                 return -1;
2047
2048         if (alps_passthrough_mode_v2(psmouse, false))
2049                 return -1;
2050
2051         if (alps_absolute_mode_v6(psmouse)) {
2052                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2053                 return -1;
2054         }
2055
2056         return 0;
2057 }
2058
2059 /*
2060  * Enable or disable passthrough mode to the trackstick.
2061  */
2062 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
2063                                     int reg_base, bool enable)
2064 {
2065         int reg_val, ret = -1;
2066
2067         if (alps_enter_command_mode(psmouse))
2068                 return -1;
2069
2070         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
2071         if (reg_val == -1)
2072                 goto error;
2073
2074         if (enable)
2075                 reg_val |= 0x01;
2076         else
2077                 reg_val &= ~0x01;
2078
2079         ret = __alps_command_mode_write_reg(psmouse, reg_val);
2080
2081 error:
2082         if (alps_exit_command_mode(psmouse))
2083                 ret = -1;
2084         return ret;
2085 }
2086
2087 /* Must be in command mode when calling this function */
2088 static int alps_absolute_mode_v3(struct psmouse *psmouse)
2089 {
2090         int reg_val;
2091
2092         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2093         if (reg_val == -1)
2094                 return -1;
2095
2096         reg_val |= 0x06;
2097         if (__alps_command_mode_write_reg(psmouse, reg_val))
2098                 return -1;
2099
2100         return 0;
2101 }
2102
2103 static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base)
2104 {
2105         int ret = -EIO, reg_val;
2106
2107         if (alps_enter_command_mode(psmouse))
2108                 goto error;
2109
2110         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2111         if (reg_val == -1)
2112                 goto error;
2113
2114         /* bit 7: trackstick is present */
2115         ret = reg_val & 0x80 ? 0 : -ENODEV;
2116
2117 error:
2118         alps_exit_command_mode(psmouse);
2119         return ret;
2120 }
2121
2122 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2123 {
2124         struct ps2dev *ps2dev = &psmouse->ps2dev;
2125         int ret = 0;
2126         unsigned char param[4];
2127
2128         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2129                 return -EIO;
2130
2131         /*
2132          * E7 report for the trackstick
2133          *
2134          * There have been reports of failures to seem to trace back
2135          * to the above trackstick check failing. When these occur
2136          * this E7 report fails, so when that happens we continue
2137          * with the assumption that there isn't a trackstick after
2138          * all.
2139          */
2140         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2141                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2142                 ret = -ENODEV;
2143         } else {
2144                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2145
2146                 /*
2147                  * Not sure what this does, but it is absolutely
2148                  * essential. Without it, the touchpad does not
2149                  * work at all and the trackstick just emits normal
2150                  * PS/2 packets.
2151                  */
2152                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2153                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2154                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2155                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2156                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2157                         psmouse_err(psmouse,
2158                                     "Error sending magic E6 sequence\n");
2159                         ret = -EIO;
2160                         goto error;
2161                 }
2162
2163                 /*
2164                  * This ensures the trackstick packets are in the format
2165                  * supported by this driver. If bit 1 isn't set the packet
2166                  * format is different.
2167                  */
2168                 if (alps_enter_command_mode(psmouse) ||
2169                     alps_command_mode_write_reg(psmouse,
2170                                                 reg_base + 0x08, 0x82) ||
2171                     alps_exit_command_mode(psmouse))
2172                         ret = -EIO;
2173         }
2174
2175 error:
2176         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2177                 ret = -EIO;
2178
2179         return ret;
2180 }
2181
2182 static int alps_hw_init_v3(struct psmouse *psmouse)
2183 {
2184         struct alps_data *priv = psmouse->private;
2185         struct ps2dev *ps2dev = &psmouse->ps2dev;
2186         int reg_val;
2187         unsigned char param[4];
2188
2189         if ((priv->flags & ALPS_DUALPOINT) &&
2190             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2191                 goto error;
2192
2193         if (alps_enter_command_mode(psmouse) ||
2194             alps_absolute_mode_v3(psmouse)) {
2195                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2196                 goto error;
2197         }
2198
2199         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2200         if (reg_val == -1)
2201                 goto error;
2202         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2203                 goto error;
2204
2205         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2206         if (reg_val == -1)
2207                 goto error;
2208         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2209                 goto error;
2210
2211         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2212                 goto error;
2213         if (__alps_command_mode_write_reg(psmouse, 0x04))
2214                 goto error;
2215
2216         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2217                 goto error;
2218         if (__alps_command_mode_write_reg(psmouse, 0x03))
2219                 goto error;
2220
2221         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2222                 goto error;
2223         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2224                 goto error;
2225
2226         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2227                 goto error;
2228         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2229                 goto error;
2230
2231         alps_exit_command_mode(psmouse);
2232
2233         /* Set rate and enable data reporting */
2234         param[0] = 0x64;
2235         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2236             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2237                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2238                 return -1;
2239         }
2240
2241         return 0;
2242
2243 error:
2244         /*
2245          * Leaving the touchpad in command mode will essentially render
2246          * it unusable until the machine reboots, so exit it here just
2247          * to be safe
2248          */
2249         alps_exit_command_mode(psmouse);
2250         return -1;
2251 }
2252
2253 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2254 {
2255         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2256         struct alps_data *priv = psmouse->private;
2257
2258         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2259         if (reg < 0)
2260                 return reg;
2261
2262         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2263         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2264
2265         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2266         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2267
2268         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2269         if (reg < 0)
2270                 return reg;
2271
2272         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2273         x_electrode = 17 + x_electrode;
2274
2275         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2276         y_electrode = 13 + y_electrode;
2277
2278         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2279         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2280
2281         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2282         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2283
2284         psmouse_dbg(psmouse,
2285                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2286                     x_pitch, y_pitch, x_electrode, y_electrode,
2287                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2288
2289         return 0;
2290 }
2291
2292 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2293 {
2294         struct alps_data *priv = psmouse->private;
2295         struct ps2dev *ps2dev = &psmouse->ps2dev;
2296         int reg_val, ret = -1;
2297
2298         if (priv->flags & ALPS_DUALPOINT) {
2299                 reg_val = alps_setup_trackstick_v3(psmouse,
2300                                                    ALPS_REG_BASE_RUSHMORE);
2301                 if (reg_val == -EIO)
2302                         goto error;
2303         }
2304
2305         if (alps_enter_command_mode(psmouse) ||
2306             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2307             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2308                 goto error;
2309
2310         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2311                 goto error;
2312
2313         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2314         if (reg_val == -1)
2315                 goto error;
2316         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2317                 goto error;
2318
2319         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2320                 goto error;
2321
2322         /* enter absolute mode */
2323         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2324         if (reg_val == -1)
2325                 goto error;
2326         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2327                 goto error;
2328
2329         alps_exit_command_mode(psmouse);
2330         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2331
2332 error:
2333         alps_exit_command_mode(psmouse);
2334         return ret;
2335 }
2336
2337 /* Must be in command mode when calling this function */
2338 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2339 {
2340         int reg_val;
2341
2342         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2343         if (reg_val == -1)
2344                 return -1;
2345
2346         reg_val |= 0x02;
2347         if (__alps_command_mode_write_reg(psmouse, reg_val))
2348                 return -1;
2349
2350         return 0;
2351 }
2352
2353 static int alps_hw_init_v4(struct psmouse *psmouse)
2354 {
2355         struct ps2dev *ps2dev = &psmouse->ps2dev;
2356         unsigned char param[4];
2357
2358         if (alps_enter_command_mode(psmouse))
2359                 goto error;
2360
2361         if (alps_absolute_mode_v4(psmouse)) {
2362                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2363                 goto error;
2364         }
2365
2366         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2367                 goto error;
2368
2369         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2370                 goto error;
2371
2372         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2373                 goto error;
2374
2375         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2376                 goto error;
2377
2378         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2379                 goto error;
2380
2381         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2382                 goto error;
2383
2384         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2385                 goto error;
2386
2387         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2388                 goto error;
2389
2390         alps_exit_command_mode(psmouse);
2391
2392         /*
2393          * This sequence changes the output from a 9-byte to an
2394          * 8-byte format. All the same data seems to be present,
2395          * just in a more compact format.
2396          */
2397         param[0] = 0xc8;
2398         param[1] = 0x64;
2399         param[2] = 0x50;
2400         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2401             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2402             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2403             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2404                 return -1;
2405
2406         /* Set rate and enable data reporting */
2407         param[0] = 0x64;
2408         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2409             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2410                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2411                 return -1;
2412         }
2413
2414         return 0;
2415
2416 error:
2417         /*
2418          * Leaving the touchpad in command mode will essentially render
2419          * it unusable until the machine reboots, so exit it here just
2420          * to be safe
2421          */
2422         alps_exit_command_mode(psmouse);
2423         return -1;
2424 }
2425
2426 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2427                                       unsigned char index, unsigned char otp[])
2428 {
2429         struct ps2dev *ps2dev = &psmouse->ps2dev;
2430
2431         switch (index) {
2432         case 0:
2433                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2434                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2435                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2436                         return -1;
2437
2438                 break;
2439
2440         case 1:
2441                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2442                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2443                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2444                         return -1;
2445
2446                 break;
2447         }
2448
2449         return 0;
2450 }
2451
2452 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2453                                           struct alps_data *priv)
2454 {
2455         int num_x_electrode;
2456         int num_y_electrode;
2457         int x_pitch, y_pitch, x_phys, y_phys;
2458
2459         num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2460         num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2461
2462         priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2463         priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2464
2465         x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2466         y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2467
2468         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2469         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2470
2471         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2472         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2473
2474         return 0;
2475 }
2476
2477 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2478                                        struct alps_data *priv)
2479 {
2480         unsigned char is_btnless;
2481
2482         is_btnless = (otp[1][1] >> 3) & 0x01;
2483
2484         if (is_btnless)
2485                 priv->flags |= ALPS_BUTTONPAD;
2486
2487         return 0;
2488 }
2489
2490 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2491                                     struct alps_data *priv)
2492 {
2493         unsigned char otp[2][4];
2494
2495         memset(otp, 0, sizeof(otp));
2496
2497         if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2498             alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2499                 return -1;
2500
2501         alps_update_device_area_ss4_v2(otp, priv);
2502
2503         alps_update_btn_info_ss4_v2(otp, priv);
2504
2505         return 0;
2506 }
2507
2508 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2509                                         struct alps_data *priv)
2510 {
2511         struct ps2dev *ps2dev = &psmouse->ps2dev;
2512         unsigned char param[4] = {0};
2513         int num_x_electrode, num_y_electrode;
2514
2515         if (alps_enter_command_mode(psmouse))
2516                 return -1;
2517
2518         param[0] = 0x0a;
2519         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2520             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2521             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2522             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2523             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2524                 return -1;
2525
2526         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2527                 return -1;
2528
2529         /*
2530          * Dolphin's sensor line number is not fixed. It can be calculated
2531          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2532          * Further more, we can get device's x_max and y_max by multiplying
2533          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2534          *
2535          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2536          *      real sensor line number X = 11 + 8 = 19, and
2537          *      real sensor line number Y = 8 + 1 = 9.
2538          *      So, x_max = (19 - 1) * 64 = 1152, and
2539          *          y_max = (9 - 1) * 64 = 512.
2540          */
2541         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2542         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2543         priv->x_bits = num_x_electrode;
2544         priv->y_bits = num_y_electrode;
2545         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2546         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2547
2548         if (alps_exit_command_mode(psmouse))
2549                 return -1;
2550
2551         return 0;
2552 }
2553
2554 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2555 {
2556         struct ps2dev *ps2dev = &psmouse->ps2dev;
2557         unsigned char param[2];
2558
2559         /* This is dolphin "v1" as empirically defined by florin9doi */
2560         param[0] = 0x64;
2561         param[1] = 0x28;
2562
2563         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2564             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2565             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2566                 return -1;
2567
2568         return 0;
2569 }
2570
2571 static int alps_hw_init_v7(struct psmouse *psmouse)
2572 {
2573         struct ps2dev *ps2dev = &psmouse->ps2dev;
2574         int reg_val, ret = -1;
2575
2576         if (alps_enter_command_mode(psmouse) ||
2577             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2578                 goto error;
2579
2580         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2581                 goto error;
2582
2583         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2584                 goto error;
2585
2586         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2587         if (reg_val == -1)
2588                 goto error;
2589         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2590                 goto error;
2591
2592         alps_exit_command_mode(psmouse);
2593         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2594
2595 error:
2596         alps_exit_command_mode(psmouse);
2597         return ret;
2598 }
2599
2600 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2601 {
2602         struct ps2dev *ps2dev = &psmouse->ps2dev;
2603         char param[2] = {0x64, 0x28};
2604         int ret = -1;
2605
2606         /* enter absolute mode */
2607         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2608             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2609             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2610             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2611                 goto error;
2612         }
2613
2614         /* T.B.D. Decread noise packet number, delete in the future */
2615         if (alps_exit_command_mode(psmouse) ||
2616             alps_enter_command_mode(psmouse) ||
2617             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2618                 goto error;
2619         }
2620         alps_exit_command_mode(psmouse);
2621
2622         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2623
2624 error:
2625         alps_exit_command_mode(psmouse);
2626         return ret;
2627 }
2628
2629 static int alps_set_protocol(struct psmouse *psmouse,
2630                              struct alps_data *priv,
2631                              const struct alps_protocol_info *protocol)
2632 {
2633         psmouse->private = priv;
2634
2635         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2636
2637         priv->proto_version = protocol->version;
2638         priv->byte0 = protocol->byte0;
2639         priv->mask0 = protocol->mask0;
2640         priv->flags = protocol->flags;
2641
2642         priv->x_max = 2000;
2643         priv->y_max = 1400;
2644         priv->x_bits = 15;
2645         priv->y_bits = 11;
2646
2647         switch (priv->proto_version) {
2648         case ALPS_PROTO_V1:
2649         case ALPS_PROTO_V2:
2650                 priv->hw_init = alps_hw_init_v1_v2;
2651                 priv->process_packet = alps_process_packet_v1_v2;
2652                 priv->set_abs_params = alps_set_abs_params_st;
2653                 priv->x_max = 1023;
2654                 priv->y_max = 767;
2655                 if (dmi_check_system(alps_dmi_has_separate_stick_buttons))
2656                         priv->flags |= ALPS_STICK_BITS;
2657                 break;
2658
2659         case ALPS_PROTO_V3:
2660                 priv->hw_init = alps_hw_init_v3;
2661                 priv->process_packet = alps_process_packet_v3;
2662                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2663                 priv->decode_fields = alps_decode_pinnacle;
2664                 priv->nibble_commands = alps_v3_nibble_commands;
2665                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2666
2667                 if (alps_probe_trackstick_v3_v7(psmouse,
2668                                                 ALPS_REG_BASE_PINNACLE) < 0)
2669                         priv->flags &= ~ALPS_DUALPOINT;
2670
2671                 break;
2672
2673         case ALPS_PROTO_V3_RUSHMORE:
2674                 priv->hw_init = alps_hw_init_rushmore_v3;
2675                 priv->process_packet = alps_process_packet_v3;
2676                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2677                 priv->decode_fields = alps_decode_rushmore;
2678                 priv->nibble_commands = alps_v3_nibble_commands;
2679                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2680                 priv->x_bits = 16;
2681                 priv->y_bits = 12;
2682
2683                 if (alps_probe_trackstick_v3_v7(psmouse,
2684                                                 ALPS_REG_BASE_RUSHMORE) < 0)
2685                         priv->flags &= ~ALPS_DUALPOINT;
2686
2687                 break;
2688
2689         case ALPS_PROTO_V4:
2690                 priv->hw_init = alps_hw_init_v4;
2691                 priv->process_packet = alps_process_packet_v4;
2692                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2693                 priv->nibble_commands = alps_v4_nibble_commands;
2694                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2695                 break;
2696
2697         case ALPS_PROTO_V5:
2698                 priv->hw_init = alps_hw_init_dolphin_v1;
2699                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2700                 priv->decode_fields = alps_decode_dolphin;
2701                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2702                 priv->nibble_commands = alps_v3_nibble_commands;
2703                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2704                 priv->x_bits = 23;
2705                 priv->y_bits = 12;
2706
2707                 if (alps_dolphin_get_device_area(psmouse, priv))
2708                         return -EIO;
2709
2710                 break;
2711
2712         case ALPS_PROTO_V6:
2713                 priv->hw_init = alps_hw_init_v6;
2714                 priv->process_packet = alps_process_packet_v6;
2715                 priv->set_abs_params = alps_set_abs_params_st;
2716                 priv->nibble_commands = alps_v6_nibble_commands;
2717                 priv->x_max = 2047;
2718                 priv->y_max = 1535;
2719                 break;
2720
2721         case ALPS_PROTO_V7:
2722                 priv->hw_init = alps_hw_init_v7;
2723                 priv->process_packet = alps_process_packet_v7;
2724                 priv->decode_fields = alps_decode_packet_v7;
2725                 priv->set_abs_params = alps_set_abs_params_v7;
2726                 priv->nibble_commands = alps_v3_nibble_commands;
2727                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2728                 priv->x_max = 0xfff;
2729                 priv->y_max = 0x7ff;
2730
2731                 if (priv->fw_ver[1] != 0xba)
2732                         priv->flags |= ALPS_BUTTONPAD;
2733
2734                 if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
2735                         priv->flags &= ~ALPS_DUALPOINT;
2736
2737                 break;
2738
2739         case ALPS_PROTO_V8:
2740                 priv->hw_init = alps_hw_init_ss4_v2;
2741                 priv->process_packet = alps_process_packet_ss4_v2;
2742                 priv->decode_fields = alps_decode_ss4_v2;
2743                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2744                 priv->nibble_commands = alps_v3_nibble_commands;
2745                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2746
2747                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2748                         return -EIO;
2749
2750                 if (priv->fw_ver[1] == 0x1)
2751                         priv->flags |= ALPS_DUALPOINT |
2752                                         ALPS_DUALPOINT_WITH_PRESSURE;
2753
2754                 break;
2755         }
2756
2757         return 0;
2758 }
2759
2760 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2761                                                          unsigned char *ec)
2762 {
2763         const struct alps_model_info *model;
2764         int i;
2765
2766         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2767                 model = &alps_model_data[i];
2768
2769                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2770                     (!model->command_mode_resp ||
2771                      model->command_mode_resp == ec[2])) {
2772
2773                         return &model->protocol_info;
2774                 }
2775         }
2776
2777         return NULL;
2778 }
2779
2780 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2781 {
2782         const struct alps_protocol_info *protocol;
2783         unsigned char e6[4], e7[4], ec[4];
2784         int error;
2785
2786         /*
2787          * First try "E6 report".
2788          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2789          * The bits 0-2 of the first byte will be 1s if some buttons are
2790          * pressed.
2791          */
2792         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2793                          PSMOUSE_CMD_SETSCALE11, e6))
2794                 return -EIO;
2795
2796         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2797                 return -EINVAL;
2798
2799         /*
2800          * Now get the "E7" and "EC" reports.  These will uniquely identify
2801          * most ALPS touchpads.
2802          */
2803         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2804                          PSMOUSE_CMD_SETSCALE21, e7) ||
2805             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2806                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2807             alps_exit_command_mode(psmouse))
2808                 return -EIO;
2809
2810         protocol = alps_match_table(e7, ec);
2811         if (!protocol) {
2812                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2813                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2814                         protocol = &alps_v5_protocol_data;
2815                 } else if (ec[0] == 0x88 &&
2816                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2817                         protocol = &alps_v7_protocol_data;
2818                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2819                         protocol = &alps_v3_rushmore_data;
2820                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2821                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2822                         protocol = &alps_v3_protocol_data;
2823                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2824                            e7[2] == 0x14 && ec[1] == 0x02) {
2825                         protocol = &alps_v8_protocol_data;
2826                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2827                            e7[2] == 0x28 && ec[1] == 0x01) {
2828                         protocol = &alps_v8_protocol_data;
2829                 } else {
2830                         psmouse_dbg(psmouse,
2831                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2832                         return -EINVAL;
2833                 }
2834         }
2835
2836         if (priv) {
2837                 /* Save the Firmware version */
2838                 memcpy(priv->fw_ver, ec, 3);
2839                 error = alps_set_protocol(psmouse, priv, protocol);
2840                 if (error)
2841                         return error;
2842         }
2843
2844         return 0;
2845 }
2846
2847 static int alps_reconnect(struct psmouse *psmouse)
2848 {
2849         struct alps_data *priv = psmouse->private;
2850
2851         psmouse_reset(psmouse);
2852
2853         if (alps_identify(psmouse, priv) < 0)
2854                 return -1;
2855
2856         return priv->hw_init(psmouse);
2857 }
2858
2859 static void alps_disconnect(struct psmouse *psmouse)
2860 {
2861         struct alps_data *priv = psmouse->private;
2862
2863         psmouse_reset(psmouse);
2864         del_timer_sync(&priv->timer);
2865         if (priv->dev2)
2866                 input_unregister_device(priv->dev2);
2867         if (!IS_ERR_OR_NULL(priv->dev3))
2868                 input_unregister_device(priv->dev3);
2869         kfree(priv);
2870 }
2871
2872 static void alps_set_abs_params_st(struct alps_data *priv,
2873                                    struct input_dev *dev1)
2874 {
2875         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2876         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2877         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2878 }
2879
2880 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2881                                           struct input_dev *dev1)
2882 {
2883         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2884         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2885
2886         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2887         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2888
2889         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2890         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2891 }
2892
2893 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
2894                                         struct input_dev *dev1)
2895 {
2896         alps_set_abs_params_mt_common(priv, dev1);
2897         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2898
2899         input_mt_init_slots(dev1, MAX_TOUCHES,
2900                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2901                                 INPUT_MT_SEMI_MT);
2902 }
2903
2904 static void alps_set_abs_params_v7(struct alps_data *priv,
2905                                    struct input_dev *dev1)
2906 {
2907         alps_set_abs_params_mt_common(priv, dev1);
2908         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2909
2910         input_mt_init_slots(dev1, MAX_TOUCHES,
2911                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2912                                 INPUT_MT_TRACK);
2913
2914         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2915 }
2916
2917 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2918                                        struct input_dev *dev1)
2919 {
2920         alps_set_abs_params_mt_common(priv, dev1);
2921         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2922         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2923
2924         input_mt_init_slots(dev1, MAX_TOUCHES,
2925                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2926                                 INPUT_MT_TRACK);
2927 }
2928
2929 int alps_init(struct psmouse *psmouse)
2930 {
2931         struct alps_data *priv = psmouse->private;
2932         struct input_dev *dev1 = psmouse->dev;
2933         int error;
2934
2935         error = priv->hw_init(psmouse);
2936         if (error)
2937                 goto init_fail;
2938
2939         /*
2940          * Undo part of setup done for us by psmouse core since touchpad
2941          * is not a relative device.
2942          */
2943         __clear_bit(EV_REL, dev1->evbit);
2944         __clear_bit(REL_X, dev1->relbit);
2945         __clear_bit(REL_Y, dev1->relbit);
2946
2947         /*
2948          * Now set up our capabilities.
2949          */
2950         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2951         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2952         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2953         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2954                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2955
2956         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2957
2958         priv->set_abs_params(priv, dev1);
2959
2960         if (priv->flags & ALPS_WHEEL) {
2961                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2962                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2963         }
2964
2965         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2966                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2967                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2968         }
2969
2970         if (priv->flags & ALPS_FOUR_BUTTONS) {
2971                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2972                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2973                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2974                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2975         } else if (priv->flags & ALPS_BUTTONPAD) {
2976                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2977                 clear_bit(BTN_RIGHT, dev1->keybit);
2978         } else {
2979                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2980         }
2981
2982         if (priv->flags & ALPS_DUALPOINT) {
2983                 struct input_dev *dev2;
2984
2985                 dev2 = input_allocate_device();
2986                 if (!dev2) {
2987                         psmouse_err(psmouse,
2988                                     "failed to allocate trackstick device\n");
2989                         error = -ENOMEM;
2990                         goto init_fail;
2991                 }
2992
2993                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2994                          psmouse->ps2dev.serio->phys);
2995                 dev2->phys = priv->phys2;
2996
2997                 /*
2998                  * format of input device name is: "protocol vendor name"
2999                  * see function psmouse_switch_protocol() in psmouse-base.c
3000                  */
3001                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
3002
3003                 dev2->id.bustype = BUS_I8042;
3004                 dev2->id.vendor  = 0x0002;
3005                 dev2->id.product = PSMOUSE_ALPS;
3006                 dev2->id.version = priv->proto_version;
3007                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
3008
3009                 input_set_capability(dev2, EV_REL, REL_X);
3010                 input_set_capability(dev2, EV_REL, REL_Y);
3011                 if (priv->flags & ALPS_DUALPOINT_WITH_PRESSURE) {
3012                         input_set_capability(dev2, EV_ABS, ABS_PRESSURE);
3013                         input_set_abs_params(dev2, ABS_PRESSURE, 0, 127, 0, 0);
3014                 }
3015                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
3016                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
3017                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
3018
3019                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
3020                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
3021
3022                 error = input_register_device(dev2);
3023                 if (error) {
3024                         psmouse_err(psmouse,
3025                                     "failed to register trackstick device: %d\n",
3026                                     error);
3027                         input_free_device(dev2);
3028                         goto init_fail;
3029                 }
3030
3031                 priv->dev2 = dev2;
3032         }
3033
3034         priv->psmouse = psmouse;
3035
3036         INIT_DELAYED_WORK(&priv->dev3_register_work,
3037                           alps_register_bare_ps2_mouse);
3038
3039         psmouse->protocol_handler = alps_process_byte;
3040         psmouse->poll = alps_poll;
3041         psmouse->disconnect = alps_disconnect;
3042         psmouse->reconnect = alps_reconnect;
3043         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
3044
3045         /* We are having trouble resyncing ALPS touchpads so disable it for now */
3046         psmouse->resync_time = 0;
3047
3048         /* Allow 2 invalid packets without resetting device */
3049         psmouse->resetafter = psmouse->pktsize * 2;
3050
3051         return 0;
3052
3053 init_fail:
3054         psmouse_reset(psmouse);
3055         /*
3056          * Even though we did not allocate psmouse->private we do free
3057          * it here.
3058          */
3059         kfree(psmouse->private);
3060         psmouse->private = NULL;
3061         return error;
3062 }
3063
3064 int alps_detect(struct psmouse *psmouse, bool set_properties)
3065 {
3066         struct alps_data *priv;
3067         int error;
3068
3069         error = alps_identify(psmouse, NULL);
3070         if (error)
3071                 return error;
3072
3073         /*
3074          * Reset the device to make sure it is fully operational:
3075          * on some laptops, like certain Dell Latitudes, we may
3076          * fail to properly detect presence of trackstick if device
3077          * has not been reset.
3078          */
3079         psmouse_reset(psmouse);
3080
3081         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
3082         if (!priv)
3083                 return -ENOMEM;
3084
3085         error = alps_identify(psmouse, priv);
3086         if (error) {
3087                 kfree(priv);
3088                 return error;
3089         }
3090
3091         if (set_properties) {
3092                 psmouse->vendor = "ALPS";
3093                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
3094                                 "DualPoint TouchPad" : "GlidePoint";
3095                 psmouse->model = priv->proto_version;
3096         } else {
3097                 /*
3098                  * Destroy alps_data structure we allocated earlier since
3099                  * this was just a "trial run". Otherwise we'll keep it
3100                  * to be used by alps_init() which has to be called if
3101                  * we succeed and set_properties is true.
3102                  */
3103                 kfree(priv);
3104                 psmouse->private = NULL;
3105         }
3106
3107         return 0;
3108 }
3109