drivers/input/joystick/adi.c

   1 /*
   2  *  Copyright (c) 1998-2005 Vojtech Pavlik
   3  */
   4
   5 /*
   6  * Logitech ADI joystick family driver for Linux
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  * Should you need to contact me, the author, you can do so either by
  25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  27  */
  28
  29 #include <linux/delay.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/string.h>
  33 #include <linux/slab.h>
  34 #include <linux/input.h>
  35 #include <linux/gameport.h>
  36 #include <linux/init.h>
  37
  38 #define DRIVER_DESC     "Logitech ADI joystick family driver"
  39
  40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  41 MODULE_DESCRIPTION(DRIVER_DESC);
  42 MODULE_LICENSE("GPL");
  43
  44 /*
  45  * Times, array sizes, flags, ids.
  46  */
  47
  48 #define ADI_MAX_START           200     /* Trigger to packet timeout [200us] */
  49 #define ADI_MAX_STROBE          40      /* Single bit timeout [40us] */
  50 #define ADI_INIT_DELAY          10      /* Delay after init packet [10ms] */
  51 #define ADI_DATA_DELAY          4       /* Delay after data packet [4ms] */
  52
  53 #define ADI_MAX_LENGTH          256
  54 #define ADI_MIN_LENGTH          8
  55 #define ADI_MIN_LEN_LENGTH      10
  56 #define ADI_MIN_ID_LENGTH       66
  57 #define ADI_MAX_NAME_LENGTH     48
  58 #define ADI_MAX_CNAME_LENGTH    16
  59 #define ADI_MAX_PHYS_LENGTH     64
  60
  61 #define ADI_FLAG_HAT            0x04
  62 #define ADI_FLAG_10BIT          0x08
  63
  64 #define ADI_ID_TPD              0x01
  65 #define ADI_ID_WGP              0x06
  66 #define ADI_ID_WGPE             0x08
  67 #define ADI_ID_MAX              0x0a
  68
  69 /*
  70  * Names, buttons, axes ...
  71  */
  72
  73 static char *adi_names[] = {    "WingMan Extreme Digital", "ThunderPad Digital", "SideCar", "CyberMan 2",
  74                                 "WingMan Interceptor", "WingMan Formula", "WingMan GamePad",
  75                                 "WingMan Extreme Digital 3D", "WingMan GamePad Extreme",
  76                                 "WingMan GamePad USB", "Unknown Device %#x" };
  77
  78 static char adi_wmgpe_abs[] =   { ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y };
  79 static char adi_wmi_abs[] =     { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
  80 static char adi_wmed3d_abs[] =  { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RZ, ABS_HAT0X, ABS_HAT0Y };
  81 static char adi_cm2_abs[] =     { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
  82 static char adi_wmf_abs[] =     { ABS_WHEEL, ABS_GAS, ABS_BRAKE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
  83
  84 static short adi_wmgpe_key[] =  { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,  BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT };
  85 static short adi_wmi_key[] =    { BTN_TRIGGER,  BTN_TOP, BTN_THUMB, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_EXTRA };
  86 static short adi_wmed3d_key[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2 };
  87 static short adi_cm2_key[] =    { BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };
  88
  89 static char* adi_abs[] = { adi_wmi_abs, adi_wmgpe_abs, adi_wmf_abs, adi_cm2_abs, adi_wmi_abs, adi_wmf_abs,
  90                            adi_wmgpe_abs, adi_wmed3d_abs, adi_wmgpe_abs, adi_wmgpe_abs, adi_wmi_abs };
  91
  92 static short* adi_key[] = { adi_wmi_key, adi_wmgpe_key, adi_cm2_key, adi_cm2_key, adi_wmi_key, adi_cm2_key,
  93                             adi_wmgpe_key, adi_wmed3d_key, adi_wmgpe_key, adi_wmgpe_key, adi_wmi_key };
  94
  95 /*
  96  * Hat to axis conversion arrays.
  97  */
  98
  99 static struct {
 100         int x;
 101         int y;
 102 } adi_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
 103
 104 /*
 105  * Per-port information.
 106  */
 107
 108 struct adi {
 109         struct input_dev dev;
 110         int length;
 111         int ret;
 112         int idx;
 113         unsigned char id;
 114         char buttons;
 115         char axes10;
 116         char axes8;
 117         signed char pad;
 118         char hats;
 119         char *abs;
 120         short *key;
 121         char name[ADI_MAX_NAME_LENGTH];
 122         char cname[ADI_MAX_CNAME_LENGTH];
 123         char phys[ADI_MAX_PHYS_LENGTH];
 124         unsigned char data[ADI_MAX_LENGTH];
 125 };
 126
 127 struct adi_port {
 128         struct gameport *gameport;
 129         struct adi adi[2];
 130         int bad;
 131         int reads;
 132 };
 133
 134 /*
 135  * adi_read_packet() reads a Logitech ADI packet.
 136  */
 137
 138 static void adi_read_packet(struct adi_port *port)
 139 {
 140         struct adi *adi = port->adi;
 141         struct gameport *gameport = port->gameport;
 142         unsigned char u, v, w, x, z;
 143         int t[2], s[2], i;
 144         unsigned long flags;
 145
 146         for (i = 0; i < 2; i++) {
 147                 adi[i].ret = -1;
 148                 t[i] = gameport_time(gameport, ADI_MAX_START);
 149                 s[i] = 0;
 150         }
 151
 152         local_irq_save(flags);
 153
 154         gameport_trigger(gameport);
 155         v = z = gameport_read(gameport);
 156
 157         do {
 158                 u = v;
 159                 w = u ^ (v = x = gameport_read(gameport));
 160                 for (i = 0; i < 2; i++, w >>= 2, x >>= 2) {
 161                         t[i]--;
 162                         if ((w & 0x30) && s[i]) {
 163                                 if ((w & 0x30) < 0x30 && adi[i].ret < ADI_MAX_LENGTH && t[i] > 0) {
 164                                         adi[i].data[++adi[i].ret] = w;
 165                                         t[i] = gameport_time(gameport, ADI_MAX_STROBE);
 166                                 } else t[i] = 0;
 167                         } else if (!(x & 0x30)) s[i] = 1;
 168                 }
 169         } while (t[0] > 0 || t[1] > 0);
 170
 171         local_irq_restore(flags);
 172
 173         return;
 174 }
 175
 176 /*
 177  * adi_move_bits() detects a possible 2-stream mode, and moves
 178  * the bits accordingly.
 179  */
 180
 181 static void adi_move_bits(struct adi_port *port, int length)
 182 {
 183         int i;
 184         struct adi *adi = port->adi;
 185
 186         adi[0].idx = adi[1].idx = 0;
 187
 188         if (adi[0].ret <= 0 || adi[1].ret <= 0) return;
 189         if (adi[0].data[0] & 0x20 || ~adi[1].data[0] & 0x20) return;
 190
 191         for (i = 1; i <= adi[1].ret; i++)
 192                 adi[0].data[((length - 1) >> 1) + i + 1] = adi[1].data[i];
 193
 194         adi[0].ret += adi[1].ret;
 195         adi[1].ret = -1;
 196 }
 197
 198 /*
 199  * adi_get_bits() gathers bits from the data packet.
 200  */
 201
 202 static inline int adi_get_bits(struct adi *adi, int count)
 203 {
 204         int bits = 0;
 205         int i;
 206         if ((adi->idx += count) > adi->ret) return 0;
 207         for (i = 0; i < count; i++)
 208                 bits |= ((adi->data[adi->idx - i] >> 5) & 1) << i;
 209         return bits;
 210 }
 211
 212 /*
 213  * adi_decode() decodes Logitech joystick data into input events.
 214  */
 215
 216 static int adi_decode(struct adi *adi)
 217 {
 218         struct input_dev *dev = &adi->dev;
 219         char *abs = adi->abs;
 220         short *key = adi->key;
 221         int i, t;
 222
 223         if (adi->ret < adi->length || adi->id != (adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4)))
 224                 return -1;
 225
 226         for (i = 0; i < adi->axes10; i++)
 227                 input_report_abs(dev, *abs++, adi_get_bits(adi, 10));
 228
 229         for (i = 0; i < adi->axes8; i++)
 230                 input_report_abs(dev, *abs++, adi_get_bits(adi, 8));
 231
 232         for (i = 0; i < adi->buttons && i < 63; i++) {
 233                 if (i == adi->pad) {
 234                         t = adi_get_bits(adi, 4);
 235                         input_report_abs(dev, *abs++, ((t >> 2) & 1) - ( t       & 1));
 236                         input_report_abs(dev, *abs++, ((t >> 1) & 1) - ((t >> 3) & 1));
 237                 }
 238                 input_report_key(dev, *key++, adi_get_bits(adi, 1));
 239         }
 240
 241         for (i = 0; i < adi->hats; i++) {
 242                 if ((t = adi_get_bits(adi, 4)) > 8) t = 0;
 243                 input_report_abs(dev, *abs++, adi_hat_to_axis[t].x);
 244                 input_report_abs(dev, *abs++, adi_hat_to_axis[t].y);
 245         }
 246
 247         for (i = 63; i < adi->buttons; i++)
 248                 input_report_key(dev, *key++, adi_get_bits(adi, 1));
 249
 250         input_sync(dev);
 251
 252         return 0;
 253 }
 254
 255 /*
 256  * adi_read() reads the data packet and decodes it.
 257  */
 258
 259 static int adi_read(struct adi_port *port)
 260 {
 261         int i;
 262         int result = 0;
 263
 264         adi_read_packet(port);
 265         adi_move_bits(port, port->adi[0].length);
 266
 267         for (i = 0; i < 2; i++)
 268                 if (port->adi[i].length)
 269                          result |= adi_decode(port->adi + i);
 270
 271         return result;
 272 }
 273
 274 /*
 275  * adi_poll() repeatedly polls the Logitech joysticks.
 276  */
 277
 278 static void adi_poll(struct gameport *gameport)
 279 {
 280         struct adi_port *port = gameport_get_drvdata(gameport);
 281
 282         port->bad -= adi_read(port);
 283         port->reads++;
 284 }
 285
 286 /*
 287  * adi_open() is a callback from the input open routine.
 288  */
 289
 290 static int adi_open(struct input_dev *dev)
 291 {
 292         struct adi_port *port = dev->private;
 293
 294         gameport_start_polling(port->gameport);
 295         return 0;
 296 }
 297
 298 /*
 299  * adi_close() is a callback from the input close routine.
 300  */
 301
 302 static void adi_close(struct input_dev *dev)
 303 {
 304         struct adi_port *port = dev->private;
 305
 306         gameport_stop_polling(port->gameport);
 307 }
 308
 309 /*
 310  * adi_init_digital() sends a trigger & delay sequence
 311  * to reset and initialize a Logitech joystick into digital mode.
 312  */
 313
 314 static void adi_init_digital(struct gameport *gameport)
 315 {
 316         int seq[] = { 4, -2, -3, 10, -6, -11, -7, -9, 11, 0 };
 317         int i;
 318
 319         for (i = 0; seq[i]; i++) {
 320                 gameport_trigger(gameport);
 321                 if (seq[i] > 0) msleep(seq[i]);
 322                 if (seq[i] < 0) {
 323                         mdelay(-seq[i]);
 324                         udelay(-seq[i]*14);     /* It looks like mdelay() is off by approx 1.4% */
 325                 }
 326         }
 327 }
 328
 329 static void adi_id_decode(struct adi *adi, struct adi_port *port)
 330 {
 331         int i, t;
 332
 333         if (adi->ret < ADI_MIN_ID_LENGTH) /* Minimum ID packet length */
 334                 return;
 335
 336         if (adi->ret < (t = adi_get_bits(adi, 10))) {
 337                 printk(KERN_WARNING "adi: Short ID packet: reported: %d != read: %d\n", t, adi->ret);
 338                 return;
 339         }
 340
 341         adi->id = adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4);
 342
 343         if ((t = adi_get_bits(adi, 4)) & ADI_FLAG_HAT) adi->hats++;
 344
 345         adi->length = adi_get_bits(adi, 10);
 346
 347         if (adi->length >= ADI_MAX_LENGTH || adi->length < ADI_MIN_LENGTH) {
 348                 printk(KERN_WARNING "adi: Bad data packet length (%d).\n", adi->length);
 349                 adi->length = 0;
 350                 return;
 351         }
 352
 353         adi->axes8 = adi_get_bits(adi, 4);
 354         adi->buttons = adi_get_bits(adi, 6);
 355
 356         if (adi_get_bits(adi, 6) != 8 && adi->hats) {
 357                 printk(KERN_WARNING "adi: Other than 8-dir POVs not supported yet.\n");
 358                 adi->length = 0;
 359                 return;
 360         }
 361
 362         adi->buttons += adi_get_bits(adi, 6);
 363         adi->hats += adi_get_bits(adi, 4);
 364
 365         i = adi_get_bits(adi, 4);
 366
 367         if (t & ADI_FLAG_10BIT) {
 368                 adi->axes10 = adi->axes8 - i;
 369                 adi->axes8 = i;
 370         }
 371
 372         t = adi_get_bits(adi, 4);
 373
 374         for (i = 0; i < t; i++)
 375                 adi->cname[i] = adi_get_bits(adi, 8);
 376         adi->cname[i] = 0;
 377
 378         t = 8 + adi->buttons + adi->axes10 * 10 + adi->axes8 * 8 + adi->hats * 4;
 379         if (adi->length != t && adi->length != t + (t & 1)) {
 380                 printk(KERN_WARNING "adi: Expected length %d != data length %d\n", t, adi->length);
 381                 adi->length = 0;
 382                 return;
 383         }
 384
 385         switch (adi->id) {
 386                 case ADI_ID_TPD:
 387                         adi->pad = 4;
 388                         adi->buttons -= 4;
 389                         break;
 390                 case ADI_ID_WGP:
 391                         adi->pad = 0;
 392                         adi->buttons -= 4;
 393                         break;
 394                 default:
 395                         adi->pad = -1;
 396                         break;
 397         }
 398 }
 399
 400 static void adi_init_input(struct adi *adi, struct adi_port *port, int half)
 401 {
 402         int i, t;
 403         char buf[ADI_MAX_NAME_LENGTH];
 404
 405         if (!adi->length) return;
 406
 407         init_input_dev(&adi->dev);
 408
 409         t = adi->id < ADI_ID_MAX ? adi->id : ADI_ID_MAX;
 410
 411         snprintf(buf, ADI_MAX_PHYS_LENGTH, adi_names[t], adi->id);
 412         snprintf(adi->name, ADI_MAX_NAME_LENGTH, "Logitech %s", buf);
 413         snprintf(adi->phys, ADI_MAX_PHYS_LENGTH, "%s/input%d", port->gameport->phys, half);
 414
 415         adi->abs = adi_abs[t];
 416         adi->key = adi_key[t];
 417
 418         adi->dev.open = adi_open;
 419         adi->dev.close = adi_close;
 420
 421         adi->dev.name = adi->name;
 422         adi->dev.phys = adi->phys;
 423         adi->dev.id.bustype = BUS_GAMEPORT;
 424         adi->dev.id.vendor = GAMEPORT_ID_VENDOR_LOGITECH;
 425         adi->dev.id.product = adi->id;
 426         adi->dev.id.version = 0x0100;
 427
 428         adi->dev.private = port;
 429         adi->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 430
 431         for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++)
 432                 set_bit(adi->abs[i], adi->dev.absbit);
 433
 434         for (i = 0; i < adi->buttons; i++)
 435                 set_bit(adi->key[i], adi->dev.keybit);
 436 }
 437
 438 static void adi_init_center(struct adi *adi)
 439 {
 440         int i, t, x;
 441
 442         if (!adi->length)
 443                 return;
 444
 445         for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++) {
 446
 447                 t = adi->abs[i];
 448                 x = adi->dev.abs[t];
 449
 450                 if (t == ABS_THROTTLE || t == ABS_RUDDER || adi->id == ADI_ID_WGPE)
 451                         x = i < adi->axes10 ? 512 : 128;
 452
 453                 if (i < adi->axes10)
 454                         input_set_abs_params(&adi->dev, t, 64, x * 2 - 64, 2, 16);
 455                 else if (i < adi->axes10 + adi->axes8)
 456                         input_set_abs_params(&adi->dev, t, 48, x * 2 - 48, 1, 16);
 457                 else
 458                         input_set_abs_params(&adi->dev, t, -1, 1, 0, 0);
 459         }
 460 }
 461
 462 /*
 463  * adi_connect() probes for Logitech ADI joysticks.
 464  */
 465
 466 static int adi_connect(struct gameport *gameport, struct gameport_driver *drv)
 467 {
 468         struct adi_port *port;
 469         int i;
 470         int err;
 471
 472         if (!(port = kcalloc(1, sizeof(struct adi_port), GFP_KERNEL)))
 473                 return -ENOMEM;
 474
 475         port->gameport = gameport;
 476
 477         gameport_set_drvdata(gameport, port);
 478
 479         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 480         if (err) {
 481                 kfree(port);
 482                 return err;
 483         }
 484
 485         adi_init_digital(gameport);
 486         adi_read_packet(port);
 487
 488         if (port->adi[0].ret >= ADI_MIN_LEN_LENGTH)
 489                 adi_move_bits(port, adi_get_bits(port->adi, 10));
 490
 491         for (i = 0; i < 2; i++) {
 492                 adi_id_decode(port->adi + i, port);
 493                 adi_init_input(port->adi + i, port, i);
 494         }
 495
 496         if (!port->adi[0].length && !port->adi[1].length) {
 497                 gameport_close(gameport);
 498                 kfree(port);
 499                 return -ENODEV;
 500         }
 501
 502         gameport_set_poll_handler(gameport, adi_poll);
 503         gameport_set_poll_interval(gameport, 20);
 504
 505         msleep(ADI_INIT_DELAY);
 506         if (adi_read(port)) {
 507                 msleep(ADI_DATA_DELAY);
 508                 adi_read(port);
 509         }
 510
 511         for (i = 0; i < 2; i++)
 512                 if (port->adi[i].length > 0) {
 513                         adi_init_center(port->adi + i);
 514                         input_register_device(&port->adi[i].dev);
 515                         printk(KERN_INFO "input: %s [%s] on %s\n",
 516                                 port->adi[i].name, port->adi[i].cname, gameport->phys);
 517                 }
 518
 519         return 0;
 520 }
 521
 522 static void adi_disconnect(struct gameport *gameport)
 523 {
 524         int i;
 525         struct adi_port *port = gameport_get_drvdata(gameport);
 526
 527         for (i = 0; i < 2; i++)
 528                 if (port->adi[i].length > 0)
 529                         input_unregister_device(&port->adi[i].dev);
 530         gameport_close(gameport);
 531         gameport_set_drvdata(gameport, NULL);
 532         kfree(port);
 533 }
 534
 535 /*
 536  * The gameport device structure.
 537  */
 538
 539 static struct gameport_driver adi_drv = {
 540         .driver         = {
 541                 .name   = "adi",
 542         },
 543         .description    = DRIVER_DESC,
 544         .connect        = adi_connect,
 545         .disconnect     = adi_disconnect,
 546 };
 547
 548 static int __init adi_init(void)
 549 {
 550         gameport_register_driver(&adi_drv);
 551         return 0;
 552 }
 553
 554 static void __exit adi_exit(void)
 555 {
 556         gameport_unregister_driver(&adi_drv);
 557 }
 558
 559 module_init(adi_init);
 560 module_exit(adi_exit);