drivers/input/joystick/adi.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 1998-2005 Vojtech Pavlik
   4  */
   5
   6 /*
   7  * Logitech ADI joystick family driver for Linux
   8  */
   9
  10 /*
  11  */
  12
  13 #include <linux/delay.h>
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/string.h>
  17 #include <linux/slab.h>
  18 #include <linux/input.h>
  19 #include <linux/gameport.h>
  20 #include <linux/jiffies.h>
  21
  22 #define DRIVER_DESC     "Logitech ADI joystick family driver"
  23
  24 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  25 MODULE_DESCRIPTION(DRIVER_DESC);
  26 MODULE_LICENSE("GPL");
  27
  28 /*
  29  * Times, array sizes, flags, ids.
  30  */
  31
  32 #define ADI_MAX_START           200     /* Trigger to packet timeout [200us] */
  33 #define ADI_MAX_STROBE          40      /* Single bit timeout [40us] */
  34 #define ADI_INIT_DELAY          10      /* Delay after init packet [10ms] */
  35 #define ADI_DATA_DELAY          4       /* Delay after data packet [4ms] */
  36
  37 #define ADI_MAX_LENGTH          256
  38 #define ADI_MIN_LENGTH          8
  39 #define ADI_MIN_LEN_LENGTH      10
  40 #define ADI_MIN_ID_LENGTH       66
  41 #define ADI_MAX_NAME_LENGTH     64
  42 #define ADI_MAX_CNAME_LENGTH    16
  43 #define ADI_MAX_PHYS_LENGTH     64
  44
  45 #define ADI_FLAG_HAT            0x04
  46 #define ADI_FLAG_10BIT          0x08
  47
  48 #define ADI_ID_TPD              0x01
  49 #define ADI_ID_WGP              0x06
  50 #define ADI_ID_WGPE             0x08
  51 #define ADI_ID_MAX              0x0a
  52
  53 /*
  54  * Names, buttons, axes ...
  55  */
  56
  57 static char *adi_names[] = {    "WingMan Extreme Digital", "ThunderPad Digital", "SideCar", "CyberMan 2",
  58                                 "WingMan Interceptor", "WingMan Formula", "WingMan GamePad",
  59                                 "WingMan Extreme Digital 3D", "WingMan GamePad Extreme",
  60                                 "WingMan GamePad USB", "Unknown Device %#x" };
  61
  62 static char adi_wmgpe_abs[] =   { ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y };
  63 static char adi_wmi_abs[] =     { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
  64 static char adi_wmed3d_abs[] =  { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RZ, ABS_HAT0X, ABS_HAT0Y };
  65 static char adi_cm2_abs[] =     { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
  66 static char adi_wmf_abs[] =     { ABS_WHEEL, ABS_GAS, ABS_BRAKE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
  67
  68 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 };
  69 static short adi_wmi_key[] =    { BTN_TRIGGER,  BTN_TOP, BTN_THUMB, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_EXTRA };
  70 static short adi_wmed3d_key[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2 };
  71 static short adi_cm2_key[] =    { BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };
  72
  73 static char* adi_abs[] = { adi_wmi_abs, adi_wmgpe_abs, adi_wmf_abs, adi_cm2_abs, adi_wmi_abs, adi_wmf_abs,
  74                            adi_wmgpe_abs, adi_wmed3d_abs, adi_wmgpe_abs, adi_wmgpe_abs, adi_wmi_abs };
  75
  76 static short* adi_key[] = { adi_wmi_key, adi_wmgpe_key, adi_cm2_key, adi_cm2_key, adi_wmi_key, adi_cm2_key,
  77                             adi_wmgpe_key, adi_wmed3d_key, adi_wmgpe_key, adi_wmgpe_key, adi_wmi_key };
  78
  79 /*
  80  * Hat to axis conversion arrays.
  81  */
  82
  83 static struct {
  84         int x;
  85         int y;
  86 } adi_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  87
  88 /*
  89  * Per-port information.
  90  */
  91
  92 struct adi {
  93         struct input_dev *dev;
  94         int length;
  95         int ret;
  96         int idx;
  97         unsigned char id;
  98         char buttons;
  99         char axes10;
 100         char axes8;
 101         signed char pad;
 102         char hats;
 103         char *abs;
 104         short *key;
 105         char name[ADI_MAX_NAME_LENGTH];
 106         char cname[ADI_MAX_CNAME_LENGTH];
 107         char phys[ADI_MAX_PHYS_LENGTH];
 108         unsigned char data[ADI_MAX_LENGTH];
 109 };
 110
 111 struct adi_port {
 112         struct gameport *gameport;
 113         struct adi adi[2];
 114         int bad;
 115         int reads;
 116 };
 117
 118 /*
 119  * adi_read_packet() reads a Logitech ADI packet.
 120  */
 121
 122 static void adi_read_packet(struct adi_port *port)
 123 {
 124         struct adi *adi = port->adi;
 125         struct gameport *gameport = port->gameport;
 126         unsigned char u, v, w, x, z;
 127         int t[2], s[2], i;
 128         unsigned long flags;
 129
 130         for (i = 0; i < 2; i++) {
 131                 adi[i].ret = -1;
 132                 t[i] = gameport_time(gameport, ADI_MAX_START);
 133                 s[i] = 0;
 134         }
 135
 136         local_irq_save(flags);
 137
 138         gameport_trigger(gameport);
 139         v = z = gameport_read(gameport);
 140
 141         do {
 142                 u = v;
 143                 w = u ^ (v = x = gameport_read(gameport));
 144                 for (i = 0; i < 2; i++, w >>= 2, x >>= 2) {
 145                         t[i]--;
 146                         if ((w & 0x30) && s[i]) {
 147                                 if ((w & 0x30) < 0x30 && adi[i].ret < ADI_MAX_LENGTH && t[i] > 0) {
 148                                         adi[i].data[++adi[i].ret] = w;
 149                                         t[i] = gameport_time(gameport, ADI_MAX_STROBE);
 150                                 } else t[i] = 0;
 151                         } else if (!(x & 0x30)) s[i] = 1;
 152                 }
 153         } while (t[0] > 0 || t[1] > 0);
 154
 155         local_irq_restore(flags);
 156
 157         return;
 158 }
 159
 160 /*
 161  * adi_move_bits() detects a possible 2-stream mode, and moves
 162  * the bits accordingly.
 163  */
 164
 165 static void adi_move_bits(struct adi_port *port, int length)
 166 {
 167         int i;
 168         struct adi *adi = port->adi;
 169
 170         adi[0].idx = adi[1].idx = 0;
 171
 172         if (adi[0].ret <= 0 || adi[1].ret <= 0) return;
 173         if (adi[0].data[0] & 0x20 || ~adi[1].data[0] & 0x20) return;
 174
 175         for (i = 1; i <= adi[1].ret; i++)
 176                 adi[0].data[((length - 1) >> 1) + i + 1] = adi[1].data[i];
 177
 178         adi[0].ret += adi[1].ret;
 179         adi[1].ret = -1;
 180 }
 181
 182 /*
 183  * adi_get_bits() gathers bits from the data packet.
 184  */
 185
 186 static inline int adi_get_bits(struct adi *adi, int count)
 187 {
 188         int bits = 0;
 189         int i;
 190         if ((adi->idx += count) > adi->ret) return 0;
 191         for (i = 0; i < count; i++)
 192                 bits |= ((adi->data[adi->idx - i] >> 5) & 1) << i;
 193         return bits;
 194 }
 195
 196 /*
 197  * adi_decode() decodes Logitech joystick data into input events.
 198  */
 199
 200 static int adi_decode(struct adi *adi)
 201 {
 202         struct input_dev *dev = adi->dev;
 203         char *abs = adi->abs;
 204         short *key = adi->key;
 205         int i, t;
 206
 207         if (adi->ret < adi->length || adi->id != (adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4)))
 208                 return -1;
 209
 210         for (i = 0; i < adi->axes10; i++)
 211                 input_report_abs(dev, *abs++, adi_get_bits(adi, 10));
 212
 213         for (i = 0; i < adi->axes8; i++)
 214                 input_report_abs(dev, *abs++, adi_get_bits(adi, 8));
 215
 216         for (i = 0; i < adi->buttons && i < 63; i++) {
 217                 if (i == adi->pad) {
 218                         t = adi_get_bits(adi, 4);
 219                         input_report_abs(dev, *abs++, ((t >> 2) & 1) - ( t       & 1));
 220                         input_report_abs(dev, *abs++, ((t >> 1) & 1) - ((t >> 3) & 1));
 221                 }
 222                 input_report_key(dev, *key++, adi_get_bits(adi, 1));
 223         }
 224
 225         for (i = 0; i < adi->hats; i++) {
 226                 if ((t = adi_get_bits(adi, 4)) > 8) t = 0;
 227                 input_report_abs(dev, *abs++, adi_hat_to_axis[t].x);
 228                 input_report_abs(dev, *abs++, adi_hat_to_axis[t].y);
 229         }
 230
 231         for (i = 63; i < adi->buttons; i++)
 232                 input_report_key(dev, *key++, adi_get_bits(adi, 1));
 233
 234         input_sync(dev);
 235
 236         return 0;
 237 }
 238
 239 /*
 240  * adi_read() reads the data packet and decodes it.
 241  */
 242
 243 static int adi_read(struct adi_port *port)
 244 {
 245         int i;
 246         int result = 0;
 247
 248         adi_read_packet(port);
 249         adi_move_bits(port, port->adi[0].length);
 250
 251         for (i = 0; i < 2; i++)
 252                 if (port->adi[i].length)
 253                          result |= adi_decode(port->adi + i);
 254
 255         return result;
 256 }
 257
 258 /*
 259  * adi_poll() repeatedly polls the Logitech joysticks.
 260  */
 261
 262 static void adi_poll(struct gameport *gameport)
 263 {
 264         struct adi_port *port = gameport_get_drvdata(gameport);
 265
 266         port->bad -= adi_read(port);
 267         port->reads++;
 268 }
 269
 270 /*
 271  * adi_open() is a callback from the input open routine.
 272  */
 273
 274 static int adi_open(struct input_dev *dev)
 275 {
 276         struct adi_port *port = input_get_drvdata(dev);
 277
 278         gameport_start_polling(port->gameport);
 279         return 0;
 280 }
 281
 282 /*
 283  * adi_close() is a callback from the input close routine.
 284  */
 285
 286 static void adi_close(struct input_dev *dev)
 287 {
 288         struct adi_port *port = input_get_drvdata(dev);
 289
 290         gameport_stop_polling(port->gameport);
 291 }
 292
 293 /*
 294  * adi_init_digital() sends a trigger & delay sequence
 295  * to reset and initialize a Logitech joystick into digital mode.
 296  */
 297
 298 static void adi_init_digital(struct gameport *gameport)
 299 {
 300         static const int seq[] = { 4, -2, -3, 10, -6, -11, -7, -9, 11, 0 };
 301         int i;
 302
 303         for (i = 0; seq[i]; i++) {
 304                 gameport_trigger(gameport);
 305                 if (seq[i] > 0)
 306                         msleep(seq[i]);
 307                 if (seq[i] < 0) {
 308                         mdelay(-seq[i]);
 309                         udelay(-seq[i]*14);     /* It looks like mdelay() is off by approx 1.4% */
 310                 }
 311         }
 312 }
 313
 314 static void adi_id_decode(struct adi *adi, struct adi_port *port)
 315 {
 316         int i, t;
 317
 318         if (adi->ret < ADI_MIN_ID_LENGTH) /* Minimum ID packet length */
 319                 return;
 320
 321         if (adi->ret < (t = adi_get_bits(adi, 10))) {
 322                 printk(KERN_WARNING "adi: Short ID packet: reported: %d != read: %d\n", t, adi->ret);
 323                 return;
 324         }
 325
 326         adi->id = adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4);
 327
 328         if ((t = adi_get_bits(adi, 4)) & ADI_FLAG_HAT) adi->hats++;
 329
 330         adi->length = adi_get_bits(adi, 10);
 331
 332         if (adi->length >= ADI_MAX_LENGTH || adi->length < ADI_MIN_LENGTH) {
 333                 printk(KERN_WARNING "adi: Bad data packet length (%d).\n", adi->length);
 334                 adi->length = 0;
 335                 return;
 336         }
 337
 338         adi->axes8 = adi_get_bits(adi, 4);
 339         adi->buttons = adi_get_bits(adi, 6);
 340
 341         if (adi_get_bits(adi, 6) != 8 && adi->hats) {
 342                 printk(KERN_WARNING "adi: Other than 8-dir POVs not supported yet.\n");
 343                 adi->length = 0;
 344                 return;
 345         }
 346
 347         adi->buttons += adi_get_bits(adi, 6);
 348         adi->hats += adi_get_bits(adi, 4);
 349
 350         i = adi_get_bits(adi, 4);
 351
 352         if (t & ADI_FLAG_10BIT) {
 353                 adi->axes10 = adi->axes8 - i;
 354                 adi->axes8 = i;
 355         }
 356
 357         t = adi_get_bits(adi, 4);
 358
 359         for (i = 0; i < t; i++)
 360                 adi->cname[i] = adi_get_bits(adi, 8);
 361         adi->cname[i] = 0;
 362
 363         t = 8 + adi->buttons + adi->axes10 * 10 + adi->axes8 * 8 + adi->hats * 4;
 364         if (adi->length != t && adi->length != t + (t & 1)) {
 365                 printk(KERN_WARNING "adi: Expected length %d != data length %d\n", t, adi->length);
 366                 adi->length = 0;
 367                 return;
 368         }
 369
 370         switch (adi->id) {
 371                 case ADI_ID_TPD:
 372                         adi->pad = 4;
 373                         adi->buttons -= 4;
 374                         break;
 375                 case ADI_ID_WGP:
 376                         adi->pad = 0;
 377                         adi->buttons -= 4;
 378                         break;
 379                 default:
 380                         adi->pad = -1;
 381                         break;
 382         }
 383 }
 384
 385 static int adi_init_input(struct adi *adi, struct adi_port *port, int half)
 386 {
 387         struct input_dev *input_dev;
 388         char buf[ADI_MAX_NAME_LENGTH];
 389         int i, t;
 390
 391         adi->dev = input_dev = input_allocate_device();
 392         if (!input_dev)
 393                 return -ENOMEM;
 394
 395         t = adi->id < ADI_ID_MAX ? adi->id : ADI_ID_MAX;
 396
 397         snprintf(buf, ADI_MAX_PHYS_LENGTH, adi_names[t], adi->id);
 398         snprintf(adi->name, ADI_MAX_NAME_LENGTH, "Logitech %s [%s]", buf, adi->cname);
 399         snprintf(adi->phys, ADI_MAX_PHYS_LENGTH, "%s/input%d", port->gameport->phys, half);
 400
 401         adi->abs = adi_abs[t];
 402         adi->key = adi_key[t];
 403
 404         input_dev->name = adi->name;
 405         input_dev->phys = adi->phys;
 406         input_dev->id.bustype = BUS_GAMEPORT;
 407         input_dev->id.vendor = GAMEPORT_ID_VENDOR_LOGITECH;
 408         input_dev->id.product = adi->id;
 409         input_dev->id.version = 0x0100;
 410         input_dev->dev.parent = &port->gameport->dev;
 411
 412         input_set_drvdata(input_dev, port);
 413
 414         input_dev->open = adi_open;
 415         input_dev->close = adi_close;
 416
 417         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 418
 419         for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++)
 420                 set_bit(adi->abs[i], input_dev->absbit);
 421
 422         for (i = 0; i < adi->buttons; i++)
 423                 set_bit(adi->key[i], input_dev->keybit);
 424
 425         return 0;
 426 }
 427
 428 static void adi_init_center(struct adi *adi)
 429 {
 430         int i, t, x;
 431
 432         if (!adi->length)
 433                 return;
 434
 435         for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++) {
 436
 437                 t = adi->abs[i];
 438                 x = input_abs_get_val(adi->dev, t);
 439
 440                 if (t == ABS_THROTTLE || t == ABS_RUDDER || adi->id == ADI_ID_WGPE)
 441                         x = i < adi->axes10 ? 512 : 128;
 442
 443                 if (i < adi->axes10)
 444                         input_set_abs_params(adi->dev, t, 64, x * 2 - 64, 2, 16);
 445                 else if (i < adi->axes10 + adi->axes8)
 446                         input_set_abs_params(adi->dev, t, 48, x * 2 - 48, 1, 16);
 447                 else
 448                         input_set_abs_params(adi->dev, t, -1, 1, 0, 0);
 449         }
 450 }
 451
 452 /*
 453  * adi_connect() probes for Logitech ADI joysticks.
 454  */
 455
 456 static int adi_connect(struct gameport *gameport, struct gameport_driver *drv)
 457 {
 458         struct adi_port *port;
 459         int i;
 460         int err;
 461
 462         port = kzalloc(sizeof(struct adi_port), GFP_KERNEL);
 463         if (!port)
 464                 return -ENOMEM;
 465
 466         port->gameport = gameport;
 467
 468         gameport_set_drvdata(gameport, port);
 469
 470         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 471         if (err)
 472                 goto fail1;
 473
 474         adi_init_digital(gameport);
 475         adi_read_packet(port);
 476
 477         if (port->adi[0].ret >= ADI_MIN_LEN_LENGTH)
 478                 adi_move_bits(port, adi_get_bits(port->adi, 10));
 479
 480         for (i = 0; i < 2; i++) {
 481                 adi_id_decode(port->adi + i, port);
 482
 483                 if (!port->adi[i].length)
 484                         continue;
 485
 486                 err = adi_init_input(port->adi + i, port, i);
 487                 if (err)
 488                         goto fail2;
 489         }
 490
 491         if (!port->adi[0].length && !port->adi[1].length) {
 492                 err = -ENODEV;
 493                 goto fail2;
 494         }
 495
 496         gameport_set_poll_handler(gameport, adi_poll);
 497         gameport_set_poll_interval(gameport, 20);
 498
 499         msleep(ADI_INIT_DELAY);
 500         if (adi_read(port)) {
 501                 msleep(ADI_DATA_DELAY);
 502                 adi_read(port);
 503         }
 504
 505         for (i = 0; i < 2; i++)
 506                 if (port->adi[i].length > 0) {
 507                         adi_init_center(port->adi + i);
 508                         err = input_register_device(port->adi[i].dev);
 509                         if (err)
 510                                 goto fail3;
 511                 }
 512
 513         return 0;
 514
 515  fail3: while (--i >= 0) {
 516                 if (port->adi[i].length > 0) {
 517                         input_unregister_device(port->adi[i].dev);
 518                         port->adi[i].dev = NULL;
 519                 }
 520         }
 521  fail2: for (i = 0; i < 2; i++)
 522                 input_free_device(port->adi[i].dev);
 523         gameport_close(gameport);
 524  fail1: gameport_set_drvdata(gameport, NULL);
 525         kfree(port);
 526         return err;
 527 }
 528
 529 static void adi_disconnect(struct gameport *gameport)
 530 {
 531         int i;
 532         struct adi_port *port = gameport_get_drvdata(gameport);
 533
 534         for (i = 0; i < 2; i++)
 535                 if (port->adi[i].length > 0)
 536                         input_unregister_device(port->adi[i].dev);
 537         gameport_close(gameport);
 538         gameport_set_drvdata(gameport, NULL);
 539         kfree(port);
 540 }
 541
 542 static struct gameport_driver adi_drv = {
 543         .driver         = {
 544                 .name   = "adi",
 545         },
 546         .description    = DRIVER_DESC,
 547         .connect        = adi_connect,
 548         .disconnect     = adi_disconnect,
 549 };
 550
 551 module_gameport_driver(adi_drv);