drivers/input/joystick/a3d.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 1998-2001 Vojtech Pavlik
   4  */
   5
   6 /*
   7  * FP-Gaming Assassin 3D joystick driver for Linux
   8  */
   9
  10 /*
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/slab.h>
  16 #include <linux/gameport.h>
  17 #include <linux/input.h>
  18 #include <linux/jiffies.h>
  19
  20 #define DRIVER_DESC     "FP-Gaming Assassin 3D joystick driver"
  21
  22 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  23 MODULE_DESCRIPTION(DRIVER_DESC);
  24 MODULE_LICENSE("GPL");
  25
  26 #define A3D_MAX_START           600     /* 600 us */
  27 #define A3D_MAX_STROBE          80      /* 80 us */
  28 #define A3D_MAX_LENGTH          40      /* 40*3 bits */
  29
  30 #define A3D_MODE_A3D            1       /* Assassin 3D */
  31 #define A3D_MODE_PAN            2       /* Panther */
  32 #define A3D_MODE_OEM            3       /* Panther OEM version */
  33 #define A3D_MODE_PXL            4       /* Panther XL */
  34
  35 static char *a3d_names[] = { NULL, "FP-Gaming Assassin 3D", "MadCatz Panther", "OEM Panther",
  36                         "MadCatz Panther XL", "MadCatz Panther XL w/ rudder" };
  37
  38 struct a3d {
  39         struct gameport *gameport;
  40         struct gameport *adc;
  41         struct input_dev *dev;
  42         int axes[4];
  43         int buttons;
  44         int mode;
  45         int length;
  46         int reads;
  47         int bads;
  48         char phys[32];
  49 };
  50
  51 /*
  52  * a3d_read_packet() reads an Assassin 3D packet.
  53  */
  54
  55 static int a3d_read_packet(struct gameport *gameport, int length, char *data)
  56 {
  57         unsigned long flags;
  58         unsigned char u, v;
  59         unsigned int t, s;
  60         int i;
  61
  62         i = 0;
  63         t = gameport_time(gameport, A3D_MAX_START);
  64         s = gameport_time(gameport, A3D_MAX_STROBE);
  65
  66         local_irq_save(flags);
  67         gameport_trigger(gameport);
  68         v = gameport_read(gameport);
  69
  70         while (t > 0 && i < length) {
  71                 t--;
  72                 u = v; v = gameport_read(gameport);
  73                 if (~v & u & 0x10) {
  74                         data[i++] = v >> 5;
  75                         t = s;
  76                 }
  77         }
  78
  79         local_irq_restore(flags);
  80
  81         return i;
  82 }
  83
  84 /*
  85  * a3d_csum() computes checksum of triplet packet
  86  */
  87
  88 static int a3d_csum(char *data, int count)
  89 {
  90         int i, csum = 0;
  91
  92         for (i = 0; i < count - 2; i++)
  93                 csum += data[i];
  94         return (csum & 0x3f) != ((data[count - 2] << 3) | data[count - 1]);
  95 }
  96
  97 static void a3d_read(struct a3d *a3d, unsigned char *data)
  98 {
  99         struct input_dev *dev = a3d->dev;
 100
 101         switch (a3d->mode) {
 102
 103                 case A3D_MODE_A3D:
 104                 case A3D_MODE_OEM:
 105                 case A3D_MODE_PAN:
 106
 107                         input_report_rel(dev, REL_X, ((data[5] << 6) | (data[6] << 3) | data[ 7]) - ((data[5] & 4) << 7));
 108                         input_report_rel(dev, REL_Y, ((data[8] << 6) | (data[9] << 3) | data[10]) - ((data[8] & 4) << 7));
 109
 110                         input_report_key(dev, BTN_RIGHT,  data[2] & 1);
 111                         input_report_key(dev, BTN_LEFT,   data[3] & 2);
 112                         input_report_key(dev, BTN_MIDDLE, data[3] & 4);
 113
 114                         input_sync(dev);
 115
 116                         a3d->axes[0] = ((signed char)((data[11] << 6) | (data[12] << 3) | (data[13]))) + 128;
 117                         a3d->axes[1] = ((signed char)((data[14] << 6) | (data[15] << 3) | (data[16]))) + 128;
 118                         a3d->axes[2] = ((signed char)((data[17] << 6) | (data[18] << 3) | (data[19]))) + 128;
 119                         a3d->axes[3] = ((signed char)((data[20] << 6) | (data[21] << 3) | (data[22]))) + 128;
 120
 121                         a3d->buttons = ((data[3] << 3) | data[4]) & 0xf;
 122
 123                         break;
 124
 125                 case A3D_MODE_PXL:
 126
 127                         input_report_rel(dev, REL_X, ((data[ 9] << 6) | (data[10] << 3) | data[11]) - ((data[ 9] & 4) << 7));
 128                         input_report_rel(dev, REL_Y, ((data[12] << 6) | (data[13] << 3) | data[14]) - ((data[12] & 4) << 7));
 129
 130                         input_report_key(dev, BTN_RIGHT,  data[2] & 1);
 131                         input_report_key(dev, BTN_LEFT,   data[3] & 2);
 132                         input_report_key(dev, BTN_MIDDLE, data[3] & 4);
 133                         input_report_key(dev, BTN_SIDE,   data[7] & 2);
 134                         input_report_key(dev, BTN_EXTRA,  data[7] & 4);
 135
 136                         input_report_abs(dev, ABS_X,        ((signed char)((data[15] << 6) | (data[16] << 3) | (data[17]))) + 128);
 137                         input_report_abs(dev, ABS_Y,        ((signed char)((data[18] << 6) | (data[19] << 3) | (data[20]))) + 128);
 138                         input_report_abs(dev, ABS_RUDDER,   ((signed char)((data[21] << 6) | (data[22] << 3) | (data[23]))) + 128);
 139                         input_report_abs(dev, ABS_THROTTLE, ((signed char)((data[24] << 6) | (data[25] << 3) | (data[26]))) + 128);
 140
 141                         input_report_abs(dev, ABS_HAT0X, ( data[5]       & 1) - ((data[5] >> 2) & 1));
 142                         input_report_abs(dev, ABS_HAT0Y, ((data[5] >> 1) & 1) - ((data[6] >> 2) & 1));
 143                         input_report_abs(dev, ABS_HAT1X, ((data[4] >> 1) & 1) - ( data[3]       & 1));
 144                         input_report_abs(dev, ABS_HAT1Y, ((data[4] >> 2) & 1) - ( data[4]       & 1));
 145
 146                         input_report_key(dev, BTN_TRIGGER, data[8] & 1);
 147                         input_report_key(dev, BTN_THUMB,   data[8] & 2);
 148                         input_report_key(dev, BTN_TOP,     data[8] & 4);
 149                         input_report_key(dev, BTN_PINKIE,  data[7] & 1);
 150
 151                         input_sync(dev);
 152
 153                         break;
 154         }
 155 }
 156
 157
 158 /*
 159  * a3d_poll() reads and analyzes A3D joystick data.
 160  */
 161
 162 static void a3d_poll(struct gameport *gameport)
 163 {
 164         struct a3d *a3d = gameport_get_drvdata(gameport);
 165         unsigned char data[A3D_MAX_LENGTH];
 166
 167         a3d->reads++;
 168         if (a3d_read_packet(a3d->gameport, a3d->length, data) != a3d->length ||
 169             data[0] != a3d->mode || a3d_csum(data, a3d->length))
 170                 a3d->bads++;
 171         else
 172                 a3d_read(a3d, data);
 173 }
 174
 175 /*
 176  * a3d_adc_cooked_read() copies the acis and button data to the
 177  * callers arrays. It could do the read itself, but the caller could
 178  * call this more than 50 times a second, which would use too much CPU.
 179  */
 180
 181 static int a3d_adc_cooked_read(struct gameport *gameport, int *axes, int *buttons)
 182 {
 183         struct a3d *a3d = gameport->port_data;
 184         int i;
 185
 186         for (i = 0; i < 4; i++)
 187                 axes[i] = (a3d->axes[i] < 254) ? a3d->axes[i] : -1;
 188         *buttons = a3d->buttons;
 189         return 0;
 190 }
 191
 192 /*
 193  * a3d_adc_open() is the gameport open routine. It refuses to serve
 194  * any but cooked data.
 195  */
 196
 197 static int a3d_adc_open(struct gameport *gameport, int mode)
 198 {
 199         struct a3d *a3d = gameport->port_data;
 200
 201         if (mode != GAMEPORT_MODE_COOKED)
 202                 return -1;
 203
 204         gameport_start_polling(a3d->gameport);
 205         return 0;
 206 }
 207
 208 /*
 209  * a3d_adc_close() is a callback from the input close routine.
 210  */
 211
 212 static void a3d_adc_close(struct gameport *gameport)
 213 {
 214         struct a3d *a3d = gameport->port_data;
 215
 216         gameport_stop_polling(a3d->gameport);
 217 }
 218
 219 /*
 220  * a3d_open() is a callback from the input open routine.
 221  */
 222
 223 static int a3d_open(struct input_dev *dev)
 224 {
 225         struct a3d *a3d = input_get_drvdata(dev);
 226
 227         gameport_start_polling(a3d->gameport);
 228         return 0;
 229 }
 230
 231 /*
 232  * a3d_close() is a callback from the input close routine.
 233  */
 234
 235 static void a3d_close(struct input_dev *dev)
 236 {
 237         struct a3d *a3d = input_get_drvdata(dev);
 238
 239         gameport_stop_polling(a3d->gameport);
 240 }
 241
 242 /*
 243  * a3d_connect() probes for A3D joysticks.
 244  */
 245
 246 static int a3d_connect(struct gameport *gameport, struct gameport_driver *drv)
 247 {
 248         struct a3d *a3d;
 249         struct input_dev *input_dev;
 250         struct gameport *adc;
 251         unsigned char data[A3D_MAX_LENGTH];
 252         int i;
 253         int err;
 254
 255         a3d = kzalloc(sizeof(struct a3d), GFP_KERNEL);
 256         input_dev = input_allocate_device();
 257         if (!a3d || !input_dev) {
 258                 err = -ENOMEM;
 259                 goto fail1;
 260         }
 261
 262         a3d->dev = input_dev;
 263         a3d->gameport = gameport;
 264
 265         gameport_set_drvdata(gameport, a3d);
 266
 267         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 268         if (err)
 269                 goto fail1;
 270
 271         i = a3d_read_packet(gameport, A3D_MAX_LENGTH, data);
 272
 273         if (!i || a3d_csum(data, i)) {
 274                 err = -ENODEV;
 275                 goto fail2;
 276         }
 277
 278         a3d->mode = data[0];
 279
 280         if (!a3d->mode || a3d->mode > 5) {
 281                 printk(KERN_WARNING "a3d.c: Unknown A3D device detected "
 282                         "(%s, id=%d), contact <vojtech@ucw.cz>\n", gameport->phys, a3d->mode);
 283                 err = -ENODEV;
 284                 goto fail2;
 285         }
 286
 287         gameport_set_poll_handler(gameport, a3d_poll);
 288         gameport_set_poll_interval(gameport, 20);
 289
 290         snprintf(a3d->phys, sizeof(a3d->phys), "%s/input0", gameport->phys);
 291
 292         input_dev->name = a3d_names[a3d->mode];
 293         input_dev->phys = a3d->phys;
 294         input_dev->id.bustype = BUS_GAMEPORT;
 295         input_dev->id.vendor = GAMEPORT_ID_VENDOR_MADCATZ;
 296         input_dev->id.product = a3d->mode;
 297         input_dev->id.version = 0x0100;
 298         input_dev->dev.parent = &gameport->dev;
 299         input_dev->open = a3d_open;
 300         input_dev->close = a3d_close;
 301
 302         input_set_drvdata(input_dev, a3d);
 303
 304         if (a3d->mode == A3D_MODE_PXL) {
 305
 306                 int axes[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER };
 307
 308                 a3d->length = 33;
 309
 310                 input_dev->evbit[0] |= BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY) |
 311                         BIT_MASK(EV_REL);
 312                 input_dev->relbit[0] |= BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 313                 input_dev->absbit[0] |= BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
 314                         BIT_MASK(ABS_THROTTLE) | BIT_MASK(ABS_RUDDER) |
 315                         BIT_MASK(ABS_HAT0X) | BIT_MASK(ABS_HAT0Y) |
 316                         BIT_MASK(ABS_HAT1X) | BIT_MASK(ABS_HAT1Y);
 317                 input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_RIGHT) |
 318                         BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) |
 319                         BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
 320                 input_dev->keybit[BIT_WORD(BTN_JOYSTICK)] |=
 321                         BIT_MASK(BTN_TRIGGER) | BIT_MASK(BTN_THUMB) |
 322                         BIT_MASK(BTN_TOP) | BIT_MASK(BTN_PINKIE);
 323
 324                 a3d_read(a3d, data);
 325
 326                 for (i = 0; i < 4; i++) {
 327                         if (i < 2)
 328                                 input_set_abs_params(input_dev, axes[i],
 329                                         48, input_abs_get_val(input_dev, axes[i]) * 2 - 48, 0, 8);
 330                         else
 331                                 input_set_abs_params(input_dev, axes[i], 2, 253, 0, 0);
 332                         input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 333                 }
 334
 335         } else {
 336                 a3d->length = 29;
 337
 338                 input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 339                 input_dev->relbit[0] |= BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 340                 input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_RIGHT) |
 341                         BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE);
 342
 343                 a3d_read(a3d, data);
 344
 345                 if (!(a3d->adc = adc = gameport_allocate_port()))
 346                         printk(KERN_ERR "a3d: Not enough memory for ADC port\n");
 347                 else {
 348                         adc->port_data = a3d;
 349                         adc->open = a3d_adc_open;
 350                         adc->close = a3d_adc_close;
 351                         adc->cooked_read = a3d_adc_cooked_read;
 352                         adc->fuzz = 1;
 353
 354                         gameport_set_name(adc, a3d_names[a3d->mode]);
 355                         gameport_set_phys(adc, "%s/gameport0", gameport->phys);
 356                         adc->dev.parent = &gameport->dev;
 357
 358                         gameport_register_port(adc);
 359                 }
 360         }
 361
 362         err = input_register_device(a3d->dev);
 363         if (err)
 364                 goto fail3;
 365
 366         return 0;
 367
 368  fail3: if (a3d->adc)
 369                 gameport_unregister_port(a3d->adc);
 370  fail2: gameport_close(gameport);
 371  fail1: gameport_set_drvdata(gameport, NULL);
 372         input_free_device(input_dev);
 373         kfree(a3d);
 374         return err;
 375 }
 376
 377 static void a3d_disconnect(struct gameport *gameport)
 378 {
 379         struct a3d *a3d = gameport_get_drvdata(gameport);
 380
 381         input_unregister_device(a3d->dev);
 382         if (a3d->adc)
 383                 gameport_unregister_port(a3d->adc);
 384         gameport_close(gameport);
 385         gameport_set_drvdata(gameport, NULL);
 386         kfree(a3d);
 387 }
 388
 389 static struct gameport_driver a3d_drv = {
 390         .driver         = {
 391                 .name   = "adc",
 392                 .owner  = THIS_MODULE,
 393         },
 394         .description    = DRIVER_DESC,
 395         .connect        = a3d_connect,
 396         .disconnect     = a3d_disconnect,
 397 };
 398
 399 module_gameport_driver(a3d_drv);