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