drivers/input/joystick/gamecon.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * NES, SNES, N64, MultiSystem, PSX gamepad driver for Linux
   4  *
   5  *  Copyright (c) 1999-2004     Vojtech Pavlik <vojtech@suse.cz>
   6  *  Copyright (c) 2004          Peter Nelson <rufus-kernel@hackish.org>
   7  *
   8  *  Based on the work of:
   9  *      Andree Borrmann         John Dahlstrom
  10  *      David Kuder             Nathan Hand
  11  *      Raphael Assenat
  12  */
  13
  14 /*
  15  */
  16
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18
  19 #include <linux/kernel.h>
  20 #include <linux/delay.h>
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/parport.h>
  24 #include <linux/input.h>
  25 #include <linux/mutex.h>
  26 #include <linux/slab.h>
  27
  28 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  29 MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
  30 MODULE_LICENSE("GPL");
  31
  32 #define GC_MAX_PORTS            3
  33 #define GC_MAX_DEVICES          5
  34
  35 struct gc_config {
  36         int args[GC_MAX_DEVICES + 1];
  37         unsigned int nargs;
  38 };
  39
  40 static struct gc_config gc_cfg[GC_MAX_PORTS];
  41
  42 module_param_array_named(map, gc_cfg[0].args, int, &gc_cfg[0].nargs, 0);
  43 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
  44 module_param_array_named(map2, gc_cfg[1].args, int, &gc_cfg[1].nargs, 0);
  45 MODULE_PARM_DESC(map2, "Describes second set of devices");
  46 module_param_array_named(map3, gc_cfg[2].args, int, &gc_cfg[2].nargs, 0);
  47 MODULE_PARM_DESC(map3, "Describes third set of devices");
  48
  49 /* see also gs_psx_delay parameter in PSX support section */
  50
  51 enum gc_type {
  52         GC_NONE = 0,
  53         GC_SNES,
  54         GC_NES,
  55         GC_NES4,
  56         GC_MULTI,
  57         GC_MULTI2,
  58         GC_N64,
  59         GC_PSX,
  60         GC_DDR,
  61         GC_SNESMOUSE,
  62         GC_MAX
  63 };
  64
  65 #define GC_REFRESH_TIME HZ/100
  66
  67 struct gc_pad {
  68         struct input_dev *dev;
  69         enum gc_type type;
  70         char phys[32];
  71 };
  72
  73 struct gc {
  74         struct pardevice *pd;
  75         struct gc_pad pads[GC_MAX_DEVICES];
  76         struct timer_list timer;
  77         int pad_count[GC_MAX];
  78         int used;
  79         int parportno;
  80         struct mutex mutex;
  81 };
  82
  83 struct gc_subdev {
  84         unsigned int idx;
  85 };
  86
  87 static struct gc *gc_base[3];
  88
  89 static const int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
  90
  91 static const char *gc_names[] = {
  92         NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
  93         "Multisystem 2-button joystick", "N64 controller", "PSX controller",
  94         "PSX DDR controller", "SNES mouse"
  95 };
  96
  97 /*
  98  * N64 support.
  99  */
 100
 101 static const unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
 102 static const short gc_n64_btn[] = {
 103         BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,
 104         BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START
 105 };
 106
 107 #define GC_N64_LENGTH           32              /* N64 bit length, not including stop bit */
 108 #define GC_N64_STOP_LENGTH      5               /* Length of encoded stop bit */
 109 #define GC_N64_CMD_00           0x11111111UL
 110 #define GC_N64_CMD_01           0xd1111111UL
 111 #define GC_N64_CMD_03           0xdd111111UL
 112 #define GC_N64_CMD_1b           0xdd1dd111UL
 113 #define GC_N64_CMD_c0           0x111111ddUL
 114 #define GC_N64_CMD_80           0x1111111dUL
 115 #define GC_N64_STOP_BIT         0x1d            /* Encoded stop bit */
 116 #define GC_N64_REQUEST_DATA     GC_N64_CMD_01   /* the request data command */
 117 #define GC_N64_DELAY            133             /* delay between transmit request, and response ready (us) */
 118 #define GC_N64_DWS              3               /* delay between write segments (required for sound playback because of ISA DMA) */
 119                                                 /* GC_N64_DWS > 24 is known to fail */
 120 #define GC_N64_POWER_W          0xe2            /* power during write (transmit request) */
 121 #define GC_N64_POWER_R          0xfd            /* power during read */
 122 #define GC_N64_OUT              0x1d            /* output bits to the 4 pads */
 123                                                 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
 124                                                 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
 125                                                 /* than 123 us */
 126 #define GC_N64_CLOCK            0x02            /* clock bits for read */
 127
 128 /*
 129  * Used for rumble code.
 130  */
 131
 132 /* Send encoded command */
 133 static void gc_n64_send_command(struct gc *gc, unsigned long cmd,
 134                                 unsigned char target)
 135 {
 136         struct parport *port = gc->pd->port;
 137         int i;
 138
 139         for (i = 0; i < GC_N64_LENGTH; i++) {
 140                 unsigned char data = (cmd >> i) & 1 ? target : 0;
 141                 parport_write_data(port, GC_N64_POWER_W | data);
 142                 udelay(GC_N64_DWS);
 143         }
 144 }
 145
 146 /* Send stop bit */
 147 static void gc_n64_send_stop_bit(struct gc *gc, unsigned char target)
 148 {
 149         struct parport *port = gc->pd->port;
 150         int i;
 151
 152         for (i = 0; i < GC_N64_STOP_LENGTH; i++) {
 153                 unsigned char data = (GC_N64_STOP_BIT >> i) & 1 ? target : 0;
 154                 parport_write_data(port, GC_N64_POWER_W | data);
 155                 udelay(GC_N64_DWS);
 156         }
 157 }
 158
 159 /*
 160  * gc_n64_read_packet() reads an N64 packet.
 161  * Each pad uses one bit per byte. So all pads connected to this port
 162  * are read in parallel.
 163  */
 164
 165 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
 166 {
 167         int i;
 168         unsigned long flags;
 169
 170 /*
 171  * Request the pad to transmit data
 172  */
 173
 174         local_irq_save(flags);
 175         gc_n64_send_command(gc, GC_N64_REQUEST_DATA, GC_N64_OUT);
 176         gc_n64_send_stop_bit(gc, GC_N64_OUT);
 177         local_irq_restore(flags);
 178
 179 /*
 180  * Wait for the pad response to be loaded into the 33-bit register
 181  * of the adapter.
 182  */
 183
 184         udelay(GC_N64_DELAY);
 185
 186 /*
 187  * Grab data (ignoring the last bit, which is a stop bit)
 188  */
 189
 190         for (i = 0; i < GC_N64_LENGTH; i++) {
 191                 parport_write_data(gc->pd->port, GC_N64_POWER_R);
 192                 udelay(2);
 193                 data[i] = parport_read_status(gc->pd->port);
 194                 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
 195          }
 196
 197 /*
 198  * We must wait 200 ms here for the controller to reinitialize before
 199  * the next read request. No worries as long as gc_read is polled less
 200  * frequently than this.
 201  */
 202
 203 }
 204
 205 static void gc_n64_process_packet(struct gc *gc)
 206 {
 207         unsigned char data[GC_N64_LENGTH];
 208         struct input_dev *dev;
 209         int i, j, s;
 210         signed char x, y;
 211
 212         gc_n64_read_packet(gc, data);
 213
 214         for (i = 0; i < GC_MAX_DEVICES; i++) {
 215
 216                 if (gc->pads[i].type != GC_N64)
 217                         continue;
 218
 219                 dev = gc->pads[i].dev;
 220                 s = gc_status_bit[i];
 221
 222                 if (s & ~(data[8] | data[9])) {
 223
 224                         x = y = 0;
 225
 226                         for (j = 0; j < 8; j++) {
 227                                 if (data[23 - j] & s)
 228                                         x |= 1 << j;
 229                                 if (data[31 - j] & s)
 230                                         y |= 1 << j;
 231                         }
 232
 233                         input_report_abs(dev, ABS_X,  x);
 234                         input_report_abs(dev, ABS_Y, -y);
 235
 236                         input_report_abs(dev, ABS_HAT0X,
 237                                          !(s & data[6]) - !(s & data[7]));
 238                         input_report_abs(dev, ABS_HAT0Y,
 239                                          !(s & data[4]) - !(s & data[5]));
 240
 241                         for (j = 0; j < 10; j++)
 242                                 input_report_key(dev, gc_n64_btn[j],
 243                                                  s & data[gc_n64_bytes[j]]);
 244
 245                         input_sync(dev);
 246                 }
 247         }
 248 }
 249
 250 static int gc_n64_play_effect(struct input_dev *dev, void *data,
 251                               struct ff_effect *effect)
 252 {
 253         int i;
 254         unsigned long flags;
 255         struct gc *gc = input_get_drvdata(dev);
 256         struct gc_subdev *sdev = data;
 257         unsigned char target = 1 << sdev->idx; /* select desired pin */
 258
 259         if (effect->type == FF_RUMBLE) {
 260                 struct ff_rumble_effect *rumble = &effect->u.rumble;
 261                 unsigned int cmd =
 262                         rumble->strong_magnitude || rumble->weak_magnitude ?
 263                         GC_N64_CMD_01 : GC_N64_CMD_00;
 264
 265                 local_irq_save(flags);
 266
 267                 /* Init Rumble - 0x03, 0x80, 0x01, (34)0x80 */
 268                 gc_n64_send_command(gc, GC_N64_CMD_03, target);
 269                 gc_n64_send_command(gc, GC_N64_CMD_80, target);
 270                 gc_n64_send_command(gc, GC_N64_CMD_01, target);
 271                 for (i = 0; i < 32; i++)
 272                         gc_n64_send_command(gc, GC_N64_CMD_80, target);
 273                 gc_n64_send_stop_bit(gc, target);
 274
 275                 udelay(GC_N64_DELAY);
 276
 277                 /* Now start or stop it - 0x03, 0xc0, 0zx1b, (32)0x01/0x00 */
 278                 gc_n64_send_command(gc, GC_N64_CMD_03, target);
 279                 gc_n64_send_command(gc, GC_N64_CMD_c0, target);
 280                 gc_n64_send_command(gc, GC_N64_CMD_1b, target);
 281                 for (i = 0; i < 32; i++)
 282                         gc_n64_send_command(gc, cmd, target);
 283                 gc_n64_send_stop_bit(gc, target);
 284
 285                 local_irq_restore(flags);
 286
 287         }
 288
 289         return 0;
 290 }
 291
 292 static int gc_n64_init_ff(struct input_dev *dev, int i)
 293 {
 294         struct gc_subdev *sdev;
 295         int err;
 296
 297         sdev = kmalloc(sizeof(*sdev), GFP_KERNEL);
 298         if (!sdev)
 299                 return -ENOMEM;
 300
 301         sdev->idx = i;
 302
 303         input_set_capability(dev, EV_FF, FF_RUMBLE);
 304
 305         err = input_ff_create_memless(dev, sdev, gc_n64_play_effect);
 306         if (err) {
 307                 kfree(sdev);
 308                 return err;
 309         }
 310
 311         return 0;
 312 }
 313
 314 /*
 315  * NES/SNES support.
 316  */
 317
 318 #define GC_NES_DELAY            6       /* Delay between bits - 6us */
 319 #define GC_NES_LENGTH           8       /* The NES pads use 8 bits of data */
 320 #define GC_SNES_LENGTH          12      /* The SNES true length is 16, but the
 321                                            last 4 bits are unused */
 322 #define GC_SNESMOUSE_LENGTH     32      /* The SNES mouse uses 32 bits, the first
 323                                            16 bits are equivalent to a gamepad */
 324
 325 #define GC_NES_POWER    0xfc
 326 #define GC_NES_CLOCK    0x01
 327 #define GC_NES_LATCH    0x02
 328
 329 static const unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
 330 static const unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
 331 static const short gc_snes_btn[] = {
 332         BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR
 333 };
 334
 335 /*
 336  * gc_nes_read_packet() reads a NES/SNES packet.
 337  * Each pad uses one bit per byte. So all pads connected to
 338  * this port are read in parallel.
 339  */
 340
 341 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
 342 {
 343         int i;
 344
 345         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
 346         udelay(GC_NES_DELAY * 2);
 347         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 348
 349         for (i = 0; i < length; i++) {
 350                 udelay(GC_NES_DELAY);
 351                 parport_write_data(gc->pd->port, GC_NES_POWER);
 352                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 353                 udelay(GC_NES_DELAY);
 354                 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 355         }
 356 }
 357
 358 static void gc_nes_process_packet(struct gc *gc)
 359 {
 360         unsigned char data[GC_SNESMOUSE_LENGTH];
 361         struct gc_pad *pad;
 362         struct input_dev *dev;
 363         int i, j, s, len;
 364         char x_rel, y_rel;
 365
 366         len = gc->pad_count[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
 367                         (gc->pad_count[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
 368
 369         gc_nes_read_packet(gc, len, data);
 370
 371         for (i = 0; i < GC_MAX_DEVICES; i++) {
 372
 373                 pad = &gc->pads[i];
 374                 dev = pad->dev;
 375                 s = gc_status_bit[i];
 376
 377                 switch (pad->type) {
 378
 379                 case GC_NES:
 380
 381                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
 382                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
 383
 384                         for (j = 0; j < 4; j++)
 385                                 input_report_key(dev, gc_snes_btn[j],
 386                                                  s & data[gc_nes_bytes[j]]);
 387                         input_sync(dev);
 388                         break;
 389
 390                 case GC_SNES:
 391
 392                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
 393                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
 394
 395                         for (j = 0; j < 8; j++)
 396                                 input_report_key(dev, gc_snes_btn[j],
 397                                                  s & data[gc_snes_bytes[j]]);
 398                         input_sync(dev);
 399                         break;
 400
 401                 case GC_SNESMOUSE:
 402                         /*
 403                          * The 4 unused bits from SNES controllers appear
 404                          * to be ID bits so use them to make sure we are
 405                          * dealing with a mouse.
 406                          * gamepad is connected. This is important since
 407                          * my SNES gamepad sends 1's for bits 16-31, which
 408                          * cause the mouse pointer to quickly move to the
 409                          * upper left corner of the screen.
 410                          */
 411                         if (!(s & data[12]) && !(s & data[13]) &&
 412                             !(s & data[14]) && (s & data[15])) {
 413                                 input_report_key(dev, BTN_LEFT, s & data[9]);
 414                                 input_report_key(dev, BTN_RIGHT, s & data[8]);
 415
 416                                 x_rel = y_rel = 0;
 417                                 for (j = 0; j < 7; j++) {
 418                                         x_rel <<= 1;
 419                                         if (data[25 + j] & s)
 420                                                 x_rel |= 1;
 421
 422                                         y_rel <<= 1;
 423                                         if (data[17 + j] & s)
 424                                                 y_rel |= 1;
 425                                 }
 426
 427                                 if (x_rel) {
 428                                         if (data[24] & s)
 429                                                 x_rel = -x_rel;
 430                                         input_report_rel(dev, REL_X, x_rel);
 431                                 }
 432
 433                                 if (y_rel) {
 434                                         if (data[16] & s)
 435                                                 y_rel = -y_rel;
 436                                         input_report_rel(dev, REL_Y, y_rel);
 437                                 }
 438
 439                                 input_sync(dev);
 440                         }
 441                         break;
 442
 443                 default:
 444                         break;
 445                 }
 446         }
 447 }
 448
 449 /*
 450  * Multisystem joystick support
 451  */
 452
 453 #define GC_MULTI_LENGTH         5       /* Multi system joystick packet length is 5 */
 454 #define GC_MULTI2_LENGTH        6       /* One more bit for one more button */
 455
 456 /*
 457  * gc_multi_read_packet() reads a Multisystem joystick packet.
 458  */
 459
 460 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
 461 {
 462         int i;
 463
 464         for (i = 0; i < length; i++) {
 465                 parport_write_data(gc->pd->port, ~(1 << i));
 466                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 467         }
 468 }
 469
 470 static void gc_multi_process_packet(struct gc *gc)
 471 {
 472         unsigned char data[GC_MULTI2_LENGTH];
 473         int data_len = gc->pad_count[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH;
 474         struct gc_pad *pad;
 475         struct input_dev *dev;
 476         int i, s;
 477
 478         gc_multi_read_packet(gc, data_len, data);
 479
 480         for (i = 0; i < GC_MAX_DEVICES; i++) {
 481                 pad = &gc->pads[i];
 482                 dev = pad->dev;
 483                 s = gc_status_bit[i];
 484
 485                 switch (pad->type) {
 486                 case GC_MULTI2:
 487                         input_report_key(dev, BTN_THUMB, s & data[5]);
 488                         fallthrough;
 489
 490                 case GC_MULTI:
 491                         input_report_abs(dev, ABS_X,
 492                                          !(s & data[2]) - !(s & data[3]));
 493                         input_report_abs(dev, ABS_Y,
 494                                          !(s & data[0]) - !(s & data[1]));
 495                         input_report_key(dev, BTN_TRIGGER, s & data[4]);
 496                         input_sync(dev);
 497                         break;
 498
 499                 default:
 500                         break;
 501                 }
 502         }
 503 }
 504
 505 /*
 506  * PSX support
 507  *
 508  * See documentation at:
 509  *      http://www.geocities.co.jp/Playtown/2004/psx/ps_eng.txt
 510  *      http://www.gamesx.com/controldata/psxcont/psxcont.htm
 511  *
 512  */
 513
 514 #define GC_PSX_DELAY    25              /* 25 usec */
 515 #define GC_PSX_LENGTH   8               /* talk to the controller in bits */
 516 #define GC_PSX_BYTES    6               /* the maximum number of bytes to read off the controller */
 517
 518 #define GC_PSX_MOUSE    1               /* Mouse */
 519 #define GC_PSX_NEGCON   2               /* NegCon */
 520 #define GC_PSX_NORMAL   4               /* Digital / Analog or Rumble in Digital mode  */
 521 #define GC_PSX_ANALOG   5               /* Analog in Analog mode / Rumble in Green mode */
 522 #define GC_PSX_RUMBLE   7               /* Rumble in Red mode */
 523
 524 #define GC_PSX_CLOCK    0x04            /* Pin 4 */
 525 #define GC_PSX_COMMAND  0x01            /* Pin 2 */
 526 #define GC_PSX_POWER    0xf8            /* Pins 5-9 */
 527 #define GC_PSX_SELECT   0x02            /* Pin 3 */
 528
 529 #define GC_PSX_ID(x)    ((x) >> 4)      /* High nibble is device type */
 530 #define GC_PSX_LEN(x)   (((x) & 0xf) << 1)      /* Low nibble is length in bytes/2 */
 531
 532 static int gc_psx_delay = GC_PSX_DELAY;
 533 module_param_named(psx_delay, gc_psx_delay, uint, 0);
 534 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
 535
 536 static const short gc_psx_abs[] = {
 537         ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y
 538 };
 539 static const short gc_psx_btn[] = {
 540         BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
 541         BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR
 542 };
 543 static const short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
 544
 545 /*
 546  * gc_psx_command() writes 8bit command and reads 8bit data from
 547  * the psx pad.
 548  */
 549
 550 static void gc_psx_command(struct gc *gc, int b, unsigned char *data)
 551 {
 552         struct parport *port = gc->pd->port;
 553         int i, j, cmd, read;
 554
 555         memset(data, 0, GC_MAX_DEVICES);
 556
 557         for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
 558                 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
 559                 parport_write_data(port, cmd | GC_PSX_POWER);
 560                 udelay(gc_psx_delay);
 561
 562                 read = parport_read_status(port) ^ 0x80;
 563
 564                 for (j = 0; j < GC_MAX_DEVICES; j++) {
 565                         struct gc_pad *pad = &gc->pads[j];
 566
 567                         if (pad->type == GC_PSX || pad->type == GC_DDR)
 568                                 data[j] |= (read & gc_status_bit[j]) ? (1 << i) : 0;
 569                 }
 570
 571                 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
 572                 udelay(gc_psx_delay);
 573         }
 574 }
 575
 576 /*
 577  * gc_psx_read_packet() reads a whole psx packet and returns
 578  * device identifier code.
 579  */
 580
 581 static void gc_psx_read_packet(struct gc *gc,
 582                                unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
 583                                unsigned char id[GC_MAX_DEVICES])
 584 {
 585         int i, j, max_len = 0;
 586         unsigned long flags;
 587         unsigned char data2[GC_MAX_DEVICES];
 588
 589         /* Select pad */
 590         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 591         udelay(gc_psx_delay);
 592         /* Deselect, begin command */
 593         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);
 594         udelay(gc_psx_delay);
 595
 596         local_irq_save(flags);
 597
 598         gc_psx_command(gc, 0x01, data2);        /* Access pad */
 599         gc_psx_command(gc, 0x42, id);           /* Get device ids */
 600         gc_psx_command(gc, 0, data2);           /* Dump status */
 601
 602         /* Find the longest pad */
 603         for (i = 0; i < GC_MAX_DEVICES; i++) {
 604                 struct gc_pad *pad = &gc->pads[i];
 605
 606                 if ((pad->type == GC_PSX || pad->type == GC_DDR) &&
 607                     GC_PSX_LEN(id[i]) > max_len &&
 608                     GC_PSX_LEN(id[i]) <= GC_PSX_BYTES) {
 609                         max_len = GC_PSX_LEN(id[i]);
 610                 }
 611         }
 612
 613         /* Read in all the data */
 614         for (i = 0; i < max_len; i++) {
 615                 gc_psx_command(gc, 0, data2);
 616                 for (j = 0; j < GC_MAX_DEVICES; j++)
 617                         data[j][i] = data2[j];
 618         }
 619
 620         local_irq_restore(flags);
 621
 622         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 623
 624         /* Set id's to the real value */
 625         for (i = 0; i < GC_MAX_DEVICES; i++)
 626                 id[i] = GC_PSX_ID(id[i]);
 627 }
 628
 629 static void gc_psx_report_one(struct gc_pad *pad, unsigned char psx_type,
 630                               unsigned char *data)
 631 {
 632         struct input_dev *dev = pad->dev;
 633         int i;
 634
 635         switch (psx_type) {
 636
 637         case GC_PSX_RUMBLE:
 638
 639                 input_report_key(dev, BTN_THUMBL, ~data[0] & 0x04);
 640                 input_report_key(dev, BTN_THUMBR, ~data[0] & 0x02);
 641                 fallthrough;
 642
 643         case GC_PSX_NEGCON:
 644         case GC_PSX_ANALOG:
 645
 646                 if (pad->type == GC_DDR) {
 647                         for (i = 0; i < 4; i++)
 648                                 input_report_key(dev, gc_psx_ddr_btn[i],
 649                                                  ~data[0] & (0x10 << i));
 650                 } else {
 651                         for (i = 0; i < 4; i++)
 652                                 input_report_abs(dev, gc_psx_abs[i + 2],
 653                                                  data[i + 2]);
 654
 655                         input_report_abs(dev, ABS_X,
 656                                 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
 657                         input_report_abs(dev, ABS_Y,
 658                                 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
 659                 }
 660
 661                 for (i = 0; i < 8; i++)
 662                         input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
 663
 664                 input_report_key(dev, BTN_START,  ~data[0] & 0x08);
 665                 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
 666
 667                 input_sync(dev);
 668
 669                 break;
 670
 671         case GC_PSX_NORMAL:
 672
 673                 if (pad->type == GC_DDR) {
 674                         for (i = 0; i < 4; i++)
 675                                 input_report_key(dev, gc_psx_ddr_btn[i],
 676                                                  ~data[0] & (0x10 << i));
 677                 } else {
 678                         input_report_abs(dev, ABS_X,
 679                                 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
 680                         input_report_abs(dev, ABS_Y,
 681                                 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
 682
 683                         /*
 684                          * For some reason if the extra axes are left unset
 685                          * they drift.
 686                          * for (i = 0; i < 4; i++)
 687                                 input_report_abs(dev, gc_psx_abs[i + 2], 128);
 688                          * This needs to be debugged properly,
 689                          * maybe fuzz processing needs to be done
 690                          * in input_sync()
 691                          *                               --vojtech
 692                          */
 693                 }
 694
 695                 for (i = 0; i < 8; i++)
 696                         input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
 697
 698                 input_report_key(dev, BTN_START,  ~data[0] & 0x08);
 699                 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
 700
 701                 input_sync(dev);
 702
 703                 break;
 704
 705         default: /* not a pad, ignore */
 706                 break;
 707         }
 708 }
 709
 710 static void gc_psx_process_packet(struct gc *gc)
 711 {
 712         unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
 713         unsigned char id[GC_MAX_DEVICES];
 714         struct gc_pad *pad;
 715         int i;
 716
 717         gc_psx_read_packet(gc, data, id);
 718
 719         for (i = 0; i < GC_MAX_DEVICES; i++) {
 720                 pad = &gc->pads[i];
 721                 if (pad->type == GC_PSX || pad->type == GC_DDR)
 722                         gc_psx_report_one(pad, id[i], data[i]);
 723         }
 724 }
 725
 726 /*
 727  * gc_timer() initiates reads of console pads data.
 728  */
 729
 730 static void gc_timer(struct timer_list *t)
 731 {
 732         struct gc *gc = from_timer(gc, t, timer);
 733
 734 /*
 735  * N64 pads - must be read first, any read confuses them for 200 us
 736  */
 737
 738         if (gc->pad_count[GC_N64])
 739                 gc_n64_process_packet(gc);
 740
 741 /*
 742  * NES and SNES pads or mouse
 743  */
 744
 745         if (gc->pad_count[GC_NES] ||
 746             gc->pad_count[GC_SNES] ||
 747             gc->pad_count[GC_SNESMOUSE]) {
 748                 gc_nes_process_packet(gc);
 749         }
 750
 751 /*
 752  * Multi and Multi2 joysticks
 753  */
 754
 755         if (gc->pad_count[GC_MULTI] || gc->pad_count[GC_MULTI2])
 756                 gc_multi_process_packet(gc);
 757
 758 /*
 759  * PSX controllers
 760  */
 761
 762         if (gc->pad_count[GC_PSX] || gc->pad_count[GC_DDR])
 763                 gc_psx_process_packet(gc);
 764
 765         mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 766 }
 767
 768 static int gc_open(struct input_dev *dev)
 769 {
 770         struct gc *gc = input_get_drvdata(dev);
 771         int err;
 772
 773         err = mutex_lock_interruptible(&gc->mutex);
 774         if (err)
 775                 return err;
 776
 777         if (!gc->used++) {
 778                 parport_claim(gc->pd);
 779                 parport_write_control(gc->pd->port, 0x04);
 780                 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 781         }
 782
 783         mutex_unlock(&gc->mutex);
 784         return 0;
 785 }
 786
 787 static void gc_close(struct input_dev *dev)
 788 {
 789         struct gc *gc = input_get_drvdata(dev);
 790
 791         mutex_lock(&gc->mutex);
 792         if (!--gc->used) {
 793                 del_timer_sync(&gc->timer);
 794                 parport_write_control(gc->pd->port, 0x00);
 795                 parport_release(gc->pd);
 796         }
 797         mutex_unlock(&gc->mutex);
 798 }
 799
 800 static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
 801 {
 802         struct gc_pad *pad = &gc->pads[idx];
 803         struct input_dev *input_dev;
 804         int i;
 805         int err;
 806
 807         if (pad_type < 1 || pad_type >= GC_MAX) {
 808                 pr_err("Pad type %d unknown\n", pad_type);
 809                 return -EINVAL;
 810         }
 811
 812         pad->dev = input_dev = input_allocate_device();
 813         if (!input_dev) {
 814                 pr_err("Not enough memory for input device\n");
 815                 return -ENOMEM;
 816         }
 817
 818         pad->type = pad_type;
 819
 820         snprintf(pad->phys, sizeof(pad->phys),
 821                  "%s/input%d", gc->pd->port->name, idx);
 822
 823         input_dev->name = gc_names[pad_type];
 824         input_dev->phys = pad->phys;
 825         input_dev->id.bustype = BUS_PARPORT;
 826         input_dev->id.vendor = 0x0001;
 827         input_dev->id.product = pad_type;
 828         input_dev->id.version = 0x0100;
 829
 830         input_set_drvdata(input_dev, gc);
 831
 832         input_dev->open = gc_open;
 833         input_dev->close = gc_close;
 834
 835         if (pad_type != GC_SNESMOUSE) {
 836                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 837
 838                 for (i = 0; i < 2; i++)
 839                         input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
 840         } else
 841                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 842
 843         gc->pad_count[pad_type]++;
 844
 845         switch (pad_type) {
 846
 847         case GC_N64:
 848                 for (i = 0; i < 10; i++)
 849                         input_set_capability(input_dev, EV_KEY, gc_n64_btn[i]);
 850
 851                 for (i = 0; i < 2; i++) {
 852                         input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
 853                         input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 854                 }
 855
 856                 err = gc_n64_init_ff(input_dev, idx);
 857                 if (err) {
 858                         pr_warn("Failed to initiate rumble for N64 device %d\n",
 859                                 idx);
 860                         goto err_free_dev;
 861                 }
 862
 863                 break;
 864
 865         case GC_SNESMOUSE:
 866                 input_set_capability(input_dev, EV_KEY, BTN_LEFT);
 867                 input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
 868                 input_set_capability(input_dev, EV_REL, REL_X);
 869                 input_set_capability(input_dev, EV_REL, REL_Y);
 870                 break;
 871
 872         case GC_SNES:
 873                 for (i = 4; i < 8; i++)
 874                         input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
 875                 fallthrough;
 876
 877         case GC_NES:
 878                 for (i = 0; i < 4; i++)
 879                         input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
 880                 break;
 881
 882         case GC_MULTI2:
 883                 input_set_capability(input_dev, EV_KEY, BTN_THUMB);
 884                 fallthrough;
 885
 886         case GC_MULTI:
 887                 input_set_capability(input_dev, EV_KEY, BTN_TRIGGER);
 888                 break;
 889
 890         case GC_PSX:
 891                 for (i = 0; i < 6; i++)
 892                         input_set_abs_params(input_dev,
 893                                              gc_psx_abs[i], 4, 252, 0, 2);
 894                 for (i = 0; i < 12; i++)
 895                         input_set_capability(input_dev, EV_KEY, gc_psx_btn[i]);
 896                 break;
 897
 898                 break;
 899
 900         case GC_DDR:
 901                 for (i = 0; i < 4; i++)
 902                         input_set_capability(input_dev, EV_KEY,
 903                                              gc_psx_ddr_btn[i]);
 904                 for (i = 0; i < 12; i++)
 905                         input_set_capability(input_dev, EV_KEY, gc_psx_btn[i]);
 906
 907                 break;
 908         }
 909
 910         err = input_register_device(pad->dev);
 911         if (err)
 912                 goto err_free_dev;
 913
 914         return 0;
 915
 916 err_free_dev:
 917         input_free_device(pad->dev);
 918         pad->dev = NULL;
 919         return err;
 920 }
 921
 922 static void gc_attach(struct parport *pp)
 923 {
 924         struct gc *gc;
 925         struct pardevice *pd;
 926         int i, port_idx;
 927         int count = 0;
 928         int *pads, n_pads;
 929         struct pardev_cb gc_parport_cb;
 930
 931         for (port_idx = 0; port_idx < GC_MAX_PORTS; port_idx++) {
 932                 if (gc_cfg[port_idx].nargs == 0 || gc_cfg[port_idx].args[0] < 0)
 933                         continue;
 934
 935                 if (gc_cfg[port_idx].args[0] == pp->number)
 936                         break;
 937         }
 938
 939         if (port_idx == GC_MAX_PORTS) {
 940                 pr_debug("Not using parport%d.\n", pp->number);
 941                 return;
 942         }
 943         pads = gc_cfg[port_idx].args + 1;
 944         n_pads = gc_cfg[port_idx].nargs - 1;
 945
 946         memset(&gc_parport_cb, 0, sizeof(gc_parport_cb));
 947         gc_parport_cb.flags = PARPORT_FLAG_EXCL;
 948
 949         pd = parport_register_dev_model(pp, "gamecon", &gc_parport_cb,
 950                                         port_idx);
 951         if (!pd) {
 952                 pr_err("parport busy already - lp.o loaded?\n");
 953                 return;
 954         }
 955
 956         gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
 957         if (!gc) {
 958                 pr_err("Not enough memory\n");
 959                 goto err_unreg_pardev;
 960         }
 961
 962         mutex_init(&gc->mutex);
 963         gc->pd = pd;
 964         gc->parportno = pp->number;
 965         timer_setup(&gc->timer, gc_timer, 0);
 966
 967         for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
 968                 if (!pads[i])
 969                         continue;
 970
 971                 if (gc_setup_pad(gc, i, pads[i]))
 972                         goto err_unreg_devs;
 973
 974                 count++;
 975         }
 976
 977         if (count == 0) {
 978                 pr_err("No valid devices specified\n");
 979                 goto err_free_gc;
 980         }
 981
 982         gc_base[port_idx] = gc;
 983         return;
 984
 985  err_unreg_devs:
 986         while (--i >= 0)
 987                 if (gc->pads[i].dev)
 988                         input_unregister_device(gc->pads[i].dev);
 989  err_free_gc:
 990         kfree(gc);
 991  err_unreg_pardev:
 992         parport_unregister_device(pd);
 993 }
 994
 995 static void gc_detach(struct parport *port)
 996 {
 997         int i;
 998         struct gc *gc;
 999
1000         for (i = 0; i < GC_MAX_PORTS; i++) {
1001                 if (gc_base[i] && gc_base[i]->parportno == port->number)
1002                         break;
1003         }
1004
1005         if (i == GC_MAX_PORTS)
1006                 return;
1007
1008         gc = gc_base[i];
1009         gc_base[i] = NULL;
1010
1011         for (i = 0; i < GC_MAX_DEVICES; i++)
1012                 if (gc->pads[i].dev)
1013                         input_unregister_device(gc->pads[i].dev);
1014         parport_unregister_device(gc->pd);
1015         kfree(gc);
1016 }
1017
1018 static struct parport_driver gc_parport_driver = {
1019         .name = "gamecon",
1020         .match_port = gc_attach,
1021         .detach = gc_detach,
1022         .devmodel = true,
1023 };
1024
1025 static int __init gc_init(void)
1026 {
1027         int i;
1028         int have_dev = 0;
1029
1030         for (i = 0; i < GC_MAX_PORTS; i++) {
1031                 if (gc_cfg[i].nargs == 0 || gc_cfg[i].args[0] < 0)
1032                         continue;
1033
1034                 if (gc_cfg[i].nargs < 2) {
1035                         pr_err("at least one device must be specified\n");
1036                         return -EINVAL;
1037                 }
1038
1039                 have_dev = 1;
1040         }
1041
1042         if (!have_dev)
1043                 return -ENODEV;
1044
1045         return parport_register_driver(&gc_parport_driver);
1046 }
1047
1048 static void __exit gc_exit(void)
1049 {
1050         parport_unregister_driver(&gc_parport_driver);
1051 }
1052
1053 module_init(gc_init);
1054 module_exit(gc_exit);