git.oblomov.eu Git - linux-2.6/blob - drivers/input/joystick/gamecon.c

   1 /*
   2  * NES, SNES, N64, MultiSystem, PSX gamepad driver for Linux
   3  *
   4  *  Copyright (c) 1999-2004     Vojtech Pavlik <vojtech@suse.cz>
   5  *  Copyright (c) 2004          Peter Nelson <rufus-kernel@hackish.org>
   6  *
   7  *  Based on the work of:
   8  *      Andree Borrmann         John Dahlstrom
   9  *      David Kuder             Nathan Hand
  10  */
  11
  12 /*
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26  *
  27  * Should you need to contact me, the author, you can do so either by
  28  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  29  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/delay.h>
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/init.h>
  37 #include <linux/parport.h>
  38 #include <linux/input.h>
  39
  40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  41 MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
  42 MODULE_LICENSE("GPL");
  43
  44 #define GC_MAX_PORTS            3
  45 #define GC_MAX_DEVICES          5
  46
  47 struct gc_config {
  48         int args[GC_MAX_DEVICES + 1];
  49         int nargs;
  50 };
  51
  52 static struct gc_config gc[GC_MAX_PORTS] __initdata;
  53
  54 module_param_array_named(map, gc[0].args, int, &gc[0].nargs, 0);
  55 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
  56 module_param_array_named(map2, gc[1].args, int, &gc[1].nargs, 0);
  57 MODULE_PARM_DESC(map2, "Describes second set of devices");
  58 module_param_array_named(map3, gc[2].args, int, &gc[2].nargs, 0);
  59 MODULE_PARM_DESC(map3, "Describes third set of devices");
  60
  61 __obsolete_setup("gc=");
  62 __obsolete_setup("gc_2=");
  63 __obsolete_setup("gc_3=");
  64
  65 /* see also gs_psx_delay parameter in PSX support section */
  66
  67 #define GC_SNES         1
  68 #define GC_NES          2
  69 #define GC_NES4         3
  70 #define GC_MULTI        4
  71 #define GC_MULTI2       5
  72 #define GC_N64          6
  73 #define GC_PSX          7
  74 #define GC_DDR          8
  75
  76 #define GC_MAX          8
  77
  78 #define GC_REFRESH_TIME HZ/100
  79
  80 struct gc {
  81         struct pardevice *pd;
  82         struct input_dev *dev[GC_MAX_DEVICES];
  83         struct timer_list timer;
  84         unsigned char pads[GC_MAX + 1];
  85         int used;
  86         struct semaphore sem;
  87         char phys[GC_MAX_DEVICES][32];
  88 };
  89
  90 static struct gc *gc_base[3];
  91
  92 static int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
  93
  94 static char *gc_names[] = { NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
  95                                 "Multisystem 2-button joystick", "N64 controller", "PSX controller",
  96                                 "PSX DDR controller" };
  97 /*
  98  * N64 support.
  99  */
 100
 101 static unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
 102 static short gc_n64_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START };
 103
 104 #define GC_N64_LENGTH           32              /* N64 bit length, not including stop bit */
 105 #define GC_N64_REQUEST_LENGTH   37              /* transmit request sequence is 9 bits long */
 106 #define GC_N64_DELAY            133             /* delay between transmit request, and response ready (us) */
 107 #define GC_N64_REQUEST          0x1dd1111111ULL /* the request data command (encoded for 000000011) */
 108 #define GC_N64_DWS              3               /* delay between write segments (required for sound playback because of ISA DMA) */
 109                                                 /* GC_N64_DWS > 24 is known to fail */
 110 #define GC_N64_POWER_W          0xe2            /* power during write (transmit request) */
 111 #define GC_N64_POWER_R          0xfd            /* power during read */
 112 #define GC_N64_OUT              0x1d            /* output bits to the 4 pads */
 113                                                 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
 114                                                 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
 115                                                 /* than 123 us */
 116 #define GC_N64_CLOCK            0x02            /* clock bits for read */
 117
 118 /*
 119  * gc_n64_read_packet() reads an N64 packet.
 120  * Each pad uses one bit per byte. So all pads connected to this port are read in parallel.
 121  */
 122
 123 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
 124 {
 125         int i;
 126         unsigned long flags;
 127
 128 /*
 129  * Request the pad to transmit data
 130  */
 131
 132         local_irq_save(flags);
 133         for (i = 0; i < GC_N64_REQUEST_LENGTH; i++) {
 134                 parport_write_data(gc->pd->port, GC_N64_POWER_W | ((GC_N64_REQUEST >> i) & 1 ? GC_N64_OUT : 0));
 135                 udelay(GC_N64_DWS);
 136         }
 137         local_irq_restore(flags);
 138
 139 /*
 140  * Wait for the pad response to be loaded into the 33-bit register of the adapter
 141  */
 142
 143         udelay(GC_N64_DELAY);
 144
 145 /*
 146  * Grab data (ignoring the last bit, which is a stop bit)
 147  */
 148
 149         for (i = 0; i < GC_N64_LENGTH; i++) {
 150                 parport_write_data(gc->pd->port, GC_N64_POWER_R);
 151                 data[i] = parport_read_status(gc->pd->port);
 152                 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
 153          }
 154
 155 /*
 156  * We must wait 200 ms here for the controller to reinitialize before the next read request.
 157  * No worries as long as gc_read is polled less frequently than this.
 158  */
 159
 160 }
 161
 162 static void gc_n64_process_packet(struct gc *gc)
 163 {
 164         unsigned char data[GC_N64_LENGTH];
 165         signed char axes[2];
 166         struct input_dev *dev;
 167         int i, j, s;
 168
 169         gc_n64_read_packet(gc, data);
 170
 171         for (i = 0; i < GC_MAX_DEVICES; i++) {
 172
 173                 dev = gc->dev[i];
 174                 if (!dev)
 175                         continue;
 176
 177                 s = gc_status_bit[i];
 178
 179                 if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {
 180
 181                         axes[0] = axes[1] = 0;
 182
 183                         for (j = 0; j < 8; j++) {
 184                                 if (data[23 - j] & s)
 185                                         axes[0] |= 1 << j;
 186                                 if (data[31 - j] & s)
 187                                         axes[1] |= 1 << j;
 188                         }
 189
 190                         input_report_abs(dev, ABS_X,  axes[0]);
 191                         input_report_abs(dev, ABS_Y, -axes[1]);
 192
 193                         input_report_abs(dev, ABS_HAT0X, !(s & data[6]) - !(s & data[7]));
 194                         input_report_abs(dev, ABS_HAT0Y, !(s & data[4]) - !(s & data[5]));
 195
 196                         for (j = 0; j < 10; j++)
 197                                 input_report_key(dev, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);
 198
 199                         input_sync(dev);
 200                 }
 201         }
 202 }
 203
 204 /*
 205  * NES/SNES support.
 206  */
 207
 208 #define GC_NES_DELAY    6       /* Delay between bits - 6us */
 209 #define GC_NES_LENGTH   8       /* The NES pads use 8 bits of data */
 210 #define GC_SNES_LENGTH  12      /* The SNES true length is 16, but the last 4 bits are unused */
 211
 212 #define GC_NES_POWER    0xfc
 213 #define GC_NES_CLOCK    0x01
 214 #define GC_NES_LATCH    0x02
 215
 216 static unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
 217 static unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
 218 static short gc_snes_btn[] = { BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR };
 219
 220 /*
 221  * gc_nes_read_packet() reads a NES/SNES packet.
 222  * Each pad uses one bit per byte. So all pads connected to
 223  * this port are read in parallel.
 224  */
 225
 226 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
 227 {
 228         int i;
 229
 230         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
 231         udelay(GC_NES_DELAY * 2);
 232         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 233
 234         for (i = 0; i < length; i++) {
 235                 udelay(GC_NES_DELAY);
 236                 parport_write_data(gc->pd->port, GC_NES_POWER);
 237                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 238                 udelay(GC_NES_DELAY);
 239                 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 240         }
 241 }
 242
 243 static void gc_nes_process_packet(struct gc *gc)
 244 {
 245         unsigned char data[GC_SNES_LENGTH];
 246         struct input_dev *dev;
 247         int i, j, s;
 248
 249         gc_nes_read_packet(gc, gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH, data);
 250
 251         for (i = 0; i < GC_MAX_DEVICES; i++) {
 252
 253                 dev = gc->dev[i];
 254                 if (!dev)
 255                         continue;
 256
 257                 s = gc_status_bit[i];
 258
 259                 if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
 260                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
 261                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
 262                 }
 263
 264                 if (s & gc->pads[GC_NES])
 265                         for (j = 0; j < 4; j++)
 266                                 input_report_key(dev, gc_snes_btn[j], s & data[gc_nes_bytes[j]]);
 267
 268                 if (s & gc->pads[GC_SNES])
 269                         for (j = 0; j < 8; j++)
 270                                 input_report_key(dev, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);
 271
 272                 input_sync(dev);
 273         }
 274 }
 275
 276 /*
 277  * Multisystem joystick support
 278  */
 279
 280 #define GC_MULTI_LENGTH         5       /* Multi system joystick packet length is 5 */
 281 #define GC_MULTI2_LENGTH        6       /* One more bit for one more button */
 282
 283 /*
 284  * gc_multi_read_packet() reads a Multisystem joystick packet.
 285  */
 286
 287 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
 288 {
 289         int i;
 290
 291         for (i = 0; i < length; i++) {
 292                 parport_write_data(gc->pd->port, ~(1 << i));
 293                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 294         }
 295 }
 296
 297 static void gc_multi_process_packet(struct gc *gc)
 298 {
 299         unsigned char data[GC_MULTI2_LENGTH];
 300         struct input_dev *dev;
 301         int i, s;
 302
 303         gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);
 304
 305         for (i = 0; i < GC_MAX_DEVICES; i++) {
 306
 307                 dev = gc->dev[i];
 308                 if (!dev)
 309                         continue;
 310
 311                 s = gc_status_bit[i];
 312
 313                 if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
 314                         input_report_abs(dev, ABS_X,  !(s & data[2]) - !(s & data[3]));
 315                         input_report_abs(dev, ABS_Y,  !(s & data[0]) - !(s & data[1]));
 316                         input_report_key(dev, BTN_TRIGGER, s & data[4]);
 317                 }
 318
 319                 if (s & gc->pads[GC_MULTI2])
 320                         input_report_key(dev, BTN_THUMB, s & data[5]);
 321
 322                 input_sync(dev);
 323         }
 324 }
 325
 326 /*
 327  * PSX support
 328  *
 329  * See documentation at:
 330  *      http://www.dim.com/~mackys/psxmemcard/ps-eng2.txt
 331  *      http://www.gamesx.com/controldata/psxcont/psxcont.htm
 332  *      ftp://milano.usal.es/pablo/
 333  *
 334  */
 335
 336 #define GC_PSX_DELAY    25              /* 25 usec */
 337 #define GC_PSX_LENGTH   8               /* talk to the controller in bits */
 338 #define GC_PSX_BYTES    6               /* the maximum number of bytes to read off the controller */
 339
 340 #define GC_PSX_MOUSE    1               /* Mouse */
 341 #define GC_PSX_NEGCON   2               /* NegCon */
 342 #define GC_PSX_NORMAL   4               /* Digital / Analog or Rumble in Digital mode  */
 343 #define GC_PSX_ANALOG   5               /* Analog in Analog mode / Rumble in Green mode */
 344 #define GC_PSX_RUMBLE   7               /* Rumble in Red mode */
 345
 346 #define GC_PSX_CLOCK    0x04            /* Pin 4 */
 347 #define GC_PSX_COMMAND  0x01            /* Pin 2 */
 348 #define GC_PSX_POWER    0xf8            /* Pins 5-9 */
 349 #define GC_PSX_SELECT   0x02            /* Pin 3 */
 350
 351 #define GC_PSX_ID(x)    ((x) >> 4)      /* High nibble is device type */
 352 #define GC_PSX_LEN(x)   (((x) & 0xf) << 1)      /* Low nibble is length in bytes/2 */
 353
 354 static int gc_psx_delay = GC_PSX_DELAY;
 355 module_param_named(psx_delay, gc_psx_delay, uint, 0);
 356 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
 357
 358 __obsolete_setup("gc_psx_delay=");
 359
 360 static short gc_psx_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y };
 361 static short gc_psx_btn[] = { BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
 362                                 BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR };
 363 static short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
 364
 365 /*
 366  * gc_psx_command() writes 8bit command and reads 8bit data from
 367  * the psx pad.
 368  */
 369
 370 static void gc_psx_command(struct gc *gc, int b, unsigned char data[GC_MAX_DEVICES])
 371 {
 372         int i, j, cmd, read;
 373
 374         for (i = 0; i < GC_MAX_DEVICES; i++)
 375                 data[i] = 0;
 376
 377         for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
 378                 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
 379                 parport_write_data(gc->pd->port, cmd | GC_PSX_POWER);
 380                 udelay(gc_psx_delay);
 381                 read = parport_read_status(gc->pd->port) ^ 0x80;
 382                 for (j = 0; j < GC_MAX_DEVICES; j++)
 383                         data[j] |= (read & gc_status_bit[j] & (gc->pads[GC_PSX] | gc->pads[GC_DDR])) ? (1 << i) : 0;
 384                 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
 385                 udelay(gc_psx_delay);
 386         }
 387 }
 388
 389 /*
 390  * gc_psx_read_packet() reads a whole psx packet and returns
 391  * device identifier code.
 392  */
 393
 394 static void gc_psx_read_packet(struct gc *gc, unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
 395                                unsigned char id[GC_MAX_DEVICES])
 396 {
 397         int i, j, max_len = 0;
 398         unsigned long flags;
 399         unsigned char data2[GC_MAX_DEVICES];
 400
 401         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);  /* Select pad */
 402         udelay(gc_psx_delay);
 403         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);                  /* Deselect, begin command */
 404         udelay(gc_psx_delay);
 405
 406         local_irq_save(flags);
 407
 408         gc_psx_command(gc, 0x01, data2);                                                /* Access pad */
 409         gc_psx_command(gc, 0x42, id);                                                   /* Get device ids */
 410         gc_psx_command(gc, 0, data2);                                                   /* Dump status */
 411
 412         for (i =0; i < GC_MAX_DEVICES; i++)                                                             /* Find the longest pad */
 413                 if((gc_status_bit[i] & (gc->pads[GC_PSX] | gc->pads[GC_DDR]))
 414                         && (GC_PSX_LEN(id[i]) > max_len)
 415                         && (GC_PSX_LEN(id[i]) <= GC_PSX_BYTES))
 416                         max_len = GC_PSX_LEN(id[i]);
 417
 418         for (i = 0; i < max_len; i++) {                                         /* Read in all the data */
 419                 gc_psx_command(gc, 0, data2);
 420                 for (j = 0; j < GC_MAX_DEVICES; j++)
 421                         data[j][i] = data2[j];
 422         }
 423
 424         local_irq_restore(flags);
 425
 426         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 427
 428         for(i = 0; i < GC_MAX_DEVICES; i++)                                                             /* Set id's to the real value */
 429                 id[i] = GC_PSX_ID(id[i]);
 430 }
 431
 432 static void gc_psx_process_packet(struct gc *gc)
 433 {
 434         unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
 435         unsigned char id[GC_MAX_DEVICES];
 436         struct input_dev *dev;
 437         int i, j;
 438
 439         gc_psx_read_packet(gc, data, id);
 440
 441         for (i = 0; i < GC_MAX_DEVICES; i++) {
 442
 443                 dev = gc->dev[i];
 444                 if (!dev)
 445                         continue;
 446
 447                 switch (id[i]) {
 448
 449                         case GC_PSX_RUMBLE:
 450
 451                                 input_report_key(dev, BTN_THUMBL, ~data[i][0] & 0x04);
 452                                 input_report_key(dev, BTN_THUMBR, ~data[i][0] & 0x02);
 453
 454                         case GC_PSX_NEGCON:
 455                         case GC_PSX_ANALOG:
 456
 457                                 if (gc->pads[GC_DDR] & gc_status_bit[i]) {
 458                                         for(j = 0; j < 4; j++)
 459                                                 input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
 460                                 } else {
 461                                         for (j = 0; j < 4; j++)
 462                                                 input_report_abs(dev, gc_psx_abs[j + 2], data[i][j + 2]);
 463
 464                                         input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
 465                                         input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
 466                                 }
 467
 468                                 for (j = 0; j < 8; j++)
 469                                         input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
 470
 471                                 input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
 472                                 input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
 473
 474                                 input_sync(dev);
 475
 476                                 break;
 477
 478                         case GC_PSX_NORMAL:
 479                                 if (gc->pads[GC_DDR] & gc_status_bit[i]) {
 480                                         for(j = 0; j < 4; j++)
 481                                                 input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
 482                                 } else {
 483                                         input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
 484                                         input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
 485
 486                                         /* for some reason if the extra axes are left unset they drift */
 487                                         /* for (j = 0; j < 4; j++)
 488                                                 input_report_abs(dev, gc_psx_abs[j + 2], 128);
 489                                          * This needs to be debugged properly,
 490                                          * maybe fuzz processing needs to be done in input_sync()
 491                                          *                               --vojtech
 492                                          */
 493                                 }
 494
 495                                 for (j = 0; j < 8; j++)
 496                                         input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
 497
 498                                 input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
 499                                 input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
 500
 501                                 input_sync(dev);
 502
 503                                 break;
 504
 505                         case 0: /* not a pad, ignore */
 506                                 break;
 507                 }
 508         }
 509 }
 510
 511 /*
 512  * gc_timer() initiates reads of console pads data.
 513  */
 514
 515 static void gc_timer(unsigned long private)
 516 {
 517         struct gc *gc = (void *) private;
 518
 519 /*
 520  * N64 pads - must be read first, any read confuses them for 200 us
 521  */
 522
 523         if (gc->pads[GC_N64])
 524                 gc_n64_process_packet(gc);
 525
 526 /*
 527  * NES and SNES pads
 528  */
 529
 530         if (gc->pads[GC_NES] || gc->pads[GC_SNES])
 531                 gc_nes_process_packet(gc);
 532
 533 /*
 534  * Multi and Multi2 joysticks
 535  */
 536
 537         if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2])
 538                 gc_multi_process_packet(gc);
 539
 540 /*
 541  * PSX controllers
 542  */
 543
 544         if (gc->pads[GC_PSX] || gc->pads[GC_DDR])
 545                 gc_psx_process_packet(gc);
 546
 547         mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 548 }
 549
 550 static int gc_open(struct input_dev *dev)
 551 {
 552         struct gc *gc = dev->private;
 553         int err;
 554
 555         err = down_interruptible(&gc->sem);
 556         if (err)
 557                 return err;
 558
 559         if (!gc->used++) {
 560                 parport_claim(gc->pd);
 561                 parport_write_control(gc->pd->port, 0x04);
 562                 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 563         }
 564
 565         up(&gc->sem);
 566         return 0;
 567 }
 568
 569 static void gc_close(struct input_dev *dev)
 570 {
 571         struct gc *gc = dev->private;
 572
 573         down(&gc->sem);
 574         if (!--gc->used) {
 575                 del_timer_sync(&gc->timer);
 576                 parport_write_control(gc->pd->port, 0x00);
 577                 parport_release(gc->pd);
 578         }
 579         up(&gc->sem);
 580 }
 581
 582 static int __init gc_setup_pad(struct gc *gc, int idx, int pad_type)
 583 {
 584         struct input_dev *input_dev;
 585         int i;
 586
 587         if (!pad_type)
 588                 return 0;
 589
 590         if (pad_type < 1 || pad_type > GC_MAX) {
 591                 printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", pad_type);
 592                 return -EINVAL;
 593         }
 594
 595         gc->dev[idx] = input_dev = input_allocate_device();
 596         if (!input_dev) {
 597                 printk(KERN_ERR "gamecon.c: Not enough memory for input device\n");
 598                 return -ENOMEM;
 599         }
 600
 601         input_dev->name = gc_names[pad_type];
 602         input_dev->phys = gc->phys[idx];
 603         input_dev->id.bustype = BUS_PARPORT;
 604         input_dev->id.vendor = 0x0001;
 605         input_dev->id.product = pad_type;
 606         input_dev->id.version = 0x0100;
 607         input_dev->private = gc;
 608
 609         input_dev->open = gc_open;
 610         input_dev->close = gc_close;
 611
 612         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 613
 614         for (i = 0; i < 2; i++)
 615                 input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
 616
 617         gc->pads[0] |= gc_status_bit[idx];
 618         gc->pads[pad_type] |= gc_status_bit[idx];
 619
 620         switch (pad_type) {
 621
 622                 case GC_N64:
 623                         for (i = 0; i < 10; i++)
 624                                 set_bit(gc_n64_btn[i], input_dev->keybit);
 625
 626                         for (i = 0; i < 2; i++) {
 627                                 input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
 628                                 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 629                         }
 630
 631                         break;
 632
 633                 case GC_SNES:
 634                         for (i = 4; i < 8; i++)
 635                                 set_bit(gc_snes_btn[i], input_dev->keybit);
 636                 case GC_NES:
 637                         for (i = 0; i < 4; i++)
 638                                 set_bit(gc_snes_btn[i], input_dev->keybit);
 639                         break;
 640
 641                 case GC_MULTI2:
 642                         set_bit(BTN_THUMB, input_dev->keybit);
 643                 case GC_MULTI:
 644                         set_bit(BTN_TRIGGER, input_dev->keybit);
 645                         break;
 646
 647                 case GC_PSX:
 648                         for (i = 0; i < 6; i++)
 649                                 input_set_abs_params(input_dev, gc_psx_abs[i], 4, 252, 0, 2);
 650                         for (i = 0; i < 12; i++)
 651                                 set_bit(gc_psx_btn[i], input_dev->keybit);
 652
 653                         break;
 654
 655                 case GC_DDR:
 656                         for (i = 0; i < 4; i++)
 657                                 set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
 658                         for (i = 0; i < 12; i++)
 659                                 set_bit(gc_psx_btn[i], input_dev->keybit);
 660
 661                         break;
 662         }
 663
 664         return 0;
 665 }
 666
 667 static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
 668 {
 669         struct gc *gc;
 670         struct parport *pp;
 671         struct pardevice *pd;
 672         int i;
 673         int err;
 674
 675         pp = parport_find_number(parport);
 676         if (!pp) {
 677                 printk(KERN_ERR "gamecon.c: no such parport\n");
 678                 err = -EINVAL;
 679                 goto err_out;
 680         }
 681
 682         pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
 683         if (!pd) {
 684                 printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
 685                 err = -EBUSY;
 686                 goto err_put_pp;
 687         }
 688
 689         gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
 690         if (!gc) {
 691                 printk(KERN_ERR "gamecon.c: Not enough memory\n");
 692                 err = -ENOMEM;
 693                 goto err_unreg_pardev;
 694         }
 695
 696         init_MUTEX(&gc->sem);
 697         gc->pd = pd;
 698         init_timer(&gc->timer);
 699         gc->timer.data = (long) gc;
 700         gc->timer.function = gc_timer;
 701
 702         for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
 703                 if (!pads[i])
 704                         continue;
 705
 706                 sprintf(gc->phys[i], "%s/input%d", gc->pd->port->name, i);
 707                 err = gc_setup_pad(gc, i, pads[i]);
 708                 if (err)
 709                         goto err_unreg_devs;
 710
 711                 err = input_register_device(gc->dev[i]);
 712                 if (err)
 713                         goto err_free_dev;
 714         }
 715
 716         if (!gc->pads[0]) {
 717                 printk(KERN_ERR "gamecon.c: No valid devices specified\n");
 718                 err = -EINVAL;
 719                 goto err_free_gc;
 720         }
 721
 722         parport_put_port(pp);
 723         return gc;
 724
 725  err_free_dev:
 726         input_free_device(gc->dev[i]);
 727  err_unreg_devs:
 728         while (--i >= 0)
 729                 if (gc->dev[i])
 730                         input_unregister_device(gc->dev[i]);
 731  err_free_gc:
 732         kfree(gc);
 733  err_unreg_pardev:
 734         parport_unregister_device(pd);
 735  err_put_pp:
 736         parport_put_port(pp);
 737  err_out:
 738         return ERR_PTR(err);
 739 }
 740
 741 static void gc_remove(struct gc *gc)
 742 {
 743         int i;
 744
 745         for (i = 0; i < GC_MAX_DEVICES; i++)
 746                 if (gc->dev[i])
 747                         input_unregister_device(gc->dev[i]);
 748         parport_unregister_device(gc->pd);
 749         kfree(gc);
 750 }
 751
 752 static int __init gc_init(void)
 753 {
 754         int i;
 755         int have_dev = 0;
 756         int err = 0;
 757
 758         for (i = 0; i < GC_MAX_PORTS; i++) {
 759                 if (gc[i].nargs == 0 || gc[i].args[0] < 0)
 760                         continue;
 761
 762                 if (gc[i].nargs < 2) {
 763                         printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
 764                         err = -EINVAL;
 765                         break;
 766                 }
 767
 768                 gc_base[i] = gc_probe(gc[i].args[0], gc[i].args + 1, gc[i].nargs - 1);
 769                 if (IS_ERR(gc_base[i])) {
 770                         err = PTR_ERR(gc_base[i]);
 771                         break;
 772                 }
 773
 774                 have_dev = 1;
 775         }
 776
 777         if (err) {
 778                 while (--i >= 0)
 779                         if (gc_base[i])
 780                                 gc_remove(gc_base[i]);
 781                 return err;
 782         }
 783
 784         return have_dev ? 0 : -ENODEV;
 785 }
 786
 787 static void __exit gc_exit(void)
 788 {
 789         int i;
 790
 791         for (i = 0; i < GC_MAX_PORTS; i++)
 792                 if (gc_base[i])
 793                         gc_remove(gc_base[i]);
 794 }
 795
 796 module_init(gc_init);
 797 module_exit(gc_exit);