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 static int gc[] __initdata = { -1, 0, 0, 0, 0, 0 };
  45 static int gc_nargs __initdata = 0;
  46 module_param_array_named(map, gc, int, &gc_nargs, 0);
  47 MODULE_PARM_DESC(map, "Describers first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
  48
  49 static int gc_2[] __initdata = { -1, 0, 0, 0, 0, 0 };
  50 static int gc_nargs_2 __initdata = 0;
  51 module_param_array_named(map2, gc_2, int, &gc_nargs_2, 0);
  52 MODULE_PARM_DESC(map2, "Describers second set of devices");
  53
  54 static int gc_3[] __initdata = { -1, 0, 0, 0, 0, 0 };
  55 static int gc_nargs_3 __initdata = 0;
  56 module_param_array_named(map3, gc_3, int, &gc_nargs_3, 0);
  57 MODULE_PARM_DESC(map3, "Describers third set of devices");
  58
  59 __obsolete_setup("gc=");
  60 __obsolete_setup("gc_2=");
  61 __obsolete_setup("gc_3=");
  62
  63 /* see also gs_psx_delay parameter in PSX support section */
  64
  65 #define GC_SNES         1
  66 #define GC_NES          2
  67 #define GC_NES4         3
  68 #define GC_MULTI        4
  69 #define GC_MULTI2       5
  70 #define GC_N64          6
  71 #define GC_PSX          7
  72 #define GC_DDR          8
  73
  74 #define GC_MAX          8
  75
  76 #define GC_REFRESH_TIME HZ/100
  77
  78 struct gc {
  79         struct pardevice *pd;
  80         struct input_dev dev[5];
  81         struct timer_list timer;
  82         unsigned char pads[GC_MAX + 1];
  83         int used;
  84         struct semaphore sem;
  85         char phys[5][32];
  86 };
  87
  88 static struct gc *gc_base[3];
  89
  90 static int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
  91
  92 static char *gc_names[] = { NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
  93                                 "Multisystem 2-button joystick", "N64 controller", "PSX controller",
  94                                 "PSX DDR controller" };
  95 /*
  96  * N64 support.
  97  */
  98
  99 static unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
 100 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 };
 101
 102 #define GC_N64_LENGTH           32              /* N64 bit length, not including stop bit */
 103 #define GC_N64_REQUEST_LENGTH   37              /* transmit request sequence is 9 bits long */
 104 #define GC_N64_DELAY            133             /* delay between transmit request, and response ready (us) */
 105 #define GC_N64_REQUEST          0x1dd1111111ULL /* the request data command (encoded for 000000011) */
 106 #define GC_N64_DWS              3               /* delay between write segments (required for sound playback because of ISA DMA) */
 107                                                 /* GC_N64_DWS > 24 is known to fail */
 108 #define GC_N64_POWER_W          0xe2            /* power during write (transmit request) */
 109 #define GC_N64_POWER_R          0xfd            /* power during read */
 110 #define GC_N64_OUT              0x1d            /* output bits to the 4 pads */
 111                                                 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
 112                                                 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
 113                                                 /* than 123 us */
 114 #define GC_N64_CLOCK            0x02            /* clock bits for read */
 115
 116 /*
 117  * gc_n64_read_packet() reads an N64 packet.
 118  * Each pad uses one bit per byte. So all pads connected to this port are read in parallel.
 119  */
 120
 121 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
 122 {
 123         int i;
 124         unsigned long flags;
 125
 126 /*
 127  * Request the pad to transmit data
 128  */
 129
 130         local_irq_save(flags);
 131         for (i = 0; i < GC_N64_REQUEST_LENGTH; i++) {
 132                 parport_write_data(gc->pd->port, GC_N64_POWER_W | ((GC_N64_REQUEST >> i) & 1 ? GC_N64_OUT : 0));
 133                 udelay(GC_N64_DWS);
 134         }
 135         local_irq_restore(flags);
 136
 137 /*
 138  * Wait for the pad response to be loaded into the 33-bit register of the adapter
 139  */
 140
 141         udelay(GC_N64_DELAY);
 142
 143 /*
 144  * Grab data (ignoring the last bit, which is a stop bit)
 145  */
 146
 147         for (i = 0; i < GC_N64_LENGTH; i++) {
 148                 parport_write_data(gc->pd->port, GC_N64_POWER_R);
 149                 data[i] = parport_read_status(gc->pd->port);
 150                 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
 151          }
 152
 153 /*
 154  * We must wait 200 ms here for the controller to reinitialize before the next read request.
 155  * No worries as long as gc_read is polled less frequently than this.
 156  */
 157
 158 }
 159
 160 /*
 161  * NES/SNES support.
 162  */
 163
 164 #define GC_NES_DELAY    6       /* Delay between bits - 6us */
 165 #define GC_NES_LENGTH   8       /* The NES pads use 8 bits of data */
 166 #define GC_SNES_LENGTH  12      /* The SNES true length is 16, but the last 4 bits are unused */
 167
 168 #define GC_NES_POWER    0xfc
 169 #define GC_NES_CLOCK    0x01
 170 #define GC_NES_LATCH    0x02
 171
 172 static unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
 173 static unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
 174 static short gc_snes_btn[] = { BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR };
 175
 176 /*
 177  * gc_nes_read_packet() reads a NES/SNES packet.
 178  * Each pad uses one bit per byte. So all pads connected to
 179  * this port are read in parallel.
 180  */
 181
 182 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
 183 {
 184         int i;
 185
 186         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
 187         udelay(GC_NES_DELAY * 2);
 188         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 189
 190         for (i = 0; i < length; i++) {
 191                 udelay(GC_NES_DELAY);
 192                 parport_write_data(gc->pd->port, GC_NES_POWER);
 193                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 194                 udelay(GC_NES_DELAY);
 195                 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 196         }
 197 }
 198
 199 /*
 200  * Multisystem joystick support
 201  */
 202
 203 #define GC_MULTI_LENGTH         5       /* Multi system joystick packet length is 5 */
 204 #define GC_MULTI2_LENGTH        6       /* One more bit for one more button */
 205
 206 /*
 207  * gc_multi_read_packet() reads a Multisystem joystick packet.
 208  */
 209
 210 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
 211 {
 212         int i;
 213
 214         for (i = 0; i < length; i++) {
 215                 parport_write_data(gc->pd->port, ~(1 << i));
 216                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 217         }
 218 }
 219
 220 /*
 221  * PSX support
 222  *
 223  * See documentation at:
 224  *      http://www.dim.com/~mackys/psxmemcard/ps-eng2.txt
 225  *      http://www.gamesx.com/controldata/psxcont/psxcont.htm
 226  *      ftp://milano.usal.es/pablo/
 227  *
 228  */
 229
 230 #define GC_PSX_DELAY    25              /* 25 usec */
 231 #define GC_PSX_LENGTH   8               /* talk to the controller in bits */
 232 #define GC_PSX_BYTES    6               /* the maximum number of bytes to read off the controller */
 233
 234 #define GC_PSX_MOUSE    1               /* Mouse */
 235 #define GC_PSX_NEGCON   2               /* NegCon */
 236 #define GC_PSX_NORMAL   4               /* Digital / Analog or Rumble in Digital mode  */
 237 #define GC_PSX_ANALOG   5               /* Analog in Analog mode / Rumble in Green mode */
 238 #define GC_PSX_RUMBLE   7               /* Rumble in Red mode */
 239
 240 #define GC_PSX_CLOCK    0x04            /* Pin 4 */
 241 #define GC_PSX_COMMAND  0x01            /* Pin 2 */
 242 #define GC_PSX_POWER    0xf8            /* Pins 5-9 */
 243 #define GC_PSX_SELECT   0x02            /* Pin 3 */
 244
 245 #define GC_PSX_ID(x)    ((x) >> 4)      /* High nibble is device type */
 246 #define GC_PSX_LEN(x)   (((x) & 0xf) << 1)      /* Low nibble is length in bytes/2 */
 247
 248 static int gc_psx_delay = GC_PSX_DELAY;
 249 module_param_named(psx_delay, gc_psx_delay, uint, 0);
 250 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
 251
 252 __obsolete_setup("gc_psx_delay=");
 253
 254 static short gc_psx_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y };
 255 static short gc_psx_btn[] = { BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
 256                                 BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR };
 257 static short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
 258
 259 /*
 260  * gc_psx_command() writes 8bit command and reads 8bit data from
 261  * the psx pad.
 262  */
 263
 264 static void gc_psx_command(struct gc *gc, int b, unsigned char data[5])
 265 {
 266         int i, j, cmd, read;
 267         for (i = 0; i < 5; i++)
 268                 data[i] = 0;
 269
 270         for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
 271                 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
 272                 parport_write_data(gc->pd->port, cmd | GC_PSX_POWER);
 273                 udelay(gc_psx_delay);
 274                 read = parport_read_status(gc->pd->port) ^ 0x80;
 275                 for (j = 0; j < 5; j++)
 276                         data[j] |= (read & gc_status_bit[j] & (gc->pads[GC_PSX] | gc->pads[GC_DDR])) ? (1 << i) : 0;
 277                 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
 278                 udelay(gc_psx_delay);
 279         }
 280 }
 281
 282 /*
 283  * gc_psx_read_packet() reads a whole psx packet and returns
 284  * device identifier code.
 285  */
 286
 287 static void gc_psx_read_packet(struct gc *gc, unsigned char data[5][GC_PSX_BYTES], unsigned char id[5])
 288 {
 289         int i, j, max_len = 0;
 290         unsigned long flags;
 291         unsigned char data2[5];
 292
 293         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);  /* Select pad */
 294         udelay(gc_psx_delay);
 295         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);                  /* Deselect, begin command */
 296         udelay(gc_psx_delay);
 297
 298         local_irq_save(flags);
 299
 300         gc_psx_command(gc, 0x01, data2);                                                /* Access pad */
 301         gc_psx_command(gc, 0x42, id);                                                   /* Get device ids */
 302         gc_psx_command(gc, 0, data2);                                                   /* Dump status */
 303
 304         for (i =0; i < 5; i++)                                                          /* Find the longest pad */
 305                 if((gc_status_bit[i] & (gc->pads[GC_PSX] | gc->pads[GC_DDR]))
 306                         && (GC_PSX_LEN(id[i]) > max_len)
 307                         && (GC_PSX_LEN(id[i]) <= GC_PSX_BYTES))
 308                         max_len = GC_PSX_LEN(id[i]);
 309
 310         for (i = 0; i < max_len; i++) {                                         /* Read in all the data */
 311                 gc_psx_command(gc, 0, data2);
 312                 for (j = 0; j < 5; j++)
 313                         data[j][i] = data2[j];
 314         }
 315
 316         local_irq_restore(flags);
 317
 318         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 319
 320         for(i = 0; i < 5; i++)                                                          /* Set id's to the real value */
 321                 id[i] = GC_PSX_ID(id[i]);
 322 }
 323
 324 /*
 325  * gc_timer() reads and analyzes console pads data.
 326  */
 327
 328 #define GC_MAX_LENGTH GC_N64_LENGTH
 329
 330 static void gc_timer(unsigned long private)
 331 {
 332         struct gc *gc = (void *) private;
 333         struct input_dev *dev = gc->dev;
 334         unsigned char data[GC_MAX_LENGTH];
 335         unsigned char data_psx[5][GC_PSX_BYTES];
 336         int i, j, s;
 337
 338 /*
 339  * N64 pads - must be read first, any read confuses them for 200 us
 340  */
 341
 342         if (gc->pads[GC_N64]) {
 343
 344                 gc_n64_read_packet(gc, data);
 345
 346                 for (i = 0; i < 5; i++) {
 347
 348                         s = gc_status_bit[i];
 349
 350                         if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {
 351
 352                                 signed char axes[2];
 353                                 axes[0] = axes[1] = 0;
 354
 355                                 for (j = 0; j < 8; j++) {
 356                                         if (data[23 - j] & s) axes[0] |= 1 << j;
 357                                         if (data[31 - j] & s) axes[1] |= 1 << j;
 358                                 }
 359
 360                                 input_report_abs(dev + i, ABS_X,  axes[0]);
 361                                 input_report_abs(dev + i, ABS_Y, -axes[1]);
 362
 363                                 input_report_abs(dev + i, ABS_HAT0X, !(s & data[6]) - !(s & data[7]));
 364                                 input_report_abs(dev + i, ABS_HAT0Y, !(s & data[4]) - !(s & data[5]));
 365
 366                                 for (j = 0; j < 10; j++)
 367                                         input_report_key(dev + i, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);
 368
 369                                 input_sync(dev + i);
 370                         }
 371                 }
 372         }
 373
 374 /*
 375  * NES and SNES pads
 376  */
 377
 378         if (gc->pads[GC_NES] || gc->pads[GC_SNES]) {
 379
 380                 gc_nes_read_packet(gc, gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH, data);
 381
 382                 for (i = 0; i < 5; i++) {
 383
 384                         s = gc_status_bit[i];
 385
 386                         if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
 387                                 input_report_abs(dev + i, ABS_X, !(s & data[6]) - !(s & data[7]));
 388                                 input_report_abs(dev + i, ABS_Y, !(s & data[4]) - !(s & data[5]));
 389                         }
 390
 391                         if (s & gc->pads[GC_NES])
 392                                 for (j = 0; j < 4; j++)
 393                                         input_report_key(dev + i, gc_snes_btn[j], s & data[gc_nes_bytes[j]]);
 394
 395                         if (s & gc->pads[GC_SNES])
 396                                 for (j = 0; j < 8; j++)
 397                                         input_report_key(dev + i, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);
 398
 399                         input_sync(dev + i);
 400                 }
 401         }
 402
 403 /*
 404  * Multi and Multi2 joysticks
 405  */
 406
 407         if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2]) {
 408
 409                 gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);
 410
 411                 for (i = 0; i < 5; i++) {
 412
 413                         s = gc_status_bit[i];
 414
 415                         if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
 416                                 input_report_abs(dev + i, ABS_X,  !(s & data[2]) - !(s & data[3]));
 417                                 input_report_abs(dev + i, ABS_Y,  !(s & data[0]) - !(s & data[1]));
 418                                 input_report_key(dev + i, BTN_TRIGGER, s & data[4]);
 419                         }
 420
 421                         if (s & gc->pads[GC_MULTI2])
 422                                 input_report_key(dev + i, BTN_THUMB, s & data[5]);
 423
 424                         input_sync(dev + i);
 425                 }
 426         }
 427
 428 /*
 429  * PSX controllers
 430  */
 431
 432         if (gc->pads[GC_PSX] || gc->pads[GC_DDR]) {
 433
 434                 gc_psx_read_packet(gc, data_psx, data);
 435
 436                 for (i = 0; i < 5; i++) {
 437                         switch (data[i]) {
 438
 439                                 case GC_PSX_RUMBLE:
 440
 441                                         input_report_key(dev + i, BTN_THUMBL, ~data_psx[i][0] & 0x04);
 442                                         input_report_key(dev + i, BTN_THUMBR, ~data_psx[i][0] & 0x02);
 443
 444                                 case GC_PSX_NEGCON:
 445                                 case GC_PSX_ANALOG:
 446
 447                                         if(gc->pads[GC_DDR] & gc_status_bit[i]) {
 448                                                 for(j = 0; j < 4; j++)
 449                                                         input_report_key(dev + i, gc_psx_ddr_btn[j], ~data_psx[i][0] & (0x10 << j));
 450                                         } else {
 451                                                 for (j = 0; j < 4; j++)
 452                                                         input_report_abs(dev + i, gc_psx_abs[j+2], data_psx[i][j + 2]);
 453
 454                                                 input_report_abs(dev + i, ABS_X, 128 + !(data_psx[i][0] & 0x20) * 127 - !(data_psx[i][0] & 0x80) * 128);
 455                                                 input_report_abs(dev + i, ABS_Y, 128 + !(data_psx[i][0] & 0x40) * 127 - !(data_psx[i][0] & 0x10) * 128);
 456                                         }
 457
 458                                         for (j = 0; j < 8; j++)
 459                                                 input_report_key(dev + i, gc_psx_btn[j], ~data_psx[i][1] & (1 << j));
 460
 461                                         input_report_key(dev + i, BTN_START,  ~data_psx[i][0] & 0x08);
 462                                         input_report_key(dev + i, BTN_SELECT, ~data_psx[i][0] & 0x01);
 463
 464                                         input_sync(dev + i);
 465
 466                                         break;
 467
 468                                 case GC_PSX_NORMAL:
 469                                         if(gc->pads[GC_DDR] & gc_status_bit[i]) {
 470                                                 for(j = 0; j < 4; j++)
 471                                                         input_report_key(dev + i, gc_psx_ddr_btn[j], ~data_psx[i][0] & (0x10 << j));
 472                                         } else {
 473                                                 input_report_abs(dev + i, ABS_X, 128 + !(data_psx[i][0] & 0x20) * 127 - !(data_psx[i][0] & 0x80) * 128);
 474                                                 input_report_abs(dev + i, ABS_Y, 128 + !(data_psx[i][0] & 0x40) * 127 - !(data_psx[i][0] & 0x10) * 128);
 475
 476                                                 /* for some reason if the extra axes are left unset they drift */
 477                                                 /* for (j = 0; j < 4; j++)
 478                                                         input_report_abs(dev + i, gc_psx_abs[j+2], 128);
 479                                                  * This needs to be debugged properly,
 480                                                  * maybe fuzz processing needs to be done in input_sync()
 481                                                  *                               --vojtech
 482                                                  */
 483                                         }
 484
 485                                         for (j = 0; j < 8; j++)
 486                                                 input_report_key(dev + i, gc_psx_btn[j], ~data_psx[i][1] & (1 << j));
 487
 488                                         input_report_key(dev + i, BTN_START,  ~data_psx[i][0] & 0x08);
 489                                         input_report_key(dev + i, BTN_SELECT, ~data_psx[i][0] & 0x01);
 490
 491                                         input_sync(dev + i);
 492
 493                                         break;
 494
 495                                 case 0: /* not a pad, ignore */
 496                                         break;
 497                         }
 498                 }
 499         }
 500
 501         mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 502 }
 503
 504 static int gc_open(struct input_dev *dev)
 505 {
 506         struct gc *gc = dev->private;
 507         int err;
 508
 509         err = down_interruptible(&gc->sem);
 510         if (err)
 511                 return err;
 512
 513         if (!gc->used++) {
 514                 parport_claim(gc->pd);
 515                 parport_write_control(gc->pd->port, 0x04);
 516                 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 517         }
 518
 519         up(&gc->sem);
 520         return 0;
 521 }
 522
 523 static void gc_close(struct input_dev *dev)
 524 {
 525         struct gc *gc = dev->private;
 526
 527         down(&gc->sem);
 528         if (!--gc->used) {
 529                 del_timer_sync(&gc->timer);
 530                 parport_write_control(gc->pd->port, 0x00);
 531                 parport_release(gc->pd);
 532         }
 533         up(&gc->sem);
 534 }
 535
 536 static struct gc __init *gc_probe(int *config, int nargs)
 537 {
 538         struct gc *gc;
 539         struct parport *pp;
 540         int i, j;
 541
 542         if (config[0] < 0)
 543                 return NULL;
 544
 545         if (nargs < 2) {
 546                 printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
 547                 return NULL;
 548         }
 549
 550         pp = parport_find_number(config[0]);
 551
 552         if (!pp) {
 553                 printk(KERN_ERR "gamecon.c: no such parport\n");
 554                 return NULL;
 555         }
 556
 557         if (!(gc = kzalloc(sizeof(struct gc), GFP_KERNEL))) {
 558                 parport_put_port(pp);
 559                 return NULL;
 560         }
 561
 562         init_MUTEX(&gc->sem);
 563
 564         gc->pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
 565
 566         parport_put_port(pp);
 567
 568         if (!gc->pd) {
 569                 printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
 570                 kfree(gc);
 571                 return NULL;
 572         }
 573
 574         parport_claim(gc->pd);
 575
 576         init_timer(&gc->timer);
 577         gc->timer.data = (long) gc;
 578         gc->timer.function = gc_timer;
 579
 580         for (i = 0; i < nargs - 1; i++) {
 581
 582                 if (!config[i + 1])
 583                         continue;
 584
 585                 if (config[i + 1] < 1 || config[i + 1] > GC_MAX) {
 586                         printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", config[i + 1]);
 587                         continue;
 588                 }
 589
 590                 gc->dev[i].private = gc;
 591                 gc->dev[i].open = gc_open;
 592                 gc->dev[i].close = gc_close;
 593
 594                 gc->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 595
 596                 for (j = 0; j < 2; j++) {
 597                         set_bit(ABS_X + j, gc->dev[i].absbit);
 598                         gc->dev[i].absmin[ABS_X + j] = -1;
 599                         gc->dev[i].absmax[ABS_X + j] =  1;
 600                 }
 601
 602                 gc->pads[0] |= gc_status_bit[i];
 603                 gc->pads[config[i + 1]] |= gc_status_bit[i];
 604
 605                 switch(config[i + 1]) {
 606
 607                         case GC_N64:
 608                                 for (j = 0; j < 10; j++)
 609                                         set_bit(gc_n64_btn[j], gc->dev[i].keybit);
 610
 611                                 for (j = 0; j < 2; j++) {
 612                                         set_bit(ABS_X + j, gc->dev[i].absbit);
 613                                         gc->dev[i].absmin[ABS_X + j] = -127;
 614                                         gc->dev[i].absmax[ABS_X + j] =  126;
 615                                         gc->dev[i].absflat[ABS_X + j] = 2;
 616                                         set_bit(ABS_HAT0X + j, gc->dev[i].absbit);
 617                                         gc->dev[i].absmin[ABS_HAT0X + j] = -1;
 618                                         gc->dev[i].absmax[ABS_HAT0X + j] =  1;
 619                                 }
 620
 621                                 break;
 622
 623                         case GC_SNES:
 624                                 for (j = 4; j < 8; j++)
 625                                         set_bit(gc_snes_btn[j], gc->dev[i].keybit);
 626                         case GC_NES:
 627                                 for (j = 0; j < 4; j++)
 628                                         set_bit(gc_snes_btn[j], gc->dev[i].keybit);
 629                                 break;
 630
 631                         case GC_MULTI2:
 632                                 set_bit(BTN_THUMB, gc->dev[i].keybit);
 633                         case GC_MULTI:
 634                                 set_bit(BTN_TRIGGER, gc->dev[i].keybit);
 635                                 break;
 636
 637                         case GC_PSX:
 638                         case GC_DDR:
 639                                 if(config[i + 1] == GC_DDR) {
 640                                         for (j = 0; j < 4; j++)
 641                                                 set_bit(gc_psx_ddr_btn[j], gc->dev[i].keybit);
 642                                 } else {
 643                                         for (j = 0; j < 6; j++) {
 644                                                 set_bit(gc_psx_abs[j], gc->dev[i].absbit);
 645                                                 gc->dev[i].absmin[gc_psx_abs[j]] = 4;
 646                                                 gc->dev[i].absmax[gc_psx_abs[j]] = 252;
 647                                                 gc->dev[i].absflat[gc_psx_abs[j]] = 2;
 648                                         }
 649                                 }
 650
 651                                 for (j = 0; j < 12; j++)
 652                                         set_bit(gc_psx_btn[j], gc->dev[i].keybit);
 653
 654                                 break;
 655                 }
 656
 657                 sprintf(gc->phys[i], "%s/input%d", gc->pd->port->name, i);
 658
 659                 gc->dev[i].name = gc_names[config[i + 1]];
 660                 gc->dev[i].phys = gc->phys[i];
 661                 gc->dev[i].id.bustype = BUS_PARPORT;
 662                 gc->dev[i].id.vendor = 0x0001;
 663                 gc->dev[i].id.product = config[i + 1];
 664                 gc->dev[i].id.version = 0x0100;
 665         }
 666
 667         parport_release(gc->pd);
 668
 669         if (!gc->pads[0]) {
 670                 parport_unregister_device(gc->pd);
 671                 kfree(gc);
 672                 return NULL;
 673         }
 674
 675         for (i = 0; i < 5; i++)
 676                 if (gc->pads[0] & gc_status_bit[i]) {
 677                         input_register_device(gc->dev + i);
 678                         printk(KERN_INFO "input: %s on %s\n", gc->dev[i].name, gc->pd->port->name);
 679                 }
 680
 681         return gc;
 682 }
 683
 684 static int __init gc_init(void)
 685 {
 686         gc_base[0] = gc_probe(gc, gc_nargs);
 687         gc_base[1] = gc_probe(gc_2, gc_nargs_2);
 688         gc_base[2] = gc_probe(gc_3, gc_nargs_3);
 689
 690         if (gc_base[0] || gc_base[1] || gc_base[2])
 691                 return 0;
 692
 693         return -ENODEV;
 694 }
 695
 696 static void __exit gc_exit(void)
 697 {
 698         int i, j;
 699
 700         for (i = 0; i < 3; i++)
 701                 if (gc_base[i]) {
 702                         for (j = 0; j < 5; j++)
 703                                 if (gc_base[i]->pads[0] & gc_status_bit[j])
 704                                         input_unregister_device(gc_base[i]->dev + j);
 705                         parport_unregister_device(gc_base[i]->pd);
 706                 }
 707 }
 708
 709 module_init(gc_init);
 710 module_exit(gc_exit);