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