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  *      Raphael Assenat
  11  */
  12
  13 /*
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  27  *
  28  * Should you need to contact me, the author, you can do so either by
  29  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  30  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  31  */
  32
  33 #include <linux/kernel.h>
  34 #include <linux/delay.h>
  35 #include <linux/module.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/init.h>
  38 #include <linux/parport.h>
  39 #include <linux/input.h>
  40 #include <linux/mutex.h>
  41
  42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  43 MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
  44 MODULE_LICENSE("GPL");
  45
  46 #define GC_MAX_PORTS            3
  47 #define GC_MAX_DEVICES          5
  48
  49 struct gc_config {
  50         int args[GC_MAX_DEVICES + 1];
  51         int nargs;
  52 };
  53
  54 static struct gc_config gc[GC_MAX_PORTS] __initdata;
  55
  56 module_param_array_named(map, gc[0].args, int, &gc[0].nargs, 0);
  57 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
  58 module_param_array_named(map2, gc[1].args, int, &gc[1].nargs, 0);
  59 MODULE_PARM_DESC(map2, "Describes second set of devices");
  60 module_param_array_named(map3, gc[2].args, int, &gc[2].nargs, 0);
  61 MODULE_PARM_DESC(map3, "Describes third set of devices");
  62
  63 __obsolete_setup("gc=");
  64 __obsolete_setup("gc_2=");
  65 __obsolete_setup("gc_3=");
  66
  67 /* see also gs_psx_delay parameter in PSX support section */
  68
  69 #define GC_SNES         1
  70 #define GC_NES          2
  71 #define GC_NES4         3
  72 #define GC_MULTI        4
  73 #define GC_MULTI2       5
  74 #define GC_N64          6
  75 #define GC_PSX          7
  76 #define GC_DDR          8
  77 #define GC_SNESMOUSE    9
  78
  79 #define GC_MAX          9
  80
  81 #define GC_REFRESH_TIME HZ/100
  82
  83 struct gc {
  84         struct pardevice *pd;
  85         struct input_dev *dev[GC_MAX_DEVICES];
  86         struct timer_list timer;
  87         unsigned char pads[GC_MAX + 1];
  88         int used;
  89         struct mutex mutex;
  90         char phys[GC_MAX_DEVICES][32];
  91 };
  92
  93 static struct gc *gc_base[3];
  94
  95 static int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
  96
  97 static char *gc_names[] = { NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
  98                                 "Multisystem 2-button joystick", "N64 controller", "PSX controller",
  99                                 "PSX DDR controller", "SNES mouse" };
 100 /*
 101  * N64 support.
 102  */
 103
 104 static unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
 105 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 };
 106
 107 #define GC_N64_LENGTH           32              /* N64 bit length, not including stop bit */
 108 #define GC_N64_REQUEST_LENGTH   37              /* transmit request sequence is 9 bits long */
 109 #define GC_N64_DELAY            133             /* delay between transmit request, and response ready (us) */
 110 #define GC_N64_REQUEST          0x1dd1111111ULL /* the request data command (encoded for 000000011) */
 111 #define GC_N64_DWS              3               /* delay between write segments (required for sound playback because of ISA DMA) */
 112                                                 /* GC_N64_DWS > 24 is known to fail */
 113 #define GC_N64_POWER_W          0xe2            /* power during write (transmit request) */
 114 #define GC_N64_POWER_R          0xfd            /* power during read */
 115 #define GC_N64_OUT              0x1d            /* output bits to the 4 pads */
 116                                                 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
 117                                                 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
 118                                                 /* than 123 us */
 119 #define GC_N64_CLOCK            0x02            /* clock bits for read */
 120
 121 /*
 122  * gc_n64_read_packet() reads an N64 packet.
 123  * Each pad uses one bit per byte. So all pads connected to this port are read in parallel.
 124  */
 125
 126 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
 127 {
 128         int i;
 129         unsigned long flags;
 130
 131 /*
 132  * Request the pad to transmit data
 133  */
 134
 135         local_irq_save(flags);
 136         for (i = 0; i < GC_N64_REQUEST_LENGTH; i++) {
 137                 parport_write_data(gc->pd->port, GC_N64_POWER_W | ((GC_N64_REQUEST >> i) & 1 ? GC_N64_OUT : 0));
 138                 udelay(GC_N64_DWS);
 139         }
 140         local_irq_restore(flags);
 141
 142 /*
 143  * Wait for the pad response to be loaded into the 33-bit register of the adapter
 144  */
 145
 146         udelay(GC_N64_DELAY);
 147
 148 /*
 149  * Grab data (ignoring the last bit, which is a stop bit)
 150  */
 151
 152         for (i = 0; i < GC_N64_LENGTH; i++) {
 153                 parport_write_data(gc->pd->port, GC_N64_POWER_R);
 154                 data[i] = parport_read_status(gc->pd->port);
 155                 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
 156          }
 157
 158 /*
 159  * We must wait 200 ms here for the controller to reinitialize before the next read request.
 160  * No worries as long as gc_read is polled less frequently than this.
 161  */
 162
 163 }
 164
 165 static void gc_n64_process_packet(struct gc *gc)
 166 {
 167         unsigned char data[GC_N64_LENGTH];
 168         signed char axes[2];
 169         struct input_dev *dev;
 170         int i, j, s;
 171
 172         gc_n64_read_packet(gc, data);
 173
 174         for (i = 0; i < GC_MAX_DEVICES; i++) {
 175
 176                 dev = gc->dev[i];
 177                 if (!dev)
 178                         continue;
 179
 180                 s = gc_status_bit[i];
 181
 182                 if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {
 183
 184                         axes[0] = axes[1] = 0;
 185
 186                         for (j = 0; j < 8; j++) {
 187                                 if (data[23 - j] & s)
 188                                         axes[0] |= 1 << j;
 189                                 if (data[31 - j] & s)
 190                                         axes[1] |= 1 << j;
 191                         }
 192
 193                         input_report_abs(dev, ABS_X,  axes[0]);
 194                         input_report_abs(dev, ABS_Y, -axes[1]);
 195
 196                         input_report_abs(dev, ABS_HAT0X, !(s & data[6]) - !(s & data[7]));
 197                         input_report_abs(dev, ABS_HAT0Y, !(s & data[4]) - !(s & data[5]));
 198
 199                         for (j = 0; j < 10; j++)
 200                                 input_report_key(dev, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);
 201
 202                         input_sync(dev);
 203                 }
 204         }
 205 }
 206
 207 /*
 208  * NES/SNES support.
 209  */
 210
 211 #define GC_NES_DELAY            6       /* Delay between bits - 6us */
 212 #define GC_NES_LENGTH           8       /* The NES pads use 8 bits of data */
 213 #define GC_SNES_LENGTH          12      /* The SNES true length is 16, but the
 214                                            last 4 bits are unused */
 215 #define GC_SNESMOUSE_LENGTH     32      /* The SNES mouse uses 32 bits, the first
 216                                            16 bits are equivalent to a gamepad */
 217
 218 #define GC_NES_POWER    0xfc
 219 #define GC_NES_CLOCK    0x01
 220 #define GC_NES_LATCH    0x02
 221
 222 static unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
 223 static unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
 224 static short gc_snes_btn[] = { BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR };
 225
 226 /*
 227  * gc_nes_read_packet() reads a NES/SNES packet.
 228  * Each pad uses one bit per byte. So all pads connected to
 229  * this port are read in parallel.
 230  */
 231
 232 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
 233 {
 234         int i;
 235
 236         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
 237         udelay(GC_NES_DELAY * 2);
 238         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 239
 240         for (i = 0; i < length; i++) {
 241                 udelay(GC_NES_DELAY);
 242                 parport_write_data(gc->pd->port, GC_NES_POWER);
 243                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 244                 udelay(GC_NES_DELAY);
 245                 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 246         }
 247 }
 248
 249 static void gc_nes_process_packet(struct gc *gc)
 250 {
 251         unsigned char data[GC_SNESMOUSE_LENGTH];
 252         struct input_dev *dev;
 253         int i, j, s, len;
 254         char x_rel, y_rel;
 255
 256         len = gc->pads[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
 257                         (gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
 258
 259         gc_nes_read_packet(gc, len, data);
 260
 261         for (i = 0; i < GC_MAX_DEVICES; i++) {
 262
 263                 dev = gc->dev[i];
 264                 if (!dev)
 265                         continue;
 266
 267                 s = gc_status_bit[i];
 268
 269                 if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
 270                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
 271                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
 272                 }
 273
 274                 if (s & gc->pads[GC_NES])
 275                         for (j = 0; j < 4; j++)
 276                                 input_report_key(dev, gc_snes_btn[j], s & data[gc_nes_bytes[j]]);
 277
 278                 if (s & gc->pads[GC_SNES])
 279                         for (j = 0; j < 8; j++)
 280                                 input_report_key(dev, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);
 281
 282                 if (s & gc->pads[GC_SNESMOUSE]) {
 283                         /*
 284                          * The 4 unused bits from SNES controllers appear to be ID bits
 285                          * so use them to make sure iwe are dealing with a mouse.
 286                          * gamepad is connected. This is important since
 287                          * my SNES gamepad sends 1's for bits 16-31, which
 288                          * cause the mouse pointer to quickly move to the
 289                          * upper left corner of the screen.
 290                          */
 291                         if (!(s & data[12]) && !(s & data[13]) &&
 292                             !(s & data[14]) && (s & data[15])) {
 293                                 input_report_key(dev, BTN_LEFT, s & data[9]);
 294                                 input_report_key(dev, BTN_RIGHT, s & data[8]);
 295
 296                                 x_rel = y_rel = 0;
 297                                 for (j = 0; j < 7; j++) {
 298                                         x_rel <<= 1;
 299                                         if (data[25 + j] & s)
 300                                                 x_rel |= 1;
 301
 302                                         y_rel <<= 1;
 303                                         if (data[17 + j] & s)
 304                                                 y_rel |= 1;
 305                                 }
 306
 307                                 if (x_rel) {
 308                                         if (data[24] & s)
 309                                                 x_rel = -x_rel;
 310                                         input_report_rel(dev, REL_X, x_rel);
 311                                 }
 312
 313                                 if (y_rel) {
 314                                         if (data[16] & s)
 315                                                 y_rel = -y_rel;
 316                                         input_report_rel(dev, REL_Y, y_rel);
 317                                 }
 318                         }
 319                 }
 320                 input_sync(dev);
 321         }
 322 }
 323
 324 /*
 325  * Multisystem joystick support
 326  */
 327
 328 #define GC_MULTI_LENGTH         5       /* Multi system joystick packet length is 5 */
 329 #define GC_MULTI2_LENGTH        6       /* One more bit for one more button */
 330
 331 /*
 332  * gc_multi_read_packet() reads a Multisystem joystick packet.
 333  */
 334
 335 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
 336 {
 337         int i;
 338
 339         for (i = 0; i < length; i++) {
 340                 parport_write_data(gc->pd->port, ~(1 << i));
 341                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 342         }
 343 }
 344
 345 static void gc_multi_process_packet(struct gc *gc)
 346 {
 347         unsigned char data[GC_MULTI2_LENGTH];
 348         struct input_dev *dev;
 349         int i, s;
 350
 351         gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);
 352
 353         for (i = 0; i < GC_MAX_DEVICES; i++) {
 354
 355                 dev = gc->dev[i];
 356                 if (!dev)
 357                         continue;
 358
 359                 s = gc_status_bit[i];
 360
 361                 if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
 362                         input_report_abs(dev, ABS_X,  !(s & data[2]) - !(s & data[3]));
 363                         input_report_abs(dev, ABS_Y,  !(s & data[0]) - !(s & data[1]));
 364                         input_report_key(dev, BTN_TRIGGER, s & data[4]);
 365                 }
 366
 367                 if (s & gc->pads[GC_MULTI2])
 368                         input_report_key(dev, BTN_THUMB, s & data[5]);
 369
 370                 input_sync(dev);
 371         }
 372 }
 373
 374 /*
 375  * PSX support
 376  *
 377  * See documentation at:
 378  *      http://www.dim.com/~mackys/psxmemcard/ps-eng2.txt
 379  *      http://www.gamesx.com/controldata/psxcont/psxcont.htm
 380  *      ftp://milano.usal.es/pablo/
 381  *
 382  */
 383
 384 #define GC_PSX_DELAY    25              /* 25 usec */
 385 #define GC_PSX_LENGTH   8               /* talk to the controller in bits */
 386 #define GC_PSX_BYTES    6               /* the maximum number of bytes to read off the controller */
 387
 388 #define GC_PSX_MOUSE    1               /* Mouse */
 389 #define GC_PSX_NEGCON   2               /* NegCon */
 390 #define GC_PSX_NORMAL   4               /* Digital / Analog or Rumble in Digital mode  */
 391 #define GC_PSX_ANALOG   5               /* Analog in Analog mode / Rumble in Green mode */
 392 #define GC_PSX_RUMBLE   7               /* Rumble in Red mode */
 393
 394 #define GC_PSX_CLOCK    0x04            /* Pin 4 */
 395 #define GC_PSX_COMMAND  0x01            /* Pin 2 */
 396 #define GC_PSX_POWER    0xf8            /* Pins 5-9 */
 397 #define GC_PSX_SELECT   0x02            /* Pin 3 */
 398
 399 #define GC_PSX_ID(x)    ((x) >> 4)      /* High nibble is device type */
 400 #define GC_PSX_LEN(x)   (((x) & 0xf) << 1)      /* Low nibble is length in bytes/2 */
 401
 402 static int gc_psx_delay = GC_PSX_DELAY;
 403 module_param_named(psx_delay, gc_psx_delay, uint, 0);
 404 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
 405
 406 __obsolete_setup("gc_psx_delay=");
 407
 408 static short gc_psx_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y };
 409 static short gc_psx_btn[] = { BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
 410                                 BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR };
 411 static short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
 412
 413 /*
 414  * gc_psx_command() writes 8bit command and reads 8bit data from
 415  * the psx pad.
 416  */
 417
 418 static void gc_psx_command(struct gc *gc, int b, unsigned char data[GC_MAX_DEVICES])
 419 {
 420         int i, j, cmd, read;
 421
 422         for (i = 0; i < GC_MAX_DEVICES; i++)
 423                 data[i] = 0;
 424
 425         for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
 426                 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
 427                 parport_write_data(gc->pd->port, cmd | GC_PSX_POWER);
 428                 udelay(gc_psx_delay);
 429                 read = parport_read_status(gc->pd->port) ^ 0x80;
 430                 for (j = 0; j < GC_MAX_DEVICES; j++)
 431                         data[j] |= (read & gc_status_bit[j] & (gc->pads[GC_PSX] | gc->pads[GC_DDR])) ? (1 << i) : 0;
 432                 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
 433                 udelay(gc_psx_delay);
 434         }
 435 }
 436
 437 /*
 438  * gc_psx_read_packet() reads a whole psx packet and returns
 439  * device identifier code.
 440  */
 441
 442 static void gc_psx_read_packet(struct gc *gc, unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
 443                                unsigned char id[GC_MAX_DEVICES])
 444 {
 445         int i, j, max_len = 0;
 446         unsigned long flags;
 447         unsigned char data2[GC_MAX_DEVICES];
 448
 449         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);  /* Select pad */
 450         udelay(gc_psx_delay);
 451         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);                  /* Deselect, begin command */
 452         udelay(gc_psx_delay);
 453
 454         local_irq_save(flags);
 455
 456         gc_psx_command(gc, 0x01, data2);                                                /* Access pad */
 457         gc_psx_command(gc, 0x42, id);                                                   /* Get device ids */
 458         gc_psx_command(gc, 0, data2);                                                   /* Dump status */
 459
 460         for (i =0; i < GC_MAX_DEVICES; i++)                                                             /* Find the longest pad */
 461                 if((gc_status_bit[i] & (gc->pads[GC_PSX] | gc->pads[GC_DDR]))
 462                         && (GC_PSX_LEN(id[i]) > max_len)
 463                         && (GC_PSX_LEN(id[i]) <= GC_PSX_BYTES))
 464                         max_len = GC_PSX_LEN(id[i]);
 465
 466         for (i = 0; i < max_len; i++) {                                         /* Read in all the data */
 467                 gc_psx_command(gc, 0, data2);
 468                 for (j = 0; j < GC_MAX_DEVICES; j++)
 469                         data[j][i] = data2[j];
 470         }
 471
 472         local_irq_restore(flags);
 473
 474         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 475
 476         for(i = 0; i < GC_MAX_DEVICES; i++)                                                             /* Set id's to the real value */
 477                 id[i] = GC_PSX_ID(id[i]);
 478 }
 479
 480 static void gc_psx_process_packet(struct gc *gc)
 481 {
 482         unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
 483         unsigned char id[GC_MAX_DEVICES];
 484         struct input_dev *dev;
 485         int i, j;
 486
 487         gc_psx_read_packet(gc, data, id);
 488
 489         for (i = 0; i < GC_MAX_DEVICES; i++) {
 490
 491                 dev = gc->dev[i];
 492                 if (!dev)
 493                         continue;
 494
 495                 switch (id[i]) {
 496
 497                         case GC_PSX_RUMBLE:
 498
 499                                 input_report_key(dev, BTN_THUMBL, ~data[i][0] & 0x04);
 500                                 input_report_key(dev, BTN_THUMBR, ~data[i][0] & 0x02);
 501
 502                         case GC_PSX_NEGCON:
 503                         case GC_PSX_ANALOG:
 504
 505                                 if (gc->pads[GC_DDR] & gc_status_bit[i]) {
 506                                         for(j = 0; j < 4; j++)
 507                                                 input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
 508                                 } else {
 509                                         for (j = 0; j < 4; j++)
 510                                                 input_report_abs(dev, gc_psx_abs[j + 2], data[i][j + 2]);
 511
 512                                         input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
 513                                         input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
 514                                 }
 515
 516                                 for (j = 0; j < 8; j++)
 517                                         input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
 518
 519                                 input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
 520                                 input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
 521
 522                                 input_sync(dev);
 523
 524                                 break;
 525
 526                         case GC_PSX_NORMAL:
 527                                 if (gc->pads[GC_DDR] & gc_status_bit[i]) {
 528                                         for(j = 0; j < 4; j++)
 529                                                 input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
 530                                 } else {
 531                                         input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
 532                                         input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
 533
 534                                         /* for some reason if the extra axes are left unset they drift */
 535                                         /* for (j = 0; j < 4; j++)
 536                                                 input_report_abs(dev, gc_psx_abs[j + 2], 128);
 537                                          * This needs to be debugged properly,
 538                                          * maybe fuzz processing needs to be done in input_sync()
 539                                          *                               --vojtech
 540                                          */
 541                                 }
 542
 543                                 for (j = 0; j < 8; j++)
 544                                         input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
 545
 546                                 input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
 547                                 input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
 548
 549                                 input_sync(dev);
 550
 551                                 break;
 552
 553                         case 0: /* not a pad, ignore */
 554                                 break;
 555                 }
 556         }
 557 }
 558
 559 /*
 560  * gc_timer() initiates reads of console pads data.
 561  */
 562
 563 static void gc_timer(unsigned long private)
 564 {
 565         struct gc *gc = (void *) private;
 566
 567 /*
 568  * N64 pads - must be read first, any read confuses them for 200 us
 569  */
 570
 571         if (gc->pads[GC_N64])
 572                 gc_n64_process_packet(gc);
 573
 574 /*
 575  * NES and SNES pads or mouse
 576  */
 577
 578         if (gc->pads[GC_NES] || gc->pads[GC_SNES] || gc->pads[GC_SNESMOUSE])
 579                 gc_nes_process_packet(gc);
 580
 581 /*
 582  * Multi and Multi2 joysticks
 583  */
 584
 585         if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2])
 586                 gc_multi_process_packet(gc);
 587
 588 /*
 589  * PSX controllers
 590  */
 591
 592         if (gc->pads[GC_PSX] || gc->pads[GC_DDR])
 593                 gc_psx_process_packet(gc);
 594
 595         mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 596 }
 597
 598 static int gc_open(struct input_dev *dev)
 599 {
 600         struct gc *gc = dev->private;
 601         int err;
 602
 603         err = mutex_lock_interruptible(&gc->mutex);
 604         if (err)
 605                 return err;
 606
 607         if (!gc->used++) {
 608                 parport_claim(gc->pd);
 609                 parport_write_control(gc->pd->port, 0x04);
 610                 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 611         }
 612
 613         mutex_unlock(&gc->mutex);
 614         return 0;
 615 }
 616
 617 static void gc_close(struct input_dev *dev)
 618 {
 619         struct gc *gc = dev->private;
 620
 621         mutex_lock(&gc->mutex);
 622         if (!--gc->used) {
 623                 del_timer_sync(&gc->timer);
 624                 parport_write_control(gc->pd->port, 0x00);
 625                 parport_release(gc->pd);
 626         }
 627         mutex_unlock(&gc->mutex);
 628 }
 629
 630 static int __init gc_setup_pad(struct gc *gc, int idx, int pad_type)
 631 {
 632         struct input_dev *input_dev;
 633         int i;
 634
 635         if (!pad_type)
 636                 return 0;
 637
 638         if (pad_type < 1 || pad_type > GC_MAX) {
 639                 printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", pad_type);
 640                 return -EINVAL;
 641         }
 642
 643         gc->dev[idx] = input_dev = input_allocate_device();
 644         if (!input_dev) {
 645                 printk(KERN_ERR "gamecon.c: Not enough memory for input device\n");
 646                 return -ENOMEM;
 647         }
 648
 649         input_dev->name = gc_names[pad_type];
 650         input_dev->phys = gc->phys[idx];
 651         input_dev->id.bustype = BUS_PARPORT;
 652         input_dev->id.vendor = 0x0001;
 653         input_dev->id.product = pad_type;
 654         input_dev->id.version = 0x0100;
 655         input_dev->private = gc;
 656
 657         input_dev->open = gc_open;
 658         input_dev->close = gc_close;
 659
 660         if (pad_type != GC_SNESMOUSE) {
 661                 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 662
 663                 for (i = 0; i < 2; i++)
 664                         input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
 665         } else
 666                 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
 667
 668         gc->pads[0] |= gc_status_bit[idx];
 669         gc->pads[pad_type] |= gc_status_bit[idx];
 670
 671         switch (pad_type) {
 672
 673                 case GC_N64:
 674                         for (i = 0; i < 10; i++)
 675                                 set_bit(gc_n64_btn[i], input_dev->keybit);
 676
 677                         for (i = 0; i < 2; i++) {
 678                                 input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
 679                                 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 680                         }
 681
 682                         break;
 683
 684                 case GC_SNESMOUSE:
 685                         set_bit(BTN_LEFT, input_dev->keybit);
 686                         set_bit(BTN_RIGHT, input_dev->keybit);
 687                         set_bit(REL_X, input_dev->relbit);
 688                         set_bit(REL_Y, input_dev->relbit);
 689                         break;
 690
 691                 case GC_SNES:
 692                         for (i = 4; i < 8; i++)
 693                                 set_bit(gc_snes_btn[i], input_dev->keybit);
 694                 case GC_NES:
 695                         for (i = 0; i < 4; i++)
 696                                 set_bit(gc_snes_btn[i], input_dev->keybit);
 697                         break;
 698
 699                 case GC_MULTI2:
 700                         set_bit(BTN_THUMB, input_dev->keybit);
 701                 case GC_MULTI:
 702                         set_bit(BTN_TRIGGER, input_dev->keybit);
 703                         break;
 704
 705                 case GC_PSX:
 706                         for (i = 0; i < 6; i++)
 707                                 input_set_abs_params(input_dev, gc_psx_abs[i], 4, 252, 0, 2);
 708                         for (i = 0; i < 12; i++)
 709                                 set_bit(gc_psx_btn[i], input_dev->keybit);
 710
 711                         break;
 712
 713                 case GC_DDR:
 714                         for (i = 0; i < 4; i++)
 715                                 set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
 716                         for (i = 0; i < 12; i++)
 717                                 set_bit(gc_psx_btn[i], input_dev->keybit);
 718
 719                         break;
 720         }
 721
 722         return 0;
 723 }
 724
 725 static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
 726 {
 727         struct gc *gc;
 728         struct parport *pp;
 729         struct pardevice *pd;
 730         int i;
 731         int err;
 732
 733         pp = parport_find_number(parport);
 734         if (!pp) {
 735                 printk(KERN_ERR "gamecon.c: no such parport\n");
 736                 err = -EINVAL;
 737                 goto err_out;
 738         }
 739
 740         pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
 741         if (!pd) {
 742                 printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
 743                 err = -EBUSY;
 744                 goto err_put_pp;
 745         }
 746
 747         gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
 748         if (!gc) {
 749                 printk(KERN_ERR "gamecon.c: Not enough memory\n");
 750                 err = -ENOMEM;
 751                 goto err_unreg_pardev;
 752         }
 753
 754         mutex_init(&gc->mutex);
 755         gc->pd = pd;
 756         init_timer(&gc->timer);
 757         gc->timer.data = (long) gc;
 758         gc->timer.function = gc_timer;
 759
 760         for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
 761                 if (!pads[i])
 762                         continue;
 763
 764                 snprintf(gc->phys[i], sizeof(gc->phys[i]),
 765                          "%s/input%d", gc->pd->port->name, i);
 766                 err = gc_setup_pad(gc, i, pads[i]);
 767                 if (err)
 768                         goto err_unreg_devs;
 769
 770                 err = input_register_device(gc->dev[i]);
 771                 if (err)
 772                         goto err_free_dev;
 773         }
 774
 775         if (!gc->pads[0]) {
 776                 printk(KERN_ERR "gamecon.c: No valid devices specified\n");
 777                 err = -EINVAL;
 778                 goto err_free_gc;
 779         }
 780
 781         parport_put_port(pp);
 782         return gc;
 783
 784  err_free_dev:
 785         input_free_device(gc->dev[i]);
 786  err_unreg_devs:
 787         while (--i >= 0)
 788                 if (gc->dev[i])
 789                         input_unregister_device(gc->dev[i]);
 790  err_free_gc:
 791         kfree(gc);
 792  err_unreg_pardev:
 793         parport_unregister_device(pd);
 794  err_put_pp:
 795         parport_put_port(pp);
 796  err_out:
 797         return ERR_PTR(err);
 798 }
 799
 800 static void gc_remove(struct gc *gc)
 801 {
 802         int i;
 803
 804         for (i = 0; i < GC_MAX_DEVICES; i++)
 805                 if (gc->dev[i])
 806                         input_unregister_device(gc->dev[i]);
 807         parport_unregister_device(gc->pd);
 808         kfree(gc);
 809 }
 810
 811 static int __init gc_init(void)
 812 {
 813         int i;
 814         int have_dev = 0;
 815         int err = 0;
 816
 817         for (i = 0; i < GC_MAX_PORTS; i++) {
 818                 if (gc[i].nargs == 0 || gc[i].args[0] < 0)
 819                         continue;
 820
 821                 if (gc[i].nargs < 2) {
 822                         printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
 823                         err = -EINVAL;
 824                         break;
 825                 }
 826
 827                 gc_base[i] = gc_probe(gc[i].args[0], gc[i].args + 1, gc[i].nargs - 1);
 828                 if (IS_ERR(gc_base[i])) {
 829                         err = PTR_ERR(gc_base[i]);
 830                         break;
 831                 }
 832
 833                 have_dev = 1;
 834         }
 835
 836         if (err) {
 837                 while (--i >= 0)
 838                         if (gc_base[i])
 839                                 gc_remove(gc_base[i]);
 840                 return err;
 841         }
 842
 843         return have_dev ? 0 : -ENODEV;
 844 }
 845
 846 static void __exit gc_exit(void)
 847 {
 848         int i;
 849
 850         for (i = 0; i < GC_MAX_PORTS; i++)
 851                 if (gc_base[i])
 852                         gc_remove(gc_base[i]);
 853 }
 854
 855 module_init(gc_init);
 856 module_exit(gc_exit);