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