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

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