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   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/init.h>
  37 #include <linux/parport.h>
  38 #include <linux/input.h>
  39 #include <linux/mutex.h>
  40
  41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  42 MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
  43 MODULE_LICENSE("GPL");
  44
  45 #define GC_MAX_PORTS            3
  46 #define GC_MAX_DEVICES          5
  47
  48 struct gc_config {
  49         int args[GC_MAX_DEVICES + 1];
  50         unsigned int nargs;
  51 };
  52
  53 static struct gc_config gc_cfg[GC_MAX_PORTS] __initdata;
  54
  55 module_param_array_named(map, gc_cfg[0].args, int, &gc_cfg[0].nargs, 0);
  56 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
  57 module_param_array_named(map2, gc_cfg[1].args, int, &gc_cfg[1].nargs, 0);
  58 MODULE_PARM_DESC(map2, "Describes second set of devices");
  59 module_param_array_named(map3, gc_cfg[2].args, int, &gc_cfg[2].nargs, 0);
  60 MODULE_PARM_DESC(map3, "Describes third set of devices");
  61
  62 /* see also gs_psx_delay parameter in PSX support section */
  63
  64 #define GC_SNES         1
  65 #define GC_NES          2
  66 #define GC_NES4         3
  67 #define GC_MULTI        4
  68 #define GC_MULTI2       5
  69 #define GC_N64          6
  70 #define GC_PSX          7
  71 #define GC_DDR          8
  72 #define GC_SNESMOUSE    9
  73
  74 #define GC_MAX          9
  75
  76 #define GC_REFRESH_TIME HZ/100
  77
  78 struct gc {
  79         struct pardevice *pd;
  80         struct input_dev *dev[GC_MAX_DEVICES];
  81         struct timer_list timer;
  82         unsigned char pads[GC_MAX + 1];
  83         int used;
  84         struct mutex mutex;
  85         char phys[GC_MAX_DEVICES][32];
  86 };
  87
  88 struct gc_subdev {
  89         unsigned int idx;
  90 };
  91
  92 static struct gc *gc_base[3];
  93
  94 static int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
  95
  96 static char *gc_names[] = {
  97         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
 102 /*
 103  * N64 support.
 104  */
 105
 106 static unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
 107 static short gc_n64_btn[] = {
 108         BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,
 109         BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START
 110 };
 111
 112 #define GC_N64_LENGTH           32              /* N64 bit length, not including stop bit */
 113 #define GC_N64_STOP_LENGTH      5               /* Length of encoded stop bit */
 114 #define GC_N64_CMD_00           0x11111111UL
 115 #define GC_N64_CMD_01           0xd1111111UL
 116 #define GC_N64_CMD_03           0xdd111111UL
 117 #define GC_N64_CMD_1b           0xdd1dd111UL
 118 #define GC_N64_CMD_c0           0x111111ddUL
 119 #define GC_N64_CMD_80           0x1111111dUL
 120 #define GC_N64_STOP_BIT         0x1d            /* Encoded stop bit */
 121 #define GC_N64_REQUEST_DATA     GC_N64_CMD_01   /* the request data command */
 122 #define GC_N64_DELAY            133             /* delay between transmit request, and response ready (us) */
 123 #define GC_N64_DWS              3               /* delay between write segments (required for sound playback because of ISA DMA) */
 124                                                 /* GC_N64_DWS > 24 is known to fail */
 125 #define GC_N64_POWER_W          0xe2            /* power during write (transmit request) */
 126 #define GC_N64_POWER_R          0xfd            /* power during read */
 127 #define GC_N64_OUT              0x1d            /* output bits to the 4 pads */
 128                                                 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
 129                                                 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
 130                                                 /* than 123 us */
 131 #define GC_N64_CLOCK            0x02            /* clock bits for read */
 132
 133 /*
 134  * Used for rumble code.
 135  */
 136
 137 /* Send encoded command */
 138 static void gc_n64_send_command(struct gc *gc, unsigned long cmd,
 139                                 unsigned char target)
 140 {
 141         struct parport *port = gc->pd->port;
 142         int i;
 143
 144         for (i = 0; i < GC_N64_LENGTH; i++) {
 145                 unsigned char data = (cmd >> i) & 1 ? target : 0;
 146                 parport_write_data(port, GC_N64_POWER_W | data);
 147                 udelay(GC_N64_DWS);
 148         }
 149 }
 150
 151 /* Send stop bit */
 152 static void gc_n64_send_stop_bit(struct gc *gc, unsigned char target)
 153 {
 154         struct parport *port = gc->pd->port;
 155         int i;
 156
 157         for (i = 0; i < GC_N64_STOP_LENGTH; i++) {
 158                 unsigned char data = (GC_N64_STOP_BIT >> i) & 1 ? target : 0;
 159                 parport_write_data(port, GC_N64_POWER_W | data);
 160                 udelay(GC_N64_DWS);
 161         }
 162 }
 163
 164 /*
 165  * gc_n64_read_packet() reads an N64 packet.
 166  * Each pad uses one bit per byte. So all pads connected to this port
 167  * are read in parallel.
 168  */
 169
 170 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
 171 {
 172         int i;
 173         unsigned long flags;
 174
 175 /*
 176  * Request the pad to transmit data
 177  */
 178
 179         local_irq_save(flags);
 180         gc_n64_send_command(gc, GC_N64_REQUEST_DATA, GC_N64_OUT);
 181         gc_n64_send_stop_bit(gc, GC_N64_OUT);
 182         local_irq_restore(flags);
 183
 184 /*
 185  * Wait for the pad response to be loaded into the 33-bit register
 186  * of the adapter.
 187  */
 188
 189         udelay(GC_N64_DELAY);
 190
 191 /*
 192  * Grab data (ignoring the last bit, which is a stop bit)
 193  */
 194
 195         for (i = 0; i < GC_N64_LENGTH; i++) {
 196                 parport_write_data(gc->pd->port, GC_N64_POWER_R);
 197                 udelay(2);
 198                 data[i] = parport_read_status(gc->pd->port);
 199                 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
 200          }
 201
 202 /*
 203  * We must wait 200 ms here for the controller to reinitialize before
 204  * the next read request. No worries as long as gc_read is polled less
 205  * frequently than this.
 206  */
 207
 208 }
 209
 210 static void gc_n64_process_packet(struct gc *gc)
 211 {
 212         unsigned char data[GC_N64_LENGTH];
 213         struct input_dev *dev;
 214         int i, j, s;
 215         signed char x, y;
 216
 217         gc_n64_read_packet(gc, data);
 218
 219         for (i = 0; i < GC_MAX_DEVICES; i++) {
 220
 221                 dev = gc->dev[i];
 222                 if (!dev)
 223                         continue;
 224
 225                 s = gc_status_bit[i];
 226
 227                 if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {
 228
 229                         x = y = 0;
 230
 231                         for (j = 0; j < 8; j++) {
 232                                 if (data[23 - j] & s)
 233                                         x |= 1 << j;
 234                                 if (data[31 - j] & s)
 235                                         y |= 1 << j;
 236                         }
 237
 238                         input_report_abs(dev, ABS_X,  x);
 239                         input_report_abs(dev, ABS_Y, -y);
 240
 241                         input_report_abs(dev, ABS_HAT0X,
 242                                          !(s & data[6]) - !(s & data[7]));
 243                         input_report_abs(dev, ABS_HAT0Y,
 244                                          !(s & data[4]) - !(s & data[5]));
 245
 246                         for (j = 0; j < 10; j++)
 247                                 input_report_key(dev, gc_n64_btn[j],
 248                                                  s & data[gc_n64_bytes[j]]);
 249
 250                         input_sync(dev);
 251                 }
 252         }
 253 }
 254
 255 static int gc_n64_play_effect(struct input_dev *dev, void *data,
 256                               struct ff_effect *effect)
 257 {
 258         int i;
 259         unsigned long flags;
 260         struct gc *gc = input_get_drvdata(dev);
 261         struct gc_subdev *sdev = data;
 262         unsigned char target = 1 << sdev->idx; /* select desired pin */
 263
 264         if (effect->type == FF_RUMBLE) {
 265                 struct ff_rumble_effect *rumble = &effect->u.rumble;
 266                 unsigned int cmd =
 267                         rumble->strong_magnitude || rumble->weak_magnitude ?
 268                         GC_N64_CMD_01 : GC_N64_CMD_00;
 269
 270                 local_irq_save(flags);
 271
 272                 /* Init Rumble - 0x03, 0x80, 0x01, (34)0x80 */
 273                 gc_n64_send_command(gc, GC_N64_CMD_03, target);
 274                 gc_n64_send_command(gc, GC_N64_CMD_80, target);
 275                 gc_n64_send_command(gc, GC_N64_CMD_01, target);
 276                 for (i = 0; i < 32; i++)
 277                         gc_n64_send_command(gc, GC_N64_CMD_80, target);
 278                 gc_n64_send_stop_bit(gc, target);
 279
 280                 udelay(GC_N64_DELAY);
 281
 282                 /* Now start or stop it - 0x03, 0xc0, 0zx1b, (32)0x01/0x00 */
 283                 gc_n64_send_command(gc, GC_N64_CMD_03, target);
 284                 gc_n64_send_command(gc, GC_N64_CMD_c0, target);
 285                 gc_n64_send_command(gc, GC_N64_CMD_1b, target);
 286                 for (i = 0; i < 32; i++)
 287                         gc_n64_send_command(gc, cmd, target);
 288                 gc_n64_send_stop_bit(gc, target);
 289
 290                 local_irq_restore(flags);
 291
 292         }
 293
 294         return 0;
 295 }
 296
 297 static int __init gc_n64_init_ff(struct input_dev *dev, int i)
 298 {
 299         struct gc_subdev *sdev;
 300         int err;
 301
 302         sdev = kmalloc(sizeof(*sdev), GFP_KERNEL);
 303         if (!sdev)
 304                 return -ENOMEM;
 305
 306         sdev->idx = i;
 307
 308         input_set_capability(dev, EV_FF, FF_RUMBLE);
 309
 310         err = input_ff_create_memless(dev, sdev, gc_n64_play_effect);
 311         if (err) {
 312                 kfree(sdev);
 313                 return err;
 314         }
 315
 316         return 0;
 317 }
 318
 319 /*
 320  * NES/SNES support.
 321  */
 322
 323 #define GC_NES_DELAY            6       /* Delay between bits - 6us */
 324 #define GC_NES_LENGTH           8       /* The NES pads use 8 bits of data */
 325 #define GC_SNES_LENGTH          12      /* The SNES true length is 16, but the
 326                                            last 4 bits are unused */
 327 #define GC_SNESMOUSE_LENGTH     32      /* The SNES mouse uses 32 bits, the first
 328                                            16 bits are equivalent to a gamepad */
 329
 330 #define GC_NES_POWER    0xfc
 331 #define GC_NES_CLOCK    0x01
 332 #define GC_NES_LATCH    0x02
 333
 334 static unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
 335 static unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
 336 static short gc_snes_btn[] = {
 337         BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR
 338 };
 339
 340 /*
 341  * gc_nes_read_packet() reads a NES/SNES packet.
 342  * Each pad uses one bit per byte. So all pads connected to
 343  * this port are read in parallel.
 344  */
 345
 346 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
 347 {
 348         int i;
 349
 350         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
 351         udelay(GC_NES_DELAY * 2);
 352         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 353
 354         for (i = 0; i < length; i++) {
 355                 udelay(GC_NES_DELAY);
 356                 parport_write_data(gc->pd->port, GC_NES_POWER);
 357                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 358                 udelay(GC_NES_DELAY);
 359                 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 360         }
 361 }
 362
 363 static void gc_nes_process_packet(struct gc *gc)
 364 {
 365         unsigned char data[GC_SNESMOUSE_LENGTH];
 366         struct input_dev *dev;
 367         int i, j, s, len;
 368         char x_rel, y_rel;
 369
 370         len = gc->pads[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
 371                         (gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
 372
 373         gc_nes_read_packet(gc, len, data);
 374
 375         for (i = 0; i < GC_MAX_DEVICES; i++) {
 376
 377                 dev = gc->dev[i];
 378                 if (!dev)
 379                         continue;
 380
 381                 s = gc_status_bit[i];
 382
 383                 if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
 384                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
 385                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
 386                 }
 387
 388                 if (s & gc->pads[GC_NES])
 389                         for (j = 0; j < 4; j++)
 390                                 input_report_key(dev, gc_snes_btn[j],
 391                                                  s & data[gc_nes_bytes[j]]);
 392
 393                 if (s & gc->pads[GC_SNES])
 394                         for (j = 0; j < 8; j++)
 395                                 input_report_key(dev, gc_snes_btn[j],
 396                                                  s & data[gc_snes_bytes[j]]);
 397
 398                 if (s & gc->pads[GC_SNESMOUSE]) {
 399                         /*
 400                          * The 4 unused bits from SNES controllers appear
 401                          * to be ID bits so use them to make sure we are
 402                          * dealing with a mouse.
 403                          * gamepad is connected. This is important since
 404                          * my SNES gamepad sends 1's for bits 16-31, which
 405                          * cause the mouse pointer to quickly move to the
 406                          * upper left corner of the screen.
 407                          */
 408                         if (!(s & data[12]) && !(s & data[13]) &&
 409                             !(s & data[14]) && (s & data[15])) {
 410                                 input_report_key(dev, BTN_LEFT, s & data[9]);
 411                                 input_report_key(dev, BTN_RIGHT, s & data[8]);
 412
 413                                 x_rel = y_rel = 0;
 414                                 for (j = 0; j < 7; j++) {
 415                                         x_rel <<= 1;
 416                                         if (data[25 + j] & s)
 417                                                 x_rel |= 1;
 418
 419                                         y_rel <<= 1;
 420                                         if (data[17 + j] & s)
 421                                                 y_rel |= 1;
 422                                 }
 423
 424                                 if (x_rel) {
 425                                         if (data[24] & s)
 426                                                 x_rel = -x_rel;
 427                                         input_report_rel(dev, REL_X, x_rel);
 428                                 }
 429
 430                                 if (y_rel) {
 431                                         if (data[16] & s)
 432                                                 y_rel = -y_rel;
 433                                         input_report_rel(dev, REL_Y, y_rel);
 434                                 }
 435                         }
 436                 }
 437                 input_sync(dev);
 438         }
 439 }
 440
 441 /*
 442  * Multisystem joystick support
 443  */
 444
 445 #define GC_MULTI_LENGTH         5       /* Multi system joystick packet length is 5 */
 446 #define GC_MULTI2_LENGTH        6       /* One more bit for one more button */
 447
 448 /*
 449  * gc_multi_read_packet() reads a Multisystem joystick packet.
 450  */
 451
 452 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
 453 {
 454         int i;
 455
 456         for (i = 0; i < length; i++) {
 457                 parport_write_data(gc->pd->port, ~(1 << i));
 458                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 459         }
 460 }
 461
 462 static void gc_multi_process_packet(struct gc *gc)
 463 {
 464         unsigned char data[GC_MULTI2_LENGTH];
 465         int data_len = gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH;
 466         struct input_dev *dev;
 467         int i, s;
 468
 469         gc_multi_read_packet(gc, data_len, data);
 470
 471         for (i = 0; i < GC_MAX_DEVICES; i++) {
 472
 473                 dev = gc->dev[i];
 474                 if (!dev)
 475                         continue;
 476
 477                 s = gc_status_bit[i];
 478
 479                 if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
 480                         input_report_abs(dev, ABS_X,
 481                                          !(s & data[2]) - !(s & data[3]));
 482                         input_report_abs(dev, ABS_Y,
 483                                          !(s & data[0]) - !(s & data[1]));
 484                         input_report_key(dev, BTN_TRIGGER, s & data[4]);
 485                 }
 486
 487                 if (s & gc->pads[GC_MULTI2])
 488                         input_report_key(dev, BTN_THUMB, s & data[5]);
 489
 490                 input_sync(dev);
 491         }
 492 }
 493
 494 /*
 495  * PSX support
 496  *
 497  * See documentation at:
 498  *      http://www.dim.com/~mackys/psxmemcard/ps-eng2.txt
 499  *      http://www.gamesx.com/controldata/psxcont/psxcont.htm
 500  *      ftp://milano.usal.es/pablo/
 501  *
 502  */
 503
 504 #define GC_PSX_DELAY    25              /* 25 usec */
 505 #define GC_PSX_LENGTH   8               /* talk to the controller in bits */
 506 #define GC_PSX_BYTES    6               /* the maximum number of bytes to read off the controller */
 507
 508 #define GC_PSX_MOUSE    1               /* Mouse */
 509 #define GC_PSX_NEGCON   2               /* NegCon */
 510 #define GC_PSX_NORMAL   4               /* Digital / Analog or Rumble in Digital mode  */
 511 #define GC_PSX_ANALOG   5               /* Analog in Analog mode / Rumble in Green mode */
 512 #define GC_PSX_RUMBLE   7               /* Rumble in Red mode */
 513
 514 #define GC_PSX_CLOCK    0x04            /* Pin 4 */
 515 #define GC_PSX_COMMAND  0x01            /* Pin 2 */
 516 #define GC_PSX_POWER    0xf8            /* Pins 5-9 */
 517 #define GC_PSX_SELECT   0x02            /* Pin 3 */
 518
 519 #define GC_PSX_ID(x)    ((x) >> 4)      /* High nibble is device type */
 520 #define GC_PSX_LEN(x)   (((x) & 0xf) << 1)      /* Low nibble is length in bytes/2 */
 521
 522 static int gc_psx_delay = GC_PSX_DELAY;
 523 module_param_named(psx_delay, gc_psx_delay, uint, 0);
 524 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
 525
 526 static short gc_psx_abs[] = {
 527         ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y
 528 };
 529 static short gc_psx_btn[] = {
 530         BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
 531         BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR
 532 };
 533 static short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
 534
 535 /*
 536  * gc_psx_command() writes 8bit command and reads 8bit data from
 537  * the psx pad.
 538  */
 539
 540 static void gc_psx_command(struct gc *gc, int b, unsigned char *data)
 541 {
 542         struct parport *port = gc->pd->port;
 543         int i, j, cmd, read;
 544
 545         memset(data, 0, GC_MAX_DEVICES);
 546
 547         for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
 548                 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
 549                 parport_write_data(port, cmd | GC_PSX_POWER);
 550                 udelay(gc_psx_delay);
 551                 read = parport_read_status(port) ^ 0x80;
 552                 for (j = 0; j < GC_MAX_DEVICES; j++)
 553                         data[j] |= (read & gc_status_bit[j] & (gc->pads[GC_PSX] | gc->pads[GC_DDR])) ? (1 << i) : 0;
 554                 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
 555                 udelay(gc_psx_delay);
 556         }
 557 }
 558
 559 /*
 560  * gc_psx_read_packet() reads a whole psx packet and returns
 561  * device identifier code.
 562  */
 563
 564 static void gc_psx_read_packet(struct gc *gc, unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
 565                                unsigned char id[GC_MAX_DEVICES])
 566 {
 567         int i, j, max_len = 0;
 568         unsigned long flags;
 569         unsigned char data2[GC_MAX_DEVICES];
 570
 571         /* Select pad */
 572         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 573         udelay(gc_psx_delay);
 574         /* Deselect, begin command */
 575         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);
 576         udelay(gc_psx_delay);
 577
 578         local_irq_save(flags);
 579
 580         gc_psx_command(gc, 0x01, data2);        /* Access pad */
 581         gc_psx_command(gc, 0x42, id);           /* Get device ids */
 582         gc_psx_command(gc, 0, data2);           /* Dump status */
 583
 584         /* Find the longest pad */
 585         for (i = 0; i < GC_MAX_DEVICES; i++)
 586                 if ((gc_status_bit[i] & (gc->pads[GC_PSX] | gc->pads[GC_DDR])) &&
 587                     GC_PSX_LEN(id[i]) > max_len &&
 588                     GC_PSX_LEN(id[i]) <= GC_PSX_BYTES) {
 589                         max_len = GC_PSX_LEN(id[i]);
 590                 }
 591
 592         /* Read in all the data */
 593         for (i = 0; i < max_len; i++) {
 594                 gc_psx_command(gc, 0, data2);
 595                 for (j = 0; j < GC_MAX_DEVICES; j++)
 596                         data[j][i] = data2[j];
 597         }
 598
 599         local_irq_restore(flags);
 600
 601         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 602
 603         /* Set id's to the real value */
 604         for (i = 0; i < GC_MAX_DEVICES; i++)
 605                 id[i] = GC_PSX_ID(id[i]);
 606 }
 607
 608 static void gc_psx_report_one(struct gc *gc, struct input_dev *dev,
 609                               unsigned char pad_type, unsigned char status_bit,
 610                               unsigned char *data)
 611 {
 612         int i;
 613
 614         switch (pad_type) {
 615
 616         case GC_PSX_RUMBLE:
 617
 618                 input_report_key(dev, BTN_THUMBL, ~data[0] & 0x04);
 619                 input_report_key(dev, BTN_THUMBR, ~data[0] & 0x02);
 620
 621         case GC_PSX_NEGCON:
 622         case GC_PSX_ANALOG:
 623
 624                 if (gc->pads[GC_DDR] & status_bit) {
 625                         for (i = 0; i < 4; i++)
 626                                 input_report_key(dev, gc_psx_ddr_btn[i],
 627                                                  ~data[0] & (0x10 << i));
 628                 } else {
 629                         for (i = 0; i < 4; i++)
 630                                 input_report_abs(dev, gc_psx_abs[i + 2],
 631                                                  data[i + 2]);
 632
 633                         input_report_abs(dev, ABS_X,
 634                                 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
 635                         input_report_abs(dev, ABS_Y,
 636                                 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
 637                 }
 638
 639                 for (i = 0; i < 8; i++)
 640                         input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
 641
 642                 input_report_key(dev, BTN_START,  ~data[0] & 0x08);
 643                 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
 644
 645                 input_sync(dev);
 646
 647                 break;
 648
 649         case GC_PSX_NORMAL:
 650                 if (gc->pads[GC_DDR] & status_bit) {
 651                         for (i = 0; i < 4; i++)
 652                                 input_report_key(dev, gc_psx_ddr_btn[i],
 653                                                  ~data[0] & (0x10 << i));
 654                 } else {
 655                         input_report_abs(dev, ABS_X,
 656                                 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
 657                         input_report_abs(dev, ABS_Y,
 658                                 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
 659
 660                         /*
 661                          * For some reason if the extra axes are left unset
 662                          * they drift.
 663                          * for (i = 0; i < 4; i++)
 664                                 input_report_abs(dev, gc_psx_abs[i + 2], 128);
 665                          * This needs to be debugged properly,
 666                          * maybe fuzz processing needs to be done
 667                          * in input_sync()
 668                          *                               --vojtech
 669                          */
 670                 }
 671
 672                 for (i = 0; i < 8; i++)
 673                         input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
 674
 675                 input_report_key(dev, BTN_START,  ~data[0] & 0x08);
 676                 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
 677
 678                 input_sync(dev);
 679
 680                 break;
 681
 682         case 0: /* not a pad, ignore */
 683                 break;
 684         }
 685 }
 686
 687 static void gc_psx_process_packet(struct gc *gc)
 688 {
 689         unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
 690         unsigned char id[GC_MAX_DEVICES];
 691         int i;
 692
 693         gc_psx_read_packet(gc, data, id);
 694
 695         for (i = 0; i < GC_MAX_DEVICES; i++) {
 696
 697                 if (gc->dev[i])
 698                         gc_psx_report_one(gc, gc->dev[i],
 699                                           id[i], gc_status_bit[i], data[i]);
 700         }
 701 }
 702
 703 /*
 704  * gc_timer() initiates reads of console pads data.
 705  */
 706
 707 static void gc_timer(unsigned long private)
 708 {
 709         struct gc *gc = (void *) private;
 710
 711 /*
 712  * N64 pads - must be read first, any read confuses them for 200 us
 713  */
 714
 715         if (gc->pads[GC_N64])
 716                 gc_n64_process_packet(gc);
 717
 718 /*
 719  * NES and SNES pads or mouse
 720  */
 721
 722         if (gc->pads[GC_NES] || gc->pads[GC_SNES] || gc->pads[GC_SNESMOUSE])
 723                 gc_nes_process_packet(gc);
 724
 725 /*
 726  * Multi and Multi2 joysticks
 727  */
 728
 729         if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2])
 730                 gc_multi_process_packet(gc);
 731
 732 /*
 733  * PSX controllers
 734  */
 735
 736         if (gc->pads[GC_PSX] || gc->pads[GC_DDR])
 737                 gc_psx_process_packet(gc);
 738
 739         mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 740 }
 741
 742 static int gc_open(struct input_dev *dev)
 743 {
 744         struct gc *gc = input_get_drvdata(dev);
 745         int err;
 746
 747         err = mutex_lock_interruptible(&gc->mutex);
 748         if (err)
 749                 return err;
 750
 751         if (!gc->used++) {
 752                 parport_claim(gc->pd);
 753                 parport_write_control(gc->pd->port, 0x04);
 754                 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 755         }
 756
 757         mutex_unlock(&gc->mutex);
 758         return 0;
 759 }
 760
 761 static void gc_close(struct input_dev *dev)
 762 {
 763         struct gc *gc = input_get_drvdata(dev);
 764
 765         mutex_lock(&gc->mutex);
 766         if (!--gc->used) {
 767                 del_timer_sync(&gc->timer);
 768                 parport_write_control(gc->pd->port, 0x00);
 769                 parport_release(gc->pd);
 770         }
 771         mutex_unlock(&gc->mutex);
 772 }
 773
 774 static int __init gc_setup_pad(struct gc *gc, int idx, int pad_type)
 775 {
 776         struct input_dev *input_dev;
 777         int i;
 778         int err;
 779
 780         if (!pad_type)
 781                 return 0;
 782
 783         if (pad_type < 1 || pad_type > GC_MAX) {
 784                 printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", pad_type);
 785                 return -EINVAL;
 786         }
 787
 788         gc->dev[idx] = input_dev = input_allocate_device();
 789         if (!input_dev) {
 790                 printk(KERN_ERR "gamecon.c: Not enough memory for input device\n");
 791                 return -ENOMEM;
 792         }
 793
 794         input_dev->name = gc_names[pad_type];
 795         input_dev->phys = gc->phys[idx];
 796         input_dev->id.bustype = BUS_PARPORT;
 797         input_dev->id.vendor = 0x0001;
 798         input_dev->id.product = pad_type;
 799         input_dev->id.version = 0x0100;
 800
 801         input_set_drvdata(input_dev, gc);
 802
 803         input_dev->open = gc_open;
 804         input_dev->close = gc_close;
 805
 806         if (pad_type != GC_SNESMOUSE) {
 807                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 808
 809                 for (i = 0; i < 2; i++)
 810                         input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
 811         } else
 812                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 813
 814         gc->pads[0] |= gc_status_bit[idx];
 815         gc->pads[pad_type] |= gc_status_bit[idx];
 816
 817         switch (pad_type) {
 818
 819         case GC_N64:
 820                 for (i = 0; i < 10; i++)
 821                         __set_bit(gc_n64_btn[i], input_dev->keybit);
 822
 823                 for (i = 0; i < 2; i++) {
 824                         input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
 825                         input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 826                 }
 827
 828                 err = gc_n64_init_ff(input_dev, idx);
 829                 if (err) {
 830                         printk(KERN_WARNING "gamecon.c: Failed to initiate rumble for N64 device %d\n", idx);
 831                         input_free_device(input_dev);
 832                         return err;
 833                 }
 834
 835                 break;
 836
 837         case GC_SNESMOUSE:
 838                 __set_bit(BTN_LEFT, input_dev->keybit);
 839                 __set_bit(BTN_RIGHT, input_dev->keybit);
 840                 __set_bit(REL_X, input_dev->relbit);
 841                 __set_bit(REL_Y, input_dev->relbit);
 842                 break;
 843
 844         case GC_SNES:
 845                 for (i = 4; i < 8; i++)
 846                         __set_bit(gc_snes_btn[i], input_dev->keybit);
 847         case GC_NES:
 848                 for (i = 0; i < 4; i++)
 849                         __set_bit(gc_snes_btn[i], input_dev->keybit);
 850                 break;
 851
 852         case GC_MULTI2:
 853                 __set_bit(BTN_THUMB, input_dev->keybit);
 854         case GC_MULTI:
 855                 __set_bit(BTN_TRIGGER, input_dev->keybit);
 856                 break;
 857
 858         case GC_PSX:
 859                 for (i = 0; i < 6; i++)
 860                         input_set_abs_params(input_dev,
 861                                              gc_psx_abs[i], 4, 252, 0, 2);
 862                 for (i = 0; i < 12; i++)
 863                         __set_bit(gc_psx_btn[i], input_dev->keybit);
 864
 865                 break;
 866
 867         case GC_DDR:
 868                 for (i = 0; i < 4; i++)
 869                         __set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
 870                 for (i = 0; i < 12; i++)
 871                         __set_bit(gc_psx_btn[i], input_dev->keybit);
 872
 873                 break;
 874         }
 875
 876         return 0;
 877 }
 878
 879 static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
 880 {
 881         struct gc *gc;
 882         struct parport *pp;
 883         struct pardevice *pd;
 884         int i;
 885         int err;
 886
 887         pp = parport_find_number(parport);
 888         if (!pp) {
 889                 printk(KERN_ERR "gamecon.c: no such parport\n");
 890                 err = -EINVAL;
 891                 goto err_out;
 892         }
 893
 894         pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
 895         if (!pd) {
 896                 printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
 897                 err = -EBUSY;
 898                 goto err_put_pp;
 899         }
 900
 901         gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
 902         if (!gc) {
 903                 printk(KERN_ERR "gamecon.c: Not enough memory\n");
 904                 err = -ENOMEM;
 905                 goto err_unreg_pardev;
 906         }
 907
 908         mutex_init(&gc->mutex);
 909         gc->pd = pd;
 910         setup_timer(&gc->timer, gc_timer, (long) gc);
 911
 912         for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
 913                 if (!pads[i])
 914                         continue;
 915
 916                 snprintf(gc->phys[i], sizeof(gc->phys[i]),
 917                          "%s/input%d", gc->pd->port->name, i);
 918                 err = gc_setup_pad(gc, i, pads[i]);
 919                 if (err)
 920                         goto err_unreg_devs;
 921
 922                 err = input_register_device(gc->dev[i]);
 923                 if (err)
 924                         goto err_free_dev;
 925         }
 926
 927         if (!gc->pads[0]) {
 928                 printk(KERN_ERR "gamecon.c: No valid devices specified\n");
 929                 err = -EINVAL;
 930                 goto err_free_gc;
 931         }
 932
 933         parport_put_port(pp);
 934         return gc;
 935
 936  err_free_dev:
 937         input_free_device(gc->dev[i]);
 938  err_unreg_devs:
 939         while (--i >= 0)
 940                 if (gc->dev[i])
 941                         input_unregister_device(gc->dev[i]);
 942  err_free_gc:
 943         kfree(gc);
 944  err_unreg_pardev:
 945         parport_unregister_device(pd);
 946  err_put_pp:
 947         parport_put_port(pp);
 948  err_out:
 949         return ERR_PTR(err);
 950 }
 951
 952 static void gc_remove(struct gc *gc)
 953 {
 954         int i;
 955
 956         for (i = 0; i < GC_MAX_DEVICES; i++)
 957                 if (gc->dev[i])
 958                         input_unregister_device(gc->dev[i]);
 959         parport_unregister_device(gc->pd);
 960         kfree(gc);
 961 }
 962
 963 static int __init gc_init(void)
 964 {
 965         int i;
 966         int have_dev = 0;
 967         int err = 0;
 968
 969         for (i = 0; i < GC_MAX_PORTS; i++) {
 970                 if (gc_cfg[i].nargs == 0 || gc_cfg[i].args[0] < 0)
 971                         continue;
 972
 973                 if (gc_cfg[i].nargs < 2) {
 974                         printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
 975                         err = -EINVAL;
 976                         break;
 977                 }
 978
 979                 gc_base[i] = gc_probe(gc_cfg[i].args[0],
 980                                       gc_cfg[i].args + 1, gc_cfg[i].nargs - 1);
 981                 if (IS_ERR(gc_base[i])) {
 982                         err = PTR_ERR(gc_base[i]);
 983                         break;
 984                 }
 985
 986                 have_dev = 1;
 987         }
 988
 989         if (err) {
 990                 while (--i >= 0)
 991                         if (gc_base[i])
 992                                 gc_remove(gc_base[i]);
 993                 return err;
 994         }
 995
 996         return have_dev ? 0 : -ENODEV;
 997 }
 998
 999 static void __exit gc_exit(void)
1000 {
1001         int i;
1002
1003         for (i = 0; i < GC_MAX_PORTS; i++)
1004                 if (gc_base[i])
1005                         gc_remove(gc_base[i]);
1006 }
1007
1008 module_init(gc_init);
1009 module_exit(gc_exit);