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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  34
  35 #include <linux/kernel.h>
  36 #include <linux/delay.h>
  37 #include <linux/module.h>
  38 #include <linux/init.h>
  39 #include <linux/parport.h>
  40 #include <linux/input.h>
  41 #include <linux/mutex.h>
  42 #include <linux/slab.h>
  43
  44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  45 MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
  46 MODULE_LICENSE("GPL");
  47
  48 #define GC_MAX_PORTS            3
  49 #define GC_MAX_DEVICES          5
  50
  51 struct gc_config {
  52         int args[GC_MAX_DEVICES + 1];
  53         unsigned int nargs;
  54 };
  55
  56 static struct gc_config gc_cfg[GC_MAX_PORTS];
  57
  58 module_param_array_named(map, gc_cfg[0].args, int, &gc_cfg[0].nargs, 0);
  59 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
  60 module_param_array_named(map2, gc_cfg[1].args, int, &gc_cfg[1].nargs, 0);
  61 MODULE_PARM_DESC(map2, "Describes second set of devices");
  62 module_param_array_named(map3, gc_cfg[2].args, int, &gc_cfg[2].nargs, 0);
  63 MODULE_PARM_DESC(map3, "Describes third set of devices");
  64
  65 /* see also gs_psx_delay parameter in PSX support section */
  66
  67 enum gc_type {
  68         GC_NONE = 0,
  69         GC_SNES,
  70         GC_NES,
  71         GC_NES4,
  72         GC_MULTI,
  73         GC_MULTI2,
  74         GC_N64,
  75         GC_PSX,
  76         GC_DDR,
  77         GC_SNESMOUSE,
  78         GC_MAX
  79 };
  80
  81 #define GC_REFRESH_TIME HZ/100
  82
  83 struct gc_pad {
  84         struct input_dev *dev;
  85         enum gc_type type;
  86         char phys[32];
  87 };
  88
  89 struct gc {
  90         struct pardevice *pd;
  91         struct gc_pad pads[GC_MAX_DEVICES];
  92         struct timer_list timer;
  93         int pad_count[GC_MAX];
  94         int used;
  95         int parportno;
  96         struct mutex mutex;
  97 };
  98
  99 struct gc_subdev {
 100         unsigned int idx;
 101 };
 102
 103 static struct gc *gc_base[3];
 104
 105 static const int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
 106
 107 static const char *gc_names[] = {
 108         NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
 109         "Multisystem 2-button joystick", "N64 controller", "PSX controller",
 110         "PSX DDR controller", "SNES mouse"
 111 };
 112
 113 /*
 114  * N64 support.
 115  */
 116
 117 static const unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
 118 static const short gc_n64_btn[] = {
 119         BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,
 120         BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START
 121 };
 122
 123 #define GC_N64_LENGTH           32              /* N64 bit length, not including stop bit */
 124 #define GC_N64_STOP_LENGTH      5               /* Length of encoded stop bit */
 125 #define GC_N64_CMD_00           0x11111111UL
 126 #define GC_N64_CMD_01           0xd1111111UL
 127 #define GC_N64_CMD_03           0xdd111111UL
 128 #define GC_N64_CMD_1b           0xdd1dd111UL
 129 #define GC_N64_CMD_c0           0x111111ddUL
 130 #define GC_N64_CMD_80           0x1111111dUL
 131 #define GC_N64_STOP_BIT         0x1d            /* Encoded stop bit */
 132 #define GC_N64_REQUEST_DATA     GC_N64_CMD_01   /* the request data command */
 133 #define GC_N64_DELAY            133             /* delay between transmit request, and response ready (us) */
 134 #define GC_N64_DWS              3               /* delay between write segments (required for sound playback because of ISA DMA) */
 135                                                 /* GC_N64_DWS > 24 is known to fail */
 136 #define GC_N64_POWER_W          0xe2            /* power during write (transmit request) */
 137 #define GC_N64_POWER_R          0xfd            /* power during read */
 138 #define GC_N64_OUT              0x1d            /* output bits to the 4 pads */
 139                                                 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
 140                                                 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
 141                                                 /* than 123 us */
 142 #define GC_N64_CLOCK            0x02            /* clock bits for read */
 143
 144 /*
 145  * Used for rumble code.
 146  */
 147
 148 /* Send encoded command */
 149 static void gc_n64_send_command(struct gc *gc, unsigned long cmd,
 150                                 unsigned char target)
 151 {
 152         struct parport *port = gc->pd->port;
 153         int i;
 154
 155         for (i = 0; i < GC_N64_LENGTH; i++) {
 156                 unsigned char data = (cmd >> i) & 1 ? target : 0;
 157                 parport_write_data(port, GC_N64_POWER_W | data);
 158                 udelay(GC_N64_DWS);
 159         }
 160 }
 161
 162 /* Send stop bit */
 163 static void gc_n64_send_stop_bit(struct gc *gc, unsigned char target)
 164 {
 165         struct parport *port = gc->pd->port;
 166         int i;
 167
 168         for (i = 0; i < GC_N64_STOP_LENGTH; i++) {
 169                 unsigned char data = (GC_N64_STOP_BIT >> i) & 1 ? target : 0;
 170                 parport_write_data(port, GC_N64_POWER_W | data);
 171                 udelay(GC_N64_DWS);
 172         }
 173 }
 174
 175 /*
 176  * gc_n64_read_packet() reads an N64 packet.
 177  * Each pad uses one bit per byte. So all pads connected to this port
 178  * are read in parallel.
 179  */
 180
 181 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
 182 {
 183         int i;
 184         unsigned long flags;
 185
 186 /*
 187  * Request the pad to transmit data
 188  */
 189
 190         local_irq_save(flags);
 191         gc_n64_send_command(gc, GC_N64_REQUEST_DATA, GC_N64_OUT);
 192         gc_n64_send_stop_bit(gc, GC_N64_OUT);
 193         local_irq_restore(flags);
 194
 195 /*
 196  * Wait for the pad response to be loaded into the 33-bit register
 197  * of the adapter.
 198  */
 199
 200         udelay(GC_N64_DELAY);
 201
 202 /*
 203  * Grab data (ignoring the last bit, which is a stop bit)
 204  */
 205
 206         for (i = 0; i < GC_N64_LENGTH; i++) {
 207                 parport_write_data(gc->pd->port, GC_N64_POWER_R);
 208                 udelay(2);
 209                 data[i] = parport_read_status(gc->pd->port);
 210                 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
 211          }
 212
 213 /*
 214  * We must wait 200 ms here for the controller to reinitialize before
 215  * the next read request. No worries as long as gc_read is polled less
 216  * frequently than this.
 217  */
 218
 219 }
 220
 221 static void gc_n64_process_packet(struct gc *gc)
 222 {
 223         unsigned char data[GC_N64_LENGTH];
 224         struct input_dev *dev;
 225         int i, j, s;
 226         signed char x, y;
 227
 228         gc_n64_read_packet(gc, data);
 229
 230         for (i = 0; i < GC_MAX_DEVICES; i++) {
 231
 232                 if (gc->pads[i].type != GC_N64)
 233                         continue;
 234
 235                 dev = gc->pads[i].dev;
 236                 s = gc_status_bit[i];
 237
 238                 if (s & ~(data[8] | data[9])) {
 239
 240                         x = y = 0;
 241
 242                         for (j = 0; j < 8; j++) {
 243                                 if (data[23 - j] & s)
 244                                         x |= 1 << j;
 245                                 if (data[31 - j] & s)
 246                                         y |= 1 << j;
 247                         }
 248
 249                         input_report_abs(dev, ABS_X,  x);
 250                         input_report_abs(dev, ABS_Y, -y);
 251
 252                         input_report_abs(dev, ABS_HAT0X,
 253                                          !(s & data[6]) - !(s & data[7]));
 254                         input_report_abs(dev, ABS_HAT0Y,
 255                                          !(s & data[4]) - !(s & data[5]));
 256
 257                         for (j = 0; j < 10; j++)
 258                                 input_report_key(dev, gc_n64_btn[j],
 259                                                  s & data[gc_n64_bytes[j]]);
 260
 261                         input_sync(dev);
 262                 }
 263         }
 264 }
 265
 266 static int gc_n64_play_effect(struct input_dev *dev, void *data,
 267                               struct ff_effect *effect)
 268 {
 269         int i;
 270         unsigned long flags;
 271         struct gc *gc = input_get_drvdata(dev);
 272         struct gc_subdev *sdev = data;
 273         unsigned char target = 1 << sdev->idx; /* select desired pin */
 274
 275         if (effect->type == FF_RUMBLE) {
 276                 struct ff_rumble_effect *rumble = &effect->u.rumble;
 277                 unsigned int cmd =
 278                         rumble->strong_magnitude || rumble->weak_magnitude ?
 279                         GC_N64_CMD_01 : GC_N64_CMD_00;
 280
 281                 local_irq_save(flags);
 282
 283                 /* Init Rumble - 0x03, 0x80, 0x01, (34)0x80 */
 284                 gc_n64_send_command(gc, GC_N64_CMD_03, target);
 285                 gc_n64_send_command(gc, GC_N64_CMD_80, target);
 286                 gc_n64_send_command(gc, GC_N64_CMD_01, target);
 287                 for (i = 0; i < 32; i++)
 288                         gc_n64_send_command(gc, GC_N64_CMD_80, target);
 289                 gc_n64_send_stop_bit(gc, target);
 290
 291                 udelay(GC_N64_DELAY);
 292
 293                 /* Now start or stop it - 0x03, 0xc0, 0zx1b, (32)0x01/0x00 */
 294                 gc_n64_send_command(gc, GC_N64_CMD_03, target);
 295                 gc_n64_send_command(gc, GC_N64_CMD_c0, target);
 296                 gc_n64_send_command(gc, GC_N64_CMD_1b, target);
 297                 for (i = 0; i < 32; i++)
 298                         gc_n64_send_command(gc, cmd, target);
 299                 gc_n64_send_stop_bit(gc, target);
 300
 301                 local_irq_restore(flags);
 302
 303         }
 304
 305         return 0;
 306 }
 307
 308 static int gc_n64_init_ff(struct input_dev *dev, int i)
 309 {
 310         struct gc_subdev *sdev;
 311         int err;
 312
 313         sdev = kmalloc(sizeof(*sdev), GFP_KERNEL);
 314         if (!sdev)
 315                 return -ENOMEM;
 316
 317         sdev->idx = i;
 318
 319         input_set_capability(dev, EV_FF, FF_RUMBLE);
 320
 321         err = input_ff_create_memless(dev, sdev, gc_n64_play_effect);
 322         if (err) {
 323                 kfree(sdev);
 324                 return err;
 325         }
 326
 327         return 0;
 328 }
 329
 330 /*
 331  * NES/SNES support.
 332  */
 333
 334 #define GC_NES_DELAY            6       /* Delay between bits - 6us */
 335 #define GC_NES_LENGTH           8       /* The NES pads use 8 bits of data */
 336 #define GC_SNES_LENGTH          12      /* The SNES true length is 16, but the
 337                                            last 4 bits are unused */
 338 #define GC_SNESMOUSE_LENGTH     32      /* The SNES mouse uses 32 bits, the first
 339                                            16 bits are equivalent to a gamepad */
 340
 341 #define GC_NES_POWER    0xfc
 342 #define GC_NES_CLOCK    0x01
 343 #define GC_NES_LATCH    0x02
 344
 345 static const unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
 346 static const unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
 347 static const short gc_snes_btn[] = {
 348         BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR
 349 };
 350
 351 /*
 352  * gc_nes_read_packet() reads a NES/SNES packet.
 353  * Each pad uses one bit per byte. So all pads connected to
 354  * this port are read in parallel.
 355  */
 356
 357 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
 358 {
 359         int i;
 360
 361         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
 362         udelay(GC_NES_DELAY * 2);
 363         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 364
 365         for (i = 0; i < length; i++) {
 366                 udelay(GC_NES_DELAY);
 367                 parport_write_data(gc->pd->port, GC_NES_POWER);
 368                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 369                 udelay(GC_NES_DELAY);
 370                 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
 371         }
 372 }
 373
 374 static void gc_nes_process_packet(struct gc *gc)
 375 {
 376         unsigned char data[GC_SNESMOUSE_LENGTH];
 377         struct gc_pad *pad;
 378         struct input_dev *dev;
 379         int i, j, s, len;
 380         char x_rel, y_rel;
 381
 382         len = gc->pad_count[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
 383                         (gc->pad_count[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
 384
 385         gc_nes_read_packet(gc, len, data);
 386
 387         for (i = 0; i < GC_MAX_DEVICES; i++) {
 388
 389                 pad = &gc->pads[i];
 390                 dev = pad->dev;
 391                 s = gc_status_bit[i];
 392
 393                 switch (pad->type) {
 394
 395                 case GC_NES:
 396
 397                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
 398                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
 399
 400                         for (j = 0; j < 4; j++)
 401                                 input_report_key(dev, gc_snes_btn[j],
 402                                                  s & data[gc_nes_bytes[j]]);
 403                         input_sync(dev);
 404                         break;
 405
 406                 case GC_SNES:
 407
 408                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
 409                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
 410
 411                         for (j = 0; j < 8; j++)
 412                                 input_report_key(dev, gc_snes_btn[j],
 413                                                  s & data[gc_snes_bytes[j]]);
 414                         input_sync(dev);
 415                         break;
 416
 417                 case GC_SNESMOUSE:
 418                         /*
 419                          * The 4 unused bits from SNES controllers appear
 420                          * to be ID bits so use them to make sure we are
 421                          * dealing with a mouse.
 422                          * gamepad is connected. This is important since
 423                          * my SNES gamepad sends 1's for bits 16-31, which
 424                          * cause the mouse pointer to quickly move to the
 425                          * upper left corner of the screen.
 426                          */
 427                         if (!(s & data[12]) && !(s & data[13]) &&
 428                             !(s & data[14]) && (s & data[15])) {
 429                                 input_report_key(dev, BTN_LEFT, s & data[9]);
 430                                 input_report_key(dev, BTN_RIGHT, s & data[8]);
 431
 432                                 x_rel = y_rel = 0;
 433                                 for (j = 0; j < 7; j++) {
 434                                         x_rel <<= 1;
 435                                         if (data[25 + j] & s)
 436                                                 x_rel |= 1;
 437
 438                                         y_rel <<= 1;
 439                                         if (data[17 + j] & s)
 440                                                 y_rel |= 1;
 441                                 }
 442
 443                                 if (x_rel) {
 444                                         if (data[24] & s)
 445                                                 x_rel = -x_rel;
 446                                         input_report_rel(dev, REL_X, x_rel);
 447                                 }
 448
 449                                 if (y_rel) {
 450                                         if (data[16] & s)
 451                                                 y_rel = -y_rel;
 452                                         input_report_rel(dev, REL_Y, y_rel);
 453                                 }
 454
 455                                 input_sync(dev);
 456                         }
 457                         break;
 458
 459                 default:
 460                         break;
 461                 }
 462         }
 463 }
 464
 465 /*
 466  * Multisystem joystick support
 467  */
 468
 469 #define GC_MULTI_LENGTH         5       /* Multi system joystick packet length is 5 */
 470 #define GC_MULTI2_LENGTH        6       /* One more bit for one more button */
 471
 472 /*
 473  * gc_multi_read_packet() reads a Multisystem joystick packet.
 474  */
 475
 476 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
 477 {
 478         int i;
 479
 480         for (i = 0; i < length; i++) {
 481                 parport_write_data(gc->pd->port, ~(1 << i));
 482                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
 483         }
 484 }
 485
 486 static void gc_multi_process_packet(struct gc *gc)
 487 {
 488         unsigned char data[GC_MULTI2_LENGTH];
 489         int data_len = gc->pad_count[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH;
 490         struct gc_pad *pad;
 491         struct input_dev *dev;
 492         int i, s;
 493
 494         gc_multi_read_packet(gc, data_len, data);
 495
 496         for (i = 0; i < GC_MAX_DEVICES; i++) {
 497                 pad = &gc->pads[i];
 498                 dev = pad->dev;
 499                 s = gc_status_bit[i];
 500
 501                 switch (pad->type) {
 502                 case GC_MULTI2:
 503                         input_report_key(dev, BTN_THUMB, s & data[5]);
 504                         /* fall through */
 505
 506                 case GC_MULTI:
 507                         input_report_abs(dev, ABS_X,
 508                                          !(s & data[2]) - !(s & data[3]));
 509                         input_report_abs(dev, ABS_Y,
 510                                          !(s & data[0]) - !(s & data[1]));
 511                         input_report_key(dev, BTN_TRIGGER, s & data[4]);
 512                         input_sync(dev);
 513                         break;
 514
 515                 default:
 516                         break;
 517                 }
 518         }
 519 }
 520
 521 /*
 522  * PSX support
 523  *
 524  * See documentation at:
 525  *      http://www.geocities.co.jp/Playtown/2004/psx/ps_eng.txt
 526  *      http://www.gamesx.com/controldata/psxcont/psxcont.htm
 527  *
 528  */
 529
 530 #define GC_PSX_DELAY    25              /* 25 usec */
 531 #define GC_PSX_LENGTH   8               /* talk to the controller in bits */
 532 #define GC_PSX_BYTES    6               /* the maximum number of bytes to read off the controller */
 533
 534 #define GC_PSX_MOUSE    1               /* Mouse */
 535 #define GC_PSX_NEGCON   2               /* NegCon */
 536 #define GC_PSX_NORMAL   4               /* Digital / Analog or Rumble in Digital mode  */
 537 #define GC_PSX_ANALOG   5               /* Analog in Analog mode / Rumble in Green mode */
 538 #define GC_PSX_RUMBLE   7               /* Rumble in Red mode */
 539
 540 #define GC_PSX_CLOCK    0x04            /* Pin 4 */
 541 #define GC_PSX_COMMAND  0x01            /* Pin 2 */
 542 #define GC_PSX_POWER    0xf8            /* Pins 5-9 */
 543 #define GC_PSX_SELECT   0x02            /* Pin 3 */
 544
 545 #define GC_PSX_ID(x)    ((x) >> 4)      /* High nibble is device type */
 546 #define GC_PSX_LEN(x)   (((x) & 0xf) << 1)      /* Low nibble is length in bytes/2 */
 547
 548 static int gc_psx_delay = GC_PSX_DELAY;
 549 module_param_named(psx_delay, gc_psx_delay, uint, 0);
 550 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
 551
 552 static const short gc_psx_abs[] = {
 553         ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y
 554 };
 555 static const short gc_psx_btn[] = {
 556         BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
 557         BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR
 558 };
 559 static const short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
 560
 561 /*
 562  * gc_psx_command() writes 8bit command and reads 8bit data from
 563  * the psx pad.
 564  */
 565
 566 static void gc_psx_command(struct gc *gc, int b, unsigned char *data)
 567 {
 568         struct parport *port = gc->pd->port;
 569         int i, j, cmd, read;
 570
 571         memset(data, 0, GC_MAX_DEVICES);
 572
 573         for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
 574                 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
 575                 parport_write_data(port, cmd | GC_PSX_POWER);
 576                 udelay(gc_psx_delay);
 577
 578                 read = parport_read_status(port) ^ 0x80;
 579
 580                 for (j = 0; j < GC_MAX_DEVICES; j++) {
 581                         struct gc_pad *pad = &gc->pads[j];
 582
 583                         if (pad->type == GC_PSX || pad->type == GC_DDR)
 584                                 data[j] |= (read & gc_status_bit[j]) ? (1 << i) : 0;
 585                 }
 586
 587                 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
 588                 udelay(gc_psx_delay);
 589         }
 590 }
 591
 592 /*
 593  * gc_psx_read_packet() reads a whole psx packet and returns
 594  * device identifier code.
 595  */
 596
 597 static void gc_psx_read_packet(struct gc *gc,
 598                                unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
 599                                unsigned char id[GC_MAX_DEVICES])
 600 {
 601         int i, j, max_len = 0;
 602         unsigned long flags;
 603         unsigned char data2[GC_MAX_DEVICES];
 604
 605         /* Select pad */
 606         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 607         udelay(gc_psx_delay);
 608         /* Deselect, begin command */
 609         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);
 610         udelay(gc_psx_delay);
 611
 612         local_irq_save(flags);
 613
 614         gc_psx_command(gc, 0x01, data2);        /* Access pad */
 615         gc_psx_command(gc, 0x42, id);           /* Get device ids */
 616         gc_psx_command(gc, 0, data2);           /* Dump status */
 617
 618         /* Find the longest pad */
 619         for (i = 0; i < GC_MAX_DEVICES; i++) {
 620                 struct gc_pad *pad = &gc->pads[i];
 621
 622                 if ((pad->type == GC_PSX || pad->type == GC_DDR) &&
 623                     GC_PSX_LEN(id[i]) > max_len &&
 624                     GC_PSX_LEN(id[i]) <= GC_PSX_BYTES) {
 625                         max_len = GC_PSX_LEN(id[i]);
 626                 }
 627         }
 628
 629         /* Read in all the data */
 630         for (i = 0; i < max_len; i++) {
 631                 gc_psx_command(gc, 0, data2);
 632                 for (j = 0; j < GC_MAX_DEVICES; j++)
 633                         data[j][i] = data2[j];
 634         }
 635
 636         local_irq_restore(flags);
 637
 638         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
 639
 640         /* Set id's to the real value */
 641         for (i = 0; i < GC_MAX_DEVICES; i++)
 642                 id[i] = GC_PSX_ID(id[i]);
 643 }
 644
 645 static void gc_psx_report_one(struct gc_pad *pad, unsigned char psx_type,
 646                               unsigned char *data)
 647 {
 648         struct input_dev *dev = pad->dev;
 649         int i;
 650
 651         switch (psx_type) {
 652
 653         case GC_PSX_RUMBLE:
 654
 655                 input_report_key(dev, BTN_THUMBL, ~data[0] & 0x04);
 656                 input_report_key(dev, BTN_THUMBR, ~data[0] & 0x02);
 657                 /* fall through */
 658
 659         case GC_PSX_NEGCON:
 660         case GC_PSX_ANALOG:
 661
 662                 if (pad->type == GC_DDR) {
 663                         for (i = 0; i < 4; i++)
 664                                 input_report_key(dev, gc_psx_ddr_btn[i],
 665                                                  ~data[0] & (0x10 << i));
 666                 } else {
 667                         for (i = 0; i < 4; i++)
 668                                 input_report_abs(dev, gc_psx_abs[i + 2],
 669                                                  data[i + 2]);
 670
 671                         input_report_abs(dev, ABS_X,
 672                                 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
 673                         input_report_abs(dev, ABS_Y,
 674                                 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
 675                 }
 676
 677                 for (i = 0; i < 8; i++)
 678                         input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
 679
 680                 input_report_key(dev, BTN_START,  ~data[0] & 0x08);
 681                 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
 682
 683                 input_sync(dev);
 684
 685                 break;
 686
 687         case GC_PSX_NORMAL:
 688
 689                 if (pad->type == GC_DDR) {
 690                         for (i = 0; i < 4; i++)
 691                                 input_report_key(dev, gc_psx_ddr_btn[i],
 692                                                  ~data[0] & (0x10 << i));
 693                 } else {
 694                         input_report_abs(dev, ABS_X,
 695                                 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
 696                         input_report_abs(dev, ABS_Y,
 697                                 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
 698
 699                         /*
 700                          * For some reason if the extra axes are left unset
 701                          * they drift.
 702                          * for (i = 0; i < 4; i++)
 703                                 input_report_abs(dev, gc_psx_abs[i + 2], 128);
 704                          * This needs to be debugged properly,
 705                          * maybe fuzz processing needs to be done
 706                          * in input_sync()
 707                          *                               --vojtech
 708                          */
 709                 }
 710
 711                 for (i = 0; i < 8; i++)
 712                         input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
 713
 714                 input_report_key(dev, BTN_START,  ~data[0] & 0x08);
 715                 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
 716
 717                 input_sync(dev);
 718
 719                 break;
 720
 721         default: /* not a pad, ignore */
 722                 break;
 723         }
 724 }
 725
 726 static void gc_psx_process_packet(struct gc *gc)
 727 {
 728         unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
 729         unsigned char id[GC_MAX_DEVICES];
 730         struct gc_pad *pad;
 731         int i;
 732
 733         gc_psx_read_packet(gc, data, id);
 734
 735         for (i = 0; i < GC_MAX_DEVICES; i++) {
 736                 pad = &gc->pads[i];
 737                 if (pad->type == GC_PSX || pad->type == GC_DDR)
 738                         gc_psx_report_one(pad, id[i], data[i]);
 739         }
 740 }
 741
 742 /*
 743  * gc_timer() initiates reads of console pads data.
 744  */
 745
 746 static void gc_timer(struct timer_list *t)
 747 {
 748         struct gc *gc = from_timer(gc, t, timer);
 749
 750 /*
 751  * N64 pads - must be read first, any read confuses them for 200 us
 752  */
 753
 754         if (gc->pad_count[GC_N64])
 755                 gc_n64_process_packet(gc);
 756
 757 /*
 758  * NES and SNES pads or mouse
 759  */
 760
 761         if (gc->pad_count[GC_NES] ||
 762             gc->pad_count[GC_SNES] ||
 763             gc->pad_count[GC_SNESMOUSE]) {
 764                 gc_nes_process_packet(gc);
 765         }
 766
 767 /*
 768  * Multi and Multi2 joysticks
 769  */
 770
 771         if (gc->pad_count[GC_MULTI] || gc->pad_count[GC_MULTI2])
 772                 gc_multi_process_packet(gc);
 773
 774 /*
 775  * PSX controllers
 776  */
 777
 778         if (gc->pad_count[GC_PSX] || gc->pad_count[GC_DDR])
 779                 gc_psx_process_packet(gc);
 780
 781         mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 782 }
 783
 784 static int gc_open(struct input_dev *dev)
 785 {
 786         struct gc *gc = input_get_drvdata(dev);
 787         int err;
 788
 789         err = mutex_lock_interruptible(&gc->mutex);
 790         if (err)
 791                 return err;
 792
 793         if (!gc->used++) {
 794                 parport_claim(gc->pd);
 795                 parport_write_control(gc->pd->port, 0x04);
 796                 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
 797         }
 798
 799         mutex_unlock(&gc->mutex);
 800         return 0;
 801 }
 802
 803 static void gc_close(struct input_dev *dev)
 804 {
 805         struct gc *gc = input_get_drvdata(dev);
 806
 807         mutex_lock(&gc->mutex);
 808         if (!--gc->used) {
 809                 del_timer_sync(&gc->timer);
 810                 parport_write_control(gc->pd->port, 0x00);
 811                 parport_release(gc->pd);
 812         }
 813         mutex_unlock(&gc->mutex);
 814 }
 815
 816 static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
 817 {
 818         struct gc_pad *pad = &gc->pads[idx];
 819         struct input_dev *input_dev;
 820         int i;
 821         int err;
 822
 823         if (pad_type < 1 || pad_type >= GC_MAX) {
 824                 pr_err("Pad type %d unknown\n", pad_type);
 825                 return -EINVAL;
 826         }
 827
 828         pad->dev = input_dev = input_allocate_device();
 829         if (!input_dev) {
 830                 pr_err("Not enough memory for input device\n");
 831                 return -ENOMEM;
 832         }
 833
 834         pad->type = pad_type;
 835
 836         snprintf(pad->phys, sizeof(pad->phys),
 837                  "%s/input%d", gc->pd->port->name, idx);
 838
 839         input_dev->name = gc_names[pad_type];
 840         input_dev->phys = pad->phys;
 841         input_dev->id.bustype = BUS_PARPORT;
 842         input_dev->id.vendor = 0x0001;
 843         input_dev->id.product = pad_type;
 844         input_dev->id.version = 0x0100;
 845
 846         input_set_drvdata(input_dev, gc);
 847
 848         input_dev->open = gc_open;
 849         input_dev->close = gc_close;
 850
 851         if (pad_type != GC_SNESMOUSE) {
 852                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 853
 854                 for (i = 0; i < 2; i++)
 855                         input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
 856         } else
 857                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 858
 859         gc->pad_count[pad_type]++;
 860
 861         switch (pad_type) {
 862
 863         case GC_N64:
 864                 for (i = 0; i < 10; i++)
 865                         __set_bit(gc_n64_btn[i], input_dev->keybit);
 866
 867                 for (i = 0; i < 2; i++) {
 868                         input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
 869                         input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 870                 }
 871
 872                 err = gc_n64_init_ff(input_dev, idx);
 873                 if (err) {
 874                         pr_warn("Failed to initiate rumble for N64 device %d\n",
 875                                 idx);
 876                         goto err_free_dev;
 877                 }
 878
 879                 break;
 880
 881         case GC_SNESMOUSE:
 882                 __set_bit(BTN_LEFT, input_dev->keybit);
 883                 __set_bit(BTN_RIGHT, input_dev->keybit);
 884                 __set_bit(REL_X, input_dev->relbit);
 885                 __set_bit(REL_Y, input_dev->relbit);
 886                 break;
 887
 888         case GC_SNES:
 889                 for (i = 4; i < 8; i++)
 890                         __set_bit(gc_snes_btn[i], input_dev->keybit);
 891                 /* fall through */
 892         case GC_NES:
 893                 for (i = 0; i < 4; i++)
 894                         __set_bit(gc_snes_btn[i], input_dev->keybit);
 895                 break;
 896
 897         case GC_MULTI2:
 898                 __set_bit(BTN_THUMB, input_dev->keybit);
 899                 /* fall through */
 900         case GC_MULTI:
 901                 __set_bit(BTN_TRIGGER, input_dev->keybit);
 902                 break;
 903
 904         case GC_PSX:
 905                 for (i = 0; i < 6; i++)
 906                         input_set_abs_params(input_dev,
 907                                              gc_psx_abs[i], 4, 252, 0, 2);
 908                 for (i = 0; i < 12; i++)
 909                         __set_bit(gc_psx_btn[i], input_dev->keybit);
 910
 911                 break;
 912
 913         case GC_DDR:
 914                 for (i = 0; i < 4; i++)
 915                         __set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
 916                 for (i = 0; i < 12; i++)
 917                         __set_bit(gc_psx_btn[i], input_dev->keybit);
 918
 919                 break;
 920         }
 921
 922         err = input_register_device(pad->dev);
 923         if (err)
 924                 goto err_free_dev;
 925
 926         return 0;
 927
 928 err_free_dev:
 929         input_free_device(pad->dev);
 930         pad->dev = NULL;
 931         return err;
 932 }
 933
 934 static void gc_attach(struct parport *pp)
 935 {
 936         struct gc *gc;
 937         struct pardevice *pd;
 938         int i, port_idx;
 939         int count = 0;
 940         int *pads, n_pads;
 941         struct pardev_cb gc_parport_cb;
 942
 943         for (port_idx = 0; port_idx < GC_MAX_PORTS; port_idx++) {
 944                 if (gc_cfg[port_idx].nargs == 0 || gc_cfg[port_idx].args[0] < 0)
 945                         continue;
 946
 947                 if (gc_cfg[port_idx].args[0] == pp->number)
 948                         break;
 949         }
 950
 951         if (port_idx == GC_MAX_PORTS) {
 952                 pr_debug("Not using parport%d.\n", pp->number);
 953                 return;
 954         }
 955         pads = gc_cfg[port_idx].args + 1;
 956         n_pads = gc_cfg[port_idx].nargs - 1;
 957
 958         memset(&gc_parport_cb, 0, sizeof(gc_parport_cb));
 959         gc_parport_cb.flags = PARPORT_FLAG_EXCL;
 960
 961         pd = parport_register_dev_model(pp, "gamecon", &gc_parport_cb,
 962                                         port_idx);
 963         if (!pd) {
 964                 pr_err("parport busy already - lp.o loaded?\n");
 965                 return;
 966         }
 967
 968         gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
 969         if (!gc) {
 970                 pr_err("Not enough memory\n");
 971                 goto err_unreg_pardev;
 972         }
 973
 974         mutex_init(&gc->mutex);
 975         gc->pd = pd;
 976         gc->parportno = pp->number;
 977         timer_setup(&gc->timer, gc_timer, 0);
 978
 979         for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
 980                 if (!pads[i])
 981                         continue;
 982
 983                 if (gc_setup_pad(gc, i, pads[i]))
 984                         goto err_unreg_devs;
 985
 986                 count++;
 987         }
 988
 989         if (count == 0) {
 990                 pr_err("No valid devices specified\n");
 991                 goto err_free_gc;
 992         }
 993
 994         gc_base[port_idx] = gc;
 995         return;
 996
 997  err_unreg_devs:
 998         while (--i >= 0)
 999                 if (gc->pads[i].dev)
1000                         input_unregister_device(gc->pads[i].dev);
1001  err_free_gc:
1002         kfree(gc);
1003  err_unreg_pardev:
1004         parport_unregister_device(pd);
1005 }
1006
1007 static void gc_detach(struct parport *port)
1008 {
1009         int i;
1010         struct gc *gc;
1011
1012         for (i = 0; i < GC_MAX_PORTS; i++) {
1013                 if (gc_base[i] && gc_base[i]->parportno == port->number)
1014                         break;
1015         }
1016
1017         if (i == GC_MAX_PORTS)
1018                 return;
1019
1020         gc = gc_base[i];
1021         gc_base[i] = NULL;
1022
1023         for (i = 0; i < GC_MAX_DEVICES; i++)
1024                 if (gc->pads[i].dev)
1025                         input_unregister_device(gc->pads[i].dev);
1026         parport_unregister_device(gc->pd);
1027         kfree(gc);
1028 }
1029
1030 static struct parport_driver gc_parport_driver = {
1031         .name = "gamecon",
1032         .match_port = gc_attach,
1033         .detach = gc_detach,
1034         .devmodel = true,
1035 };
1036
1037 static int __init gc_init(void)
1038 {
1039         int i;
1040         int have_dev = 0;
1041
1042         for (i = 0; i < GC_MAX_PORTS; i++) {
1043                 if (gc_cfg[i].nargs == 0 || gc_cfg[i].args[0] < 0)
1044                         continue;
1045
1046                 if (gc_cfg[i].nargs < 2) {
1047                         pr_err("at least one device must be specified\n");
1048                         return -EINVAL;
1049                 }
1050
1051                 have_dev = 1;
1052         }
1053
1054         if (!have_dev)
1055                 return -ENODEV;
1056
1057         return parport_register_driver(&gc_parport_driver);
1058 }
1059
1060 static void __exit gc_exit(void)
1061 {
1062         parport_unregister_driver(&gc_parport_driver);
1063 }
1064
1065 module_init(gc_init);
1066 module_exit(gc_exit);