aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/input/joystick/gamecon.c
blob: 462fc38f026e287d08daf5b8054d4d6cc6cb4893 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
/*
 * NES, SNES, N64, MultiSystem, PSX gamepad driver for Linux
 *
 *  Copyright (c) 1999-2004	Vojtech Pavlik <vojtech@suse.cz>
 *  Copyright (c) 2004		Peter Nelson <rufus-kernel@hackish.org>
 *
 *  Based on the work of:
 *	Andree Borrmann		John Dahlstrom
 *	David Kuder		Nathan Hand
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/parport.h>
#include <linux/input.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
MODULE_LICENSE("GPL");

static int gc[] __initdata = { -1, 0, 0, 0, 0, 0 };
static int gc_nargs __initdata = 0;
module_param_array_named(map, gc, int, &gc_nargs, 0);
MODULE_PARM_DESC(map, "Describers first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");

static int gc_2[] __initdata = { -1, 0, 0, 0, 0, 0 };
static int gc_nargs_2 __initdata = 0;
module_param_array_named(map2, gc_2, int, &gc_nargs_2, 0);
MODULE_PARM_DESC(map2, "Describers second set of devices");

static int gc_3[] __initdata = { -1, 0, 0, 0, 0, 0 };
static int gc_nargs_3 __initdata = 0;
module_param_array_named(map3, gc_3, int, &gc_nargs_3, 0);
MODULE_PARM_DESC(map3, "Describers third set of devices");

__obsolete_setup("gc=");
__obsolete_setup("gc_2=");
__obsolete_setup("gc_3=");

/* see also gs_psx_delay parameter in PSX support section */

#define GC_SNES		1
#define GC_NES		2
#define GC_NES4		3
#define GC_MULTI	4
#define GC_MULTI2	5
#define GC_N64		6
#define GC_PSX		7
#define GC_DDR		8

#define GC_MAX		8

#define GC_REFRESH_TIME	HZ/100

struct gc {
	struct pardevice *pd;
	struct input_dev dev[5];
	struct timer_list timer;
	unsigned char pads[GC_MAX + 1];
	int used;
	char phys[5][32];
};

static struct gc *gc_base[3];

static int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };

static char *gc_names[] = { NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
				"Multisystem 2-button joystick", "N64 controller", "PSX controller",
				"PSX DDR controller" };
/*
 * N64 support.
 */

static unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
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 };

#define GC_N64_LENGTH		32		/* N64 bit length, not including stop bit */
#define GC_N64_REQUEST_LENGTH	37		/* transmit request sequence is 9 bits long */
#define GC_N64_DELAY		133		/* delay between transmit request, and response ready (us) */
#define GC_N64_REQUEST		0x1dd1111111ULL /* the request data command (encoded for 000000011) */
#define GC_N64_DWS		3		/* delay between write segments (required for sound playback because of ISA DMA) */
						/* GC_N64_DWS > 24 is known to fail */
#define GC_N64_POWER_W		0xe2		/* power during write (transmit request) */
#define GC_N64_POWER_R		0xfd		/* power during read */
#define GC_N64_OUT		0x1d		/* output bits to the 4 pads */
						/* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
						/* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
						/* than 123 us */
#define GC_N64_CLOCK		0x02		/* clock bits for read */

/*
 * gc_n64_read_packet() reads an N64 packet.
 * Each pad uses one bit per byte. So all pads connected to this port are read in parallel.
 */

static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
{
	int i;
	unsigned long flags;

/*
 * Request the pad to transmit data
 */

	local_irq_save(flags);
	for (i = 0; i < GC_N64_REQUEST_LENGTH; i++) {
		parport_write_data(gc->pd->port, GC_N64_POWER_W | ((GC_N64_REQUEST >> i) & 1 ? GC_N64_OUT : 0));
		udelay(GC_N64_DWS);
	}
	local_irq_restore(flags);

/*
 * Wait for the pad response to be loaded into the 33-bit register of the adapter
 */

	udelay(GC_N64_DELAY);

/*
 * Grab data (ignoring the last bit, which is a stop bit)
 */

	for (i = 0; i < GC_N64_LENGTH; i++) {
		parport_write_data(gc->pd->port, GC_N64_POWER_R);
		data[i] = parport_read_status(gc->pd->port);
		parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
	 }

/*
 * We must wait 200 ms here for the controller to reinitialize before the next read request.
 * No worries as long as gc_read is polled less frequently than this.
 */

}

/*
 * NES/SNES support.
 */

#define GC_NES_DELAY	6	/* Delay between bits - 6us */
#define GC_NES_LENGTH	8	/* The NES pads use 8 bits of data */
#define GC_SNES_LENGTH	12	/* The SNES true length is 16, but the last 4 bits are unused */

#define GC_NES_POWER	0xfc
#define GC_NES_CLOCK	0x01
#define GC_NES_LATCH	0x02

static unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
static unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
static short gc_snes_btn[] = { BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR };

/*
 * gc_nes_read_packet() reads a NES/SNES packet.
 * Each pad uses one bit per byte. So all pads connected to
 * this port are read in parallel.
 */

static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
{
	int i;

	parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
	udelay(GC_NES_DELAY * 2);
	parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);

	for (i = 0; i < length; i++) {
		udelay(GC_NES_DELAY);
		parport_write_data(gc->pd->port, GC_NES_POWER);
		data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
		udelay(GC_NES_DELAY);
		parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
	}
}

/*
 * Multisystem joystick support
 */

#define GC_MULTI_LENGTH		5	/* Multi system joystick packet length is 5 */
#define GC_MULTI2_LENGTH	6	/* One more bit for one more button */

/*
 * gc_multi_read_packet() reads a Multisystem joystick packet.
 */

static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
{
	int i;

	for (i = 0; i < length; i++) {
		parport_write_data(gc->pd->port, ~(1 << i));
		data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
	}
}

/*
 * PSX support
 *
 * See documentation at:
 *	http://www.dim.com/~mackys/psxmemcard/ps-eng2.txt
 *	http://www.gamesx.com/controldata/psxcont/psxcont.htm
 *	ftp://milano.usal.es/pablo/
 *
 */

#define GC_PSX_DELAY	25		/* 25 usec */
#define GC_PSX_LENGTH	8		/* talk to the controller in bits */
#define GC_PSX_BYTES	6		/* the maximum number of bytes to read off the controller */

#define GC_PSX_MOUSE	1		/* Mouse */
#define GC_PSX_NEGCON	2		/* NegCon */
#define GC_PSX_NORMAL	4		/* Digital / Analog or Rumble in Digital mode  */
#define GC_PSX_ANALOG	5		/* Analog in Analog mode / Rumble in Green mode */
#define GC_PSX_RUMBLE	7		/* Rumble in Red mode */

#define GC_PSX_CLOCK	0x04		/* Pin 4 */
#define GC_PSX_COMMAND	0x01		/* Pin 2 */
#define GC_PSX_POWER	0xf8		/* Pins 5-9 */
#define GC_PSX_SELECT	0x02		/* Pin 3 */

#define GC_PSX_ID(x)	((x) >> 4)	/* High nibble is device type */
#define GC_PSX_LEN(x)	(((x) & 0xf) << 1)	/* Low nibble is length in bytes/2 */

static int gc_psx_delay = GC_PSX_DELAY;
module_param_named(psx_delay, gc_psx_delay, uint, 0);
MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");

__obsolete_setup("gc_psx_delay=");

static short gc_psx_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y };
static short gc_psx_btn[] = { BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
				BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR };
static short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };

/*
 * gc_psx_command() writes 8bit command and reads 8bit data from
 * the psx pad.
 */

static void gc_psx_command(struct gc *gc, int b, unsigned char data[5])
{
	int i, j, cmd, read;
	for (i = 0; i < 5; i++)
		data[i] = 0;

	for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
		cmd = (b & 1) ? GC_PSX_COMMAND : 0;
		parport_write_data(gc->pd->port, cmd | GC_PSX_POWER);
		udelay(gc_psx_delay);
		read = parport_read_status(gc->pd->port) ^ 0x80;
		for (j = 0; j < 5; j++)
			data[j] |= (read & gc_status_bit[j] & (gc->pads[GC_PSX] | gc->pads[GC_DDR])) ? (1 << i) : 0;
		parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
		udelay(gc_psx_delay);
	}
}

/*
 * gc_psx_read_packet() reads a whole psx packet and returns
 * device identifier code.
 */

static void gc_psx_read_packet(struct gc *gc, unsigned char data[5][GC_PSX_BYTES], unsigned char id[5])
{
	int i, j, max_len = 0;
	unsigned long flags;
	unsigned char data2[5];

	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);	/* Select pad */
	udelay(gc_psx_delay);
	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);			/* Deselect, begin command */
	udelay(gc_psx_delay);

	local_irq_save(flags);

	gc_psx_command(gc, 0x01, data2);						/* Access pad */
	gc_psx_command(gc, 0x42, id);							/* Get device ids */
	gc_psx_command(gc, 0, data2);							/* Dump status */

	for (i =0; i < 5; i++)								/* Find the longest pad */
		if((gc_status_bit[i] & (gc->pads[GC_PSX] | gc->pads[GC_DDR]))
			&& (GC_PSX_LEN(id[i]) > max_len)
			&& (GC_PSX_LEN(id[i]) <= GC_PSX_BYTES))
			max_len = GC_PSX_LEN(id[i]);

	for (i = 0; i < max_len; i++) {						/* Read in all the data */
		gc_psx_command(gc, 0, data2);
		for (j = 0; j < 5; j++)
			data[j][i] = data2[j];
	}

	local_irq_restore(flags);

	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);

	for(i = 0; i < 5; i++)								/* Set id's to the real value */
		id[i] = GC_PSX_ID(id[i]);
}

/*
 * gc_timer() reads and analyzes console pads data.
 */

#define GC_MAX_LENGTH GC_N64_LENGTH

static void gc_timer(unsigned long private)
{
	struct gc *gc = (void *) private;
	struct input_dev *dev = gc->dev;
	unsigned char data[GC_MAX_LENGTH];
	unsigned char data_psx[5][GC_PSX_BYTES];
	int i, j, s;

/*
 * N64 pads - must be read first, any read confuses them for 200 us
 */

	if (gc->pads[GC_N64]) {

		gc_n64_read_packet(gc, data);

		for (i = 0; i < 5; i++) {

			s = gc_status_bit[i];

			if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {

				signed char axes[2];
				axes[0] = axes[1] = 0;

				for (j = 0; j < 8; j++) {
					if (data[23 - j] & s) axes[0] |= 1 << j;
					if (data[31 - j] & s) axes[1] |= 1 << j;
				}

				input_report_abs(dev + i, ABS_X,  axes[0]);
				input_report_abs(dev + i, ABS_Y, -axes[1]);

				input_report_abs(dev + i, ABS_HAT0X, !(s & data[6]) - !(s & data[7]));
				input_report_abs(dev + i, ABS_HAT0Y, !(s & data[4]) - !(s & data[5]));

				for (j = 0; j < 10; j++)
					input_report_key(dev + i, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);

				input_sync(dev + i);
			}
		}
	}

/*
 * NES and SNES pads
 */

	if (gc->pads[GC_NES] || gc->pads[GC_SNES]) {

		gc_nes_read_packet(gc, gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH, data);

		for (i = 0; i < 5; i++) {

			s = gc_status_bit[i];

			if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
				input_report_abs(dev + i, ABS_X, !(s & data[6]) - !(s & data[7]));
				input_report_abs(dev + i, ABS_Y, !(s & data[4]) - !(s & data[5]));
			}

			if (s & gc->pads[GC_NES])
				for (j = 0; j < 4; j++)
					input_report_key(dev + i, gc_snes_btn[j], s & data[gc_nes_bytes[j]]);

			if (s & gc->pads[GC_SNES])
				for (j = 0; j < 8; j++)
					input_report_key(dev + i, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);

			input_sync(dev + i);
		}
	}

/*
 * Multi and Multi2 joysticks
 */

	if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2]) {

		gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);

		for (i = 0; i < 5; i++) {

			s = gc_status_bit[i];

			if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
				input_report_abs(dev + i, ABS_X,  !(s & data[2]) - !(s & data[3]));
				input_report_abs(dev + i, ABS_Y,  !(s & data[0]) - !(s & data[1]));
				input_report_key(dev + i, BTN_TRIGGER, s & data[4]);
			}

			if (s & gc->pads[GC_MULTI2])
				input_report_key(dev + i, BTN_THUMB, s & data[5]);

			input_sync(dev + i);
		}
	}

/*
 * PSX controllers
 */

	if (gc->pads[GC_PSX] || gc->pads[GC_DDR]) {

		gc_psx_read_packet(gc, data_psx, data);

		for (i = 0; i < 5; i++) {
			switch (data[i]) {

				case GC_PSX_RUMBLE:

					input_report_key(dev + i, BTN_THUMBL, ~data_psx[i][0] & 0x04);
					input_report_key(dev + i, BTN_THUMBR, ~data_psx[i][0] & 0x02);

				case GC_PSX_NEGCON:
				case GC_PSX_ANALOG:

					if(gc->pads[GC_DDR] & gc_status_bit[i]) {
						for(j = 0; j < 4; j++)
							input_report_key(dev + i, gc_psx_ddr_btn[j], ~data_psx[i][0] & (0x10 << j));
					} else {
						for (j = 0; j < 4; j++)
							input_report_abs(dev + i, gc_psx_abs[j+2], data_psx[i][j + 2]);

						input_report_abs(dev + i, ABS_X, 128 + !(data_psx[i][0] & 0x20) * 127 - !(data_psx[i][0] & 0x80) * 128);
						input_report_abs(dev + i, ABS_Y, 128 + !(data_psx[i][0] & 0x40) * 127 - !(data_psx[i][0] & 0x10) * 128);
					}

					for (j = 0; j < 8; j++)
						input_report_key(dev + i, gc_psx_btn[j], ~data_psx[i][1] & (1 << j));

					input_report_key(dev + i, BTN_START,  ~data_psx[i][0] & 0x08);
					input_report_key(dev + i, BTN_SELECT, ~data_psx[i][0] & 0x01);

					input_sync(dev + i);

					break;

				case GC_PSX_NORMAL:
					if(gc->pads[GC_DDR] & gc_status_bit[i]) {
						for(j = 0; j < 4; j++)
							input_report_key(dev + i, gc_psx_ddr_btn[j], ~data_psx[i][0] & (0x10 << j));
					} else {
						input_report_abs(dev + i, ABS_X, 128 + !(data_psx[i][0] & 0x20) * 127 - !(data_psx[i][0] & 0x80) * 128);
						input_report_abs(dev + i, ABS_Y, 128 + !(data_psx[i][0] & 0x40) * 127 - !(data_psx[i][0] & 0x10) * 128);

						/* for some reason if the extra axes are left unset they drift */
						/* for (j = 0; j < 4; j++)
							input_report_abs(dev + i, gc_psx_abs[j+2], 128);
						 * This needs to be debugged properly,
						 * maybe fuzz processing needs to be done in input_sync()
						 *				 --vojtech
						 */
					}

					for (j = 0; j < 8; j++)
						input_report_key(dev + i, gc_psx_btn[j], ~data_psx[i][1] & (1 << j));

					input_report_key(dev + i, BTN_START,  ~data_psx[i][0] & 0x08);
					input_report_key(dev + i, BTN_SELECT, ~data_psx[i][0] & 0x01);

					input_sync(dev + i);

					break;

				case 0: /* not a pad, ignore */
					break;
			}
		}
	}

	mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
}

static int gc_open(struct input_dev *dev)
{
	struct gc *gc = dev->private;
	if (!gc->used++) {
		parport_claim(gc->pd);
		parport_write_control(gc->pd->port, 0x04);
		mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
	}
	return 0;
}

static void gc_close(struct input_dev *dev)
{
	struct gc *gc = dev->private;
	if (!--gc->used) {
		del_timer(&gc->timer);
		parport_write_control(gc->pd->port, 0x00);
		parport_release(gc->pd);
	}
}

static struct gc __init *gc_probe(int *config, int nargs)
{
	struct gc *gc;
	struct parport *pp;
	int i, j;

	if (config[0] < 0)
		return NULL;

	if (nargs < 2) {
		printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
		return NULL;
	}

	pp = parport_find_number(config[0]);

	if (!pp) {
		printk(KERN_ERR "gamecon.c: no such parport\n");
		return NULL;
	}

	if (!(gc = kmalloc(sizeof(struct gc), GFP_KERNEL))) {
		parport_put_port(pp);
		return NULL;
	}
	memset(gc, 0, sizeof(struct gc));

	gc->pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);

	parport_put_port(pp);

	if (!gc->pd) {
		printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
		kfree(gc);
		return NULL;
	}

	parport_claim(gc->pd);

	init_timer(&gc->timer);
	gc->timer.data = (long) gc;
	gc->timer.function = gc_timer;

	for (i = 0; i < nargs - 1; i++) {

		if (!config[i + 1])
			continue;

		if (config[i + 1] < 1 || config[i + 1] > GC_MAX) {
			printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", config[i + 1]);
			continue;
		}

                gc->dev[i].private = gc;
                gc->dev[i].open = gc_open;
                gc->dev[i].close = gc_close;

                gc->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);

		for (j = 0; j < 2; j++) {
			set_bit(ABS_X + j, gc->dev[i].absbit);
			gc->dev[i].absmin[ABS_X + j] = -1;
			gc->dev[i].absmax[ABS_X + j] =  1;
		}

		gc->pads[0] |= gc_status_bit[i];
		gc->pads[config[i + 1]] |= gc_status_bit[i];

		switch(config[i + 1]) {

			case GC_N64:
				for (j = 0; j < 10; j++)
					set_bit(gc_n64_btn[j], gc->dev[i].keybit);

				for (j = 0; j < 2; j++) {
					set_bit(ABS_X + j, gc->dev[i].absbit);
					gc->dev[i].absmin[ABS_X + j] = -127;
					gc->dev[i].absmax[ABS_X + j] =  126;
					gc->dev[i].absflat[ABS_X + j] = 2;
					set_bit(ABS_HAT0X + j, gc->dev[i].absbit);
					gc->dev[i].absmin[ABS_HAT0X + j] = -1;
					gc->dev[i].absmax[ABS_HAT0X + j] =  1;
				}

				break;

			case GC_SNES:
				for (j = 4; j < 8; j++)
					set_bit(gc_snes_btn[j], gc->dev[i].keybit);
			case GC_NES:
				for (j = 0; j < 4; j++)
					set_bit(gc_snes_btn[j], gc->dev[i].keybit);
				break;

			case GC_MULTI2:
				set_bit(BTN_THUMB, gc->dev[i].keybit);
			case GC_MULTI:
				set_bit(BTN_TRIGGER, gc->dev[i].keybit);
				break;

			case GC_PSX:
			case GC_DDR:
				if(config[i + 1] == GC_DDR) {
					for (j = 0; j < 4; j++)
						set_bit(gc_psx_ddr_btn[j], gc->dev[i].keybit);
				} else {
					for (j = 0; j < 6; j++) {
						set_bit(gc_psx_abs[j], gc->dev[i].absbit);
						gc->dev[i].absmin[gc_psx_abs[j]] = 4;
						gc->dev[i].absmax[gc_psx_abs[j]] = 252;
						gc->dev[i].absflat[gc_psx_abs[j]] = 2;
					}
				}

				for (j = 0; j < 12; j++)
					set_bit(gc_psx_btn[j], gc->dev[i].keybit);

				break;
		}

		sprintf(gc->phys[i], "%s/input%d", gc->pd->port->name, i);

                gc->dev[i].name = gc_names[config[i + 1]];
		gc->dev[i].phys = gc->phys[i];
                gc->dev[i].id.bustype = BUS_PARPORT;
                gc->dev[i].id.vendor = 0x0001;
                gc->dev[i].id.product = config[i + 1];
                gc->dev[i].id.version = 0x0100;
	}

	parport_release(gc->pd);

	if (!gc->pads[0]) {
		parport_unregister_device(gc->pd);
		kfree(gc);
		return NULL;
	}

	for (i = 0; i < 5; i++)
		if (gc->pads[0] & gc_status_bit[i]) {
			input_register_device(gc->dev + i);
			printk(KERN_INFO "input: %s on %s\n", gc->dev[i].name, gc->pd->port->name);
		}

	return gc;
}

static int __init gc_init(void)
{
	gc_base[0] = gc_probe(gc, gc_nargs);
	gc_base[1] = gc_probe(gc_2, gc_nargs_2);
	gc_base[2] = gc_probe(gc_3, gc_nargs_3);

	if (gc_base[0] || gc_base[1] || gc_base[2])
		return 0;

	return -ENODEV;
}

static void __exit gc_exit(void)
{
	int i, j;

	for (i = 0; i < 3; i++)
		if (gc_base[i]) {
			for (j = 0; j < 5; j++)
				if (gc_base[i]->pads[0] & gc_status_bit[j])
					input_unregister_device(gc_base[i]->dev + j);
			parport_unregister_device(gc_base[i]->pd);
		}
}

module_init(gc_init);
module_exit(gc_exit);