summaryrefslogtreecommitdiffstats
path: root/drivers/input/joystick/db9.c
blob: 960e501c60c8627315721118439a1b878a0694ab (plain)
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
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
/*
 * $Id: db9.c,v 1.13 2002/04/07 20:13:37 vojtech Exp $
 *
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 *
 *  Based on the work of:
 *	Andree Borrmann		Mats Sjövall
 */

/*
 * Atari, Amstrad, Commodore, Amiga, Sega, etc. joystick driver for Linux
 */

/*
 * 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/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/parport.h>
#include <linux/input.h>
#include <linux/mutex.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Atari, Amstrad, Commodore, Amiga, Sega, etc. joystick driver");
MODULE_LICENSE("GPL");

struct db9_config {
	int args[2];
	unsigned int nargs;
};

#define DB9_MAX_PORTS		3
static struct db9_config db9_cfg[DB9_MAX_PORTS] __initdata;

module_param_array_named(dev, db9_cfg[0].args, int, &db9_cfg[0].nargs, 0);
MODULE_PARM_DESC(dev, "Describes first attached device (<parport#>,<type>)");
module_param_array_named(dev2, db9_cfg[1].args, int, &db9_cfg[1].nargs, 0);
MODULE_PARM_DESC(dev2, "Describes second attached device (<parport#>,<type>)");
module_param_array_named(dev3, db9_cfg[2].args, int, &db9_cfg[2].nargs, 0);
MODULE_PARM_DESC(dev3, "Describes third attached device (<parport#>,<type>)");

#define DB9_ARG_PARPORT		0
#define DB9_ARG_MODE		1

#define DB9_MULTI_STICK		0x01
#define DB9_MULTI2_STICK	0x02
#define DB9_GENESIS_PAD		0x03
#define DB9_GENESIS5_PAD	0x05
#define DB9_GENESIS6_PAD	0x06
#define DB9_SATURN_PAD		0x07
#define DB9_MULTI_0802		0x08
#define DB9_MULTI_0802_2	0x09
#define DB9_CD32_PAD		0x0A
#define DB9_SATURN_DPP		0x0B
#define DB9_SATURN_DPP_2	0x0C
#define DB9_MAX_PAD		0x0D

#define DB9_UP			0x01
#define DB9_DOWN		0x02
#define DB9_LEFT		0x04
#define DB9_RIGHT		0x08
#define DB9_FIRE1		0x10
#define DB9_FIRE2		0x20
#define DB9_FIRE3		0x40
#define DB9_FIRE4		0x80

#define DB9_NORMAL		0x0a
#define DB9_NOSELECT		0x08

#define DB9_GENESIS6_DELAY	14
#define DB9_REFRESH_TIME	HZ/100

#define DB9_MAX_DEVICES		2

struct db9_mode_data {
	const char *name;
	const short *buttons;
	int n_buttons;
	int n_pads;
	int n_axis;
	int bidirectional;
	int reverse;
};

struct db9 {
	struct input_dev *dev[DB9_MAX_DEVICES];
	struct timer_list timer;
	struct pardevice *pd;
	int mode;
	int used;
	struct mutex mutex;
	char phys[DB9_MAX_DEVICES][32];
};

static struct db9 *db9_base[3];

static const short db9_multi_btn[] = { BTN_TRIGGER, BTN_THUMB };
static const short db9_genesis_btn[] = { BTN_START, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_MODE };
static const short db9_cd32_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START };
static const short db9_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_RZ, ABS_Z, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y };

static const struct db9_mode_data db9_modes[] = {
	{ NULL,					 NULL,		  0,  0,  0,  0,  0 },
	{ "Multisystem joystick",		 db9_multi_btn,	  1,  1,  2,  1,  1 },
	{ "Multisystem joystick (2 fire)",	 db9_multi_btn,	  2,  1,  2,  1,  1 },
	{ "Genesis pad",			 db9_genesis_btn, 4,  1,  2,  1,  1 },
	{ NULL,					 NULL,		  0,  0,  0,  0,  0 },
	{ "Genesis 5 pad",			 db9_genesis_btn, 6,  1,  2,  1,  1 },
	{ "Genesis 6 pad",			 db9_genesis_btn, 8,  1,  2,  1,  1 },
	{ "Saturn pad",				 db9_cd32_btn,	  9,  6,  7,  0,  1 },
	{ "Multisystem (0.8.0.2) joystick",	 db9_multi_btn,	  1,  1,  2,  1,  1 },
	{ "Multisystem (0.8.0.2-dual) joystick", db9_multi_btn,	  1,  2,  2,  1,  1 },
	{ "Amiga CD-32 pad",			 db9_cd32_btn,	  7,  1,  2,  1,  1 },
	{ "Saturn dpp",				 db9_cd32_btn,	  9,  6,  7,  0,  0 },
	{ "Saturn dpp dual",			 db9_cd32_btn,	  9,  12, 7,  0,  0 },
};

/*
 * Saturn controllers
 */
#define DB9_SATURN_DELAY 300
static const int db9_saturn_byte[] = { 1, 1, 1, 2, 2, 2, 2, 2, 1 };
static const unsigned char db9_saturn_mask[] = { 0x04, 0x01, 0x02, 0x40, 0x20, 0x10, 0x08, 0x80, 0x08 };

/*
 * db9_saturn_write_sub() writes 2 bit data.
 */
static void db9_saturn_write_sub(struct parport *port, int type, unsigned char data, int powered, int pwr_sub)
{
	unsigned char c;

	switch (type) {
	case 1: /* DPP1 */
		c = 0x80 | 0x30 | (powered ? 0x08 : 0) | (pwr_sub ? 0x04 : 0) | data;
		parport_write_data(port, c);
		break;
	case 2: /* DPP2 */
		c = 0x40 | data << 4 | (powered ? 0x08 : 0) | (pwr_sub ? 0x04 : 0) | 0x03;
		parport_write_data(port, c);
		break;
	case 0:	/* DB9 */
		c = ((((data & 2) ? 2 : 0) | ((data & 1) ? 4 : 0)) ^ 0x02) | !powered;
		parport_write_control(port, c);
		break;
	}
}

/*
 * gc_saturn_read_sub() reads 4 bit data.
 */
static unsigned char db9_saturn_read_sub(struct parport *port, int type)
{
	unsigned char data;

	if (type) {
		/* DPP */
		data = parport_read_status(port) ^ 0x80;
		return (data & 0x80 ? 1 : 0) | (data & 0x40 ? 2 : 0)
		     | (data & 0x20 ? 4 : 0) | (data & 0x10 ? 8 : 0);
	} else {
		/* DB9 */
		data = parport_read_data(port) & 0x0f;
		return (data & 0x8 ? 1 : 0) | (data & 0x4 ? 2 : 0)
		     | (data & 0x2 ? 4 : 0) | (data & 0x1 ? 8 : 0);
	}
}

/*
 * db9_saturn_read_analog() sends clock and reads 8 bit data.
 */
static unsigned char db9_saturn_read_analog(struct parport *port, int type, int powered)
{
	unsigned char data;

	db9_saturn_write_sub(port, type, 0, powered, 0);
	udelay(DB9_SATURN_DELAY);
	data = db9_saturn_read_sub(port, type) << 4;
	db9_saturn_write_sub(port, type, 2, powered, 0);
	udelay(DB9_SATURN_DELAY);
	data |= db9_saturn_read_sub(port, type);
	return data;
}

/*
 * db9_saturn_read_packet() reads whole saturn packet at connector
 * and returns device identifier code.
 */
static unsigned char db9_saturn_read_packet(struct parport *port, unsigned char *data, int type, int powered)
{
	int i, j;
	unsigned char tmp;

	db9_saturn_write_sub(port, type, 3, powered, 0);
	data[0] = db9_saturn_read_sub(port, type);
	switch (data[0] & 0x0f) {
	case 0xf:
		/* 1111  no pad */
		return data[0] = 0xff;
	case 0x4: case 0x4 | 0x8:
		/* ?100 : digital controller */
		db9_saturn_write_sub(port, type, 0, powered, 1);
		data[2] = db9_saturn_read_sub(port, type) << 4;
		db9_saturn_write_sub(port, type, 2, powered, 1);
		data[1] = db9_saturn_read_sub(port, type) << 4;
		db9_saturn_write_sub(port, type, 1, powered, 1);
		data[1] |= db9_saturn_read_sub(port, type);
		db9_saturn_write_sub(port, type, 3, powered, 1);
		/* data[2] |= db9_saturn_read_sub(port, type); */
		data[2] |= data[0];
		return data[0] = 0x02;
	case 0x1:
		/* 0001 : analog controller or multitap */
		db9_saturn_write_sub(port, type, 2, powered, 0);
		udelay(DB9_SATURN_DELAY);
		data[0] = db9_saturn_read_analog(port, type, powered);
		if (data[0] != 0x41) {
			/* read analog controller */
			for (i = 0; i < (data[0] & 0x0f); i++)
				data[i + 1] = db9_saturn_read_analog(port, type, powered);
			db9_saturn_write_sub(port, type, 3, powered, 0);
			return data[0];
		} else {
			/* read multitap */
			if (db9_saturn_read_analog(port, type, powered) != 0x60)
				return data[0] = 0xff;
			for (i = 0; i < 60; i += 10) {
				data[i] = db9_saturn_read_analog(port, type, powered);
				if (data[i] != 0xff)
					/* read each pad */
					for (j = 0; j < (data[i] & 0x0f); j++)
						data[i + j + 1] = db9_saturn_read_analog(port, type, powered);
			}
			db9_saturn_write_sub(port, type, 3, powered, 0);
			return 0x41;
		}
	case 0x0:
		/* 0000 : mouse */
		db9_saturn_write_sub(port, type, 2, powered, 0);
		udelay(DB9_SATURN_DELAY);
		tmp = db9_saturn_read_analog(port, type, powered);
		if (tmp == 0xff) {
			for (i = 0; i < 3; i++)
				data[i + 1] = db9_saturn_read_analog(port, type, powered);
			db9_saturn_write_sub(port, type, 3, powered, 0);
			return data[0] = 0xe3;
		}
	default:
		return data[0];
	}
}

/*
 * db9_saturn_report() analyzes packet and reports.
 */
static int db9_saturn_report(unsigned char id, unsigned char data[60], struct input_dev *devs[], int n, int max_pads)
{
	struct input_dev *dev;
	int tmp, i, j;

	tmp = (id == 0x41) ? 60 : 10;
	for (j = 0; j < tmp && n < max_pads; j += 10, n++) {
		dev = devs[n];
		switch (data[j]) {
		case 0x16: /* multi controller (analog 4 axis) */
			input_report_abs(dev, db9_abs[5], data[j + 6]);
		case 0x15: /* mission stick (analog 3 axis) */
			input_report_abs(dev, db9_abs[3], data[j + 4]);
			input_report_abs(dev, db9_abs[4], data[j + 5]);
		case 0x13: /* racing controller (analog 1 axis) */
			input_report_abs(dev, db9_abs[2], data[j + 3]);
		case 0x34: /* saturn keyboard (udlr ZXC ASD QE Esc) */
		case 0x02: /* digital pad (digital 2 axis + buttons) */
			input_report_abs(dev, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
			input_report_abs(dev, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
			for (i = 0; i < 9; i++)
				input_report_key(dev, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
			break;
		case 0x19: /* mission stick x2 (analog 6 axis + buttons) */
			input_report_abs(dev, db9_abs[0], !(data[j + 1] & 128) - !(data[j + 1] & 64));
			input_report_abs(dev, db9_abs[1], !(data[j + 1] & 32) - !(data[j + 1] & 16));
			for (i = 0; i < 9; i++)
				input_report_key(dev, db9_cd32_btn[i], ~data[j + db9_saturn_byte[i]] & db9_saturn_mask[i]);
			input_report_abs(dev, db9_abs[2], data[j + 3]);
			input_report_abs(dev, db9_abs[3], data[j + 4]);
			input_report_abs(dev, db9_abs[4], data[j + 5]);
			/*
			input_report_abs(dev, db9_abs[8], (data[j + 6] & 128 ? 0 : 1) - (data[j + 6] & 64 ? 0 : 1));
			input_report_abs(dev, db9_abs[9], (data[j + 6] & 32 ? 0 : 1) - (data[j + 6] & 16 ? 0 : 1));
			*/
			input_report_abs(dev, db9_abs[6], data[j + 7]);
			input_report_abs(dev, db9_abs[7], data[j + 8]);
			input_report_abs(dev, db9_abs[5], data[j + 9]);
			break;
		case 0xd3: /* sankyo ff (analog 1 axis + stop btn) */
			input_report_key(dev, BTN_A, data[j + 3] & 0x80);
			input_report_abs(dev, db9_abs[2], data[j + 3] & 0x7f);
			break;
		case 0xe3: /* shuttle mouse (analog 2 axis + buttons. signed value) */
			input_report_key(dev, BTN_START, data[j + 1] & 0x08);
			input_report_key(dev, BTN_A, data[j + 1] & 0x04);
			input_report_key(dev, BTN_C, data[j + 1] & 0x02);
			input_report_key(dev, BTN_B, data[j + 1] & 0x01);
			input_report_abs(dev, db9_abs[2], data[j + 2] ^ 0x80);
			input_report_abs(dev, db9_abs[3], (0xff-(data[j + 3] ^ 0x80))+1); /* */
			break;
		case 0xff:
		default: /* no pad */
			input_report_abs(dev, db9_abs[0], 0);
			input_report_abs(dev, db9_abs[1], 0);
			for (i = 0; i < 9; i++)
				input_report_key(dev, db9_cd32_btn[i], 0);
			break;
		}
	}
	return n;
}

static int db9_saturn(int mode, struct parport *port, struct input_dev *devs[])
{
	unsigned char id, data[60];
	int type, n, max_pads;
	int tmp, i;

	switch (mode) {
	case DB9_SATURN_PAD:
		type = 0;
		n = 1;
		break;
	case DB9_SATURN_DPP:
		type = 1;
		n = 1;
		break;
	case DB9_SATURN_DPP_2:
		type = 1;
		n = 2;
		break;
	default:
		return -1;
	}
	max_pads = min(db9_modes[mode].n_pads, DB9_MAX_DEVICES);
	for (tmp = 0, i = 0; i < n; i++) {
		id = db9_saturn_read_packet(port, data, type + i, 1);
		tmp = db9_saturn_report(id, data, devs, tmp, max_pads);
	}
	return 0;
}

static void db9_timer(unsigned long private)
{
	struct db9 *db9 = (void *) private;
	struct parport *port = db9->pd->port;
	struct input_dev *dev = db9->dev[0];
	struct input_dev *dev2 = db9->dev[1];
	int data, i;

	switch (db9->mode) {
		case DB9_MULTI_0802_2:

			data = parport_read_data(port) >> 3;

			input_report_abs(dev2, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
			input_report_abs(dev2, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
			input_report_key(dev2, BTN_TRIGGER, ~data & DB9_FIRE1);

		case DB9_MULTI_0802:

			data = parport_read_status(port) >> 3;

			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
			input_report_key(dev, BTN_TRIGGER, data & DB9_FIRE1);
			break;

		case DB9_MULTI_STICK:

			data = parport_read_data(port);

			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
			input_report_key(dev, BTN_TRIGGER, ~data & DB9_FIRE1);
			break;

		case DB9_MULTI2_STICK:

			data = parport_read_data(port);

			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
			input_report_key(dev, BTN_TRIGGER, ~data & DB9_FIRE1);
			input_report_key(dev, BTN_THUMB,   ~data & DB9_FIRE2);
			break;

		case DB9_GENESIS_PAD:

			parport_write_control(port, DB9_NOSELECT);
			data = parport_read_data(port);

			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
			input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
			input_report_key(dev, BTN_C, ~data & DB9_FIRE2);

			parport_write_control(port, DB9_NORMAL);
			data = parport_read_data(port);

			input_report_key(dev, BTN_A,     ~data & DB9_FIRE1);
			input_report_key(dev, BTN_START, ~data & DB9_FIRE2);
			break;

		case DB9_GENESIS5_PAD:

			parport_write_control(port, DB9_NOSELECT);
			data = parport_read_data(port);

			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
			input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
			input_report_key(dev, BTN_C, ~data & DB9_FIRE2);

			parport_write_control(port, DB9_NORMAL);
			data = parport_read_data(port);

			input_report_key(dev, BTN_A,     ~data & DB9_FIRE1);
			input_report_key(dev, BTN_X,     ~data & DB9_FIRE2);
			input_report_key(dev, BTN_Y,     ~data & DB9_LEFT);
			input_report_key(dev, BTN_START, ~data & DB9_RIGHT);
			break;

		case DB9_GENESIS6_PAD:

			parport_write_control(port, DB9_NOSELECT); /* 1 */
			udelay(DB9_GENESIS6_DELAY);
			data = parport_read_data(port);

			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));
			input_report_key(dev, BTN_B, ~data & DB9_FIRE1);
			input_report_key(dev, BTN_C, ~data & DB9_FIRE2);

			parport_write_control(port, DB9_NORMAL);
			udelay(DB9_GENESIS6_DELAY);
			data = parport_read_data(port);

			input_report_key(dev, BTN_A, ~data & DB9_FIRE1);
			input_report_key(dev, BTN_START, ~data & DB9_FIRE2);

			parport_write_control(port, DB9_NOSELECT); /* 2 */
			udelay(DB9_GENESIS6_DELAY);
			parport_write_control(port, DB9_NORMAL);
			udelay(DB9_GENESIS6_DELAY);
			parport_write_control(port, DB9_NOSELECT); /* 3 */
			udelay(DB9_GENESIS6_DELAY);
			data=parport_read_data(port);

			input_report_key(dev, BTN_X,    ~data & DB9_LEFT);
			input_report_key(dev, BTN_Y,    ~data & DB9_DOWN);
			input_report_key(dev, BTN_Z,    ~data & DB9_UP);
			input_report_key(dev, BTN_MODE, ~data & DB9_RIGHT);

			parport_write_control(port, DB9_NORMAL);
			udelay(DB9_GENESIS6_DELAY);
			parport_write_control(port, DB9_NOSELECT); /* 4 */
			udelay(DB9_GENESIS6_DELAY);
			parport_write_control(port, DB9_NORMAL);
			break;

		case DB9_SATURN_PAD:
		case DB9_SATURN_DPP:
		case DB9_SATURN_DPP_2:

			db9_saturn(db9->mode, port, db9->dev);
			break;

		case DB9_CD32_PAD:

			data = parport_read_data(port);

			input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
			input_report_abs(dev, ABS_Y, (data & DB9_DOWN  ? 0 : 1) - (data & DB9_UP   ? 0 : 1));

			parport_write_control(port, 0x0a);

			for (i = 0; i < 7; i++) {
				data = parport_read_data(port);
				parport_write_control(port, 0x02);
				parport_write_control(port, 0x0a);
				input_report_key(dev, db9_cd32_btn[i], ~data & DB9_FIRE2);
			}

			parport_write_control(port, 0x00);
			break;
		}

	input_sync(dev);

	mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
}

static int db9_open(struct input_dev *dev)
{
	struct db9 *db9 = input_get_drvdata(dev);
	struct parport *port = db9->pd->port;
	int err;

	err = mutex_lock_interruptible(&db9->mutex);
	if (err)
		return err;

	if (!db9->used++) {
		parport_claim(db9->pd);
		parport_write_data(port, 0xff);
		if (db9_modes[db9->mode].reverse) {
			parport_data_reverse(port);
			parport_write_control(port, DB9_NORMAL);
		}
		mod_timer(&db9->timer, jiffies + DB9_REFRESH_TIME);
	}

	mutex_unlock(&db9->mutex);
	return 0;
}

static void db9_close(struct input_dev *dev)
{
	struct db9 *db9 = input_get_drvdata(dev);
	struct parport *port = db9->pd->port;

	mutex_lock(&db9->mutex);
	if (!--db9->used) {
		del_timer_sync(&db9->timer);
		parport_write_control(port, 0x00);
		parport_data_forward(port);
		parport_release(db9->pd);
	}
	mutex_unlock(&db9->mutex);
}

static struct db9 __init *db9_probe(int parport, int mode)
{
	struct db9 *db9;
	const struct db9_mode_data *db9_mode;
	struct parport *pp;
	struct pardevice *pd;
	struct input_dev *input_dev;
	int i, j;
	int err;

	if (mode < 1 || mode >= DB9_MAX_PAD || !db9_modes[mode].n_buttons) {
		printk(KERN_ERR "db9.c: Bad device type %d\n", mode);
		err = -EINVAL;
		goto err_out;
	}

	db9_mode = &db9_modes[mode];

	pp = parport_find_number(parport);
	if (!pp) {
		printk(KERN_ERR "db9.c: no such parport\n");
		err = -ENODEV;
		goto err_out;
	}

	if (db9_mode->bidirectional && !(pp->modes & PARPORT_MODE_TRISTATE)) {
		printk(KERN_ERR "db9.c: specified parport is not bidirectional\n");
		err = -EINVAL;
		goto err_put_pp;
	}

	pd = parport_register_device(pp, "db9", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
	if (!pd) {
		printk(KERN_ERR "db9.c: parport busy already - lp.o loaded?\n");
		err = -EBUSY;
		goto err_put_pp;
	}

	db9 = kzalloc(sizeof(struct db9), GFP_KERNEL);
	if (!db9) {
		printk(KERN_ERR "db9.c: Not enough memory\n");
		err = -ENOMEM;
		goto err_unreg_pardev;
	}

	mutex_init(&db9->mutex);
	db9->pd = pd;
	db9->mode = mode;
	init_timer(&db9->timer);
	db9->timer.data = (long) db9;
	db9->timer.function = db9_timer;

	for (i = 0; i < (min(db9_mode->n_pads, DB9_MAX_DEVICES)); i++) {

		db9->dev[i] = input_dev = input_allocate_device();
		if (!input_dev) {
			printk(KERN_ERR "db9.c: Not enough memory for input device\n");
			err = -ENOMEM;
			goto err_unreg_devs;
		}

		snprintf(db9->phys[i], sizeof(db9->phys[i]),
			 "%s/input%d", db9->pd->port->name, i);

		input_dev->name = db9_mode->name;
		input_dev->phys = db9->phys[i];
		input_dev->id.bustype = BUS_PARPORT;
		input_dev->id.vendor = 0x0002;
		input_dev->id.product = mode;
		input_dev->id.version = 0x0100;

		input_set_drvdata(input_dev, db9);

		input_dev->open = db9_open;
		input_dev->close = db9_close;

		input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
		for (j = 0; j < db9_mode->n_buttons; j++)
			set_bit(db9_mode->buttons[j], input_dev->keybit);
		for (j = 0; j < db9_mode->n_axis; j++) {
			if (j < 2)
				input_set_abs_params(input_dev, db9_abs[j], -1, 1, 0, 0);
			else
				input_set_abs_params(input_dev, db9_abs[j], 1, 255, 0, 0);
		}

		err = input_register_device(input_dev);
		if (err)
			goto err_free_dev;
	}

	parport_put_port(pp);
	return db9;

 err_free_dev:
	input_free_device(db9->dev[i]);
 err_unreg_devs:
	while (--i >= 0)
		input_unregister_device(db9->dev[i]);
	kfree(db9);
 err_unreg_pardev:
	parport_unregister_device(pd);
 err_put_pp:
	parport_put_port(pp);
 err_out:
	return ERR_PTR(err);
}

static void db9_remove(struct db9 *db9)
{
	int i;

	for (i = 0; i < min(db9_modes[db9->mode].n_pads, DB9_MAX_DEVICES); i++)
		input_unregister_device(db9->dev[i]);
	parport_unregister_device(db9->pd);
	kfree(db9);
}

static int __init db9_init(void)
{
	int i;
	int have_dev = 0;
	int err = 0;

	for (i = 0; i < DB9_MAX_PORTS; i++) {
		if (db9_cfg[i].nargs == 0 || db9_cfg[i].args[DB9_ARG_PARPORT] < 0)
			continue;

		if (db9_cfg[i].nargs < 2) {
			printk(KERN_ERR "db9.c: Device type must be specified.\n");
			err = -EINVAL;
			break;
		}

		db9_base[i] = db9_probe(db9_cfg[i].args[DB9_ARG_PARPORT],
					db9_cfg[i].args[DB9_ARG_MODE]);
		if (IS_ERR(db9_base[i])) {
			err = PTR_ERR(db9_base[i]);
			break;
		}

		have_dev = 1;
	}

	if (err) {
		while (--i >= 0)
			if (db9_base[i])
				db9_remove(db9_base[i]);
		return err;
	}

	return have_dev ? 0 : -ENODEV;
}

static void __exit db9_exit(void)
{
	int i;

	for (i = 0; i < DB9_MAX_PORTS; i++)
		if (db9_base[i])
			db9_remove(db9_base[i]);
}

module_init(db9_init);
module_exit(db9_exit);
OpenPOWER on IntegriCloud