Bootlin logo

Elixir Cross Referencer

  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
/*
 *  Copyright (c) 1998-2005 Vojtech Pavlik
 */

/*
 * Logitech ADI joystick family 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/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/gameport.h>
#include <linux/init.h>
#include <linux/jiffies.h>

#define DRIVER_DESC	"Logitech ADI joystick family driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/*
 * Times, array sizes, flags, ids.
 */

#define ADI_MAX_START		200	/* Trigger to packet timeout [200us] */
#define ADI_MAX_STROBE		40	/* Single bit timeout [40us] */
#define ADI_INIT_DELAY		10	/* Delay after init packet [10ms] */
#define ADI_DATA_DELAY		4	/* Delay after data packet [4ms] */

#define ADI_MAX_LENGTH		256
#define ADI_MIN_LENGTH		8
#define ADI_MIN_LEN_LENGTH	10
#define ADI_MIN_ID_LENGTH	66
#define ADI_MAX_NAME_LENGTH	64
#define ADI_MAX_CNAME_LENGTH	16
#define ADI_MAX_PHYS_LENGTH	64

#define ADI_FLAG_HAT		0x04
#define ADI_FLAG_10BIT		0x08

#define ADI_ID_TPD		0x01
#define ADI_ID_WGP		0x06
#define ADI_ID_WGPE		0x08
#define ADI_ID_MAX		0x0a

/*
 * Names, buttons, axes ...
 */

static char *adi_names[] = {	"WingMan Extreme Digital", "ThunderPad Digital", "SideCar", "CyberMan 2",
				"WingMan Interceptor", "WingMan Formula", "WingMan GamePad",
				"WingMan Extreme Digital 3D", "WingMan GamePad Extreme",
				"WingMan GamePad USB", "Unknown Device %#x" };

static char adi_wmgpe_abs[] =	{ ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y };
static char adi_wmi_abs[] =	{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
static char adi_wmed3d_abs[] =	{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_RZ, ABS_HAT0X, ABS_HAT0Y };
static char adi_cm2_abs[] =	{ ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
static char adi_wmf_abs[] =	{ ABS_WHEEL, ABS_GAS, ABS_BRAKE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };

static short adi_wmgpe_key[] =	{ BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,  BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT };
static short adi_wmi_key[] =	{ BTN_TRIGGER,  BTN_TOP, BTN_THUMB, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_EXTRA };
static short adi_wmed3d_key[] =	{ BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2 };
static short adi_cm2_key[] =	{ BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };

static char* adi_abs[] = { adi_wmi_abs, adi_wmgpe_abs, adi_wmf_abs, adi_cm2_abs, adi_wmi_abs, adi_wmf_abs,
			   adi_wmgpe_abs, adi_wmed3d_abs, adi_wmgpe_abs, adi_wmgpe_abs, adi_wmi_abs };

static short* adi_key[] = { adi_wmi_key, adi_wmgpe_key, adi_cm2_key, adi_cm2_key, adi_wmi_key, adi_cm2_key,
			    adi_wmgpe_key, adi_wmed3d_key, adi_wmgpe_key, adi_wmgpe_key, adi_wmi_key };

/*
 * Hat to axis conversion arrays.
 */

static struct {
	int x;
	int y;
} adi_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};

/*
 * Per-port information.
 */

struct adi {
	struct input_dev *dev;
	int length;
	int ret;
	int idx;
	unsigned char id;
	char buttons;
	char axes10;
	char axes8;
	signed char pad;
	char hats;
	char *abs;
	short *key;
	char name[ADI_MAX_NAME_LENGTH];
	char cname[ADI_MAX_CNAME_LENGTH];
	char phys[ADI_MAX_PHYS_LENGTH];
	unsigned char data[ADI_MAX_LENGTH];
};

struct adi_port {
	struct gameport *gameport;
	struct adi adi[2];
	int bad;
	int reads;
};

/*
 * adi_read_packet() reads a Logitech ADI packet.
 */

static void adi_read_packet(struct adi_port *port)
{
	struct adi *adi = port->adi;
	struct gameport *gameport = port->gameport;
	unsigned char u, v, w, x, z;
	int t[2], s[2], i;
	unsigned long flags;

	for (i = 0; i < 2; i++) {
		adi[i].ret = -1;
		t[i] = gameport_time(gameport, ADI_MAX_START);
		s[i] = 0;
	}

	local_irq_save(flags);

	gameport_trigger(gameport);
	v = z = gameport_read(gameport);

	do {
		u = v;
		w = u ^ (v = x = gameport_read(gameport));
		for (i = 0; i < 2; i++, w >>= 2, x >>= 2) {
			t[i]--;
			if ((w & 0x30) && s[i]) {
				if ((w & 0x30) < 0x30 && adi[i].ret < ADI_MAX_LENGTH && t[i] > 0) {
					adi[i].data[++adi[i].ret] = w;
					t[i] = gameport_time(gameport, ADI_MAX_STROBE);
				} else t[i] = 0;
			} else if (!(x & 0x30)) s[i] = 1;
		}
	} while (t[0] > 0 || t[1] > 0);

	local_irq_restore(flags);

	return;
}

/*
 * adi_move_bits() detects a possible 2-stream mode, and moves
 * the bits accordingly.
 */

static void adi_move_bits(struct adi_port *port, int length)
{
	int i;
	struct adi *adi = port->adi;

	adi[0].idx = adi[1].idx = 0;

	if (adi[0].ret <= 0 || adi[1].ret <= 0) return;
	if (adi[0].data[0] & 0x20 || ~adi[1].data[0] & 0x20) return;

	for (i = 1; i <= adi[1].ret; i++)
		adi[0].data[((length - 1) >> 1) + i + 1] = adi[1].data[i];

	adi[0].ret += adi[1].ret;
	adi[1].ret = -1;
}

/*
 * adi_get_bits() gathers bits from the data packet.
 */

static inline int adi_get_bits(struct adi *adi, int count)
{
	int bits = 0;
	int i;
	if ((adi->idx += count) > adi->ret) return 0;
	for (i = 0; i < count; i++)
		bits |= ((adi->data[adi->idx - i] >> 5) & 1) << i;
	return bits;
}

/*
 * adi_decode() decodes Logitech joystick data into input events.
 */

static int adi_decode(struct adi *adi)
{
	struct input_dev *dev = adi->dev;
	char *abs = adi->abs;
	short *key = adi->key;
	int i, t;

	if (adi->ret < adi->length || adi->id != (adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4)))
		return -1;

	for (i = 0; i < adi->axes10; i++)
		input_report_abs(dev, *abs++, adi_get_bits(adi, 10));

	for (i = 0; i < adi->axes8; i++)
		input_report_abs(dev, *abs++, adi_get_bits(adi, 8));

	for (i = 0; i < adi->buttons && i < 63; i++) {
		if (i == adi->pad) {
			t = adi_get_bits(adi, 4);
			input_report_abs(dev, *abs++, ((t >> 2) & 1) - ( t       & 1));
			input_report_abs(dev, *abs++, ((t >> 1) & 1) - ((t >> 3) & 1));
		}
		input_report_key(dev, *key++, adi_get_bits(adi, 1));
	}

	for (i = 0; i < adi->hats; i++) {
		if ((t = adi_get_bits(adi, 4)) > 8) t = 0;
		input_report_abs(dev, *abs++, adi_hat_to_axis[t].x);
		input_report_abs(dev, *abs++, adi_hat_to_axis[t].y);
	}

	for (i = 63; i < adi->buttons; i++)
		input_report_key(dev, *key++, adi_get_bits(adi, 1));

	input_sync(dev);

	return 0;
}

/*
 * adi_read() reads the data packet and decodes it.
 */

static int adi_read(struct adi_port *port)
{
	int i;
	int result = 0;

	adi_read_packet(port);
	adi_move_bits(port, port->adi[0].length);

	for (i = 0; i < 2; i++)
		if (port->adi[i].length)
			 result |= adi_decode(port->adi + i);

	return result;
}

/*
 * adi_poll() repeatedly polls the Logitech joysticks.
 */

static void adi_poll(struct gameport *gameport)
{
	struct adi_port *port = gameport_get_drvdata(gameport);

	port->bad -= adi_read(port);
	port->reads++;
}

/*
 * adi_open() is a callback from the input open routine.
 */

static int adi_open(struct input_dev *dev)
{
	struct adi_port *port = input_get_drvdata(dev);

	gameport_start_polling(port->gameport);
	return 0;
}

/*
 * adi_close() is a callback from the input close routine.
 */

static void adi_close(struct input_dev *dev)
{
	struct adi_port *port = input_get_drvdata(dev);

	gameport_stop_polling(port->gameport);
}

/*
 * adi_init_digital() sends a trigger & delay sequence
 * to reset and initialize a Logitech joystick into digital mode.
 */

static void adi_init_digital(struct gameport *gameport)
{
	int seq[] = { 4, -2, -3, 10, -6, -11, -7, -9, 11, 0 };
	int i;

	for (i = 0; seq[i]; i++) {
		gameport_trigger(gameport);
		if (seq[i] > 0)
			msleep(seq[i]);
		if (seq[i] < 0) {
			mdelay(-seq[i]);
			udelay(-seq[i]*14);	/* It looks like mdelay() is off by approx 1.4% */
		}
	}
}

static void adi_id_decode(struct adi *adi, struct adi_port *port)
{
	int i, t;

	if (adi->ret < ADI_MIN_ID_LENGTH) /* Minimum ID packet length */
		return;

	if (adi->ret < (t = adi_get_bits(adi, 10))) {
		printk(KERN_WARNING "adi: Short ID packet: reported: %d != read: %d\n", t, adi->ret);
		return;
	}

	adi->id = adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4);

	if ((t = adi_get_bits(adi, 4)) & ADI_FLAG_HAT) adi->hats++;

	adi->length = adi_get_bits(adi, 10);

	if (adi->length >= ADI_MAX_LENGTH || adi->length < ADI_MIN_LENGTH) {
		printk(KERN_WARNING "adi: Bad data packet length (%d).\n", adi->length);
		adi->length = 0;
		return;
	}

	adi->axes8 = adi_get_bits(adi, 4);
	adi->buttons = adi_get_bits(adi, 6);

	if (adi_get_bits(adi, 6) != 8 && adi->hats) {
		printk(KERN_WARNING "adi: Other than 8-dir POVs not supported yet.\n");
		adi->length = 0;
		return;
	}

	adi->buttons += adi_get_bits(adi, 6);
	adi->hats += adi_get_bits(adi, 4);

	i = adi_get_bits(adi, 4);

	if (t & ADI_FLAG_10BIT) {
		adi->axes10 = adi->axes8 - i;
		adi->axes8 = i;
	}

	t = adi_get_bits(adi, 4);

	for (i = 0; i < t; i++)
		adi->cname[i] = adi_get_bits(adi, 8);
	adi->cname[i] = 0;

	t = 8 + adi->buttons + adi->axes10 * 10 + adi->axes8 * 8 + adi->hats * 4;
	if (adi->length != t && adi->length != t + (t & 1)) {
		printk(KERN_WARNING "adi: Expected length %d != data length %d\n", t, adi->length);
		adi->length = 0;
		return;
	}

	switch (adi->id) {
		case ADI_ID_TPD:
			adi->pad = 4;
			adi->buttons -= 4;
			break;
		case ADI_ID_WGP:
			adi->pad = 0;
			adi->buttons -= 4;
			break;
		default:
			adi->pad = -1;
			break;
	}
}

static int adi_init_input(struct adi *adi, struct adi_port *port, int half)
{
	struct input_dev *input_dev;
	char buf[ADI_MAX_NAME_LENGTH];
	int i, t;

	adi->dev = input_dev = input_allocate_device();
	if (!input_dev)
		return -ENOMEM;

	t = adi->id < ADI_ID_MAX ? adi->id : ADI_ID_MAX;

	snprintf(buf, ADI_MAX_PHYS_LENGTH, adi_names[t], adi->id);
	snprintf(adi->name, ADI_MAX_NAME_LENGTH, "Logitech %s [%s]", buf, adi->cname);
	snprintf(adi->phys, ADI_MAX_PHYS_LENGTH, "%s/input%d", port->gameport->phys, half);

	adi->abs = adi_abs[t];
	adi->key = adi_key[t];

	input_dev->name = adi->name;
	input_dev->phys = adi->phys;
	input_dev->id.bustype = BUS_GAMEPORT;
	input_dev->id.vendor = GAMEPORT_ID_VENDOR_LOGITECH;
	input_dev->id.product = adi->id;
	input_dev->id.version = 0x0100;
	input_dev->dev.parent = &port->gameport->dev;

	input_set_drvdata(input_dev, port);

	input_dev->open = adi_open;
	input_dev->close = adi_close;

	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);

	for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++)
		set_bit(adi->abs[i], input_dev->absbit);

	for (i = 0; i < adi->buttons; i++)
		set_bit(adi->key[i], input_dev->keybit);

	return 0;
}

static void adi_init_center(struct adi *adi)
{
	int i, t, x;

	if (!adi->length)
		return;

	for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++) {

		t = adi->abs[i];
		x = adi->dev->abs[t];

		if (t == ABS_THROTTLE || t == ABS_RUDDER || adi->id == ADI_ID_WGPE)
			x = i < adi->axes10 ? 512 : 128;

		if (i < adi->axes10)
			input_set_abs_params(adi->dev, t, 64, x * 2 - 64, 2, 16);
		else if (i < adi->axes10 + adi->axes8)
			input_set_abs_params(adi->dev, t, 48, x * 2 - 48, 1, 16);
		else
			input_set_abs_params(adi->dev, t, -1, 1, 0, 0);
	}
}

/*
 * adi_connect() probes for Logitech ADI joysticks.
 */

static int adi_connect(struct gameport *gameport, struct gameport_driver *drv)
{
	struct adi_port *port;
	int i;
	int err;

	port = kzalloc(sizeof(struct adi_port), GFP_KERNEL);
	if (!port)
		return -ENOMEM;

	port->gameport = gameport;

	gameport_set_drvdata(gameport, port);

	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
	if (err)
		goto fail1;

	adi_init_digital(gameport);
	adi_read_packet(port);

	if (port->adi[0].ret >= ADI_MIN_LEN_LENGTH)
		adi_move_bits(port, adi_get_bits(port->adi, 10));

	for (i = 0; i < 2; i++) {
		adi_id_decode(port->adi + i, port);

		if (!port->adi[i].length)
			continue;

		err = adi_init_input(port->adi + i, port, i);
		if (err)
			goto fail2;
	}

	if (!port->adi[0].length && !port->adi[1].length) {
		err = -ENODEV;
		goto fail2;
	}

	gameport_set_poll_handler(gameport, adi_poll);
	gameport_set_poll_interval(gameport, 20);

	msleep(ADI_INIT_DELAY);
	if (adi_read(port)) {
		msleep(ADI_DATA_DELAY);
		adi_read(port);
	}

	for (i = 0; i < 2; i++)
		if (port->adi[i].length > 0) {
			adi_init_center(port->adi + i);
			err = input_register_device(port->adi[i].dev);
			if (err)
				goto fail3;
		}

	return 0;

 fail3: while (--i >= 0) {
		if (port->adi[i].length > 0) {
			input_unregister_device(port->adi[i].dev);
			port->adi[i].dev = NULL;
		}
	}
 fail2:	for (i = 0; i < 2; i++)
		if (port->adi[i].dev)
			input_free_device(port->adi[i].dev);
	gameport_close(gameport);
 fail1:	gameport_set_drvdata(gameport, NULL);
	kfree(port);
	return err;
}

static void adi_disconnect(struct gameport *gameport)
{
	int i;
	struct adi_port *port = gameport_get_drvdata(gameport);

	for (i = 0; i < 2; i++)
		if (port->adi[i].length > 0)
			input_unregister_device(port->adi[i].dev);
	gameport_close(gameport);
	gameport_set_drvdata(gameport, NULL);
	kfree(port);
}

/*
 * The gameport device structure.
 */

static struct gameport_driver adi_drv = {
	.driver		= {
		.name	= "adi",
	},
	.description	= DRIVER_DESC,
	.connect	= adi_connect,
	.disconnect	= adi_disconnect,
};

static int __init adi_init(void)
{
	return gameport_register_driver(&adi_drv);
}

static void __exit adi_exit(void)
{
	gameport_unregister_driver(&adi_drv);
}

module_init(adi_init);
module_exit(adi_exit);