summaryrefslogtreecommitdiff
path: root/sound/firewire/bebob/bebob_maudio.c
blob: 51152ca4af57ba9c46eb5d0371852d94007a7650 (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
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
/*
 * bebob_maudio.c - a part of driver for BeBoB based devices
 *
 * Copyright (c) 2013-2014 Takashi Sakamoto
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */

#include "./bebob.h"
#include <sound/control.h>

/*
 * Just powering on, Firewire 410/Audiophile/1814 and ProjectMix I/O wait to
 * download firmware blob. To enable these devices, drivers should upload
 * firmware blob and send a command to initialize configuration to factory
 * settings when completing uploading. Then these devices generate bus reset
 * and are recognized as new devices with the firmware.
 *
 * But with firmware version 5058 or later, the firmware is stored to flash
 * memory in the device and drivers can tell bootloader to load the firmware
 * by sending a cue. This cue must be sent one time.
 *
 * For streaming, both of output and input streams are needed for Firewire 410
 * and Ozonic. The single stream is OK for the other devices even if the clock
 * source is not SYT-Match (I note no devices use SYT-Match).
 *
 * Without streaming, the devices except for Firewire Audiophile can mix any
 * input and output. For this reason, Audiophile cannot be used as standalone
 * mixer.
 *
 * Firewire 1814 and ProjectMix I/O uses special firmware. It will be freezed
 * when receiving any commands which the firmware can't understand. These
 * devices utilize completely different system to control. It is some
 * write-transaction directly into a certain address. All of addresses for mixer
 * functionality is between 0xffc700700000 to 0xffc70070009c.
 */

/* Offset from information register */
#define INFO_OFFSET_SW_DATE	0x20

/* Bootloader Protocol Version 1 */
#define MAUDIO_BOOTLOADER_CUE1	0x00000001
/*
 * Initializing configuration to factory settings (= 0x1101), (swapped in line),
 * Command code is zero (= 0x00),
 * the number of operands is zero (= 0x00)(at least significant byte)
 */
#define MAUDIO_BOOTLOADER_CUE2	0x01110000
/* padding */
#define MAUDIO_BOOTLOADER_CUE3	0x00000000

#define MAUDIO_SPECIFIC_ADDRESS	0xffc700000000ULL

#define METER_OFFSET		0x00600000

/* some device has sync info after metering data */
#define METER_SIZE_SPECIAL	84	/* with sync info */
#define METER_SIZE_FW410	76	/* with sync info */
#define METER_SIZE_AUDIOPHILE	60	/* with sync info */
#define METER_SIZE_SOLO		52	/* with sync info */
#define METER_SIZE_OZONIC	48
#define METER_SIZE_NRV10	80

/* labels for metering */
#define ANA_IN		"Analog In"
#define ANA_OUT		"Analog Out"
#define DIG_IN		"Digital In"
#define SPDIF_IN	"S/PDIF In"
#define ADAT_IN		"ADAT In"
#define DIG_OUT		"Digital Out"
#define SPDIF_OUT	"S/PDIF Out"
#define ADAT_OUT	"ADAT Out"
#define STRM_IN		"Stream In"
#define AUX_OUT		"Aux Out"
#define HP_OUT		"HP Out"
/* for NRV */
#define UNKNOWN_METER	"Unknown"

struct special_params {
	bool is1814;
	unsigned int clk_src;
	unsigned int dig_in_fmt;
	unsigned int dig_out_fmt;
	unsigned int clk_lock;
	struct snd_ctl_elem_id *ctl_id_sync;
};

/*
 * For some M-Audio devices, this module just send cue to load firmware. After
 * loading, the device generates bus reset and newly detected.
 *
 * If we make any transactions to load firmware, the operation may failed.
 */
int snd_bebob_maudio_load_firmware(struct fw_unit *unit)
{
	struct fw_device *device = fw_parent_device(unit);
	int err, rcode;
	u64 date;
	__le32 *cues;

	/* check date of software used to build */
	err = snd_bebob_read_block(unit, INFO_OFFSET_SW_DATE,
				   &date, sizeof(u64));
	if (err < 0)
		return err;
	/*
	 * firmware version 5058 or later has date later than "20070401", but
	 * 'date' is not null-terminated.
	 */
	if (date < 0x3230303730343031LL) {
		dev_err(&unit->device,
			"Use firmware version 5058 or later\n");
		return -ENXIO;
	}

	cues = kmalloc_array(3, sizeof(*cues), GFP_KERNEL);
	if (!cues)
		return -ENOMEM;

	cues[0] = cpu_to_le32(MAUDIO_BOOTLOADER_CUE1);
	cues[1] = cpu_to_le32(MAUDIO_BOOTLOADER_CUE2);
	cues[2] = cpu_to_le32(MAUDIO_BOOTLOADER_CUE3);

	rcode = fw_run_transaction(device->card, TCODE_WRITE_BLOCK_REQUEST,
				   device->node_id, device->generation,
				   device->max_speed, BEBOB_ADDR_REG_REQ,
				   cues, 3 * sizeof(*cues));
	kfree(cues);
	if (rcode != RCODE_COMPLETE) {
		dev_err(&unit->device,
			"Failed to send a cue to load firmware\n");
		err = -EIO;
	}

	return err;
}

static inline int
get_meter(struct snd_bebob *bebob, void *buf, unsigned int size)
{
	return snd_fw_transaction(bebob->unit, TCODE_READ_BLOCK_REQUEST,
				  MAUDIO_SPECIFIC_ADDRESS + METER_OFFSET,
				  buf, size, 0);
}

static int
check_clk_sync(struct snd_bebob *bebob, unsigned int size, bool *sync)
{
	int err;
	u8 *buf;

	buf = kmalloc(size, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

	err = get_meter(bebob, buf, size);
	if (err < 0)
		goto end;

	/* if synced, this value is the same as SFC of FDF in CIP header */
	*sync = (buf[size - 2] != 0xff);
end:
	kfree(buf);
	return err;
}

/*
 * dig_fmt: 0x00:S/PDIF, 0x01:ADAT
 * clk_lock: 0x00:unlock, 0x01:lock
 */
static int
avc_maudio_set_special_clk(struct snd_bebob *bebob, unsigned int clk_src,
			   unsigned int dig_in_fmt, unsigned int dig_out_fmt,
			   unsigned int clk_lock)
{
	struct special_params *params = bebob->maudio_special_quirk;
	int err;
	u8 *buf;

	if (amdtp_stream_running(&bebob->rx_stream) ||
	    amdtp_stream_running(&bebob->tx_stream))
		return -EBUSY;

	buf = kmalloc(12, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

	buf[0]  = 0x00;		/* CONTROL */
	buf[1]  = 0xff;		/* UNIT */
	buf[2]  = 0x00;		/* vendor dependent */
	buf[3]  = 0x04;		/* company ID high */
	buf[4]  = 0x00;		/* company ID middle */
	buf[5]  = 0x04;		/* company ID low */
	buf[6]  = 0xff & clk_src;	/* clock source */
	buf[7]  = 0xff & dig_in_fmt;	/* input digital format */
	buf[8]  = 0xff & dig_out_fmt;	/* output digital format */
	buf[9]  = 0xff & clk_lock;	/* lock these settings */
	buf[10] = 0x00;		/* padding  */
	buf[11] = 0x00;		/* padding */

	err = fcp_avc_transaction(bebob->unit, buf, 12, buf, 12,
				  BIT(1) | BIT(2) | BIT(3) | BIT(4) |
				  BIT(5) | BIT(6) | BIT(7) | BIT(8) |
				  BIT(9));
	if ((err > 0) && (err < 10))
		err = -EIO;
	else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
		err = -ENOSYS;
	else if (buf[0] == 0x0a) /* REJECTED */
		err = -EINVAL;
	if (err < 0)
		goto end;

	params->clk_src		= buf[6];
	params->dig_in_fmt	= buf[7];
	params->dig_out_fmt	= buf[8];
	params->clk_lock	= buf[9];

	if (params->ctl_id_sync)
		snd_ctl_notify(bebob->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       params->ctl_id_sync);

	err = 0;
end:
	kfree(buf);
	return err;
}
static void
special_stream_formation_set(struct snd_bebob *bebob)
{
	static const unsigned int ch_table[2][2][3] = {
		/* AMDTP_OUT_STREAM */
		{ {  6,  6,  4 },	/* SPDIF */
		  { 12,  8,  4 } },	/* ADAT */
		/* AMDTP_IN_STREAM */
		{ { 10, 10,  2 },	/* SPDIF */
		  { 16, 12,  2 } }	/* ADAT */
	};
	struct special_params *params = bebob->maudio_special_quirk;
	unsigned int i, max;

	max = SND_BEBOB_STRM_FMT_ENTRIES - 1;
	if (!params->is1814)
		max -= 2;

	for (i = 0; i < max; i++) {
		bebob->tx_stream_formations[i + 1].pcm =
			ch_table[AMDTP_IN_STREAM][params->dig_in_fmt][i / 2];
		bebob->tx_stream_formations[i + 1].midi = 1;

		bebob->rx_stream_formations[i + 1].pcm =
			ch_table[AMDTP_OUT_STREAM][params->dig_out_fmt][i / 2];
		bebob->rx_stream_formations[i + 1].midi = 1;
	}
}

static int add_special_controls(struct snd_bebob *bebob);
int
snd_bebob_maudio_special_discover(struct snd_bebob *bebob, bool is1814)
{
	struct special_params *params;
	int err;

	params = devm_kzalloc(&bebob->card->card_dev,
			      sizeof(struct special_params), GFP_KERNEL);
	if (!params)
		return -ENOMEM;

	mutex_lock(&bebob->mutex);

	bebob->maudio_special_quirk = (void *)params;
	params->is1814 = is1814;

	/* initialize these parameters because driver is not allowed to ask */
	bebob->rx_stream.context = ERR_PTR(-1);
	bebob->tx_stream.context = ERR_PTR(-1);
	err = avc_maudio_set_special_clk(bebob, 0x03, 0x00, 0x00, 0x00);
	if (err < 0) {
		dev_err(&bebob->unit->device,
			"fail to initialize clock params: %d\n", err);
		goto end;
	}

	err = add_special_controls(bebob);
	if (err < 0)
		goto end;

	special_stream_formation_set(bebob);

	if (params->is1814) {
		bebob->midi_input_ports = 1;
		bebob->midi_output_ports = 1;
	} else {
		bebob->midi_input_ports = 2;
		bebob->midi_output_ports = 2;
	}
end:
	mutex_unlock(&bebob->mutex);
	return err;
}

/* Input plug shows actual rate. Output plug is needless for this purpose. */
static int special_get_rate(struct snd_bebob *bebob, unsigned int *rate)
{
	int err, trials;

	trials = 0;
	do {
		err = avc_general_get_sig_fmt(bebob->unit, rate,
					      AVC_GENERAL_PLUG_DIR_IN, 0);
	} while (err == -EAGAIN && ++trials < 3);

	return err;
}
static int special_set_rate(struct snd_bebob *bebob, unsigned int rate)
{
	struct special_params *params = bebob->maudio_special_quirk;
	int err;

	err = avc_general_set_sig_fmt(bebob->unit, rate,
				      AVC_GENERAL_PLUG_DIR_OUT, 0);
	if (err < 0)
		goto end;

	/*
	 * Just after changing sampling rate for output, a followed command
	 * for input is easy to fail. This is a workaround fot this issue.
	 */
	msleep(100);

	err = avc_general_set_sig_fmt(bebob->unit, rate,
				      AVC_GENERAL_PLUG_DIR_IN, 0);
	if (err < 0)
		goto end;

	if (params->ctl_id_sync)
		snd_ctl_notify(bebob->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       params->ctl_id_sync);
end:
	return err;
}

/* Clock source control for special firmware */
static const enum snd_bebob_clock_type special_clk_types[] = {
	SND_BEBOB_CLOCK_TYPE_INTERNAL,	/* With digital mute */
	SND_BEBOB_CLOCK_TYPE_EXTERNAL,	/* SPDIF/ADAT */
	SND_BEBOB_CLOCK_TYPE_EXTERNAL,	/* Word Clock */
	SND_BEBOB_CLOCK_TYPE_INTERNAL,
};
static int special_clk_get(struct snd_bebob *bebob, unsigned int *id)
{
	struct special_params *params = bebob->maudio_special_quirk;
	*id = params->clk_src;
	return 0;
}
static int special_clk_ctl_info(struct snd_kcontrol *kctl,
				struct snd_ctl_elem_info *einf)
{
	static const char *const special_clk_labels[] = {
		"Internal with Digital Mute",
		"Digital",
		"Word Clock",
		"Internal"
	};
	return snd_ctl_enum_info(einf, 1, ARRAY_SIZE(special_clk_types),
				 special_clk_labels);
}
static int special_clk_ctl_get(struct snd_kcontrol *kctl,
			       struct snd_ctl_elem_value *uval)
{
	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
	struct special_params *params = bebob->maudio_special_quirk;
	uval->value.enumerated.item[0] = params->clk_src;
	return 0;
}
static int special_clk_ctl_put(struct snd_kcontrol *kctl,
			       struct snd_ctl_elem_value *uval)
{
	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
	struct special_params *params = bebob->maudio_special_quirk;
	int err, id;

	id = uval->value.enumerated.item[0];
	if (id >= ARRAY_SIZE(special_clk_types))
		return -EINVAL;

	mutex_lock(&bebob->mutex);

	err = avc_maudio_set_special_clk(bebob, id,
					 params->dig_in_fmt,
					 params->dig_out_fmt,
					 params->clk_lock);
	mutex_unlock(&bebob->mutex);

	if (err >= 0)
		err = 1;

	return err;
}
static const struct snd_kcontrol_new special_clk_ctl = {
	.name	= "Clock Source",
	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
	.access	= SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.info	= special_clk_ctl_info,
	.get	= special_clk_ctl_get,
	.put	= special_clk_ctl_put
};

/* Clock synchronization control for special firmware */
static int special_sync_ctl_info(struct snd_kcontrol *kctl,
				 struct snd_ctl_elem_info *einf)
{
	einf->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	einf->count = 1;
	einf->value.integer.min = 0;
	einf->value.integer.max = 1;

	return 0;
}
static int special_sync_ctl_get(struct snd_kcontrol *kctl,
				struct snd_ctl_elem_value *uval)
{
	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
	int err;
	bool synced = 0;

	err = check_clk_sync(bebob, METER_SIZE_SPECIAL, &synced);
	if (err >= 0)
		uval->value.integer.value[0] = synced;

	return 0;
}
static const struct snd_kcontrol_new special_sync_ctl = {
	.name	= "Sync Status",
	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
	.access	= SNDRV_CTL_ELEM_ACCESS_READ,
	.info	= special_sync_ctl_info,
	.get	= special_sync_ctl_get,
};

/* Digital input interface control for special firmware */
static const char *const special_dig_in_iface_labels[] = {
	"S/PDIF Optical", "S/PDIF Coaxial", "ADAT Optical"
};
static int special_dig_in_iface_ctl_info(struct snd_kcontrol *kctl,
					 struct snd_ctl_elem_info *einf)
{
	return snd_ctl_enum_info(einf, 1,
				 ARRAY_SIZE(special_dig_in_iface_labels),
				 special_dig_in_iface_labels);
}
static int special_dig_in_iface_ctl_get(struct snd_kcontrol *kctl,
					struct snd_ctl_elem_value *uval)
{
	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
	struct special_params *params = bebob->maudio_special_quirk;
	unsigned int dig_in_iface;
	int err, val;

	mutex_lock(&bebob->mutex);

	err = avc_audio_get_selector(bebob->unit, 0x00, 0x04,
				     &dig_in_iface);
	if (err < 0) {
		dev_err(&bebob->unit->device,
			"fail to get digital input interface: %d\n", err);
		goto end;
	}

	/* encoded id for user value */
	val = (params->dig_in_fmt << 1) | (dig_in_iface & 0x01);

	/* for ADAT Optical */
	if (val > 2)
		val = 2;

	uval->value.enumerated.item[0] = val;
end:
	mutex_unlock(&bebob->mutex);
	return err;
}
static int special_dig_in_iface_ctl_set(struct snd_kcontrol *kctl,
					struct snd_ctl_elem_value *uval)
{
	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
	struct special_params *params = bebob->maudio_special_quirk;
	unsigned int id, dig_in_fmt, dig_in_iface;
	int err;

	id = uval->value.enumerated.item[0];
	if (id >= ARRAY_SIZE(special_dig_in_iface_labels))
		return -EINVAL;

	/* decode user value */
	dig_in_fmt = (id >> 1) & 0x01;
	dig_in_iface = id & 0x01;

	mutex_lock(&bebob->mutex);

	err = avc_maudio_set_special_clk(bebob,
					 params->clk_src,
					 dig_in_fmt,
					 params->dig_out_fmt,
					 params->clk_lock);
	if (err < 0)
		goto end;

	/* For ADAT, optical interface is only available. */
	if (params->dig_in_fmt > 0) {
		err = 1;
		goto end;
	}

	/* For S/PDIF, optical/coaxial interfaces are selectable. */
	err = avc_audio_set_selector(bebob->unit, 0x00, 0x04, dig_in_iface);
	if (err < 0)
		dev_err(&bebob->unit->device,
			"fail to set digital input interface: %d\n", err);
	err = 1;
end:
	special_stream_formation_set(bebob);
	mutex_unlock(&bebob->mutex);
	return err;
}
static const struct snd_kcontrol_new special_dig_in_iface_ctl = {
	.name	= "Digital Input Interface",
	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
	.access	= SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.info	= special_dig_in_iface_ctl_info,
	.get	= special_dig_in_iface_ctl_get,
	.put	= special_dig_in_iface_ctl_set
};

/* Digital output interface control for special firmware */
static const char *const special_dig_out_iface_labels[] = {
	"S/PDIF Optical and Coaxial", "ADAT Optical"
};
static int special_dig_out_iface_ctl_info(struct snd_kcontrol *kctl,
					  struct snd_ctl_elem_info *einf)
{
	return snd_ctl_enum_info(einf, 1,
				 ARRAY_SIZE(special_dig_out_iface_labels),
				 special_dig_out_iface_labels);
}
static int special_dig_out_iface_ctl_get(struct snd_kcontrol *kctl,
					 struct snd_ctl_elem_value *uval)
{
	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
	struct special_params *params = bebob->maudio_special_quirk;
	mutex_lock(&bebob->mutex);
	uval->value.enumerated.item[0] = params->dig_out_fmt;
	mutex_unlock(&bebob->mutex);
	return 0;
}
static int special_dig_out_iface_ctl_set(struct snd_kcontrol *kctl,
					 struct snd_ctl_elem_value *uval)
{
	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
	struct special_params *params = bebob->maudio_special_quirk;
	unsigned int id;
	int err;

	id = uval->value.enumerated.item[0];
	if (id >= ARRAY_SIZE(special_dig_out_iface_labels))
		return -EINVAL;

	mutex_lock(&bebob->mutex);

	err = avc_maudio_set_special_clk(bebob,
					 params->clk_src,
					 params->dig_in_fmt,
					 id, params->clk_lock);
	if (err >= 0) {
		special_stream_formation_set(bebob);
		err = 1;
	}

	mutex_unlock(&bebob->mutex);
	return err;
}
static const struct snd_kcontrol_new special_dig_out_iface_ctl = {
	.name	= "Digital Output Interface",
	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
	.access	= SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.info	= special_dig_out_iface_ctl_info,
	.get	= special_dig_out_iface_ctl_get,
	.put	= special_dig_out_iface_ctl_set
};

static int add_special_controls(struct snd_bebob *bebob)
{
	struct snd_kcontrol *kctl;
	struct special_params *params = bebob->maudio_special_quirk;
	int err;

	kctl = snd_ctl_new1(&special_clk_ctl, bebob);
	err = snd_ctl_add(bebob->card, kctl);
	if (err < 0)
		goto end;

	kctl = snd_ctl_new1(&special_sync_ctl, bebob);
	err = snd_ctl_add(bebob->card, kctl);
	if (err < 0)
		goto end;
	params->ctl_id_sync = &kctl->id;

	kctl = snd_ctl_new1(&special_dig_in_iface_ctl, bebob);
	err = snd_ctl_add(bebob->card, kctl);
	if (err < 0)
		goto end;

	kctl = snd_ctl_new1(&special_dig_out_iface_ctl, bebob);
	err = snd_ctl_add(bebob->card, kctl);
end:
	return err;
}

/* Hardware metering for special firmware */
static const char *const special_meter_labels[] = {
	ANA_IN, ANA_IN, ANA_IN, ANA_IN,
	SPDIF_IN,
	ADAT_IN, ADAT_IN, ADAT_IN, ADAT_IN,
	ANA_OUT, ANA_OUT,
	SPDIF_OUT,
	ADAT_OUT, ADAT_OUT, ADAT_OUT, ADAT_OUT,
	HP_OUT, HP_OUT,
	AUX_OUT
};
static int
special_meter_get(struct snd_bebob *bebob, u32 *target, unsigned int size)
{
	__be16 *buf;
	unsigned int i, c, channels;
	int err;

	channels = ARRAY_SIZE(special_meter_labels) * 2;
	if (size < channels * sizeof(u32))
		return -EINVAL;

	/* omit last 4 bytes because it's clock info. */
	buf = kmalloc(METER_SIZE_SPECIAL - 4, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

	err = get_meter(bebob, (void *)buf, METER_SIZE_SPECIAL - 4);
	if (err < 0)
		goto end;

	/* Its format is u16 and some channels are unknown. */
	i = 0;
	for (c = 2; c < channels + 2; c++)
		target[i++] = be16_to_cpu(buf[c]) << 16;
end:
	kfree(buf);
	return err;
}

/* last 4 bytes are omitted because it's clock info. */
static const char *const fw410_meter_labels[] = {
	ANA_IN, DIG_IN,
	ANA_OUT, ANA_OUT, ANA_OUT, ANA_OUT, DIG_OUT,
	HP_OUT
};
static const char *const audiophile_meter_labels[] = {
	ANA_IN, DIG_IN,
	ANA_OUT, ANA_OUT, DIG_OUT,
	HP_OUT, AUX_OUT,
};
static const char *const solo_meter_labels[] = {
	ANA_IN, DIG_IN,
	STRM_IN, STRM_IN,
	ANA_OUT, DIG_OUT
};

/* no clock info */
static const char *const ozonic_meter_labels[] = {
	ANA_IN, ANA_IN,
	STRM_IN, STRM_IN,
	ANA_OUT, ANA_OUT
};
/* TODO: need testers. these positions are based on authour's assumption */
static const char *const nrv10_meter_labels[] = {
	ANA_IN, ANA_IN, ANA_IN, ANA_IN,
	DIG_IN,
	ANA_OUT, ANA_OUT, ANA_OUT, ANA_OUT,
	DIG_IN
};
static int
normal_meter_get(struct snd_bebob *bebob, u32 *buf, unsigned int size)
{
	const struct snd_bebob_meter_spec *spec = bebob->spec->meter;
	unsigned int c, channels;
	int err;

	channels = spec->num * 2;
	if (size < channels * sizeof(u32))
		return -EINVAL;

	err = get_meter(bebob, (void *)buf, size);
	if (err < 0)
		goto end;

	for (c = 0; c < channels; c++)
		be32_to_cpus(&buf[c]);

	/* swap stream channels because inverted */
	if (spec->labels == solo_meter_labels) {
		swap(buf[4], buf[6]);
		swap(buf[5], buf[7]);
	}
end:
	return err;
}

/* for special customized devices */
static const struct snd_bebob_rate_spec special_rate_spec = {
	.get	= &special_get_rate,
	.set	= &special_set_rate,
};
static const struct snd_bebob_clock_spec special_clk_spec = {
	.num	= ARRAY_SIZE(special_clk_types),
	.types	= special_clk_types,
	.get	= &special_clk_get,
};
static const struct snd_bebob_meter_spec special_meter_spec = {
	.num	= ARRAY_SIZE(special_meter_labels),
	.labels	= special_meter_labels,
	.get	= &special_meter_get
};
const struct snd_bebob_spec maudio_special_spec = {
	.clock	= &special_clk_spec,
	.rate	= &special_rate_spec,
	.meter	= &special_meter_spec
};

/* Firewire 410 specification */
static const struct snd_bebob_rate_spec usual_rate_spec = {
	.get	= &snd_bebob_stream_get_rate,
	.set	= &snd_bebob_stream_set_rate,
};
static const struct snd_bebob_meter_spec fw410_meter_spec = {
	.num	= ARRAY_SIZE(fw410_meter_labels),
	.labels	= fw410_meter_labels,
	.get	= &normal_meter_get
};
const struct snd_bebob_spec maudio_fw410_spec = {
	.clock	= NULL,
	.rate	= &usual_rate_spec,
	.meter	= &fw410_meter_spec
};

/* Firewire Audiophile specification */
static const struct snd_bebob_meter_spec audiophile_meter_spec = {
	.num	= ARRAY_SIZE(audiophile_meter_labels),
	.labels	= audiophile_meter_labels,
	.get	= &normal_meter_get
};
const struct snd_bebob_spec maudio_audiophile_spec = {
	.clock	= NULL,
	.rate	= &usual_rate_spec,
	.meter	= &audiophile_meter_spec
};

/* Firewire Solo specification */
static const struct snd_bebob_meter_spec solo_meter_spec = {
	.num	= ARRAY_SIZE(solo_meter_labels),
	.labels	= solo_meter_labels,
	.get	= &normal_meter_get
};
const struct snd_bebob_spec maudio_solo_spec = {
	.clock	= NULL,
	.rate	= &usual_rate_spec,
	.meter	= &solo_meter_spec
};

/* Ozonic specification */
static const struct snd_bebob_meter_spec ozonic_meter_spec = {
	.num	= ARRAY_SIZE(ozonic_meter_labels),
	.labels	= ozonic_meter_labels,
	.get	= &normal_meter_get
};
const struct snd_bebob_spec maudio_ozonic_spec = {
	.clock	= NULL,
	.rate	= &usual_rate_spec,
	.meter	= &ozonic_meter_spec
};

/* NRV10 specification */
static const struct snd_bebob_meter_spec nrv10_meter_spec = {
	.num	= ARRAY_SIZE(nrv10_meter_labels),
	.labels	= nrv10_meter_labels,
	.get	= &normal_meter_get
};
const struct snd_bebob_spec maudio_nrv10_spec = {
	.clock	= NULL,
	.rate	= &usual_rate_spec,
	.meter	= &nrv10_meter_spec
};