1 /*
2  * bebob_maudio.c - a part of driver for BeBoB based devices
3  *
4  * Copyright (c) 2013-2014 Takashi Sakamoto
5  *
6  * Licensed under the terms of the GNU General Public License, version 2.
7  */
8 
9 #include "./bebob.h"
10 #include <sound/control.h>
11 
12 /*
13  * Just powering on, Firewire 410/Audiophile/1814 and ProjectMix I/O wait to
14  * download firmware blob. To enable these devices, drivers should upload
15  * firmware blob and send a command to initialize configuration to factory
16  * settings when completing uploading. Then these devices generate bus reset
17  * and are recognized as new devices with the firmware.
18  *
19  * But with firmware version 5058 or later, the firmware is stored to flash
20  * memory in the device and drivers can tell bootloader to load the firmware
21  * by sending a cue. This cue must be sent one time.
22  *
23  * For streaming, both of output and input streams are needed for Firewire 410
24  * and Ozonic. The single stream is OK for the other devices even if the clock
25  * source is not SYT-Match (I note no devices use SYT-Match).
26  *
27  * Without streaming, the devices except for Firewire Audiophile can mix any
28  * input and output. For this reason, Audiophile cannot be used as standalone
29  * mixer.
30  *
31  * Firewire 1814 and ProjectMix I/O uses special firmware. It will be freezed
32  * when receiving any commands which the firmware can't understand. These
33  * devices utilize completely different system to control. It is some
34  * write-transaction directly into a certain address. All of addresses for mixer
35  * functionality is between 0xffc700700000 to 0xffc70070009c.
36  */
37 
38 /* Offset from information register */
39 #define INFO_OFFSET_SW_DATE	0x20
40 
41 /* Bootloader Protocol Version 1 */
42 #define MAUDIO_BOOTLOADER_CUE1	0x00000001
43 /*
44  * Initializing configuration to factory settings (= 0x1101), (swapped in line),
45  * Command code is zero (= 0x00),
46  * the number of operands is zero (= 0x00)(at least significant byte)
47  */
48 #define MAUDIO_BOOTLOADER_CUE2	0x01110000
49 /* padding */
50 #define MAUDIO_BOOTLOADER_CUE3	0x00000000
51 
52 #define MAUDIO_SPECIFIC_ADDRESS	0xffc700000000ULL
53 
54 #define METER_OFFSET		0x00600000
55 
56 /* some device has sync info after metering data */
57 #define METER_SIZE_SPECIAL	84	/* with sync info */
58 #define METER_SIZE_FW410	76	/* with sync info */
59 #define METER_SIZE_AUDIOPHILE	60	/* with sync info */
60 #define METER_SIZE_SOLO		52	/* with sync info */
61 #define METER_SIZE_OZONIC	48
62 #define METER_SIZE_NRV10	80
63 
64 /* labels for metering */
65 #define ANA_IN		"Analog In"
66 #define ANA_OUT		"Analog Out"
67 #define DIG_IN		"Digital In"
68 #define SPDIF_IN	"S/PDIF In"
69 #define ADAT_IN		"ADAT In"
70 #define DIG_OUT		"Digital Out"
71 #define SPDIF_OUT	"S/PDIF Out"
72 #define ADAT_OUT	"ADAT Out"
73 #define STRM_IN		"Stream In"
74 #define AUX_OUT		"Aux Out"
75 #define HP_OUT		"HP Out"
76 /* for NRV */
77 #define UNKNOWN_METER	"Unknown"
78 
79 struct special_params {
80 	bool is1814;
81 	unsigned int clk_src;
82 	unsigned int dig_in_fmt;
83 	unsigned int dig_out_fmt;
84 	unsigned int clk_lock;
85 	struct snd_ctl_elem_id *ctl_id_sync;
86 };
87 
88 /*
89  * For some M-Audio devices, this module just send cue to load firmware. After
90  * loading, the device generates bus reset and newly detected.
91  *
92  * If we make any transactions to load firmware, the operation may failed.
93  */
94 int snd_bebob_maudio_load_firmware(struct fw_unit *unit)
95 {
96 	struct fw_device *device = fw_parent_device(unit);
97 	int err, rcode;
98 	u64 date;
99 	__le32 cues[3] = {
100 		cpu_to_le32(MAUDIO_BOOTLOADER_CUE1),
101 		cpu_to_le32(MAUDIO_BOOTLOADER_CUE2),
102 		cpu_to_le32(MAUDIO_BOOTLOADER_CUE3)
103 	};
104 
105 	/* check date of software used to build */
106 	err = snd_bebob_read_block(unit, INFO_OFFSET_SW_DATE,
107 				   &date, sizeof(u64));
108 	if (err < 0)
109 		goto end;
110 	/*
111 	 * firmware version 5058 or later has date later than "20070401", but
112 	 * 'date' is not null-terminated.
113 	 */
114 	if (date < 0x3230303730343031LL) {
115 		dev_err(&unit->device,
116 			"Use firmware version 5058 or later\n");
117 		err = -ENOSYS;
118 		goto end;
119 	}
120 
121 	rcode = fw_run_transaction(device->card, TCODE_WRITE_BLOCK_REQUEST,
122 				   device->node_id, device->generation,
123 				   device->max_speed, BEBOB_ADDR_REG_REQ,
124 				   cues, sizeof(cues));
125 	if (rcode != RCODE_COMPLETE) {
126 		dev_err(&unit->device,
127 			"Failed to send a cue to load firmware\n");
128 		err = -EIO;
129 	}
130 end:
131 	return err;
132 }
133 
134 static inline int
135 get_meter(struct snd_bebob *bebob, void *buf, unsigned int size)
136 {
137 	return snd_fw_transaction(bebob->unit, TCODE_READ_BLOCK_REQUEST,
138 				  MAUDIO_SPECIFIC_ADDRESS + METER_OFFSET,
139 				  buf, size, 0);
140 }
141 
142 static int
143 check_clk_sync(struct snd_bebob *bebob, unsigned int size, bool *sync)
144 {
145 	int err;
146 	u8 *buf;
147 
148 	buf = kmalloc(size, GFP_KERNEL);
149 	if (buf == NULL)
150 		return -ENOMEM;
151 
152 	err = get_meter(bebob, buf, size);
153 	if (err < 0)
154 		goto end;
155 
156 	/* if synced, this value is the same as SFC of FDF in CIP header */
157 	*sync = (buf[size - 2] != 0xff);
158 end:
159 	kfree(buf);
160 	return err;
161 }
162 
163 /*
164  * dig_fmt: 0x00:S/PDIF, 0x01:ADAT
165  * clk_lock: 0x00:unlock, 0x01:lock
166  */
167 static int
168 avc_maudio_set_special_clk(struct snd_bebob *bebob, unsigned int clk_src,
169 			   unsigned int dig_in_fmt, unsigned int dig_out_fmt,
170 			   unsigned int clk_lock)
171 {
172 	struct special_params *params = bebob->maudio_special_quirk;
173 	int err;
174 	u8 *buf;
175 
176 	if (amdtp_stream_running(&bebob->rx_stream) ||
177 	    amdtp_stream_running(&bebob->tx_stream))
178 		return -EBUSY;
179 
180 	buf = kmalloc(12, GFP_KERNEL);
181 	if (buf == NULL)
182 		return -ENOMEM;
183 
184 	buf[0]  = 0x00;		/* CONTROL */
185 	buf[1]  = 0xff;		/* UNIT */
186 	buf[2]  = 0x00;		/* vendor dependent */
187 	buf[3]  = 0x04;		/* company ID high */
188 	buf[4]  = 0x00;		/* company ID middle */
189 	buf[5]  = 0x04;		/* company ID low */
190 	buf[6]  = 0xff & clk_src;	/* clock source */
191 	buf[7]  = 0xff & dig_in_fmt;	/* input digital format */
192 	buf[8]  = 0xff & dig_out_fmt;	/* output digital format */
193 	buf[9]  = 0xff & clk_lock;	/* lock these settings */
194 	buf[10] = 0x00;		/* padding  */
195 	buf[11] = 0x00;		/* padding */
196 
197 	err = fcp_avc_transaction(bebob->unit, buf, 12, buf, 12,
198 				  BIT(1) | BIT(2) | BIT(3) | BIT(4) |
199 				  BIT(5) | BIT(6) | BIT(7) | BIT(8) |
200 				  BIT(9));
201 	if ((err > 0) && (err < 10))
202 		err = -EIO;
203 	else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
204 		err = -ENOSYS;
205 	else if (buf[0] == 0x0a) /* REJECTED */
206 		err = -EINVAL;
207 	if (err < 0)
208 		goto end;
209 
210 	params->clk_src		= buf[6];
211 	params->dig_in_fmt	= buf[7];
212 	params->dig_out_fmt	= buf[8];
213 	params->clk_lock	= buf[9];
214 
215 	if (params->ctl_id_sync)
216 		snd_ctl_notify(bebob->card, SNDRV_CTL_EVENT_MASK_VALUE,
217 			       params->ctl_id_sync);
218 
219 	err = 0;
220 end:
221 	kfree(buf);
222 	return err;
223 }
224 static void
225 special_stream_formation_set(struct snd_bebob *bebob)
226 {
227 	static const unsigned int ch_table[2][2][3] = {
228 		/* AMDTP_OUT_STREAM */
229 		{ {  6,  6,  4 },	/* SPDIF */
230 		  { 12,  8,  4 } },	/* ADAT */
231 		/* AMDTP_IN_STREAM */
232 		{ { 10, 10,  2 },	/* SPDIF */
233 		  { 16, 12,  2 } }	/* ADAT */
234 	};
235 	struct special_params *params = bebob->maudio_special_quirk;
236 	unsigned int i, max;
237 
238 	max = SND_BEBOB_STRM_FMT_ENTRIES - 1;
239 	if (!params->is1814)
240 		max -= 2;
241 
242 	for (i = 0; i < max; i++) {
243 		bebob->tx_stream_formations[i + 1].pcm =
244 			ch_table[AMDTP_IN_STREAM][params->dig_in_fmt][i / 2];
245 		bebob->tx_stream_formations[i + 1].midi = 1;
246 
247 		bebob->rx_stream_formations[i + 1].pcm =
248 			ch_table[AMDTP_OUT_STREAM][params->dig_out_fmt][i / 2];
249 		bebob->rx_stream_formations[i + 1].midi = 1;
250 	}
251 }
252 
253 static int add_special_controls(struct snd_bebob *bebob);
254 int
255 snd_bebob_maudio_special_discover(struct snd_bebob *bebob, bool is1814)
256 {
257 	struct special_params *params;
258 	int err;
259 
260 	params = kzalloc(sizeof(struct special_params), GFP_KERNEL);
261 	if (params == NULL)
262 		return -ENOMEM;
263 
264 	mutex_lock(&bebob->mutex);
265 
266 	bebob->maudio_special_quirk = (void *)params;
267 	params->is1814 = is1814;
268 
269 	/* initialize these parameters because driver is not allowed to ask */
270 	bebob->rx_stream.context = ERR_PTR(-1);
271 	bebob->tx_stream.context = ERR_PTR(-1);
272 	err = avc_maudio_set_special_clk(bebob, 0x03, 0x00, 0x00, 0x00);
273 	if (err < 0) {
274 		dev_err(&bebob->unit->device,
275 			"fail to initialize clock params: %d\n", err);
276 		goto end;
277 	}
278 
279 	err = add_special_controls(bebob);
280 	if (err < 0)
281 		goto end;
282 
283 	special_stream_formation_set(bebob);
284 
285 	if (params->is1814) {
286 		bebob->midi_input_ports = 1;
287 		bebob->midi_output_ports = 1;
288 	} else {
289 		bebob->midi_input_ports = 2;
290 		bebob->midi_output_ports = 2;
291 	}
292 end:
293 	if (err < 0) {
294 		kfree(params);
295 		bebob->maudio_special_quirk = NULL;
296 	}
297 	mutex_unlock(&bebob->mutex);
298 	return err;
299 }
300 
301 /* Input plug shows actual rate. Output plug is needless for this purpose. */
302 static int special_get_rate(struct snd_bebob *bebob, unsigned int *rate)
303 {
304 	int err, trials;
305 
306 	trials = 0;
307 	do {
308 		err = avc_general_get_sig_fmt(bebob->unit, rate,
309 					      AVC_GENERAL_PLUG_DIR_IN, 0);
310 	} while (err == -EAGAIN && ++trials < 3);
311 
312 	return err;
313 }
314 static int special_set_rate(struct snd_bebob *bebob, unsigned int rate)
315 {
316 	struct special_params *params = bebob->maudio_special_quirk;
317 	int err;
318 
319 	err = avc_general_set_sig_fmt(bebob->unit, rate,
320 				      AVC_GENERAL_PLUG_DIR_OUT, 0);
321 	if (err < 0)
322 		goto end;
323 
324 	/*
325 	 * Just after changing sampling rate for output, a followed command
326 	 * for input is easy to fail. This is a workaround fot this issue.
327 	 */
328 	msleep(100);
329 
330 	err = avc_general_set_sig_fmt(bebob->unit, rate,
331 				      AVC_GENERAL_PLUG_DIR_IN, 0);
332 	if (err < 0)
333 		goto end;
334 
335 	if (params->ctl_id_sync)
336 		snd_ctl_notify(bebob->card, SNDRV_CTL_EVENT_MASK_VALUE,
337 			       params->ctl_id_sync);
338 end:
339 	return err;
340 }
341 
342 /* Clock source control for special firmware */
343 static const enum snd_bebob_clock_type special_clk_types[] = {
344 	SND_BEBOB_CLOCK_TYPE_INTERNAL,	/* With digital mute */
345 	SND_BEBOB_CLOCK_TYPE_EXTERNAL,	/* SPDIF/ADAT */
346 	SND_BEBOB_CLOCK_TYPE_EXTERNAL,	/* Word Clock */
347 	SND_BEBOB_CLOCK_TYPE_INTERNAL,
348 };
349 static int special_clk_get(struct snd_bebob *bebob, unsigned int *id)
350 {
351 	struct special_params *params = bebob->maudio_special_quirk;
352 	*id = params->clk_src;
353 	return 0;
354 }
355 static int special_clk_ctl_info(struct snd_kcontrol *kctl,
356 				struct snd_ctl_elem_info *einf)
357 {
358 	static const char *const special_clk_labels[] = {
359 		"Internal with Digital Mute",
360 		"Digital",
361 		"Word Clock",
362 		"Internal"
363 	};
364 	return snd_ctl_enum_info(einf, 1, ARRAY_SIZE(special_clk_types),
365 				 special_clk_labels);
366 }
367 static int special_clk_ctl_get(struct snd_kcontrol *kctl,
368 			       struct snd_ctl_elem_value *uval)
369 {
370 	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
371 	struct special_params *params = bebob->maudio_special_quirk;
372 	uval->value.enumerated.item[0] = params->clk_src;
373 	return 0;
374 }
375 static int special_clk_ctl_put(struct snd_kcontrol *kctl,
376 			       struct snd_ctl_elem_value *uval)
377 {
378 	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
379 	struct special_params *params = bebob->maudio_special_quirk;
380 	int err, id;
381 
382 	id = uval->value.enumerated.item[0];
383 	if (id >= ARRAY_SIZE(special_clk_types))
384 		return -EINVAL;
385 
386 	mutex_lock(&bebob->mutex);
387 
388 	err = avc_maudio_set_special_clk(bebob, id,
389 					 params->dig_in_fmt,
390 					 params->dig_out_fmt,
391 					 params->clk_lock);
392 	mutex_unlock(&bebob->mutex);
393 
394 	if (err >= 0)
395 		err = 1;
396 
397 	return err;
398 }
399 static const struct snd_kcontrol_new special_clk_ctl = {
400 	.name	= "Clock Source",
401 	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
402 	.access	= SNDRV_CTL_ELEM_ACCESS_READWRITE,
403 	.info	= special_clk_ctl_info,
404 	.get	= special_clk_ctl_get,
405 	.put	= special_clk_ctl_put
406 };
407 
408 /* Clock synchronization control for special firmware */
409 static int special_sync_ctl_info(struct snd_kcontrol *kctl,
410 				 struct snd_ctl_elem_info *einf)
411 {
412 	einf->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
413 	einf->count = 1;
414 	einf->value.integer.min = 0;
415 	einf->value.integer.max = 1;
416 
417 	return 0;
418 }
419 static int special_sync_ctl_get(struct snd_kcontrol *kctl,
420 				struct snd_ctl_elem_value *uval)
421 {
422 	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
423 	int err;
424 	bool synced = 0;
425 
426 	err = check_clk_sync(bebob, METER_SIZE_SPECIAL, &synced);
427 	if (err >= 0)
428 		uval->value.integer.value[0] = synced;
429 
430 	return 0;
431 }
432 static const struct snd_kcontrol_new special_sync_ctl = {
433 	.name	= "Sync Status",
434 	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
435 	.access	= SNDRV_CTL_ELEM_ACCESS_READ,
436 	.info	= special_sync_ctl_info,
437 	.get	= special_sync_ctl_get,
438 };
439 
440 /* Digital input interface control for special firmware */
441 static const char *const special_dig_in_iface_labels[] = {
442 	"S/PDIF Optical", "S/PDIF Coaxial", "ADAT Optical"
443 };
444 static int special_dig_in_iface_ctl_info(struct snd_kcontrol *kctl,
445 					 struct snd_ctl_elem_info *einf)
446 {
447 	return snd_ctl_enum_info(einf, 1,
448 				 ARRAY_SIZE(special_dig_in_iface_labels),
449 				 special_dig_in_iface_labels);
450 }
451 static int special_dig_in_iface_ctl_get(struct snd_kcontrol *kctl,
452 					struct snd_ctl_elem_value *uval)
453 {
454 	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
455 	struct special_params *params = bebob->maudio_special_quirk;
456 	unsigned int dig_in_iface;
457 	int err, val;
458 
459 	mutex_lock(&bebob->mutex);
460 
461 	err = avc_audio_get_selector(bebob->unit, 0x00, 0x04,
462 				     &dig_in_iface);
463 	if (err < 0) {
464 		dev_err(&bebob->unit->device,
465 			"fail to get digital input interface: %d\n", err);
466 		goto end;
467 	}
468 
469 	/* encoded id for user value */
470 	val = (params->dig_in_fmt << 1) | (dig_in_iface & 0x01);
471 
472 	/* for ADAT Optical */
473 	if (val > 2)
474 		val = 2;
475 
476 	uval->value.enumerated.item[0] = val;
477 end:
478 	mutex_unlock(&bebob->mutex);
479 	return err;
480 }
481 static int special_dig_in_iface_ctl_set(struct snd_kcontrol *kctl,
482 					struct snd_ctl_elem_value *uval)
483 {
484 	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
485 	struct special_params *params = bebob->maudio_special_quirk;
486 	unsigned int id, dig_in_fmt, dig_in_iface;
487 	int err;
488 
489 	id = uval->value.enumerated.item[0];
490 	if (id >= ARRAY_SIZE(special_dig_in_iface_labels))
491 		return -EINVAL;
492 
493 	/* decode user value */
494 	dig_in_fmt = (id >> 1) & 0x01;
495 	dig_in_iface = id & 0x01;
496 
497 	mutex_lock(&bebob->mutex);
498 
499 	err = avc_maudio_set_special_clk(bebob,
500 					 params->clk_src,
501 					 dig_in_fmt,
502 					 params->dig_out_fmt,
503 					 params->clk_lock);
504 	if (err < 0)
505 		goto end;
506 
507 	/* For ADAT, optical interface is only available. */
508 	if (params->dig_in_fmt > 0) {
509 		err = 1;
510 		goto end;
511 	}
512 
513 	/* For S/PDIF, optical/coaxial interfaces are selectable. */
514 	err = avc_audio_set_selector(bebob->unit, 0x00, 0x04, dig_in_iface);
515 	if (err < 0)
516 		dev_err(&bebob->unit->device,
517 			"fail to set digital input interface: %d\n", err);
518 	err = 1;
519 end:
520 	special_stream_formation_set(bebob);
521 	mutex_unlock(&bebob->mutex);
522 	return err;
523 }
524 static const struct snd_kcontrol_new special_dig_in_iface_ctl = {
525 	.name	= "Digital Input Interface",
526 	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
527 	.access	= SNDRV_CTL_ELEM_ACCESS_READWRITE,
528 	.info	= special_dig_in_iface_ctl_info,
529 	.get	= special_dig_in_iface_ctl_get,
530 	.put	= special_dig_in_iface_ctl_set
531 };
532 
533 /* Digital output interface control for special firmware */
534 static const char *const special_dig_out_iface_labels[] = {
535 	"S/PDIF Optical and Coaxial", "ADAT Optical"
536 };
537 static int special_dig_out_iface_ctl_info(struct snd_kcontrol *kctl,
538 					  struct snd_ctl_elem_info *einf)
539 {
540 	return snd_ctl_enum_info(einf, 1,
541 				 ARRAY_SIZE(special_dig_out_iface_labels),
542 				 special_dig_out_iface_labels);
543 }
544 static int special_dig_out_iface_ctl_get(struct snd_kcontrol *kctl,
545 					 struct snd_ctl_elem_value *uval)
546 {
547 	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
548 	struct special_params *params = bebob->maudio_special_quirk;
549 	mutex_lock(&bebob->mutex);
550 	uval->value.enumerated.item[0] = params->dig_out_fmt;
551 	mutex_unlock(&bebob->mutex);
552 	return 0;
553 }
554 static int special_dig_out_iface_ctl_set(struct snd_kcontrol *kctl,
555 					 struct snd_ctl_elem_value *uval)
556 {
557 	struct snd_bebob *bebob = snd_kcontrol_chip(kctl);
558 	struct special_params *params = bebob->maudio_special_quirk;
559 	unsigned int id;
560 	int err;
561 
562 	id = uval->value.enumerated.item[0];
563 	if (id >= ARRAY_SIZE(special_dig_out_iface_labels))
564 		return -EINVAL;
565 
566 	mutex_lock(&bebob->mutex);
567 
568 	err = avc_maudio_set_special_clk(bebob,
569 					 params->clk_src,
570 					 params->dig_in_fmt,
571 					 id, params->clk_lock);
572 	if (err >= 0) {
573 		special_stream_formation_set(bebob);
574 		err = 1;
575 	}
576 
577 	mutex_unlock(&bebob->mutex);
578 	return err;
579 }
580 static const struct snd_kcontrol_new special_dig_out_iface_ctl = {
581 	.name	= "Digital Output Interface",
582 	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
583 	.access	= SNDRV_CTL_ELEM_ACCESS_READWRITE,
584 	.info	= special_dig_out_iface_ctl_info,
585 	.get	= special_dig_out_iface_ctl_get,
586 	.put	= special_dig_out_iface_ctl_set
587 };
588 
589 static int add_special_controls(struct snd_bebob *bebob)
590 {
591 	struct snd_kcontrol *kctl;
592 	struct special_params *params = bebob->maudio_special_quirk;
593 	int err;
594 
595 	kctl = snd_ctl_new1(&special_clk_ctl, bebob);
596 	err = snd_ctl_add(bebob->card, kctl);
597 	if (err < 0)
598 		goto end;
599 
600 	kctl = snd_ctl_new1(&special_sync_ctl, bebob);
601 	err = snd_ctl_add(bebob->card, kctl);
602 	if (err < 0)
603 		goto end;
604 	params->ctl_id_sync = &kctl->id;
605 
606 	kctl = snd_ctl_new1(&special_dig_in_iface_ctl, bebob);
607 	err = snd_ctl_add(bebob->card, kctl);
608 	if (err < 0)
609 		goto end;
610 
611 	kctl = snd_ctl_new1(&special_dig_out_iface_ctl, bebob);
612 	err = snd_ctl_add(bebob->card, kctl);
613 end:
614 	return err;
615 }
616 
617 /* Hardware metering for special firmware */
618 static const char *const special_meter_labels[] = {
619 	ANA_IN, ANA_IN, ANA_IN, ANA_IN,
620 	SPDIF_IN,
621 	ADAT_IN, ADAT_IN, ADAT_IN, ADAT_IN,
622 	ANA_OUT, ANA_OUT,
623 	SPDIF_OUT,
624 	ADAT_OUT, ADAT_OUT, ADAT_OUT, ADAT_OUT,
625 	HP_OUT, HP_OUT,
626 	AUX_OUT
627 };
628 static int
629 special_meter_get(struct snd_bebob *bebob, u32 *target, unsigned int size)
630 {
631 	__be16 *buf;
632 	unsigned int i, c, channels;
633 	int err;
634 
635 	channels = ARRAY_SIZE(special_meter_labels) * 2;
636 	if (size < channels * sizeof(u32))
637 		return -EINVAL;
638 
639 	/* omit last 4 bytes because it's clock info. */
640 	buf = kmalloc(METER_SIZE_SPECIAL - 4, GFP_KERNEL);
641 	if (buf == NULL)
642 		return -ENOMEM;
643 
644 	err = get_meter(bebob, (void *)buf, METER_SIZE_SPECIAL - 4);
645 	if (err < 0)
646 		goto end;
647 
648 	/* Its format is u16 and some channels are unknown. */
649 	i = 0;
650 	for (c = 2; c < channels + 2; c++)
651 		target[i++] = be16_to_cpu(buf[c]) << 16;
652 end:
653 	kfree(buf);
654 	return err;
655 }
656 
657 /* last 4 bytes are omitted because it's clock info. */
658 static const char *const fw410_meter_labels[] = {
659 	ANA_IN, DIG_IN,
660 	ANA_OUT, ANA_OUT, ANA_OUT, ANA_OUT, DIG_OUT,
661 	HP_OUT
662 };
663 static const char *const audiophile_meter_labels[] = {
664 	ANA_IN, DIG_IN,
665 	ANA_OUT, ANA_OUT, DIG_OUT,
666 	HP_OUT, AUX_OUT,
667 };
668 static const char *const solo_meter_labels[] = {
669 	ANA_IN, DIG_IN,
670 	STRM_IN, STRM_IN,
671 	ANA_OUT, DIG_OUT
672 };
673 
674 /* no clock info */
675 static const char *const ozonic_meter_labels[] = {
676 	ANA_IN, ANA_IN,
677 	STRM_IN, STRM_IN,
678 	ANA_OUT, ANA_OUT
679 };
680 /* TODO: need testers. these positions are based on authour's assumption */
681 static const char *const nrv10_meter_labels[] = {
682 	ANA_IN, ANA_IN, ANA_IN, ANA_IN,
683 	DIG_IN,
684 	ANA_OUT, ANA_OUT, ANA_OUT, ANA_OUT,
685 	DIG_IN
686 };
687 static int
688 normal_meter_get(struct snd_bebob *bebob, u32 *buf, unsigned int size)
689 {
690 	const struct snd_bebob_meter_spec *spec = bebob->spec->meter;
691 	unsigned int c, channels;
692 	int err;
693 
694 	channels = spec->num * 2;
695 	if (size < channels * sizeof(u32))
696 		return -EINVAL;
697 
698 	err = get_meter(bebob, (void *)buf, size);
699 	if (err < 0)
700 		goto end;
701 
702 	for (c = 0; c < channels; c++)
703 		be32_to_cpus(&buf[c]);
704 
705 	/* swap stream channels because inverted */
706 	if (spec->labels == solo_meter_labels) {
707 		swap(buf[4], buf[6]);
708 		swap(buf[5], buf[7]);
709 	}
710 end:
711 	return err;
712 }
713 
714 /* for special customized devices */
715 static const struct snd_bebob_rate_spec special_rate_spec = {
716 	.get	= &special_get_rate,
717 	.set	= &special_set_rate,
718 };
719 static const struct snd_bebob_clock_spec special_clk_spec = {
720 	.num	= ARRAY_SIZE(special_clk_types),
721 	.types	= special_clk_types,
722 	.get	= &special_clk_get,
723 };
724 static const struct snd_bebob_meter_spec special_meter_spec = {
725 	.num	= ARRAY_SIZE(special_meter_labels),
726 	.labels	= special_meter_labels,
727 	.get	= &special_meter_get
728 };
729 const struct snd_bebob_spec maudio_special_spec = {
730 	.clock	= &special_clk_spec,
731 	.rate	= &special_rate_spec,
732 	.meter	= &special_meter_spec
733 };
734 
735 /* Firewire 410 specification */
736 static const struct snd_bebob_rate_spec usual_rate_spec = {
737 	.get	= &snd_bebob_stream_get_rate,
738 	.set	= &snd_bebob_stream_set_rate,
739 };
740 static const struct snd_bebob_meter_spec fw410_meter_spec = {
741 	.num	= ARRAY_SIZE(fw410_meter_labels),
742 	.labels	= fw410_meter_labels,
743 	.get	= &normal_meter_get
744 };
745 const struct snd_bebob_spec maudio_fw410_spec = {
746 	.clock	= NULL,
747 	.rate	= &usual_rate_spec,
748 	.meter	= &fw410_meter_spec
749 };
750 
751 /* Firewire Audiophile specification */
752 static const struct snd_bebob_meter_spec audiophile_meter_spec = {
753 	.num	= ARRAY_SIZE(audiophile_meter_labels),
754 	.labels	= audiophile_meter_labels,
755 	.get	= &normal_meter_get
756 };
757 const struct snd_bebob_spec maudio_audiophile_spec = {
758 	.clock	= NULL,
759 	.rate	= &usual_rate_spec,
760 	.meter	= &audiophile_meter_spec
761 };
762 
763 /* Firewire Solo specification */
764 static const struct snd_bebob_meter_spec solo_meter_spec = {
765 	.num	= ARRAY_SIZE(solo_meter_labels),
766 	.labels	= solo_meter_labels,
767 	.get	= &normal_meter_get
768 };
769 const struct snd_bebob_spec maudio_solo_spec = {
770 	.clock	= NULL,
771 	.rate	= &usual_rate_spec,
772 	.meter	= &solo_meter_spec
773 };
774 
775 /* Ozonic specification */
776 static const struct snd_bebob_meter_spec ozonic_meter_spec = {
777 	.num	= ARRAY_SIZE(ozonic_meter_labels),
778 	.labels	= ozonic_meter_labels,
779 	.get	= &normal_meter_get
780 };
781 const struct snd_bebob_spec maudio_ozonic_spec = {
782 	.clock	= NULL,
783 	.rate	= &usual_rate_spec,
784 	.meter	= &ozonic_meter_spec
785 };
786 
787 /* NRV10 specification */
788 static const struct snd_bebob_meter_spec nrv10_meter_spec = {
789 	.num	= ARRAY_SIZE(nrv10_meter_labels),
790 	.labels	= nrv10_meter_labels,
791 	.get	= &normal_meter_get
792 };
793 const struct snd_bebob_spec maudio_nrv10_spec = {
794 	.clock	= NULL,
795 	.rate	= &usual_rate_spec,
796 	.meter	= &nrv10_meter_spec
797 };
798