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ALSA: bebob: Add support for M-Audio special Firewire series
[deliverable/linux.git] / sound / firewire / bebob / bebob_stream.c
CommitLineData
eb7b3a05
TS		 1/*
2 * bebob_stream.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
11#define CALLBACK_TIMEOUT 1000
b6bc8123 12#define FW_ISO_RESOURCE_DELAY 1000
eb7b3a05
TS		 13
14/*
15 * NOTE;
16 * For BeBoB streams, Both of input and output CMP connection are important.
17 *
18 * For most devices, each CMP connection starts to transmit/receive a
19 * corresponding stream. But for a few devices, both of CMP connection needs
20 * to start transmitting stream. An example is 'M-Audio Firewire 410'.
21 */
22
23/* 128 is an arbitrary length but it seems to be enough */
24#define FORMAT_MAXIMUM_LENGTH 128
25
26const unsigned int snd_bebob_rate_table[SND_BEBOB_STRM_FMT_ENTRIES] = {
27 [0] = 32000,
28 [1] = 44100,
29 [2] = 48000,
30 [3] = 88200,
31 [4] = 96000,
32 [5] = 176400,
33 [6] = 192000,
34};
35
36/*
37 * See: Table 51: Extended Stream Format Info ‘Sampling Frequency’
38 * in Additional AVC commands (Nov 2003, BridgeCo)
39 */
40static const unsigned int bridgeco_freq_table[] = {
41 [0] = 0x02,
42 [1] = 0x03,
43 [2] = 0x04,
44 [3] = 0x0a,
45 [4] = 0x05,
46 [5] = 0x06,
47 [6] = 0x07,
48};
49
50static unsigned int
51get_formation_index(unsigned int rate)
52{
53 unsigned int i;
54
55 for (i = 0; i < ARRAY_SIZE(snd_bebob_rate_table); i++) {
56 if (snd_bebob_rate_table[i] == rate)
57 return i;
58 }
59 return -EINVAL;
60}
61
62int
63snd_bebob_stream_get_rate(struct snd_bebob *bebob, unsigned int *curr_rate)
64{
65 unsigned int tx_rate, rx_rate, trials;
66 int err;
67
68 trials = 0;
69 do {
70 err = avc_general_get_sig_fmt(bebob->unit, &tx_rate,
71 AVC_GENERAL_PLUG_DIR_OUT, 0);
72 } while (err == -EAGAIN && ++trials < 3);
73 if (err < 0)
74 goto end;
75
76 trials = 0;
77 do {
78 err = avc_general_get_sig_fmt(bebob->unit, &rx_rate,
79 AVC_GENERAL_PLUG_DIR_IN, 0);
80 } while (err == -EAGAIN && ++trials < 3);
81 if (err < 0)
82 goto end;
83
84 *curr_rate = rx_rate;
85 if (rx_rate == tx_rate)
86 goto end;
87
88 /* synchronize receive stream rate to transmit stream rate */
89 err = avc_general_set_sig_fmt(bebob->unit, rx_rate,
90 AVC_GENERAL_PLUG_DIR_IN, 0);
91end:
92 return err;
93}
94
95int
96snd_bebob_stream_set_rate(struct snd_bebob *bebob, unsigned int rate)
97{
98 int err;
99
100 err = avc_general_set_sig_fmt(bebob->unit, rate,
101 AVC_GENERAL_PLUG_DIR_OUT, 0);
102 if (err < 0)
103 goto end;
104
105 err = avc_general_set_sig_fmt(bebob->unit, rate,
106 AVC_GENERAL_PLUG_DIR_IN, 0);
107 if (err < 0)
108 goto end;
109
110 /*
111 * Some devices need a bit time for transition.
112 * 300msec is got by some experiments.
113 */
114 msleep(300);
115end:
116 return err;
117}
118
119int
120snd_bebob_stream_check_internal_clock(struct snd_bebob *bebob, bool *internal)
121{
1fc9522a 122 struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
eb7b3a05 123 u8 addr[AVC_BRIDGECO_ADDR_BYTES], input[7];
1fc9522a 124 unsigned int id;
eb7b3a05
TS		 125 int err = 0;
126
127 *internal = false;
128
1fc9522a
TS		 129 /* 1.The device has its own operation to switch source of clock */
130 if (clk_spec) {
131 err = clk_spec->get(bebob, &id);
132 if (err < 0)
133 dev_err(&bebob->unit->device,
134 "fail to get clock source: %d\n", err);
135 else if (strncmp(clk_spec->labels[id], SND_BEBOB_CLOCK_INTERNAL,
136 strlen(SND_BEBOB_CLOCK_INTERNAL)) == 0)
137 *internal = true;
138 goto end;
139 }
140
eb7b3a05 141 /*
1fc9522a 142 * 2.The device don't support to switch source of clock then assumed
eb7b3a05
TS		 143 * to use internal clock always
144 */
145 if (bebob->sync_input_plug < 0) {
146 *internal = true;
147 goto end;
148 }
149
150 /*
1fc9522a 151 * 3.The device supports to switch source of clock by an usual way.
eb7b3a05
TS		 152 * Let's check input for 'Music Sub Unit Sync Input' plug.
153 */
154 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
155 bebob->sync_input_plug);
156 err = avc_bridgeco_get_plug_input(bebob->unit, addr, input);
157 if (err < 0) {
158 dev_err(&bebob->unit->device,
159 "fail to get an input for MSU in plug %d: %d\n",
160 bebob->sync_input_plug, err);
161 goto end;
162 }
163
164 /*
165 * If there are no input plugs, all of fields are 0xff.
166 * Here check the first field. This field is used for direction.
167 */
168 if (input[0] == 0xff) {
169 *internal = true;
170 goto end;
171 }
172
173 /*
174 * If source of clock is internal CSR, Music Sub Unit Sync Input is
175 * a destination of Music Sub Unit Sync Output.
176 */
177 *internal = ((input[0] == AVC_BRIDGECO_PLUG_DIR_OUT) &&
178 (input[1] == AVC_BRIDGECO_PLUG_MODE_SUBUNIT) &&
179 (input[2] == 0x0c) &&
180 (input[3] == 0x00));
181end:
182 return err;
183}
184
185static unsigned int
186map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s)
187{
188 unsigned int sec, sections, ch, channels;
189 unsigned int pcm, midi, location;
190 unsigned int stm_pos, sec_loc, pos;
191 u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type;
192 enum avc_bridgeco_plug_dir dir;
193 int err;
194
195 /*
196 * The length of return value of this command cannot be expected. Here
197 * use the maximum length of FCP.
198 */
199 buf = kzalloc(256, GFP_KERNEL);
200 if (buf == NULL)
201 return -ENOMEM;
202
203 if (s == &bebob->tx_stream)
204 dir = AVC_BRIDGECO_PLUG_DIR_OUT;
205 else
206 dir = AVC_BRIDGECO_PLUG_DIR_IN;
207
208 avc_bridgeco_fill_unit_addr(addr, dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
209 err = avc_bridgeco_get_plug_ch_pos(bebob->unit, addr, buf, 256);
210 if (err < 0) {
211 dev_err(&bebob->unit->device,
212 "fail to get channel position for isoc %s plug 0: %d\n",
213 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out",
214 err);
215 goto end;
216 }
217 pos = 0;
218
219 /* positions in I/O buffer */
220 pcm = 0;
221 midi = 0;
222
223 /* the number of sections in AMDTP packet */
224 sections = buf[pos++];
225
226 for (sec = 0; sec < sections; sec++) {
227 /* type of this section */
228 avc_bridgeco_fill_unit_addr(addr, dir,
229 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
230 err = avc_bridgeco_get_plug_section_type(bebob->unit, addr,
231 sec, &type);
232 if (err < 0) {
233 dev_err(&bebob->unit->device,
234 "fail to get section type for isoc %s plug 0: %d\n",
235 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
236 "out",
237 err);
238 goto end;
239 }
240 /* NoType */
241 if (type == 0xff) {
242 err = -ENOSYS;
243 goto end;
244 }
245
246 /* the number of channels in this section */
247 channels = buf[pos++];
248
249 for (ch = 0; ch < channels; ch++) {
250 /* position of this channel in AMDTP packet */
251 stm_pos = buf[pos++] - 1;
252 /* location of this channel in this section */
253 sec_loc = buf[pos++] - 1;
254
9076c22d
TS		 255 /*
256 * Basically the number of location is within the
257 * number of channels in this section. But some models
258 * of M-Audio don't follow this. Its location for MIDI
259 * is the position of MIDI channels in AMDTP packet.
260 */
261 if (sec_loc >= channels)
262 sec_loc = ch;
263
eb7b3a05
TS		 264 switch (type) {
265 /* for MIDI conformant data channel */
266 case 0x0a:
267 /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */
268 if ((midi > 0) && (stm_pos != midi)) {
269 err = -ENOSYS;
270 goto end;
271 }
272 s->midi_position = stm_pos;
273 midi = stm_pos;
274 break;
275 /* for PCM data channel */
276 case 0x01: /* Headphone */
277 case 0x02: /* Microphone */
278 case 0x03: /* Line */
279 case 0x04: /* SPDIF */
280 case 0x05: /* ADAT */
281 case 0x06: /* TDIF */
282 case 0x07: /* MADI */
283 /* for undefined/changeable signal */
284 case 0x08: /* Analog */
285 case 0x09: /* Digital */
286 default:
287 location = pcm + sec_loc;
288 if (location >= AMDTP_MAX_CHANNELS_FOR_PCM) {
289 err = -ENOSYS;
290 goto end;
291 }
292 s->pcm_positions[location] = stm_pos;
293 break;
294 }
295 }
296
297 if (type != 0x0a)
298 pcm += channels;
299 else
300 midi += channels;
301 }
302end:
303 kfree(buf);
304 return err;
305}
306
307static int
308init_both_connections(struct snd_bebob *bebob)
309{
310 int err;
311
312 err = cmp_connection_init(&bebob->in_conn,
313 bebob->unit, CMP_INPUT, 0);
314 if (err < 0)
315 goto end;
316
317 err = cmp_connection_init(&bebob->out_conn,
318 bebob->unit, CMP_OUTPUT, 0);
319 if (err < 0)
320 cmp_connection_destroy(&bebob->in_conn);
321end:
322 return err;
323}
324
325static int
326check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s)
327{
328 struct cmp_connection *conn;
329 bool used;
330 int err;
331
332 if (s == &bebob->tx_stream)
333 conn = &bebob->out_conn;
334 else
335 conn = &bebob->in_conn;
336
337 err = cmp_connection_check_used(conn, &used);
338 if ((err >= 0) && used && !amdtp_stream_running(s)) {
339 dev_err(&bebob->unit->device,
340 "Connection established by others: %cPCR[%d]\n",
341 (conn->direction == CMP_OUTPUT) ? 'o' : 'i',
342 conn->pcr_index);
343 err = -EBUSY;
344 }
345
346 return err;
347}
348
349static int
350make_both_connections(struct snd_bebob *bebob, unsigned int rate)
351{
b6bc8123
TS		 352 int index, pcm_channels, midi_channels, err = 0;
353
354 if (bebob->connected)
355 goto end;
eb7b3a05
TS		 356
357 /* confirm params for both streams */
358 index = get_formation_index(rate);
359 pcm_channels = bebob->tx_stream_formations[index].pcm;
360 midi_channels = bebob->tx_stream_formations[index].midi;
361 amdtp_stream_set_parameters(&bebob->tx_stream,
362 rate, pcm_channels, midi_channels * 8);
363 pcm_channels = bebob->rx_stream_formations[index].pcm;
364 midi_channels = bebob->rx_stream_formations[index].midi;
365 amdtp_stream_set_parameters(&bebob->rx_stream,
366 rate, pcm_channels, midi_channels * 8);
367
368 /* establish connections for both streams */
369 err = cmp_connection_establish(&bebob->out_conn,
370 amdtp_stream_get_max_payload(&bebob->tx_stream));
371 if (err < 0)
372 goto end;
373 err = cmp_connection_establish(&bebob->in_conn,
374 amdtp_stream_get_max_payload(&bebob->rx_stream));
b6bc8123 375 if (err < 0) {
eb7b3a05 376 cmp_connection_break(&bebob->out_conn);
b6bc8123
TS		 377 goto end;
378 }
379
380 bebob->connected = true;
eb7b3a05
TS		 381end:
382 return err;
383}
384
385static void
386break_both_connections(struct snd_bebob *bebob)
387{
388 cmp_connection_break(&bebob->in_conn);
389 cmp_connection_break(&bebob->out_conn);
b6bc8123
TS		 390
391 bebob->connected = false;
3149ac48
TS		 392
393 /* These models seems to be in transition state for a longer time. */
394 if (bebob->maudio_special_quirk != NULL)
395 msleep(200);
eb7b3a05
TS		 396}
397
398static void
399destroy_both_connections(struct snd_bebob *bebob)
400{
401 break_both_connections(bebob);
402
403 cmp_connection_destroy(&bebob->in_conn);
404 cmp_connection_destroy(&bebob->out_conn);
405}
406
407static int
408get_sync_mode(struct snd_bebob *bebob, enum cip_flags *sync_mode)
409{
410 /* currently this module doesn't support SYT-Match mode */
411 *sync_mode = CIP_SYNC_TO_DEVICE;
412 return 0;
413}
414
415static int
416start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream,
417 unsigned int rate)
418{
419 struct cmp_connection *conn;
420 int err = 0;
421
422 if (stream == &bebob->rx_stream)
423 conn = &bebob->in_conn;
424 else
425 conn = &bebob->out_conn;
426
427 /* channel mapping */
3149ac48
TS		 428 if (bebob->maudio_special_quirk == NULL) {
429 err = map_data_channels(bebob, stream);
430 if (err < 0)
431 goto end;
432 }
eb7b3a05
TS		 433
434 /* start amdtp stream */
435 err = amdtp_stream_start(stream,
436 conn->resources.channel,
437 conn->speed);
438end:
439 return err;
440}
441
442int snd_bebob_stream_init_duplex(struct snd_bebob *bebob)
443{
444 int err;
445
446 err = init_both_connections(bebob);
447 if (err < 0)
448 goto end;
449
450 err = amdtp_stream_init(&bebob->tx_stream, bebob->unit,
451 AMDTP_IN_STREAM, CIP_BLOCKING);
452 if (err < 0) {
453 amdtp_stream_destroy(&bebob->tx_stream);
454 destroy_both_connections(bebob);
455 goto end;
456 }
b6bc8123
TS		 457 /* See comments in next function */
458 init_completion(&bebob->bus_reset);
459 bebob->tx_stream.flags |= CIP_SKIP_INIT_DBC_CHECK;
eb7b3a05
TS		 460
461 err = amdtp_stream_init(&bebob->rx_stream, bebob->unit,
462 AMDTP_OUT_STREAM, CIP_BLOCKING);
463 if (err < 0) {
464 amdtp_stream_destroy(&bebob->tx_stream);
465 amdtp_stream_destroy(&bebob->rx_stream);
466 destroy_both_connections(bebob);
467 }
468end:
469 return err;
470}
471
472int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, int rate)
473{
1fc9522a 474 struct snd_bebob_rate_spec *rate_spec = bebob->spec->rate;
eb7b3a05
TS		 475 struct amdtp_stream *master, *slave;
476 atomic_t *slave_substreams;
477 enum cip_flags sync_mode;
478 unsigned int curr_rate;
b6bc8123 479 bool updated = false;
eb7b3a05
TS		 480 int err = 0;
481
b6bc8123
TS		 482 /*
483 * Normal BeBoB firmware has a quirk at bus reset to transmits packets
484 * with discontinuous value in dbc field.
485 *
486 * This 'struct completion' is used to call .update() at first to update
487 * connections/streams. Next following codes handle streaming error.
488 */
489 if (amdtp_streaming_error(&bebob->tx_stream)) {
490 if (completion_done(&bebob->bus_reset))
491 reinit_completion(&bebob->bus_reset);
492
493 updated = (wait_for_completion_interruptible_timeout(
494 &bebob->bus_reset,
495 msecs_to_jiffies(FW_ISO_RESOURCE_DELAY)) > 0);
496 }
497
eb7b3a05
TS		 498 mutex_lock(&bebob->mutex);
499
500 /* Need no substreams */
501 if (atomic_read(&bebob->playback_substreams) == 0 &&
502 atomic_read(&bebob->capture_substreams) == 0)
503 goto end;
504
505 err = get_sync_mode(bebob, &sync_mode);
506 if (err < 0)
507 goto end;
508 if (sync_mode == CIP_SYNC_TO_DEVICE) {
509 master = &bebob->tx_stream;
510 slave = &bebob->rx_stream;
511 slave_substreams = &bebob->playback_substreams;
512 } else {
513 master = &bebob->rx_stream;
514 slave = &bebob->tx_stream;
515 slave_substreams = &bebob->capture_substreams;
516 }
517
518 /*
519 * Considering JACK/FFADO streaming:
520 * TODO: This can be removed hwdep functionality becomes popular.
521 */
522 err = check_connection_used_by_others(bebob, master);
523 if (err < 0)
524 goto end;
525
b6bc8123
TS		 526 /*
527 * packet queueing error or detecting discontinuity
528 *
529 * At bus reset, connections should not be broken here. So streams need
530 * to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag.
531 */
532 if (amdtp_streaming_error(master))
eb7b3a05 533 amdtp_stream_stop(master);
eb7b3a05
TS		 534 if (amdtp_streaming_error(slave))
535 amdtp_stream_stop(slave);
b6bc8123
TS		 536 if (!updated &&
537 !amdtp_stream_running(master) && !amdtp_stream_running(slave))
538 break_both_connections(bebob);
eb7b3a05
TS		 539
540 /* stop streams if rate is different */
1fc9522a 541 err = rate_spec->get(bebob, &curr_rate);
eb7b3a05
TS		 542 if (err < 0) {
543 dev_err(&bebob->unit->device,
544 "fail to get sampling rate: %d\n", err);
545 goto end;
546 }
547 if (rate == 0)
548 rate = curr_rate;
549 if (rate != curr_rate) {
550 amdtp_stream_stop(master);
551 amdtp_stream_stop(slave);
552 break_both_connections(bebob);
553 }
554
555 /* master should be always running */
556 if (!amdtp_stream_running(master)) {
557 amdtp_stream_set_sync(sync_mode, master, slave);
558 bebob->master = master;
559
560 /*
561 * NOTE:
562 * If establishing connections at first, Yamaha GO46
563 * (and maybe Terratec X24) don't generate sound.
3149ac48
TS		 564 *
565 * For firmware customized by M-Audio, refer to next NOTE.
eb7b3a05 566 */
3149ac48
TS		 567 if (bebob->maudio_special_quirk == NULL) {
568 err = rate_spec->set(bebob, rate);
569 if (err < 0) {
570 dev_err(&bebob->unit->device,
571 "fail to set sampling rate: %d\n",
572 err);
573 goto end;
574 }
eb7b3a05
TS		 575 }
576
577 err = make_both_connections(bebob, rate);
578 if (err < 0)
579 goto end;
580
581 err = start_stream(bebob, master, rate);
582 if (err < 0) {
583 dev_err(&bebob->unit->device,
584 "fail to run AMDTP master stream:%d\n", err);
585 break_both_connections(bebob);
586 goto end;
587 }
588
3149ac48
TS		 589 /*
590 * NOTE:
591 * The firmware customized by M-Audio uses these commands to
592 * start transmitting stream. This is not usual way.
593 */
594 if (bebob->maudio_special_quirk != NULL) {
595 err = rate_spec->set(bebob, rate);
596 if (err < 0) {
597 dev_err(&bebob->unit->device,
598 "fail to ensure sampling rate: %d\n",
599 err);
600 amdtp_stream_stop(master);
601 break_both_connections(bebob);
602 goto end;
603 }
604 }
605
eb7b3a05
TS		 606 /* wait first callback */
607 if (!amdtp_stream_wait_callback(master, CALLBACK_TIMEOUT)) {
608 amdtp_stream_stop(master);
609 break_both_connections(bebob);
610 err = -ETIMEDOUT;
611 goto end;
612 }
613 }
614
615 /* start slave if needed */
616 if (atomic_read(slave_substreams) > 0 && !amdtp_stream_running(slave)) {
617 err = start_stream(bebob, slave, rate);
618 if (err < 0) {
619 dev_err(&bebob->unit->device,
620 "fail to run AMDTP slave stream:%d\n", err);
621 amdtp_stream_stop(master);
622 break_both_connections(bebob);
623 goto end;
624 }
625
626 /* wait first callback */
627 if (!amdtp_stream_wait_callback(slave, CALLBACK_TIMEOUT)) {
628 amdtp_stream_stop(slave);
629 amdtp_stream_stop(master);
630 break_both_connections(bebob);
631 err = -ETIMEDOUT;
632 }
633 }
634end:
635 mutex_unlock(&bebob->mutex);
636 return err;
637}
638
639void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)
640{
641 struct amdtp_stream *master, *slave;
642 atomic_t *master_substreams, *slave_substreams;
643
644 mutex_lock(&bebob->mutex);
645
646 if (bebob->master == &bebob->rx_stream) {
647 slave = &bebob->tx_stream;
648 master = &bebob->rx_stream;
649 slave_substreams = &bebob->capture_substreams;
650 master_substreams = &bebob->playback_substreams;
651 } else {
652 slave = &bebob->rx_stream;
653 master = &bebob->tx_stream;
654 slave_substreams = &bebob->playback_substreams;
655 master_substreams = &bebob->capture_substreams;
656 }
657
658 if (atomic_read(slave_substreams) == 0) {
659 amdtp_stream_pcm_abort(slave);
660 amdtp_stream_stop(slave);
661
662 if (atomic_read(master_substreams) == 0) {
663 amdtp_stream_pcm_abort(master);
664 amdtp_stream_stop(master);
665 break_both_connections(bebob);
666 }
667 }
668
669 mutex_unlock(&bebob->mutex);
670}
671
672void snd_bebob_stream_update_duplex(struct snd_bebob *bebob)
673{
674 /* vs. XRUN recovery due to discontinuity at bus reset */
675 mutex_lock(&bebob->mutex);
676
677 if ((cmp_connection_update(&bebob->in_conn) < 0) ||
678 (cmp_connection_update(&bebob->out_conn) < 0)) {
679 amdtp_stream_pcm_abort(&bebob->rx_stream);
680 amdtp_stream_pcm_abort(&bebob->tx_stream);
681 amdtp_stream_stop(&bebob->rx_stream);
682 amdtp_stream_stop(&bebob->tx_stream);
683 break_both_connections(bebob);
684 } else {
685 amdtp_stream_update(&bebob->rx_stream);
686 amdtp_stream_update(&bebob->tx_stream);
687 }
688
b6bc8123
TS		 689 /* wake up stream_start_duplex() */
690 if (!completion_done(&bebob->bus_reset))
691 complete_all(&bebob->bus_reset);
692
eb7b3a05
TS		 693 mutex_unlock(&bebob->mutex);
694}
695
696void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob)
697{
698 mutex_lock(&bebob->mutex);
699
700 amdtp_stream_pcm_abort(&bebob->rx_stream);
701 amdtp_stream_pcm_abort(&bebob->tx_stream);
702
703 amdtp_stream_stop(&bebob->rx_stream);
704 amdtp_stream_stop(&bebob->tx_stream);
705
706 amdtp_stream_destroy(&bebob->rx_stream);
707 amdtp_stream_destroy(&bebob->tx_stream);
708
709 destroy_both_connections(bebob);
710
711 mutex_unlock(&bebob->mutex);
712}
713
714/*
715 * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’
716 * in Additional AVC commands (Nov 2003, BridgeCo)
717 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005
718 */
719static int
720parse_stream_formation(u8 *buf, unsigned int len,
721 struct snd_bebob_stream_formation *formation)
722{
723 unsigned int i, e, channels, format;
724
725 /*
726 * this module can support a hierarchy combination that:
727 * Root: Audio and Music (0x90)
728 * Level 1: AM824 Compound (0x40)
729 */
730 if ((buf[0] != 0x90) || (buf[1] != 0x40))
731 return -ENOSYS;
732
733 /* check sampling rate */
734 for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) {
735 if (buf[2] == bridgeco_freq_table[i])
736 break;
737 }
738 if (i == sizeof(bridgeco_freq_table))
739 return -ENOSYS;
740
741 /* Avoid double count by different entries for the same rate. */
742 memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation));
743
744 for (e = 0; e < buf[4]; e++) {
745 channels = buf[5 + e * 2];
746 format = buf[6 + e * 2];
747
748 switch (format) {
749 /* IEC 60958-3, currently handle as MBLA */
750 case 0x00:
751 /* Multi bit linear audio */
752 case 0x06: /* Raw */
753 formation[i].pcm += channels;
754 break;
755 /* MIDI Conformant */
756 case 0x0d:
757 formation[i].midi += channels;
758 break;
759 /* IEC 61937-3 to 7 */
760 case 0x01:
761 case 0x02:
762 case 0x03:
763 case 0x04:
764 case 0x05:
765 /* Multi bit linear audio */
766 case 0x07: /* DVD-Audio */
767 case 0x0c: /* High Precision */
768 /* One Bit Audio */
769 case 0x08: /* (Plain) Raw */
770 case 0x09: /* (Plain) SACD */
771 case 0x0a: /* (Encoded) Raw */
772 case 0x0b: /* (Encoded) SACD */
773 /* Synchronization Stream (Stereo Raw audio) */
774 case 0x40:
775 /* Don't care */
776 case 0xff:
777 default:
778 return -ENOSYS; /* not supported */
779 }
780 }
781
782 if (formation[i].pcm > AMDTP_MAX_CHANNELS_FOR_PCM ||
783 formation[i].midi > AMDTP_MAX_CHANNELS_FOR_MIDI)
784 return -ENOSYS;
785
786 return 0;
787}
788
789static int
790fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir,
791 unsigned short pid)
792{
793 u8 *buf;
794 struct snd_bebob_stream_formation *formations;
795 unsigned int len, eid;
796 u8 addr[AVC_BRIDGECO_ADDR_BYTES];
797 int err;
798
799 buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL);
800 if (buf == NULL)
801 return -ENOMEM;
802
803 if (dir == AVC_BRIDGECO_PLUG_DIR_IN)
804 formations = bebob->rx_stream_formations;
805 else
806 formations = bebob->tx_stream_formations;
807
808 for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) {
809 len = FORMAT_MAXIMUM_LENGTH;
810 avc_bridgeco_fill_unit_addr(addr, dir,
811 AVC_BRIDGECO_PLUG_UNIT_ISOC, pid);
812 err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf,
813 &len, eid);
814 /* No entries remained. */
815 if (err == -EINVAL && eid > 0) {
816 err = 0;
817 break;
818 } else if (err < 0) {
819 dev_err(&bebob->unit->device,
820 "fail to get stream format %d for isoc %s plug %d:%d\n",
821 eid,
822 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
823 "out",
824 pid, err);
825 break;
826 }
827
828 err = parse_stream_formation(buf, len, formations);
829 if (err < 0)
830 break;
831 }
832
833 kfree(buf);
834 return err;
835}
836
837static int
838seek_msu_sync_input_plug(struct snd_bebob *bebob)
839{
840 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
841 unsigned int i, type;
842 int err;
843
844 /* Get the number of Music Sub Unit for both direction. */
845 err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs);
846 if (err < 0) {
847 dev_err(&bebob->unit->device,
848 "fail to get info for MSU in/out plugs: %d\n",
849 err);
850 goto end;
851 }
852
853 /* seek destination plugs for 'MSU sync input' */
854 bebob->sync_input_plug = -1;
855 for (i = 0; i < plugs[0]; i++) {
856 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i);
857 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
858 if (err < 0) {
859 dev_err(&bebob->unit->device,
860 "fail to get type for MSU in plug %d: %d\n",
861 i, err);
862 goto end;
863 }
864
865 if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) {
866 bebob->sync_input_plug = i;
867 break;
868 }
869 }
870end:
871 return err;
872}
873
874int snd_bebob_stream_discover(struct snd_bebob *bebob)
875{
1fc9522a 876 struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
eb7b3a05
TS		 877 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
878 enum avc_bridgeco_plug_type type;
879 unsigned int i;
880 int err;
881
882 /* the number of plugs for isoc in/out, ext in/out */
883 err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs);
884 if (err < 0) {
885 dev_err(&bebob->unit->device,
886 "fail to get info for isoc/external in/out plugs: %d\n",
887 err);
888 goto end;
889 }
890
891 /*
892 * This module supports at least one isoc input plug and one isoc
893 * output plug.
894 */
895 if ((plugs[0] == 0) || (plugs[1] == 0)) {
896 err = -ENOSYS;
897 goto end;
898 }
899
900 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
901 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
902 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
903 if (err < 0) {
904 dev_err(&bebob->unit->device,
905 "fail to get type for isoc in plug 0: %d\n", err);
906 goto end;
907 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
908 err = -ENOSYS;
909 goto end;
910 }
911 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0);
912 if (err < 0)
913 goto end;
914
915 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
916 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
917 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
918 if (err < 0) {
919 dev_err(&bebob->unit->device,
920 "fail to get type for isoc out plug 0: %d\n", err);
921 goto end;
922 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
923 err = -ENOSYS;
924 goto end;
925 }
926 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0);
927 if (err < 0)
928 goto end;
929
930 /* count external input plugs for MIDI */
931 bebob->midi_input_ports = 0;
932 for (i = 0; i < plugs[2]; i++) {
933 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
934 AVC_BRIDGECO_PLUG_UNIT_EXT, i);
935 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
936 if (err < 0) {
937 dev_err(&bebob->unit->device,
938 "fail to get type for external in plug %d: %d\n",
939 i, err);
940 goto end;
941 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
942 bebob->midi_input_ports++;
943 }
944 }
945
946 /* count external output plugs for MIDI */
947 bebob->midi_output_ports = 0;
948 for (i = 0; i < plugs[3]; i++) {
949 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
950 AVC_BRIDGECO_PLUG_UNIT_EXT, i);
951 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
952 if (err < 0) {
953 dev_err(&bebob->unit->device,
954 "fail to get type for external out plug %d: %d\n",
955 i, err);
956 goto end;
957 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
958 bebob->midi_output_ports++;
959 }
960 }
961
962 /* for check source of clock later */
1fc9522a
TS		 963 if (!clk_spec)
964 err = seek_msu_sync_input_plug(bebob);
eb7b3a05
TS		 965end:
966 return err;
967}
618eabea
TS		 968
969void snd_bebob_stream_lock_changed(struct snd_bebob *bebob)
970{
971 bebob->dev_lock_changed = true;
972 wake_up(&bebob->hwdep_wait);
973}
974
975int snd_bebob_stream_lock_try(struct snd_bebob *bebob)
976{
977 int err;
978
979 spin_lock_irq(&bebob->lock);
980
981 /* user land lock this */
982 if (bebob->dev_lock_count < 0) {
983 err = -EBUSY;
984 goto end;
985 }
986
987 /* this is the first time */
988 if (bebob->dev_lock_count++ == 0)
989 snd_bebob_stream_lock_changed(bebob);
990 err = 0;
991end:
992 spin_unlock_irq(&bebob->lock);
993 return err;
994}
995
996void snd_bebob_stream_lock_release(struct snd_bebob *bebob)
997{
998 spin_lock_irq(&bebob->lock);
999
1000 if (WARN_ON(bebob->dev_lock_count <= 0))
1001 goto end;
1002 if (--bebob->dev_lock_count == 0)
1003 snd_bebob_stream_lock_changed(bebob);
1004end:
1005 spin_unlock_irq(&bebob->lock);
1006}
Linux kernel - Deliverables
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