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Linux 4.18.10
[linux/fpc-iii.git] / sound / firewire / bebob / bebob_stream.c
blob4d3034a68bdfbd587163566484eea57804260eb7
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 2000
12 #define FW_ISO_RESOURCE_DELAY 1000
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
26 const 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 */
40 static 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
50 static int
51 get_formation_index(unsigned int rate, unsigned int *index)
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 *index = i;
58 return 0;
59 }
60 }
61 return -EINVAL;
62 }
63
64 int
65 snd_bebob_stream_get_rate(struct snd_bebob *bebob, unsigned int *curr_rate)
66 {
67 unsigned int tx_rate, rx_rate, trials;
68 int err;
69
70 trials = 0;
71 do {
72 err = avc_general_get_sig_fmt(bebob->unit, &tx_rate,
73 AVC_GENERAL_PLUG_DIR_OUT, 0);
74 } while (err == -EAGAIN && ++trials < 3);
75 if (err < 0)
76 goto end;
77
78 trials = 0;
79 do {
80 err = avc_general_get_sig_fmt(bebob->unit, &rx_rate,
81 AVC_GENERAL_PLUG_DIR_IN, 0);
82 } while (err == -EAGAIN && ++trials < 3);
83 if (err < 0)
84 goto end;
85
86 *curr_rate = rx_rate;
87 if (rx_rate == tx_rate)
88 goto end;
89
90 /* synchronize receive stream rate to transmit stream rate */
91 err = avc_general_set_sig_fmt(bebob->unit, rx_rate,
92 AVC_GENERAL_PLUG_DIR_IN, 0);
93 end:
94 return err;
95 }
96
97 int
98 snd_bebob_stream_set_rate(struct snd_bebob *bebob, unsigned int rate)
99 {
100 int err;
101
102 err = avc_general_set_sig_fmt(bebob->unit, rate,
103 AVC_GENERAL_PLUG_DIR_OUT, 0);
104 if (err < 0)
105 goto end;
106
107 err = avc_general_set_sig_fmt(bebob->unit, rate,
108 AVC_GENERAL_PLUG_DIR_IN, 0);
109 if (err < 0)
110 goto end;
111
112 /*
113 * Some devices need a bit time for transition.
114 * 300msec is got by some experiments.
115 */
116 msleep(300);
117 end:
118 return err;
119 }
120
121 int snd_bebob_stream_get_clock_src(struct snd_bebob *bebob,
122 enum snd_bebob_clock_type *src)
123 {
124 const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
125 u8 addr[AVC_BRIDGECO_ADDR_BYTES], input[7];
126 unsigned int id;
127 enum avc_bridgeco_plug_type type;
128 int err = 0;
129
130 /* 1.The device has its own operation to switch source of clock */
131 if (clk_spec) {
132 err = clk_spec->get(bebob, &id);
133 if (err < 0) {
134 dev_err(&bebob->unit->device,
135 "fail to get clock source: %d\n", err);
136 goto end;
137 }
138
139 if (id >= clk_spec->num) {
140 dev_err(&bebob->unit->device,
141 "clock source %d out of range 0..%d\n",
142 id, clk_spec->num - 1);
143 err = -EIO;
144 goto end;
145 }
146
147 *src = clk_spec->types[id];
148 goto end;
149 }
150
151 /*
152 * 2.The device don't support to switch source of clock then assumed
153 * to use internal clock always
154 */
155 if (bebob->sync_input_plug < 0) {
156 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
157 goto end;
158 }
159
160 /*
161 * 3.The device supports to switch source of clock by an usual way.
162 * Let's check input for 'Music Sub Unit Sync Input' plug.
163 */
164 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
165 bebob->sync_input_plug);
166 err = avc_bridgeco_get_plug_input(bebob->unit, addr, input);
167 if (err < 0) {
168 dev_err(&bebob->unit->device,
169 "fail to get an input for MSU in plug %d: %d\n",
170 bebob->sync_input_plug, err);
171 goto end;
172 }
173
174 /*
175 * If there are no input plugs, all of fields are 0xff.
176 * Here check the first field. This field is used for direction.
177 */
178 if (input[0] == 0xff) {
179 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
180 goto end;
181 }
182
183 /* The source from any output plugs is for one purpose only. */
184 if (input[0] == AVC_BRIDGECO_PLUG_DIR_OUT) {
185 /*
186 * In BeBoB architecture, the source from music subunit may
187 * bypass from oPCR[0]. This means that this source gives
188 * synchronization to IEEE 1394 cycle start packet.
189 */
190 if (input[1] == AVC_BRIDGECO_PLUG_MODE_SUBUNIT &&
191 input[2] == 0x0c) {
192 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
193 goto end;
194 }
195 /* The source from any input units is for several purposes. */
196 } else if (input[1] == AVC_BRIDGECO_PLUG_MODE_UNIT) {
197 if (input[2] == AVC_BRIDGECO_PLUG_UNIT_ISOC) {
198 if (input[3] == 0x00) {
199 /*
200 * This source comes from iPCR[0]. This means
201 * that presentation timestamp calculated by
202 * SYT series of the received packets. In
203 * short, this driver is the master of
204 * synchronization.
205 */
206 *src = SND_BEBOB_CLOCK_TYPE_SYT;
207 goto end;
208 } else {
209 /*
210 * This source comes from iPCR[1-29]. This
211 * means that the synchronization stream is not
212 * the Audio/MIDI compound stream.
213 */
214 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL;
215 goto end;
216 }
217 } else if (input[2] == AVC_BRIDGECO_PLUG_UNIT_EXT) {
218 /* Check type of this plug. */
219 avc_bridgeco_fill_unit_addr(addr,
220 AVC_BRIDGECO_PLUG_DIR_IN,
221 AVC_BRIDGECO_PLUG_UNIT_EXT,
222 input[3]);
223 err = avc_bridgeco_get_plug_type(bebob->unit, addr,
224 &type);
225 if (err < 0)
226 goto end;
227
228 if (type == AVC_BRIDGECO_PLUG_TYPE_DIG) {
229 /*
230 * SPDIF/ADAT or sometimes (not always) word
231 * clock.
232 */
233 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL;
234 goto end;
235 } else if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) {
236 /* Often word clock. */
237 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL;
238 goto end;
239 } else if (type == AVC_BRIDGECO_PLUG_TYPE_ADDITION) {
240 /*
241 * Not standard.
242 * Mostly, additional internal clock.
243 */
244 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
245 goto end;
246 }
247 }
248 }
249
250 /* Not supported. */
251 err = -EIO;
252 end:
253 return err;
254 }
255
256 static unsigned int
257 map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s)
258 {
259 unsigned int sec, sections, ch, channels;
260 unsigned int pcm, midi, location;
261 unsigned int stm_pos, sec_loc, pos;
262 u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type;
263 enum avc_bridgeco_plug_dir dir;
264 int err;
265
266 /*
267 * The length of return value of this command cannot be expected. Here
268 * use the maximum length of FCP.
269 */
270 buf = kzalloc(256, GFP_KERNEL);
271 if (buf == NULL)
272 return -ENOMEM;
273
274 if (s == &bebob->tx_stream)
275 dir = AVC_BRIDGECO_PLUG_DIR_OUT;
276 else
277 dir = AVC_BRIDGECO_PLUG_DIR_IN;
278
279 avc_bridgeco_fill_unit_addr(addr, dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
280 err = avc_bridgeco_get_plug_ch_pos(bebob->unit, addr, buf, 256);
281 if (err < 0) {
282 dev_err(&bebob->unit->device,
283 "fail to get channel position for isoc %s plug 0: %d\n",
284 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out",
285 err);
286 goto end;
287 }
288 pos = 0;
289
290 /* positions in I/O buffer */
291 pcm = 0;
292 midi = 0;
293
294 /* the number of sections in AMDTP packet */
295 sections = buf[pos++];
296
297 for (sec = 0; sec < sections; sec++) {
298 /* type of this section */
299 avc_bridgeco_fill_unit_addr(addr, dir,
300 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
301 err = avc_bridgeco_get_plug_section_type(bebob->unit, addr,
302 sec, &type);
303 if (err < 0) {
304 dev_err(&bebob->unit->device,
305 "fail to get section type for isoc %s plug 0: %d\n",
306 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
307 "out",
308 err);
309 goto end;
310 }
311 /* NoType */
312 if (type == 0xff) {
313 err = -ENOSYS;
314 goto end;
315 }
316
317 /* the number of channels in this section */
318 channels = buf[pos++];
319
320 for (ch = 0; ch < channels; ch++) {
321 /* position of this channel in AMDTP packet */
322 stm_pos = buf[pos++] - 1;
323 /* location of this channel in this section */
324 sec_loc = buf[pos++] - 1;
325
326 /*
327 * Basically the number of location is within the
328 * number of channels in this section. But some models
329 * of M-Audio don't follow this. Its location for MIDI
330 * is the position of MIDI channels in AMDTP packet.
331 */
332 if (sec_loc >= channels)
333 sec_loc = ch;
334
335 switch (type) {
336 /* for MIDI conformant data channel */
337 case 0x0a:
338 /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */
339 if ((midi > 0) && (stm_pos != midi)) {
340 err = -ENOSYS;
341 goto end;
342 }
343 amdtp_am824_set_midi_position(s, stm_pos);
344 midi = stm_pos;
345 break;
346 /* for PCM data channel */
347 case 0x01: /* Headphone */
348 case 0x02: /* Microphone */
349 case 0x03: /* Line */
350 case 0x04: /* SPDIF */
351 case 0x05: /* ADAT */
352 case 0x06: /* TDIF */
353 case 0x07: /* MADI */
354 /* for undefined/changeable signal */
355 case 0x08: /* Analog */
356 case 0x09: /* Digital */
357 default:
358 location = pcm + sec_loc;
359 if (location >= AM824_MAX_CHANNELS_FOR_PCM) {
360 err = -ENOSYS;
361 goto end;
362 }
363 amdtp_am824_set_pcm_position(s, location,
364 stm_pos);
365 break;
366 }
367 }
368
369 if (type != 0x0a)
370 pcm += channels;
371 else
372 midi += channels;
373 }
374 end:
375 kfree(buf);
376 return err;
377 }
378
379 static int
380 init_both_connections(struct snd_bebob *bebob)
381 {
382 int err;
383
384 err = cmp_connection_init(&bebob->in_conn,
385 bebob->unit, CMP_INPUT, 0);
386 if (err < 0)
387 goto end;
388
389 err = cmp_connection_init(&bebob->out_conn,
390 bebob->unit, CMP_OUTPUT, 0);
391 if (err < 0)
392 cmp_connection_destroy(&bebob->in_conn);
393 end:
394 return err;
395 }
396
397 static int
398 check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s)
399 {
400 struct cmp_connection *conn;
401 bool used;
402 int err;
403
404 if (s == &bebob->tx_stream)
405 conn = &bebob->out_conn;
406 else
407 conn = &bebob->in_conn;
408
409 err = cmp_connection_check_used(conn, &used);
410 if ((err >= 0) && used && !amdtp_stream_running(s)) {
411 dev_err(&bebob->unit->device,
412 "Connection established by others: %cPCR[%d]\n",
413 (conn->direction == CMP_OUTPUT) ? 'o' : 'i',
414 conn->pcr_index);
415 err = -EBUSY;
416 }
417
418 return err;
419 }
420
421 static int
422 make_both_connections(struct snd_bebob *bebob, unsigned int rate)
423 {
424 int index, pcm_channels, midi_channels, err = 0;
425
426 if (bebob->connected)
427 goto end;
428
429 /* confirm params for both streams */
430 err = get_formation_index(rate, &index);
431 if (err < 0)
432 goto end;
433 pcm_channels = bebob->tx_stream_formations[index].pcm;
434 midi_channels = bebob->tx_stream_formations[index].midi;
435 err = amdtp_am824_set_parameters(&bebob->tx_stream, rate,
436 pcm_channels, midi_channels * 8,
437 false);
438 if (err < 0)
439 goto end;
440
441 pcm_channels = bebob->rx_stream_formations[index].pcm;
442 midi_channels = bebob->rx_stream_formations[index].midi;
443 err = amdtp_am824_set_parameters(&bebob->rx_stream, rate,
444 pcm_channels, midi_channels * 8,
445 false);
446 if (err < 0)
447 goto end;
448
449 /* establish connections for both streams */
450 err = cmp_connection_establish(&bebob->out_conn,
451 amdtp_stream_get_max_payload(&bebob->tx_stream));
452 if (err < 0)
453 goto end;
454 err = cmp_connection_establish(&bebob->in_conn,
455 amdtp_stream_get_max_payload(&bebob->rx_stream));
456 if (err < 0) {
457 cmp_connection_break(&bebob->out_conn);
458 goto end;
459 }
460
461 bebob->connected = true;
462 end:
463 return err;
464 }
465
466 static void
467 break_both_connections(struct snd_bebob *bebob)
468 {
469 cmp_connection_break(&bebob->in_conn);
470 cmp_connection_break(&bebob->out_conn);
471
472 bebob->connected = false;
473
474 /* These models seems to be in transition state for a longer time. */
475 if (bebob->maudio_special_quirk != NULL)
476 msleep(200);
477 }
478
479 static void
480 destroy_both_connections(struct snd_bebob *bebob)
481 {
482 cmp_connection_destroy(&bebob->in_conn);
483 cmp_connection_destroy(&bebob->out_conn);
484 }
485
486 static int
487 start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream,
488 unsigned int rate)
489 {
490 struct cmp_connection *conn;
491 int err = 0;
492
493 if (stream == &bebob->rx_stream)
494 conn = &bebob->in_conn;
495 else
496 conn = &bebob->out_conn;
497
498 /* channel mapping */
499 if (bebob->maudio_special_quirk == NULL) {
500 err = map_data_channels(bebob, stream);
501 if (err < 0)
502 goto end;
503 }
504
505 /* start amdtp stream */
506 err = amdtp_stream_start(stream,
507 conn->resources.channel,
508 conn->speed);
509 end:
510 return err;
511 }
512
513 int snd_bebob_stream_init_duplex(struct snd_bebob *bebob)
514 {
515 int err;
516
517 err = init_both_connections(bebob);
518 if (err < 0)
519 goto end;
520
521 err = amdtp_am824_init(&bebob->tx_stream, bebob->unit,
522 AMDTP_IN_STREAM, CIP_BLOCKING);
523 if (err < 0) {
524 amdtp_stream_destroy(&bebob->tx_stream);
525 destroy_both_connections(bebob);
526 goto end;
527 }
528
529 /*
530 * BeBoB v3 transfers packets with these qurks:
531 * - In the beginning of streaming, the value of dbc is incremented
532 * even if no data blocks are transferred.
533 * - The value of dbc is reset suddenly.
534 */
535 if (bebob->version > 2)
536 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC |
537 CIP_SKIP_DBC_ZERO_CHECK;
538
539 /*
540 * At high sampling rate, M-Audio special firmware transmits empty
541 * packet with the value of dbc incremented by 8 but the others are
542 * valid to IEC 61883-1.
543 */
544 if (bebob->maudio_special_quirk)
545 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC;
546
547 err = amdtp_am824_init(&bebob->rx_stream, bebob->unit,
548 AMDTP_OUT_STREAM, CIP_BLOCKING);
549 if (err < 0) {
550 amdtp_stream_destroy(&bebob->tx_stream);
551 amdtp_stream_destroy(&bebob->rx_stream);
552 destroy_both_connections(bebob);
553 }
554 end:
555 return err;
556 }
557
558 int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate)
559 {
560 const struct snd_bebob_rate_spec *rate_spec = bebob->spec->rate;
561 unsigned int curr_rate;
562 int err = 0;
563
564 /* Need no substreams */
565 if (bebob->substreams_counter == 0)
566 goto end;
567
568 /*
569 * Considering JACK/FFADO streaming:
570 * TODO: This can be removed hwdep functionality becomes popular.
571 */
572 err = check_connection_used_by_others(bebob, &bebob->rx_stream);
573 if (err < 0)
574 goto end;
575
576 /*
577 * packet queueing error or detecting discontinuity
578 *
579 * At bus reset, connections should not be broken here. So streams need
580 * to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag.
581 */
582 if (amdtp_streaming_error(&bebob->rx_stream))
583 amdtp_stream_stop(&bebob->rx_stream);
584 if (amdtp_streaming_error(&bebob->tx_stream))
585 amdtp_stream_stop(&bebob->tx_stream);
586 if (!amdtp_stream_running(&bebob->rx_stream) &&
587 !amdtp_stream_running(&bebob->tx_stream))
588 break_both_connections(bebob);
589
590 /* stop streams if rate is different */
591 err = rate_spec->get(bebob, &curr_rate);
592 if (err < 0) {
593 dev_err(&bebob->unit->device,
594 "fail to get sampling rate: %d\n", err);
595 goto end;
596 }
597 if (rate == 0)
598 rate = curr_rate;
599 if (rate != curr_rate) {
600 amdtp_stream_stop(&bebob->rx_stream);
601 amdtp_stream_stop(&bebob->tx_stream);
602 break_both_connections(bebob);
603 }
604
605 /* master should be always running */
606 if (!amdtp_stream_running(&bebob->rx_stream)) {
607 /*
608 * NOTE:
609 * If establishing connections at first, Yamaha GO46
610 * (and maybe Terratec X24) don't generate sound.
611 *
612 * For firmware customized by M-Audio, refer to next NOTE.
613 */
614 if (bebob->maudio_special_quirk == NULL) {
615 err = rate_spec->set(bebob, rate);
616 if (err < 0) {
617 dev_err(&bebob->unit->device,
618 "fail to set sampling rate: %d\n",
619 err);
620 goto end;
621 }
622 }
623
624 err = make_both_connections(bebob, rate);
625 if (err < 0)
626 goto end;
627
628 err = start_stream(bebob, &bebob->rx_stream, rate);
629 if (err < 0) {
630 dev_err(&bebob->unit->device,
631 "fail to run AMDTP master stream:%d\n", err);
632 break_both_connections(bebob);
633 goto end;
634 }
635
636 /*
637 * NOTE:
638 * The firmware customized by M-Audio uses these commands to
639 * start transmitting stream. This is not usual way.
640 */
641 if (bebob->maudio_special_quirk != NULL) {
642 err = rate_spec->set(bebob, rate);
643 if (err < 0) {
644 dev_err(&bebob->unit->device,
645 "fail to ensure sampling rate: %d\n",
646 err);
647 amdtp_stream_stop(&bebob->rx_stream);
648 break_both_connections(bebob);
649 goto end;
650 }
651 }
652
653 /* wait first callback */
654 if (!amdtp_stream_wait_callback(&bebob->rx_stream,
655 CALLBACK_TIMEOUT)) {
656 amdtp_stream_stop(&bebob->rx_stream);
657 break_both_connections(bebob);
658 err = -ETIMEDOUT;
659 goto end;
660 }
661 }
662
663 /* start slave if needed */
664 if (!amdtp_stream_running(&bebob->tx_stream)) {
665 err = start_stream(bebob, &bebob->tx_stream, rate);
666 if (err < 0) {
667 dev_err(&bebob->unit->device,
668 "fail to run AMDTP slave stream:%d\n", err);
669 amdtp_stream_stop(&bebob->rx_stream);
670 break_both_connections(bebob);
671 goto end;
672 }
673
674 /* wait first callback */
675 if (!amdtp_stream_wait_callback(&bebob->tx_stream,
676 CALLBACK_TIMEOUT)) {
677 amdtp_stream_stop(&bebob->tx_stream);
678 amdtp_stream_stop(&bebob->rx_stream);
679 break_both_connections(bebob);
680 err = -ETIMEDOUT;
681 }
682 }
683 end:
684 return err;
685 }
686
687 void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)
688 {
689 if (bebob->substreams_counter == 0) {
690 amdtp_stream_pcm_abort(&bebob->rx_stream);
691 amdtp_stream_stop(&bebob->rx_stream);
692
693 amdtp_stream_pcm_abort(&bebob->tx_stream);
694 amdtp_stream_stop(&bebob->tx_stream);
695
696 break_both_connections(bebob);
697 }
698 }
699
700 /*
701 * This function should be called before starting streams or after stopping
702 * streams.
703 */
704 void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob)
705 {
706 amdtp_stream_destroy(&bebob->rx_stream);
707 amdtp_stream_destroy(&bebob->tx_stream);
708
709 destroy_both_connections(bebob);
710 }
711
712 /*
713 * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’
714 * in Additional AVC commands (Nov 2003, BridgeCo)
715 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005
716 */
717 static int
718 parse_stream_formation(u8 *buf, unsigned int len,
719 struct snd_bebob_stream_formation *formation)
720 {
721 unsigned int i, e, channels, format;
722
723 /*
724 * this module can support a hierarchy combination that:
725 * Root: Audio and Music (0x90)
726 * Level 1: AM824 Compound (0x40)
727 */
728 if ((buf[0] != 0x90) || (buf[1] != 0x40))
729 return -ENOSYS;
730
731 /* check sampling rate */
732 for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) {
733 if (buf[2] == bridgeco_freq_table[i])
734 break;
735 }
736 if (i == ARRAY_SIZE(bridgeco_freq_table))
737 return -ENOSYS;
738
739 /* Avoid double count by different entries for the same rate. */
740 memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation));
741
742 for (e = 0; e < buf[4]; e++) {
743 channels = buf[5 + e * 2];
744 format = buf[6 + e * 2];
745
746 switch (format) {
747 /* IEC 60958 Conformant, currently handled as MBLA */
748 case 0x00:
749 /* Multi bit linear audio */
750 case 0x06: /* Raw */
751 formation[i].pcm += channels;
752 break;
753 /* MIDI Conformant */
754 case 0x0d:
755 formation[i].midi += channels;
756 break;
757 /* IEC 61937-3 to 7 */
758 case 0x01:
759 case 0x02:
760 case 0x03:
761 case 0x04:
762 case 0x05:
763 /* Multi bit linear audio */
764 case 0x07: /* DVD-Audio */
765 case 0x0c: /* High Precision */
766 /* One Bit Audio */
767 case 0x08: /* (Plain) Raw */
768 case 0x09: /* (Plain) SACD */
769 case 0x0a: /* (Encoded) Raw */
770 case 0x0b: /* (Encoded) SACD */
771 /* Synchronization Stream (Stereo Raw audio) */
772 case 0x40:
773 /* Don't care */
774 case 0xff:
775 default:
776 return -ENOSYS; /* not supported */
777 }
778 }
779
780 if (formation[i].pcm > AM824_MAX_CHANNELS_FOR_PCM ||
781 formation[i].midi > AM824_MAX_CHANNELS_FOR_MIDI)
782 return -ENOSYS;
783
784 return 0;
785 }
786
787 static int
788 fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir,
789 unsigned short pid)
790 {
791 u8 *buf;
792 struct snd_bebob_stream_formation *formations;
793 unsigned int len, eid;
794 u8 addr[AVC_BRIDGECO_ADDR_BYTES];
795 int err;
796
797 buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL);
798 if (buf == NULL)
799 return -ENOMEM;
800
801 if (dir == AVC_BRIDGECO_PLUG_DIR_IN)
802 formations = bebob->rx_stream_formations;
803 else
804 formations = bebob->tx_stream_formations;
805
806 for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) {
807 len = FORMAT_MAXIMUM_LENGTH;
808 avc_bridgeco_fill_unit_addr(addr, dir,
809 AVC_BRIDGECO_PLUG_UNIT_ISOC, pid);
810 err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf,
811 &len, eid);
812 /* No entries remained. */
813 if (err == -EINVAL && eid > 0) {
814 err = 0;
815 break;
816 } else if (err < 0) {
817 dev_err(&bebob->unit->device,
818 "fail to get stream format %d for isoc %s plug %d:%d\n",
819 eid,
820 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
821 "out",
822 pid, err);
823 break;
824 }
825
826 err = parse_stream_formation(buf, len, formations);
827 if (err < 0)
828 break;
829 }
830
831 kfree(buf);
832 return err;
833 }
834
835 static int
836 seek_msu_sync_input_plug(struct snd_bebob *bebob)
837 {
838 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
839 unsigned int i;
840 enum avc_bridgeco_plug_type type;
841 int err;
842
843 /* Get the number of Music Sub Unit for both direction. */
844 err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs);
845 if (err < 0) {
846 dev_err(&bebob->unit->device,
847 "fail to get info for MSU in/out plugs: %d\n",
848 err);
849 goto end;
850 }
851
852 /* seek destination plugs for 'MSU sync input' */
853 bebob->sync_input_plug = -1;
854 for (i = 0; i < plugs[0]; i++) {
855 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i);
856 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
857 if (err < 0) {
858 dev_err(&bebob->unit->device,
859 "fail to get type for MSU in plug %d: %d\n",
860 i, err);
861 goto end;
862 }
863
864 if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) {
865 bebob->sync_input_plug = i;
866 break;
867 }
868 }
869 end:
870 return err;
871 }
872
873 int snd_bebob_stream_discover(struct snd_bebob *bebob)
874 {
875 const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
876 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
877 enum avc_bridgeco_plug_type type;
878 unsigned int i;
879 int err;
880
881 /* the number of plugs for isoc in/out, ext in/out */
882 err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs);
883 if (err < 0) {
884 dev_err(&bebob->unit->device,
885 "fail to get info for isoc/external in/out plugs: %d\n",
886 err);
887 goto end;
888 }
889
890 /*
891 * This module supports at least one isoc input plug and one isoc
892 * output plug.
893 */
894 if ((plugs[0] == 0) || (plugs[1] == 0)) {
895 err = -ENOSYS;
896 goto end;
897 }
898
899 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
900 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
901 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
902 if (err < 0) {
903 dev_err(&bebob->unit->device,
904 "fail to get type for isoc in plug 0: %d\n", err);
905 goto end;
906 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
907 err = -ENOSYS;
908 goto end;
909 }
910 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0);
911 if (err < 0)
912 goto end;
913
914 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
915 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
916 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
917 if (err < 0) {
918 dev_err(&bebob->unit->device,
919 "fail to get type for isoc out plug 0: %d\n", err);
920 goto end;
921 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
922 err = -ENOSYS;
923 goto end;
924 }
925 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0);
926 if (err < 0)
927 goto end;
928
929 /* count external input plugs for MIDI */
930 bebob->midi_input_ports = 0;
931 for (i = 0; i < plugs[2]; i++) {
932 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
933 AVC_BRIDGECO_PLUG_UNIT_EXT, i);
934 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
935 if (err < 0) {
936 dev_err(&bebob->unit->device,
937 "fail to get type for external in plug %d: %d\n",
938 i, err);
939 goto end;
940 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
941 bebob->midi_input_ports++;
942 }
943 }
944
945 /* count external output plugs for MIDI */
946 bebob->midi_output_ports = 0;
947 for (i = 0; i < plugs[3]; i++) {
948 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
949 AVC_BRIDGECO_PLUG_UNIT_EXT, i);
950 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
951 if (err < 0) {
952 dev_err(&bebob->unit->device,
953 "fail to get type for external out plug %d: %d\n",
954 i, err);
955 goto end;
956 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
957 bebob->midi_output_ports++;
958 }
959 }
960
961 /* for check source of clock later */
962 if (!clk_spec)
963 err = seek_msu_sync_input_plug(bebob);
964 end:
965 return err;
966 }
967
968 void snd_bebob_stream_lock_changed(struct snd_bebob *bebob)
969 {
970 bebob->dev_lock_changed = true;
971 wake_up(&bebob->hwdep_wait);
972 }
973
974 int snd_bebob_stream_lock_try(struct snd_bebob *bebob)
975 {
976 int err;
977
978 spin_lock_irq(&bebob->lock);
979
980 /* user land lock this */
981 if (bebob->dev_lock_count < 0) {
982 err = -EBUSY;
983 goto end;
984 }
985
986 /* this is the first time */
987 if (bebob->dev_lock_count++ == 0)
988 snd_bebob_stream_lock_changed(bebob);
989 err = 0;
990 end:
991 spin_unlock_irq(&bebob->lock);
992 return err;
993 }
994
995 void snd_bebob_stream_lock_release(struct snd_bebob *bebob)
996 {
997 spin_lock_irq(&bebob->lock);
998
999 if (WARN_ON(bebob->dev_lock_count <= 0))
1000 goto end;
1001 if (--bebob->dev_lock_count == 0)
1002 snd_bebob_stream_lock_changed(bebob);
1003 end:
1004 spin_unlock_irq(&bebob->lock);
1005 }
Linux with added FPC-III support