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Merge branch 'for-linus' into for-next
[linux-2.6-block.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
9a73195e 11#define CALLBACK_TIMEOUT 2000
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
07905298
LT		 50static int
51get_formation_index(unsigned int rate, unsigned int *index)
eb7b3a05
TS		 52{
53 unsigned int i;
54
55 for (i = 0; i < ARRAY_SIZE(snd_bebob_rate_table); i++) {
07905298
LT		 56 if (snd_bebob_rate_table[i] == rate) {
57 *index = i;
58 return 0;
59 }
eb7b3a05
TS		 60 }
61 return -EINVAL;
62}
63
64int
65snd_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);
93end:
94 return err;
95}
96
97int
98snd_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);
117end:
118 return err;
119}
120
3e254b16
TS		 121int snd_bebob_stream_get_clock_src(struct snd_bebob *bebob,
122 enum snd_bebob_clock_type *src)
eb7b3a05 123{
6b9866c8 124 const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
eb7b3a05 125 u8 addr[AVC_BRIDGECO_ADDR_BYTES], input[7];
1fc9522a 126 unsigned int id;
5a668812 127 enum avc_bridgeco_plug_type type;
eb7b3a05
TS		 128 int err = 0;
129
1fc9522a
TS		 130 /* 1.The device has its own operation to switch source of clock */
131 if (clk_spec) {
132 err = clk_spec->get(bebob, &id);
d1d0b6b6 133 if (err < 0) {
1fc9522a
TS		 134 dev_err(&bebob->unit->device,
135 "fail to get clock source: %d\n", err);
d1d0b6b6
CV		 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
3e254b16 147 *src = clk_spec->types[id];
1fc9522a
TS		 148 goto end;
149 }
150
eb7b3a05 151 /*
1fc9522a 152 * 2.The device don't support to switch source of clock then assumed
eb7b3a05
TS		 153 * to use internal clock always
154 */
155 if (bebob->sync_input_plug < 0) {
3e254b16 156 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
eb7b3a05
TS		 157 goto end;
158 }
159
160 /*
1fc9522a 161 * 3.The device supports to switch source of clock by an usual way.
eb7b3a05
TS		 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) {
3e254b16 179 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
eb7b3a05
TS		 180 goto end;
181 }
182
5a668812
TS		 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) {
3e254b16 192 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
5a668812
TS		 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 */
3e254b16 206 *src = SND_BEBOB_CLOCK_TYPE_SYT;
5a668812
TS		 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 */
3e254b16 214 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL;
5a668812
TS		 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 */
3e254b16 233 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL;
5a668812
TS		 234 goto end;
235 } else if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) {
236 /* Often word clock. */
3e254b16 237 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL;
5a668812
TS		 238 goto end;
239 } else if (type == AVC_BRIDGECO_PLUG_TYPE_ADDITION) {
240 /*
241 * Not standard.
242 * Mostly, additional internal clock.
243 */
3e254b16 244 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
5a668812
TS		 245 goto end;
246 }
247 }
248 }
249
250 /* Not supported. */
251 err = -EIO;
eb7b3a05
TS		 252end:
253 return err;
254}
255
256static unsigned int
257map_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
9076c22d
TS		 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
eb7b3a05
TS		 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 }
f65be911 343 amdtp_am824_set_midi_position(s, stm_pos);
eb7b3a05
TS		 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;
49c7b3fc 359 if (location >= AM824_MAX_CHANNELS_FOR_PCM) {
eb7b3a05
TS		 360 err = -ENOSYS;
361 goto end;
362 }
f65be911
TS		 363 amdtp_am824_set_pcm_position(s, location,
364 stm_pos);
eb7b3a05
TS		 365 break;
366 }
367 }
368
369 if (type != 0x0a)
370 pcm += channels;
371 else
372 midi += channels;
373 }
374end:
375 kfree(buf);
376 return err;
377}
378
379static int
380init_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);
393end:
394 return err;
395}
396
397static int
398check_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
421static int
422make_both_connections(struct snd_bebob *bebob, unsigned int rate)
423{
b6bc8123
TS		 424 int index, pcm_channels, midi_channels, err = 0;
425
426 if (bebob->connected)
427 goto end;
eb7b3a05
TS		 428
429 /* confirm params for both streams */
07905298
LT		 430 err = get_formation_index(rate, &index);
431 if (err < 0)
432 goto end;
eb7b3a05
TS		 433 pcm_channels = bebob->tx_stream_formations[index].pcm;
434 midi_channels = bebob->tx_stream_formations[index].midi;
51c29fd2
TS		 435 err = amdtp_am824_set_parameters(&bebob->tx_stream, rate,
436 pcm_channels, midi_channels * 8,
437 false);
547e631c
TS		 438 if (err < 0)
439 goto end;
440
eb7b3a05
TS		 441 pcm_channels = bebob->rx_stream_formations[index].pcm;
442 midi_channels = bebob->rx_stream_formations[index].midi;
51c29fd2
TS		 443 err = amdtp_am824_set_parameters(&bebob->rx_stream, rate,
444 pcm_channels, midi_channels * 8,
445 false);
547e631c
TS		 446 if (err < 0)
447 goto end;
eb7b3a05
TS		 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));
b6bc8123 456 if (err < 0) {
eb7b3a05 457 cmp_connection_break(&bebob->out_conn);
b6bc8123
TS		 458 goto end;
459 }
460
461 bebob->connected = true;
eb7b3a05
TS		 462end:
463 return err;
464}
465
466static void
467break_both_connections(struct snd_bebob *bebob)
468{
469 cmp_connection_break(&bebob->in_conn);
470 cmp_connection_break(&bebob->out_conn);
b6bc8123
TS		 471
472 bebob->connected = false;
3149ac48
TS		 473
474 /* These models seems to be in transition state for a longer time. */
475 if (bebob->maudio_special_quirk != NULL)
476 msleep(200);
eb7b3a05
TS		 477}
478
479static void
480destroy_both_connections(struct snd_bebob *bebob)
481{
eb7b3a05
TS		 482 cmp_connection_destroy(&bebob->in_conn);
483 cmp_connection_destroy(&bebob->out_conn);
484}
485
486static int
487get_sync_mode(struct snd_bebob *bebob, enum cip_flags *sync_mode)
488{
05773792
TS		 489 enum snd_bebob_clock_type src;
490 int err;
491
492 err = snd_bebob_stream_get_clock_src(bebob, &src);
493 if (err < 0)
494 return err;
495
496 switch (src) {
497 case SND_BEBOB_CLOCK_TYPE_INTERNAL:
498 case SND_BEBOB_CLOCK_TYPE_EXTERNAL:
499 *sync_mode = CIP_SYNC_TO_DEVICE;
500 break;
501 default:
502 case SND_BEBOB_CLOCK_TYPE_SYT:
503 *sync_mode = 0;
504 break;
505 }
506
eb7b3a05
TS		 507 return 0;
508}
509
510static int
511start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream,
512 unsigned int rate)
513{
514 struct cmp_connection *conn;
515 int err = 0;
516
517 if (stream == &bebob->rx_stream)
518 conn = &bebob->in_conn;
519 else
520 conn = &bebob->out_conn;
521
522 /* channel mapping */
3149ac48
TS		 523 if (bebob->maudio_special_quirk == NULL) {
524 err = map_data_channels(bebob, stream);
525 if (err < 0)
526 goto end;
527 }
eb7b3a05
TS		 528
529 /* start amdtp stream */
530 err = amdtp_stream_start(stream,
531 conn->resources.channel,
532 conn->speed);
533end:
534 return err;
535}
536
537int snd_bebob_stream_init_duplex(struct snd_bebob *bebob)
538{
539 int err;
540
541 err = init_both_connections(bebob);
542 if (err < 0)
543 goto end;
544
5955815e
TS		 545 err = amdtp_am824_init(&bebob->tx_stream, bebob->unit,
546 AMDTP_IN_STREAM, CIP_BLOCKING);
eb7b3a05
TS		 547 if (err < 0) {
548 amdtp_stream_destroy(&bebob->tx_stream);
549 destroy_both_connections(bebob);
550 goto end;
551 }
14a37ac1 552
b6bc8123 553 bebob->tx_stream.flags |= CIP_SKIP_INIT_DBC_CHECK;
c4d860a0
TS		 554
555 /*
556 * BeBoB v3 transfers packets with these qurks:
557 * - In the beginning of streaming, the value of dbc is incremented
558 * even if no data blocks are transferred.
559 * - The value of dbc is reset suddenly.
560 */
561 if (bebob->version > 2)
562 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC |
563 CIP_SKIP_DBC_ZERO_CHECK;
564
9d59124c
TS		 565 /*
566 * At high sampling rate, M-Audio special firmware transmits empty
567 * packet with the value of dbc incremented by 8 but the others are
568 * valid to IEC 61883-1.
569 */
570 if (bebob->maudio_special_quirk)
571 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC;
eb7b3a05 572
5955815e
TS		 573 err = amdtp_am824_init(&bebob->rx_stream, bebob->unit,
574 AMDTP_OUT_STREAM, CIP_BLOCKING);
eb7b3a05
TS		 575 if (err < 0) {
576 amdtp_stream_destroy(&bebob->tx_stream);
577 amdtp_stream_destroy(&bebob->rx_stream);
578 destroy_both_connections(bebob);
579 }
580end:
581 return err;
582}
583
4a286d55 584int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate)
eb7b3a05 585{
6b9866c8 586 const struct snd_bebob_rate_spec *rate_spec = bebob->spec->rate;
eb7b3a05 587 struct amdtp_stream *master, *slave;
eb7b3a05
TS		 588 enum cip_flags sync_mode;
589 unsigned int curr_rate;
590 int err = 0;
591
eb7b3a05 592 /* Need no substreams */
4fd6c6c7 593 if (bebob->substreams_counter == 0)
eb7b3a05
TS		 594 goto end;
595
596 err = get_sync_mode(bebob, &sync_mode);
597 if (err < 0)
598 goto end;
599 if (sync_mode == CIP_SYNC_TO_DEVICE) {
600 master = &bebob->tx_stream;
601 slave = &bebob->rx_stream;
eb7b3a05
TS		 602 } else {
603 master = &bebob->rx_stream;
604 slave = &bebob->tx_stream;
eb7b3a05
TS		 605 }
606
607 /*
608 * Considering JACK/FFADO streaming:
609 * TODO: This can be removed hwdep functionality becomes popular.
610 */
611 err = check_connection_used_by_others(bebob, master);
612 if (err < 0)
613 goto end;
614
b6bc8123
TS		 615 /*
616 * packet queueing error or detecting discontinuity
617 *
618 * At bus reset, connections should not be broken here. So streams need
619 * to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag.
620 */
621 if (amdtp_streaming_error(master))
eb7b3a05 622 amdtp_stream_stop(master);
eb7b3a05
TS		 623 if (amdtp_streaming_error(slave))
624 amdtp_stream_stop(slave);
14a37ac1 625 if (!amdtp_stream_running(master) && !amdtp_stream_running(slave))
b6bc8123 626 break_both_connections(bebob);
eb7b3a05
TS		 627
628 /* stop streams if rate is different */
1fc9522a 629 err = rate_spec->get(bebob, &curr_rate);
eb7b3a05
TS		 630 if (err < 0) {
631 dev_err(&bebob->unit->device,
632 "fail to get sampling rate: %d\n", err);
633 goto end;
634 }
635 if (rate == 0)
636 rate = curr_rate;
637 if (rate != curr_rate) {
638 amdtp_stream_stop(master);
639 amdtp_stream_stop(slave);
640 break_both_connections(bebob);
641 }
642
643 /* master should be always running */
644 if (!amdtp_stream_running(master)) {
645 amdtp_stream_set_sync(sync_mode, master, slave);
646 bebob->master = master;
647
648 /*
649 * NOTE:
650 * If establishing connections at first, Yamaha GO46
651 * (and maybe Terratec X24) don't generate sound.
3149ac48
TS		 652 *
653 * For firmware customized by M-Audio, refer to next NOTE.
eb7b3a05 654 */
3149ac48
TS		 655 if (bebob->maudio_special_quirk == NULL) {
656 err = rate_spec->set(bebob, rate);
657 if (err < 0) {
658 dev_err(&bebob->unit->device,
659 "fail to set sampling rate: %d\n",
660 err);
661 goto end;
662 }
eb7b3a05
TS		 663 }
664
665 err = make_both_connections(bebob, rate);
666 if (err < 0)
667 goto end;
668
669 err = start_stream(bebob, master, rate);
670 if (err < 0) {
671 dev_err(&bebob->unit->device,
672 "fail to run AMDTP master stream:%d\n", err);
673 break_both_connections(bebob);
674 goto end;
675 }
676
3149ac48
TS		 677 /*
678 * NOTE:
679 * The firmware customized by M-Audio uses these commands to
680 * start transmitting stream. This is not usual way.
681 */
682 if (bebob->maudio_special_quirk != NULL) {
683 err = rate_spec->set(bebob, rate);
684 if (err < 0) {
685 dev_err(&bebob->unit->device,
686 "fail to ensure sampling rate: %d\n",
687 err);
688 amdtp_stream_stop(master);
689 break_both_connections(bebob);
690 goto end;
691 }
692 }
693
eb7b3a05
TS		 694 /* wait first callback */
695 if (!amdtp_stream_wait_callback(master, CALLBACK_TIMEOUT)) {
696 amdtp_stream_stop(master);
697 break_both_connections(bebob);
698 err = -ETIMEDOUT;
699 goto end;
700 }
701 }
702
703 /* start slave if needed */
8d1c2694 704 if (!amdtp_stream_running(slave)) {
eb7b3a05
TS		 705 err = start_stream(bebob, slave, rate);
706 if (err < 0) {
707 dev_err(&bebob->unit->device,
708 "fail to run AMDTP slave stream:%d\n", err);
709 amdtp_stream_stop(master);
710 break_both_connections(bebob);
711 goto end;
712 }
713
714 /* wait first callback */
715 if (!amdtp_stream_wait_callback(slave, CALLBACK_TIMEOUT)) {
716 amdtp_stream_stop(slave);
717 amdtp_stream_stop(master);
718 break_both_connections(bebob);
719 err = -ETIMEDOUT;
720 }
721 }
722end:
eb7b3a05
TS		 723 return err;
724}
725
726void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)
727{
728 struct amdtp_stream *master, *slave;
eb7b3a05 729
eb7b3a05
TS		 730 if (bebob->master == &bebob->rx_stream) {
731 slave = &bebob->tx_stream;
732 master = &bebob->rx_stream;
eb7b3a05
TS		 733 } else {
734 slave = &bebob->rx_stream;
735 master = &bebob->tx_stream;
eb7b3a05
TS		 736 }
737
4fd6c6c7 738 if (bebob->substreams_counter == 0) {
8d1c2694
TS		 739 amdtp_stream_pcm_abort(master);
740 amdtp_stream_stop(master);
741
eb7b3a05
TS		 742 amdtp_stream_pcm_abort(slave);
743 amdtp_stream_stop(slave);
744
8d1c2694 745 break_both_connections(bebob);
eb7b3a05 746 }
eb7b3a05
TS		 747}
748
d23c2cc4
TS		 749/*
750 * This function should be called before starting streams or after stopping
751 * streams.
752 */
eb7b3a05
TS		 753void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob)
754{
eb7b3a05
TS		 755 amdtp_stream_destroy(&bebob->rx_stream);
756 amdtp_stream_destroy(&bebob->tx_stream);
757
758 destroy_both_connections(bebob);
eb7b3a05
TS		 759}
760
761/*
762 * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’
763 * in Additional AVC commands (Nov 2003, BridgeCo)
764 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005
765 */
766static int
767parse_stream_formation(u8 *buf, unsigned int len,
768 struct snd_bebob_stream_formation *formation)
769{
770 unsigned int i, e, channels, format;
771
772 /*
773 * this module can support a hierarchy combination that:
774 * Root: Audio and Music (0x90)
775 * Level 1: AM824 Compound (0x40)
776 */
777 if ((buf[0] != 0x90) || (buf[1] != 0x40))
778 return -ENOSYS;
779
780 /* check sampling rate */
781 for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) {
782 if (buf[2] == bridgeco_freq_table[i])
783 break;
784 }
33a5f989 785 if (i == ARRAY_SIZE(bridgeco_freq_table))
eb7b3a05
TS		 786 return -ENOSYS;
787
788 /* Avoid double count by different entries for the same rate. */
789 memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation));
790
791 for (e = 0; e < buf[4]; e++) {
792 channels = buf[5 + e * 2];
793 format = buf[6 + e * 2];
794
795 switch (format) {
51fa31d4 796 /* IEC 60958 Conformant, currently handled as MBLA */
eb7b3a05
TS		 797 case 0x00:
798 /* Multi bit linear audio */
799 case 0x06: /* Raw */
800 formation[i].pcm += channels;
801 break;
802 /* MIDI Conformant */
803 case 0x0d:
804 formation[i].midi += channels;
805 break;
806 /* IEC 61937-3 to 7 */
807 case 0x01:
808 case 0x02:
809 case 0x03:
810 case 0x04:
811 case 0x05:
812 /* Multi bit linear audio */
813 case 0x07: /* DVD-Audio */
814 case 0x0c: /* High Precision */
815 /* One Bit Audio */
816 case 0x08: /* (Plain) Raw */
817 case 0x09: /* (Plain) SACD */
818 case 0x0a: /* (Encoded) Raw */
819 case 0x0b: /* (Encoded) SACD */
820 /* Synchronization Stream (Stereo Raw audio) */
821 case 0x40:
822 /* Don't care */
823 case 0xff:
824 default:
825 return -ENOSYS; /* not supported */
826 }
827 }
828
49c7b3fc
TS		 829 if (formation[i].pcm > AM824_MAX_CHANNELS_FOR_PCM ||
830 formation[i].midi > AM824_MAX_CHANNELS_FOR_MIDI)
eb7b3a05
TS		 831 return -ENOSYS;
832
833 return 0;
834}
835
836static int
837fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir,
838 unsigned short pid)
839{
840 u8 *buf;
841 struct snd_bebob_stream_formation *formations;
842 unsigned int len, eid;
843 u8 addr[AVC_BRIDGECO_ADDR_BYTES];
844 int err;
845
846 buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL);
847 if (buf == NULL)
848 return -ENOMEM;
849
850 if (dir == AVC_BRIDGECO_PLUG_DIR_IN)
851 formations = bebob->rx_stream_formations;
852 else
853 formations = bebob->tx_stream_formations;
854
855 for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) {
856 len = FORMAT_MAXIMUM_LENGTH;
857 avc_bridgeco_fill_unit_addr(addr, dir,
858 AVC_BRIDGECO_PLUG_UNIT_ISOC, pid);
859 err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf,
860 &len, eid);
861 /* No entries remained. */
862 if (err == -EINVAL && eid > 0) {
863 err = 0;
864 break;
865 } else if (err < 0) {
866 dev_err(&bebob->unit->device,
867 "fail to get stream format %d for isoc %s plug %d:%d\n",
868 eid,
869 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
870 "out",
871 pid, err);
872 break;
873 }
874
875 err = parse_stream_formation(buf, len, formations);
876 if (err < 0)
877 break;
878 }
879
880 kfree(buf);
881 return err;
882}
883
884static int
885seek_msu_sync_input_plug(struct snd_bebob *bebob)
886{
887 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
a6b598bf
TS		 888 unsigned int i;
889 enum avc_bridgeco_plug_type type;
eb7b3a05
TS		 890 int err;
891
892 /* Get the number of Music Sub Unit for both direction. */
893 err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs);
894 if (err < 0) {
895 dev_err(&bebob->unit->device,
896 "fail to get info for MSU in/out plugs: %d\n",
897 err);
898 goto end;
899 }
900
901 /* seek destination plugs for 'MSU sync input' */
902 bebob->sync_input_plug = -1;
903 for (i = 0; i < plugs[0]; i++) {
904 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i);
905 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
906 if (err < 0) {
907 dev_err(&bebob->unit->device,
908 "fail to get type for MSU in plug %d: %d\n",
909 i, err);
910 goto end;
911 }
912
913 if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) {
914 bebob->sync_input_plug = i;
915 break;
916 }
917 }
918end:
919 return err;
920}
921
922int snd_bebob_stream_discover(struct snd_bebob *bebob)
923{
6b9866c8 924 const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
eb7b3a05
TS		 925 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
926 enum avc_bridgeco_plug_type type;
927 unsigned int i;
928 int err;
929
930 /* the number of plugs for isoc in/out, ext in/out */
931 err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs);
932 if (err < 0) {
933 dev_err(&bebob->unit->device,
934 "fail to get info for isoc/external in/out plugs: %d\n",
935 err);
936 goto end;
937 }
938
939 /*
940 * This module supports at least one isoc input plug and one isoc
941 * output plug.
942 */
943 if ((plugs[0] == 0) || (plugs[1] == 0)) {
944 err = -ENOSYS;
945 goto end;
946 }
947
948 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
949 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
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 isoc in plug 0: %d\n", err);
954 goto end;
955 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
956 err = -ENOSYS;
957 goto end;
958 }
959 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0);
960 if (err < 0)
961 goto end;
962
963 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
964 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
965 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
966 if (err < 0) {
967 dev_err(&bebob->unit->device,
968 "fail to get type for isoc out plug 0: %d\n", err);
969 goto end;
970 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
971 err = -ENOSYS;
972 goto end;
973 }
974 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0);
975 if (err < 0)
976 goto end;
977
978 /* count external input plugs for MIDI */
979 bebob->midi_input_ports = 0;
980 for (i = 0; i < plugs[2]; i++) {
981 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
982 AVC_BRIDGECO_PLUG_UNIT_EXT, i);
983 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
984 if (err < 0) {
985 dev_err(&bebob->unit->device,
986 "fail to get type for external in plug %d: %d\n",
987 i, err);
988 goto end;
989 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
990 bebob->midi_input_ports++;
991 }
992 }
993
994 /* count external output plugs for MIDI */
995 bebob->midi_output_ports = 0;
996 for (i = 0; i < plugs[3]; i++) {
997 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
998 AVC_BRIDGECO_PLUG_UNIT_EXT, i);
999 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
1000 if (err < 0) {
1001 dev_err(&bebob->unit->device,
1002 "fail to get type for external out plug %d: %d\n",
1003 i, err);
1004 goto end;
1005 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
1006 bebob->midi_output_ports++;
1007 }
1008 }
1009
1010 /* for check source of clock later */
1fc9522a
TS		 1011 if (!clk_spec)
1012 err = seek_msu_sync_input_plug(bebob);
eb7b3a05
TS		 1013end:
1014 return err;
1015}
618eabea
TS		 1016
1017void snd_bebob_stream_lock_changed(struct snd_bebob *bebob)
1018{
1019 bebob->dev_lock_changed = true;
1020 wake_up(&bebob->hwdep_wait);
1021}
1022
1023int snd_bebob_stream_lock_try(struct snd_bebob *bebob)
1024{
1025 int err;
1026
1027 spin_lock_irq(&bebob->lock);
1028
1029 /* user land lock this */
1030 if (bebob->dev_lock_count < 0) {
1031 err = -EBUSY;
1032 goto end;
1033 }
1034
1035 /* this is the first time */
1036 if (bebob->dev_lock_count++ == 0)
1037 snd_bebob_stream_lock_changed(bebob);
1038 err = 0;
1039end:
1040 spin_unlock_irq(&bebob->lock);
1041 return err;
1042}
1043
1044void snd_bebob_stream_lock_release(struct snd_bebob *bebob)
1045{
1046 spin_lock_irq(&bebob->lock);
1047
1048 if (WARN_ON(bebob->dev_lock_count <= 0))
1049 goto end;
1050 if (--bebob->dev_lock_count == 0)
1051 snd_bebob_stream_lock_changed(bebob);
1052end:
1053 spin_unlock_irq(&bebob->lock);
1054}
Linux 6.x block layer and io_uring tree(s)