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ALSA: firewire-lib: move PCM substream constraint to AM824 layer
[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
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
3e254b16
TS		 119int snd_bebob_stream_get_clock_src(struct snd_bebob *bebob,
120 enum snd_bebob_clock_type *src)
eb7b3a05 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;
5a668812 125 enum avc_bridgeco_plug_type type;
eb7b3a05
TS		 126 int err = 0;
127
1fc9522a
TS		 128 /* 1.The device has its own operation to switch source of clock */
129 if (clk_spec) {
130 err = clk_spec->get(bebob, &id);
d1d0b6b6 131 if (err < 0) {
1fc9522a
TS		 132 dev_err(&bebob->unit->device,
133 "fail to get clock source: %d\n", err);
d1d0b6b6
CV		 134 goto end;
135 }
136
137 if (id >= clk_spec->num) {
138 dev_err(&bebob->unit->device,
139 "clock source %d out of range 0..%d\n",
140 id, clk_spec->num - 1);
141 err = -EIO;
142 goto end;
143 }
144
3e254b16 145 *src = clk_spec->types[id];
1fc9522a
TS		 146 goto end;
147 }
148
eb7b3a05 149 /*
1fc9522a 150 * 2.The device don't support to switch source of clock then assumed
eb7b3a05
TS		 151 * to use internal clock always
152 */
153 if (bebob->sync_input_plug < 0) {
3e254b16 154 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
eb7b3a05
TS		 155 goto end;
156 }
157
158 /*
1fc9522a 159 * 3.The device supports to switch source of clock by an usual way.
eb7b3a05
TS		 160 * Let's check input for 'Music Sub Unit Sync Input' plug.
161 */
162 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
163 bebob->sync_input_plug);
164 err = avc_bridgeco_get_plug_input(bebob->unit, addr, input);
165 if (err < 0) {
166 dev_err(&bebob->unit->device,
167 "fail to get an input for MSU in plug %d: %d\n",
168 bebob->sync_input_plug, err);
169 goto end;
170 }
171
172 /*
173 * If there are no input plugs, all of fields are 0xff.
174 * Here check the first field. This field is used for direction.
175 */
176 if (input[0] == 0xff) {
3e254b16 177 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
eb7b3a05
TS		 178 goto end;
179 }
180
5a668812
TS		 181 /* The source from any output plugs is for one purpose only. */
182 if (input[0] == AVC_BRIDGECO_PLUG_DIR_OUT) {
183 /*
184 * In BeBoB architecture, the source from music subunit may
185 * bypass from oPCR[0]. This means that this source gives
186 * synchronization to IEEE 1394 cycle start packet.
187 */
188 if (input[1] == AVC_BRIDGECO_PLUG_MODE_SUBUNIT &&
189 input[2] == 0x0c) {
3e254b16 190 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
5a668812
TS		 191 goto end;
192 }
193 /* The source from any input units is for several purposes. */
194 } else if (input[1] == AVC_BRIDGECO_PLUG_MODE_UNIT) {
195 if (input[2] == AVC_BRIDGECO_PLUG_UNIT_ISOC) {
196 if (input[3] == 0x00) {
197 /*
198 * This source comes from iPCR[0]. This means
199 * that presentation timestamp calculated by
200 * SYT series of the received packets. In
201 * short, this driver is the master of
202 * synchronization.
203 */
3e254b16 204 *src = SND_BEBOB_CLOCK_TYPE_SYT;
5a668812
TS		 205 goto end;
206 } else {
207 /*
208 * This source comes from iPCR[1-29]. This
209 * means that the synchronization stream is not
210 * the Audio/MIDI compound stream.
211 */
3e254b16 212 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL;
5a668812
TS		 213 goto end;
214 }
215 } else if (input[2] == AVC_BRIDGECO_PLUG_UNIT_EXT) {
216 /* Check type of this plug. */
217 avc_bridgeco_fill_unit_addr(addr,
218 AVC_BRIDGECO_PLUG_DIR_IN,
219 AVC_BRIDGECO_PLUG_UNIT_EXT,
220 input[3]);
221 err = avc_bridgeco_get_plug_type(bebob->unit, addr,
222 &type);
223 if (err < 0)
224 goto end;
225
226 if (type == AVC_BRIDGECO_PLUG_TYPE_DIG) {
227 /*
228 * SPDIF/ADAT or sometimes (not always) word
229 * clock.
230 */
3e254b16 231 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL;
5a668812
TS		 232 goto end;
233 } else if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) {
234 /* Often word clock. */
3e254b16 235 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL;
5a668812
TS		 236 goto end;
237 } else if (type == AVC_BRIDGECO_PLUG_TYPE_ADDITION) {
238 /*
239 * Not standard.
240 * Mostly, additional internal clock.
241 */
3e254b16 242 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL;
5a668812
TS		 243 goto end;
244 }
245 }
246 }
247
248 /* Not supported. */
249 err = -EIO;
eb7b3a05
TS		 250end:
251 return err;
252}
253
254static unsigned int
255map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s)
256{
257 unsigned int sec, sections, ch, channels;
258 unsigned int pcm, midi, location;
259 unsigned int stm_pos, sec_loc, pos;
260 u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type;
261 enum avc_bridgeco_plug_dir dir;
262 int err;
263
264 /*
265 * The length of return value of this command cannot be expected. Here
266 * use the maximum length of FCP.
267 */
268 buf = kzalloc(256, GFP_KERNEL);
269 if (buf == NULL)
270 return -ENOMEM;
271
272 if (s == &bebob->tx_stream)
273 dir = AVC_BRIDGECO_PLUG_DIR_OUT;
274 else
275 dir = AVC_BRIDGECO_PLUG_DIR_IN;
276
277 avc_bridgeco_fill_unit_addr(addr, dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
278 err = avc_bridgeco_get_plug_ch_pos(bebob->unit, addr, buf, 256);
279 if (err < 0) {
280 dev_err(&bebob->unit->device,
281 "fail to get channel position for isoc %s plug 0: %d\n",
282 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out",
283 err);
284 goto end;
285 }
286 pos = 0;
287
288 /* positions in I/O buffer */
289 pcm = 0;
290 midi = 0;
291
292 /* the number of sections in AMDTP packet */
293 sections = buf[pos++];
294
295 for (sec = 0; sec < sections; sec++) {
296 /* type of this section */
297 avc_bridgeco_fill_unit_addr(addr, dir,
298 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
299 err = avc_bridgeco_get_plug_section_type(bebob->unit, addr,
300 sec, &type);
301 if (err < 0) {
302 dev_err(&bebob->unit->device,
303 "fail to get section type for isoc %s plug 0: %d\n",
304 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
305 "out",
306 err);
307 goto end;
308 }
309 /* NoType */
310 if (type == 0xff) {
311 err = -ENOSYS;
312 goto end;
313 }
314
315 /* the number of channels in this section */
316 channels = buf[pos++];
317
318 for (ch = 0; ch < channels; ch++) {
319 /* position of this channel in AMDTP packet */
320 stm_pos = buf[pos++] - 1;
321 /* location of this channel in this section */
322 sec_loc = buf[pos++] - 1;
323
9076c22d
TS		 324 /*
325 * Basically the number of location is within the
326 * number of channels in this section. But some models
327 * of M-Audio don't follow this. Its location for MIDI
328 * is the position of MIDI channels in AMDTP packet.
329 */
330 if (sec_loc >= channels)
331 sec_loc = ch;
332
eb7b3a05
TS		 333 switch (type) {
334 /* for MIDI conformant data channel */
335 case 0x0a:
336 /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */
337 if ((midi > 0) && (stm_pos != midi)) {
338 err = -ENOSYS;
339 goto end;
340 }
341 s->midi_position = stm_pos;
342 midi = stm_pos;
343 break;
344 /* for PCM data channel */
345 case 0x01: /* Headphone */
346 case 0x02: /* Microphone */
347 case 0x03: /* Line */
348 case 0x04: /* SPDIF */
349 case 0x05: /* ADAT */
350 case 0x06: /* TDIF */
351 case 0x07: /* MADI */
352 /* for undefined/changeable signal */
353 case 0x08: /* Analog */
354 case 0x09: /* Digital */
355 default:
356 location = pcm + sec_loc;
357 if (location >= AMDTP_MAX_CHANNELS_FOR_PCM) {
358 err = -ENOSYS;
359 goto end;
360 }
361 s->pcm_positions[location] = stm_pos;
362 break;
363 }
364 }
365
366 if (type != 0x0a)
367 pcm += channels;
368 else
369 midi += channels;
370 }
371end:
372 kfree(buf);
373 return err;
374}
375
376static int
377init_both_connections(struct snd_bebob *bebob)
378{
379 int err;
380
381 err = cmp_connection_init(&bebob->in_conn,
382 bebob->unit, CMP_INPUT, 0);
383 if (err < 0)
384 goto end;
385
386 err = cmp_connection_init(&bebob->out_conn,
387 bebob->unit, CMP_OUTPUT, 0);
388 if (err < 0)
389 cmp_connection_destroy(&bebob->in_conn);
390end:
391 return err;
392}
393
394static int
395check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s)
396{
397 struct cmp_connection *conn;
398 bool used;
399 int err;
400
401 if (s == &bebob->tx_stream)
402 conn = &bebob->out_conn;
403 else
404 conn = &bebob->in_conn;
405
406 err = cmp_connection_check_used(conn, &used);
407 if ((err >= 0) && used && !amdtp_stream_running(s)) {
408 dev_err(&bebob->unit->device,
409 "Connection established by others: %cPCR[%d]\n",
410 (conn->direction == CMP_OUTPUT) ? 'o' : 'i',
411 conn->pcr_index);
412 err = -EBUSY;
413 }
414
415 return err;
416}
417
418static int
419make_both_connections(struct snd_bebob *bebob, unsigned int rate)
420{
b6bc8123
TS		 421 int index, pcm_channels, midi_channels, err = 0;
422
423 if (bebob->connected)
424 goto end;
eb7b3a05
TS		 425
426 /* confirm params for both streams */
427 index = get_formation_index(rate);
428 pcm_channels = bebob->tx_stream_formations[index].pcm;
429 midi_channels = bebob->tx_stream_formations[index].midi;
51c29fd2
TS		 430 err = amdtp_am824_set_parameters(&bebob->tx_stream, rate,
431 pcm_channels, midi_channels * 8,
432 false);
547e631c
TS		 433 if (err < 0)
434 goto end;
435
eb7b3a05
TS		 436 pcm_channels = bebob->rx_stream_formations[index].pcm;
437 midi_channels = bebob->rx_stream_formations[index].midi;
51c29fd2
TS		 438 err = amdtp_am824_set_parameters(&bebob->rx_stream, rate,
439 pcm_channels, midi_channels * 8,
440 false);
547e631c
TS		 441 if (err < 0)
442 goto end;
eb7b3a05
TS		 443
444 /* establish connections for both streams */
445 err = cmp_connection_establish(&bebob->out_conn,
446 amdtp_stream_get_max_payload(&bebob->tx_stream));
447 if (err < 0)
448 goto end;
449 err = cmp_connection_establish(&bebob->in_conn,
450 amdtp_stream_get_max_payload(&bebob->rx_stream));
b6bc8123 451 if (err < 0) {
eb7b3a05 452 cmp_connection_break(&bebob->out_conn);
b6bc8123
TS		 453 goto end;
454 }
455
456 bebob->connected = true;
eb7b3a05
TS		 457end:
458 return err;
459}
460
461static void
462break_both_connections(struct snd_bebob *bebob)
463{
464 cmp_connection_break(&bebob->in_conn);
465 cmp_connection_break(&bebob->out_conn);
b6bc8123
TS		 466
467 bebob->connected = false;
3149ac48
TS		 468
469 /* These models seems to be in transition state for a longer time. */
470 if (bebob->maudio_special_quirk != NULL)
471 msleep(200);
eb7b3a05
TS		 472}
473
474static void
475destroy_both_connections(struct snd_bebob *bebob)
476{
eb7b3a05
TS		 477 cmp_connection_destroy(&bebob->in_conn);
478 cmp_connection_destroy(&bebob->out_conn);
479}
480
481static int
482get_sync_mode(struct snd_bebob *bebob, enum cip_flags *sync_mode)
483{
05773792
TS		 484 enum snd_bebob_clock_type src;
485 int err;
486
487 err = snd_bebob_stream_get_clock_src(bebob, &src);
488 if (err < 0)
489 return err;
490
491 switch (src) {
492 case SND_BEBOB_CLOCK_TYPE_INTERNAL:
493 case SND_BEBOB_CLOCK_TYPE_EXTERNAL:
494 *sync_mode = CIP_SYNC_TO_DEVICE;
495 break;
496 default:
497 case SND_BEBOB_CLOCK_TYPE_SYT:
498 *sync_mode = 0;
499 break;
500 }
501
eb7b3a05
TS		 502 return 0;
503}
504
505static int
506start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream,
507 unsigned int rate)
508{
509 struct cmp_connection *conn;
510 int err = 0;
511
512 if (stream == &bebob->rx_stream)
513 conn = &bebob->in_conn;
514 else
515 conn = &bebob->out_conn;
516
517 /* channel mapping */
3149ac48
TS		 518 if (bebob->maudio_special_quirk == NULL) {
519 err = map_data_channels(bebob, stream);
520 if (err < 0)
521 goto end;
522 }
eb7b3a05
TS		 523
524 /* start amdtp stream */
525 err = amdtp_stream_start(stream,
526 conn->resources.channel,
527 conn->speed);
528end:
529 return err;
530}
531
532int snd_bebob_stream_init_duplex(struct snd_bebob *bebob)
533{
534 int err;
535
536 err = init_both_connections(bebob);
537 if (err < 0)
538 goto end;
539
5955815e
TS		 540 err = amdtp_am824_init(&bebob->tx_stream, bebob->unit,
541 AMDTP_IN_STREAM, CIP_BLOCKING);
eb7b3a05
TS		 542 if (err < 0) {
543 amdtp_stream_destroy(&bebob->tx_stream);
544 destroy_both_connections(bebob);
545 goto end;
546 }
b6bc8123
TS		 547 /* See comments in next function */
548 init_completion(&bebob->bus_reset);
549 bebob->tx_stream.flags |= CIP_SKIP_INIT_DBC_CHECK;
c4d860a0
TS		 550
551 /*
552 * BeBoB v3 transfers packets with these qurks:
553 * - In the beginning of streaming, the value of dbc is incremented
554 * even if no data blocks are transferred.
555 * - The value of dbc is reset suddenly.
556 */
557 if (bebob->version > 2)
558 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC |
559 CIP_SKIP_DBC_ZERO_CHECK;
560
9d59124c
TS		 561 /*
562 * At high sampling rate, M-Audio special firmware transmits empty
563 * packet with the value of dbc incremented by 8 but the others are
564 * valid to IEC 61883-1.
565 */
566 if (bebob->maudio_special_quirk)
567 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC;
eb7b3a05 568
5955815e
TS		 569 err = amdtp_am824_init(&bebob->rx_stream, bebob->unit,
570 AMDTP_OUT_STREAM, CIP_BLOCKING);
eb7b3a05
TS		 571 if (err < 0) {
572 amdtp_stream_destroy(&bebob->tx_stream);
573 amdtp_stream_destroy(&bebob->rx_stream);
574 destroy_both_connections(bebob);
575 }
576end:
577 return err;
578}
579
4a286d55 580int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate)
eb7b3a05 581{
1fc9522a 582 struct snd_bebob_rate_spec *rate_spec = bebob->spec->rate;
eb7b3a05 583 struct amdtp_stream *master, *slave;
eb7b3a05
TS		 584 enum cip_flags sync_mode;
585 unsigned int curr_rate;
b6bc8123 586 bool updated = false;
eb7b3a05
TS		 587 int err = 0;
588
b6bc8123
TS		 589 /*
590 * Normal BeBoB firmware has a quirk at bus reset to transmits packets
591 * with discontinuous value in dbc field.
592 *
593 * This 'struct completion' is used to call .update() at first to update
594 * connections/streams. Next following codes handle streaming error.
595 */
596 if (amdtp_streaming_error(&bebob->tx_stream)) {
597 if (completion_done(&bebob->bus_reset))
598 reinit_completion(&bebob->bus_reset);
599
600 updated = (wait_for_completion_interruptible_timeout(
601 &bebob->bus_reset,
602 msecs_to_jiffies(FW_ISO_RESOURCE_DELAY)) > 0);
603 }
604
eb7b3a05
TS		 605 mutex_lock(&bebob->mutex);
606
607 /* Need no substreams */
8d1c2694 608 if (atomic_read(&bebob->substreams_counter) == 0)
eb7b3a05
TS		 609 goto end;
610
611 err = get_sync_mode(bebob, &sync_mode);
612 if (err < 0)
613 goto end;
614 if (sync_mode == CIP_SYNC_TO_DEVICE) {
615 master = &bebob->tx_stream;
616 slave = &bebob->rx_stream;
eb7b3a05
TS		 617 } else {
618 master = &bebob->rx_stream;
619 slave = &bebob->tx_stream;
eb7b3a05
TS		 620 }
621
622 /*
623 * Considering JACK/FFADO streaming:
624 * TODO: This can be removed hwdep functionality becomes popular.
625 */
626 err = check_connection_used_by_others(bebob, master);
627 if (err < 0)
628 goto end;
629
b6bc8123
TS		 630 /*
631 * packet queueing error or detecting discontinuity
632 *
633 * At bus reset, connections should not be broken here. So streams need
634 * to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag.
635 */
636 if (amdtp_streaming_error(master))
eb7b3a05 637 amdtp_stream_stop(master);
eb7b3a05
TS		 638 if (amdtp_streaming_error(slave))
639 amdtp_stream_stop(slave);
b6bc8123
TS		 640 if (!updated &&
641 !amdtp_stream_running(master) && !amdtp_stream_running(slave))
642 break_both_connections(bebob);
eb7b3a05
TS		 643
644 /* stop streams if rate is different */
1fc9522a 645 err = rate_spec->get(bebob, &curr_rate);
eb7b3a05
TS		 646 if (err < 0) {
647 dev_err(&bebob->unit->device,
648 "fail to get sampling rate: %d\n", err);
649 goto end;
650 }
651 if (rate == 0)
652 rate = curr_rate;
653 if (rate != curr_rate) {
654 amdtp_stream_stop(master);
655 amdtp_stream_stop(slave);
656 break_both_connections(bebob);
657 }
658
659 /* master should be always running */
660 if (!amdtp_stream_running(master)) {
661 amdtp_stream_set_sync(sync_mode, master, slave);
662 bebob->master = master;
663
664 /*
665 * NOTE:
666 * If establishing connections at first, Yamaha GO46
667 * (and maybe Terratec X24) don't generate sound.
3149ac48
TS		 668 *
669 * For firmware customized by M-Audio, refer to next NOTE.
eb7b3a05 670 */
3149ac48
TS		 671 if (bebob->maudio_special_quirk == NULL) {
672 err = rate_spec->set(bebob, rate);
673 if (err < 0) {
674 dev_err(&bebob->unit->device,
675 "fail to set sampling rate: %d\n",
676 err);
677 goto end;
678 }
eb7b3a05
TS		 679 }
680
681 err = make_both_connections(bebob, rate);
682 if (err < 0)
683 goto end;
684
685 err = start_stream(bebob, master, rate);
686 if (err < 0) {
687 dev_err(&bebob->unit->device,
688 "fail to run AMDTP master stream:%d\n", err);
689 break_both_connections(bebob);
690 goto end;
691 }
692
3149ac48
TS		 693 /*
694 * NOTE:
695 * The firmware customized by M-Audio uses these commands to
696 * start transmitting stream. This is not usual way.
697 */
698 if (bebob->maudio_special_quirk != NULL) {
699 err = rate_spec->set(bebob, rate);
700 if (err < 0) {
701 dev_err(&bebob->unit->device,
702 "fail to ensure sampling rate: %d\n",
703 err);
704 amdtp_stream_stop(master);
705 break_both_connections(bebob);
706 goto end;
707 }
708 }
709
eb7b3a05
TS		 710 /* wait first callback */
711 if (!amdtp_stream_wait_callback(master, CALLBACK_TIMEOUT)) {
712 amdtp_stream_stop(master);
713 break_both_connections(bebob);
714 err = -ETIMEDOUT;
715 goto end;
716 }
717 }
718
719 /* start slave if needed */
8d1c2694 720 if (!amdtp_stream_running(slave)) {
eb7b3a05
TS		 721 err = start_stream(bebob, slave, rate);
722 if (err < 0) {
723 dev_err(&bebob->unit->device,
724 "fail to run AMDTP slave stream:%d\n", err);
725 amdtp_stream_stop(master);
726 break_both_connections(bebob);
727 goto end;
728 }
729
730 /* wait first callback */
731 if (!amdtp_stream_wait_callback(slave, CALLBACK_TIMEOUT)) {
732 amdtp_stream_stop(slave);
733 amdtp_stream_stop(master);
734 break_both_connections(bebob);
735 err = -ETIMEDOUT;
736 }
737 }
738end:
739 mutex_unlock(&bebob->mutex);
740 return err;
741}
742
743void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)
744{
745 struct amdtp_stream *master, *slave;
eb7b3a05 746
eb7b3a05
TS		 747 if (bebob->master == &bebob->rx_stream) {
748 slave = &bebob->tx_stream;
749 master = &bebob->rx_stream;
eb7b3a05
TS		 750 } else {
751 slave = &bebob->rx_stream;
752 master = &bebob->tx_stream;
eb7b3a05
TS		 753 }
754
c6e5e741
TS		 755 mutex_lock(&bebob->mutex);
756
8d1c2694
TS		 757 if (atomic_read(&bebob->substreams_counter) == 0) {
758 amdtp_stream_pcm_abort(master);
759 amdtp_stream_stop(master);
760
eb7b3a05
TS		 761 amdtp_stream_pcm_abort(slave);
762 amdtp_stream_stop(slave);
763
8d1c2694 764 break_both_connections(bebob);
eb7b3a05
TS		 765 }
766
767 mutex_unlock(&bebob->mutex);
768}
769
770void snd_bebob_stream_update_duplex(struct snd_bebob *bebob)
771{
772 /* vs. XRUN recovery due to discontinuity at bus reset */
773 mutex_lock(&bebob->mutex);
774
775 if ((cmp_connection_update(&bebob->in_conn) < 0) ||
776 (cmp_connection_update(&bebob->out_conn) < 0)) {
777 amdtp_stream_pcm_abort(&bebob->rx_stream);
778 amdtp_stream_pcm_abort(&bebob->tx_stream);
779 amdtp_stream_stop(&bebob->rx_stream);
780 amdtp_stream_stop(&bebob->tx_stream);
781 break_both_connections(bebob);
782 } else {
783 amdtp_stream_update(&bebob->rx_stream);
784 amdtp_stream_update(&bebob->tx_stream);
785 }
786
b6bc8123
TS		 787 /* wake up stream_start_duplex() */
788 if (!completion_done(&bebob->bus_reset))
789 complete_all(&bebob->bus_reset);
790
eb7b3a05
TS		 791 mutex_unlock(&bebob->mutex);
792}
793
d23c2cc4
TS		 794/*
795 * This function should be called before starting streams or after stopping
796 * streams.
797 */
eb7b3a05
TS		 798void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob)
799{
eb7b3a05
TS		 800 amdtp_stream_destroy(&bebob->rx_stream);
801 amdtp_stream_destroy(&bebob->tx_stream);
802
803 destroy_both_connections(bebob);
eb7b3a05
TS		 804}
805
806/*
807 * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’
808 * in Additional AVC commands (Nov 2003, BridgeCo)
809 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005
810 */
811static int
812parse_stream_formation(u8 *buf, unsigned int len,
813 struct snd_bebob_stream_formation *formation)
814{
815 unsigned int i, e, channels, format;
816
817 /*
818 * this module can support a hierarchy combination that:
819 * Root: Audio and Music (0x90)
820 * Level 1: AM824 Compound (0x40)
821 */
822 if ((buf[0] != 0x90) || (buf[1] != 0x40))
823 return -ENOSYS;
824
825 /* check sampling rate */
826 for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) {
827 if (buf[2] == bridgeco_freq_table[i])
828 break;
829 }
33a5f989 830 if (i == ARRAY_SIZE(bridgeco_freq_table))
eb7b3a05
TS		 831 return -ENOSYS;
832
833 /* Avoid double count by different entries for the same rate. */
834 memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation));
835
836 for (e = 0; e < buf[4]; e++) {
837 channels = buf[5 + e * 2];
838 format = buf[6 + e * 2];
839
840 switch (format) {
51fa31d4 841 /* IEC 60958 Conformant, currently handled as MBLA */
eb7b3a05
TS		 842 case 0x00:
843 /* Multi bit linear audio */
844 case 0x06: /* Raw */
845 formation[i].pcm += channels;
846 break;
847 /* MIDI Conformant */
848 case 0x0d:
849 formation[i].midi += channels;
850 break;
851 /* IEC 61937-3 to 7 */
852 case 0x01:
853 case 0x02:
854 case 0x03:
855 case 0x04:
856 case 0x05:
857 /* Multi bit linear audio */
858 case 0x07: /* DVD-Audio */
859 case 0x0c: /* High Precision */
860 /* One Bit Audio */
861 case 0x08: /* (Plain) Raw */
862 case 0x09: /* (Plain) SACD */
863 case 0x0a: /* (Encoded) Raw */
864 case 0x0b: /* (Encoded) SACD */
865 /* Synchronization Stream (Stereo Raw audio) */
866 case 0x40:
867 /* Don't care */
868 case 0xff:
869 default:
870 return -ENOSYS; /* not supported */
871 }
872 }
873
874 if (formation[i].pcm > AMDTP_MAX_CHANNELS_FOR_PCM ||
875 formation[i].midi > AMDTP_MAX_CHANNELS_FOR_MIDI)
876 return -ENOSYS;
877
878 return 0;
879}
880
881static int
882fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir,
883 unsigned short pid)
884{
885 u8 *buf;
886 struct snd_bebob_stream_formation *formations;
887 unsigned int len, eid;
888 u8 addr[AVC_BRIDGECO_ADDR_BYTES];
889 int err;
890
891 buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL);
892 if (buf == NULL)
893 return -ENOMEM;
894
895 if (dir == AVC_BRIDGECO_PLUG_DIR_IN)
896 formations = bebob->rx_stream_formations;
897 else
898 formations = bebob->tx_stream_formations;
899
900 for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) {
901 len = FORMAT_MAXIMUM_LENGTH;
902 avc_bridgeco_fill_unit_addr(addr, dir,
903 AVC_BRIDGECO_PLUG_UNIT_ISOC, pid);
904 err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf,
905 &len, eid);
906 /* No entries remained. */
907 if (err == -EINVAL && eid > 0) {
908 err = 0;
909 break;
910 } else if (err < 0) {
911 dev_err(&bebob->unit->device,
912 "fail to get stream format %d for isoc %s plug %d:%d\n",
913 eid,
914 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
915 "out",
916 pid, err);
917 break;
918 }
919
920 err = parse_stream_formation(buf, len, formations);
921 if (err < 0)
922 break;
923 }
924
925 kfree(buf);
926 return err;
927}
928
929static int
930seek_msu_sync_input_plug(struct snd_bebob *bebob)
931{
932 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
a6b598bf
TS		 933 unsigned int i;
934 enum avc_bridgeco_plug_type type;
eb7b3a05
TS		 935 int err;
936
937 /* Get the number of Music Sub Unit for both direction. */
938 err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs);
939 if (err < 0) {
940 dev_err(&bebob->unit->device,
941 "fail to get info for MSU in/out plugs: %d\n",
942 err);
943 goto end;
944 }
945
946 /* seek destination plugs for 'MSU sync input' */
947 bebob->sync_input_plug = -1;
948 for (i = 0; i < plugs[0]; i++) {
949 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 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 MSU in plug %d: %d\n",
954 i, err);
955 goto end;
956 }
957
958 if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) {
959 bebob->sync_input_plug = i;
960 break;
961 }
962 }
963end:
964 return err;
965}
966
967int snd_bebob_stream_discover(struct snd_bebob *bebob)
968{
1fc9522a 969 struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
eb7b3a05
TS		 970 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
971 enum avc_bridgeco_plug_type type;
972 unsigned int i;
973 int err;
974
975 /* the number of plugs for isoc in/out, ext in/out */
976 err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs);
977 if (err < 0) {
978 dev_err(&bebob->unit->device,
979 "fail to get info for isoc/external in/out plugs: %d\n",
980 err);
981 goto end;
982 }
983
984 /*
985 * This module supports at least one isoc input plug and one isoc
986 * output plug.
987 */
988 if ((plugs[0] == 0) || (plugs[1] == 0)) {
989 err = -ENOSYS;
990 goto end;
991 }
992
993 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
994 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
995 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
996 if (err < 0) {
997 dev_err(&bebob->unit->device,
998 "fail to get type for isoc in plug 0: %d\n", err);
999 goto end;
1000 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
1001 err = -ENOSYS;
1002 goto end;
1003 }
1004 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0);
1005 if (err < 0)
1006 goto end;
1007
1008 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
1009 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
1010 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
1011 if (err < 0) {
1012 dev_err(&bebob->unit->device,
1013 "fail to get type for isoc out plug 0: %d\n", err);
1014 goto end;
1015 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
1016 err = -ENOSYS;
1017 goto end;
1018 }
1019 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0);
1020 if (err < 0)
1021 goto end;
1022
1023 /* count external input plugs for MIDI */
1024 bebob->midi_input_ports = 0;
1025 for (i = 0; i < plugs[2]; i++) {
1026 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
1027 AVC_BRIDGECO_PLUG_UNIT_EXT, i);
1028 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
1029 if (err < 0) {
1030 dev_err(&bebob->unit->device,
1031 "fail to get type for external in plug %d: %d\n",
1032 i, err);
1033 goto end;
1034 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
1035 bebob->midi_input_ports++;
1036 }
1037 }
1038
1039 /* count external output plugs for MIDI */
1040 bebob->midi_output_ports = 0;
1041 for (i = 0; i < plugs[3]; i++) {
1042 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
1043 AVC_BRIDGECO_PLUG_UNIT_EXT, i);
1044 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
1045 if (err < 0) {
1046 dev_err(&bebob->unit->device,
1047 "fail to get type for external out plug %d: %d\n",
1048 i, err);
1049 goto end;
1050 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
1051 bebob->midi_output_ports++;
1052 }
1053 }
1054
1055 /* for check source of clock later */
1fc9522a
TS		 1056 if (!clk_spec)
1057 err = seek_msu_sync_input_plug(bebob);
eb7b3a05
TS		 1058end:
1059 return err;
1060}
618eabea
TS		 1061
1062void snd_bebob_stream_lock_changed(struct snd_bebob *bebob)
1063{
1064 bebob->dev_lock_changed = true;
1065 wake_up(&bebob->hwdep_wait);
1066}
1067
1068int snd_bebob_stream_lock_try(struct snd_bebob *bebob)
1069{
1070 int err;
1071
1072 spin_lock_irq(&bebob->lock);
1073
1074 /* user land lock this */
1075 if (bebob->dev_lock_count < 0) {
1076 err = -EBUSY;
1077 goto end;
1078 }
1079
1080 /* this is the first time */
1081 if (bebob->dev_lock_count++ == 0)
1082 snd_bebob_stream_lock_changed(bebob);
1083 err = 0;
1084end:
1085 spin_unlock_irq(&bebob->lock);
1086 return err;
1087}
1088
1089void snd_bebob_stream_lock_release(struct snd_bebob *bebob)
1090{
1091 spin_lock_irq(&bebob->lock);
1092
1093 if (WARN_ON(bebob->dev_lock_count <= 0))
1094 goto end;
1095 if (--bebob->dev_lock_count == 0)
1096 snd_bebob_stream_lock_changed(bebob);
1097end:
1098 spin_unlock_irq(&bebob->lock);
1099}
Linux 6.x block layer and io_uring tree(s)