1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * bebob_stream.c - a part of driver for BeBoB based devices |
4 | * |
5 | * Copyright (c) 2013-2014 Takashi Sakamoto |
6 | */ |
7 | |
8 | #include "./bebob.h" |
9 | |
10 | #define READY_TIMEOUT_MS 4000 |
11 | |
12 | /* |
13 | * NOTE; |
14 | * For BeBoB streams, Both of input and output CMP connection are important. |
15 | * |
16 | * For most devices, each CMP connection starts to transmit/receive a |
17 | * corresponding stream. But for a few devices, both of CMP connection needs |
18 | * to start transmitting stream. An example is 'M-Audio Firewire 410'. |
19 | */ |
20 | |
21 | /* 128 is an arbitrary length but it seems to be enough */ |
22 | #define FORMAT_MAXIMUM_LENGTH 128 |
23 | |
24 | const unsigned int snd_bebob_rate_table[SND_BEBOB_STRM_FMT_ENTRIES] = { |
25 | [0] = 32000, |
26 | [1] = 44100, |
27 | [2] = 48000, |
28 | [3] = 88200, |
29 | [4] = 96000, |
30 | [5] = 176400, |
31 | [6] = 192000, |
32 | }; |
33 | |
34 | /* |
35 | * See: Table 51: Extended Stream Format Info ‘Sampling Frequency’ |
36 | * in Additional AVC commands (Nov 2003, BridgeCo) |
37 | */ |
38 | static const unsigned int bridgeco_freq_table[] = { |
39 | [0] = 0x02, |
40 | [1] = 0x03, |
41 | [2] = 0x04, |
42 | [3] = 0x0a, |
43 | [4] = 0x05, |
44 | [5] = 0x06, |
45 | [6] = 0x07, |
46 | }; |
47 | |
48 | static int |
49 | get_formation_index(unsigned int rate, unsigned int *index) |
50 | { |
51 | unsigned int i; |
52 | |
53 | for (i = 0; i < ARRAY_SIZE(snd_bebob_rate_table); i++) { |
54 | if (snd_bebob_rate_table[i] == rate) { |
55 | *index = i; |
56 | return 0; |
57 | } |
58 | } |
59 | return -EINVAL; |
60 | } |
61 | |
62 | int |
63 | snd_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(unit: bebob->unit, rate: &tx_rate, |
71 | dir: AVC_GENERAL_PLUG_DIR_OUT, plug: 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(unit: bebob->unit, rate: &rx_rate, |
79 | dir: AVC_GENERAL_PLUG_DIR_IN, plug: 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(unit: bebob->unit, rate: rx_rate, |
90 | dir: AVC_GENERAL_PLUG_DIR_IN, plug: 0); |
91 | end: |
92 | return err; |
93 | } |
94 | |
95 | int |
96 | snd_bebob_stream_set_rate(struct snd_bebob *bebob, unsigned int rate) |
97 | { |
98 | int err; |
99 | |
100 | err = avc_general_set_sig_fmt(unit: bebob->unit, rate, |
101 | dir: AVC_GENERAL_PLUG_DIR_OUT, plug: 0); |
102 | if (err < 0) |
103 | goto end; |
104 | |
105 | err = avc_general_set_sig_fmt(unit: bebob->unit, rate, |
106 | dir: AVC_GENERAL_PLUG_DIR_IN, plug: 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(msecs: 300); |
115 | end: |
116 | return err; |
117 | } |
118 | |
119 | int snd_bebob_stream_get_clock_src(struct snd_bebob *bebob, |
120 | enum snd_bebob_clock_type *src) |
121 | { |
122 | const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; |
123 | u8 addr[AVC_BRIDGECO_ADDR_BYTES], input[7]; |
124 | unsigned int id; |
125 | enum avc_bridgeco_plug_type type; |
126 | int err = 0; |
127 | |
128 | /* 1.The device has its own operation to switch source of clock */ |
129 | if (clk_spec) { |
130 | err = clk_spec->get(bebob, &id); |
131 | if (err < 0) { |
132 | dev_err(&bebob->unit->device, |
133 | "fail to get clock source: %d\n" , err); |
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 | |
145 | *src = clk_spec->types[id]; |
146 | goto end; |
147 | } |
148 | |
149 | /* |
150 | * 2.The device don't support to switch source of clock then assumed |
151 | * to use internal clock always |
152 | */ |
153 | if (bebob->sync_input_plug < 0) { |
154 | *src = SND_BEBOB_CLOCK_TYPE_INTERNAL; |
155 | goto end; |
156 | } |
157 | |
158 | /* |
159 | * 3.The device supports to switch source of clock by an usual way. |
160 | * Let's check input for 'Music Sub Unit Sync Input' plug. |
161 | */ |
162 | avc_bridgeco_fill_msu_addr(buf: addr, dir: AVC_BRIDGECO_PLUG_DIR_IN, |
163 | pid: bebob->sync_input_plug); |
164 | err = avc_bridgeco_get_plug_input(unit: 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) { |
177 | *src = SND_BEBOB_CLOCK_TYPE_INTERNAL; |
178 | goto end; |
179 | } |
180 | |
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) { |
190 | *src = SND_BEBOB_CLOCK_TYPE_INTERNAL; |
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 | */ |
204 | *src = SND_BEBOB_CLOCK_TYPE_SYT; |
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 | */ |
212 | *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL; |
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(buf: addr, |
218 | dir: AVC_BRIDGECO_PLUG_DIR_IN, |
219 | unit: AVC_BRIDGECO_PLUG_UNIT_EXT, |
220 | pid: input[3]); |
221 | err = avc_bridgeco_get_plug_type(unit: bebob->unit, addr, |
222 | type: &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 | */ |
231 | *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL; |
232 | goto end; |
233 | } else if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) { |
234 | /* Often word clock. */ |
235 | *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL; |
236 | goto end; |
237 | } else if (type == AVC_BRIDGECO_PLUG_TYPE_ADDITION) { |
238 | /* |
239 | * Not standard. |
240 | * Mostly, additional internal clock. |
241 | */ |
242 | *src = SND_BEBOB_CLOCK_TYPE_INTERNAL; |
243 | goto end; |
244 | } |
245 | } |
246 | } |
247 | |
248 | /* Not supported. */ |
249 | err = -EIO; |
250 | end: |
251 | return err; |
252 | } |
253 | |
254 | static int map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s) |
255 | { |
256 | unsigned int sec, sections, ch, channels; |
257 | unsigned int pcm, midi, location; |
258 | unsigned int stm_pos, sec_loc, pos; |
259 | u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type; |
260 | enum avc_bridgeco_plug_dir dir; |
261 | int err; |
262 | |
263 | /* |
264 | * The length of return value of this command cannot be expected. Here |
265 | * use the maximum length of FCP. |
266 | */ |
267 | buf = kzalloc(size: 256, GFP_KERNEL); |
268 | if (buf == NULL) |
269 | return -ENOMEM; |
270 | |
271 | if (s == &bebob->tx_stream) |
272 | dir = AVC_BRIDGECO_PLUG_DIR_OUT; |
273 | else |
274 | dir = AVC_BRIDGECO_PLUG_DIR_IN; |
275 | |
276 | avc_bridgeco_fill_unit_addr(buf: addr, dir, unit: AVC_BRIDGECO_PLUG_UNIT_ISOC, pid: 0); |
277 | err = avc_bridgeco_get_plug_ch_pos(unit: bebob->unit, addr, buf, len: 256); |
278 | if (err < 0) { |
279 | dev_err(&bebob->unit->device, |
280 | "fail to get channel position for isoc %s plug 0: %d\n" , |
281 | (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out" , |
282 | err); |
283 | goto end; |
284 | } |
285 | pos = 0; |
286 | |
287 | /* positions in I/O buffer */ |
288 | pcm = 0; |
289 | midi = 0; |
290 | |
291 | /* the number of sections in AMDTP packet */ |
292 | sections = buf[pos++]; |
293 | |
294 | for (sec = 0; sec < sections; sec++) { |
295 | /* type of this section */ |
296 | avc_bridgeco_fill_unit_addr(buf: addr, dir, |
297 | unit: AVC_BRIDGECO_PLUG_UNIT_ISOC, pid: 0); |
298 | err = avc_bridgeco_get_plug_section_type(unit: bebob->unit, addr, |
299 | id: sec, type: &type); |
300 | if (err < 0) { |
301 | dev_err(&bebob->unit->device, |
302 | "fail to get section type for isoc %s plug 0: %d\n" , |
303 | (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : |
304 | "out" , |
305 | err); |
306 | goto end; |
307 | } |
308 | /* NoType */ |
309 | if (type == 0xff) { |
310 | err = -ENOSYS; |
311 | goto end; |
312 | } |
313 | |
314 | /* the number of channels in this section */ |
315 | channels = buf[pos++]; |
316 | |
317 | for (ch = 0; ch < channels; ch++) { |
318 | /* position of this channel in AMDTP packet */ |
319 | stm_pos = buf[pos++] - 1; |
320 | /* location of this channel in this section */ |
321 | sec_loc = buf[pos++] - 1; |
322 | |
323 | /* |
324 | * Basically the number of location is within the |
325 | * number of channels in this section. But some models |
326 | * of M-Audio don't follow this. Its location for MIDI |
327 | * is the position of MIDI channels in AMDTP packet. |
328 | */ |
329 | if (sec_loc >= channels) |
330 | sec_loc = ch; |
331 | |
332 | switch (type) { |
333 | /* for MIDI conformant data channel */ |
334 | case 0x0a: |
335 | /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */ |
336 | if ((midi > 0) && (stm_pos != midi)) { |
337 | err = -ENOSYS; |
338 | goto end; |
339 | } |
340 | amdtp_am824_set_midi_position(s, position: stm_pos); |
341 | midi = stm_pos; |
342 | break; |
343 | /* for PCM data channel */ |
344 | case 0x01: /* Headphone */ |
345 | case 0x02: /* Microphone */ |
346 | case 0x03: /* Line */ |
347 | case 0x04: /* SPDIF */ |
348 | case 0x05: /* ADAT */ |
349 | case 0x06: /* TDIF */ |
350 | case 0x07: /* MADI */ |
351 | /* for undefined/changeable signal */ |
352 | case 0x08: /* Analog */ |
353 | case 0x09: /* Digital */ |
354 | default: |
355 | location = pcm + sec_loc; |
356 | if (location >= AM824_MAX_CHANNELS_FOR_PCM) { |
357 | err = -ENOSYS; |
358 | goto end; |
359 | } |
360 | amdtp_am824_set_pcm_position(s, index: location, |
361 | position: stm_pos); |
362 | break; |
363 | } |
364 | } |
365 | |
366 | if (type != 0x0a) |
367 | pcm += channels; |
368 | else |
369 | midi += channels; |
370 | } |
371 | end: |
372 | kfree(objp: buf); |
373 | return err; |
374 | } |
375 | |
376 | static int |
377 | check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s) |
378 | { |
379 | struct cmp_connection *conn; |
380 | bool used; |
381 | int err; |
382 | |
383 | if (s == &bebob->tx_stream) |
384 | conn = &bebob->out_conn; |
385 | else |
386 | conn = &bebob->in_conn; |
387 | |
388 | err = cmp_connection_check_used(connection: conn, used: &used); |
389 | if ((err >= 0) && used && !amdtp_stream_running(s)) { |
390 | dev_err(&bebob->unit->device, |
391 | "Connection established by others: %cPCR[%d]\n" , |
392 | (conn->direction == CMP_OUTPUT) ? 'o' : 'i', |
393 | conn->pcr_index); |
394 | err = -EBUSY; |
395 | } |
396 | |
397 | return err; |
398 | } |
399 | |
400 | static void break_both_connections(struct snd_bebob *bebob) |
401 | { |
402 | cmp_connection_break(connection: &bebob->in_conn); |
403 | cmp_connection_break(connection: &bebob->out_conn); |
404 | } |
405 | |
406 | static int start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) |
407 | { |
408 | struct cmp_connection *conn; |
409 | int err = 0; |
410 | |
411 | if (stream == &bebob->rx_stream) |
412 | conn = &bebob->in_conn; |
413 | else |
414 | conn = &bebob->out_conn; |
415 | |
416 | // channel mapping. |
417 | if (bebob->maudio_special_quirk == NULL) { |
418 | err = map_data_channels(bebob, s: stream); |
419 | if (err < 0) |
420 | return err; |
421 | } |
422 | |
423 | err = cmp_connection_establish(connection: conn); |
424 | if (err < 0) |
425 | return err; |
426 | |
427 | return amdtp_domain_add_stream(d: &bebob->domain, s: stream, |
428 | channel: conn->resources.channel, speed: conn->speed); |
429 | } |
430 | |
431 | static int init_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) |
432 | { |
433 | unsigned int flags = CIP_BLOCKING; |
434 | enum amdtp_stream_direction dir_stream; |
435 | struct cmp_connection *conn; |
436 | enum cmp_direction dir_conn; |
437 | int err; |
438 | |
439 | if (stream == &bebob->tx_stream) { |
440 | dir_stream = AMDTP_IN_STREAM; |
441 | conn = &bebob->out_conn; |
442 | dir_conn = CMP_OUTPUT; |
443 | } else { |
444 | dir_stream = AMDTP_OUT_STREAM; |
445 | conn = &bebob->in_conn; |
446 | dir_conn = CMP_INPUT; |
447 | } |
448 | |
449 | if (stream == &bebob->tx_stream) { |
450 | if (bebob->quirks & SND_BEBOB_QUIRK_WRONG_DBC) |
451 | flags |= CIP_EMPTY_HAS_WRONG_DBC; |
452 | } |
453 | |
454 | err = cmp_connection_init(connection: conn, unit: bebob->unit, direction: dir_conn, pcr_index: 0); |
455 | if (err < 0) |
456 | return err; |
457 | |
458 | err = amdtp_am824_init(s: stream, unit: bebob->unit, dir: dir_stream, flags); |
459 | if (err < 0) { |
460 | cmp_connection_destroy(connection: conn); |
461 | return err; |
462 | } |
463 | |
464 | return 0; |
465 | } |
466 | |
467 | static void destroy_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) |
468 | { |
469 | amdtp_stream_destroy(s: stream); |
470 | |
471 | if (stream == &bebob->tx_stream) |
472 | cmp_connection_destroy(connection: &bebob->out_conn); |
473 | else |
474 | cmp_connection_destroy(connection: &bebob->in_conn); |
475 | } |
476 | |
477 | int snd_bebob_stream_init_duplex(struct snd_bebob *bebob) |
478 | { |
479 | int err; |
480 | |
481 | err = init_stream(bebob, stream: &bebob->tx_stream); |
482 | if (err < 0) |
483 | return err; |
484 | |
485 | err = init_stream(bebob, stream: &bebob->rx_stream); |
486 | if (err < 0) { |
487 | destroy_stream(bebob, stream: &bebob->tx_stream); |
488 | return err; |
489 | } |
490 | |
491 | err = amdtp_domain_init(d: &bebob->domain); |
492 | if (err < 0) { |
493 | destroy_stream(bebob, stream: &bebob->tx_stream); |
494 | destroy_stream(bebob, stream: &bebob->rx_stream); |
495 | } |
496 | |
497 | return err; |
498 | } |
499 | |
500 | static int keep_resources(struct snd_bebob *bebob, struct amdtp_stream *stream, |
501 | unsigned int rate, unsigned int index) |
502 | { |
503 | unsigned int pcm_channels; |
504 | unsigned int midi_ports; |
505 | struct cmp_connection *conn; |
506 | int err; |
507 | |
508 | if (stream == &bebob->tx_stream) { |
509 | pcm_channels = bebob->tx_stream_formations[index].pcm; |
510 | midi_ports = bebob->midi_input_ports; |
511 | conn = &bebob->out_conn; |
512 | } else { |
513 | pcm_channels = bebob->rx_stream_formations[index].pcm; |
514 | midi_ports = bebob->midi_output_ports; |
515 | conn = &bebob->in_conn; |
516 | } |
517 | |
518 | err = amdtp_am824_set_parameters(s: stream, rate, pcm_channels, midi_ports, double_pcm_frames: false); |
519 | if (err < 0) |
520 | return err; |
521 | |
522 | return cmp_connection_reserve(connection: conn, max_payload: amdtp_stream_get_max_payload(s: stream)); |
523 | } |
524 | |
525 | int snd_bebob_stream_reserve_duplex(struct snd_bebob *bebob, unsigned int rate, |
526 | unsigned int frames_per_period, |
527 | unsigned int frames_per_buffer) |
528 | { |
529 | unsigned int curr_rate; |
530 | int err; |
531 | |
532 | // Considering JACK/FFADO streaming: |
533 | // TODO: This can be removed hwdep functionality becomes popular. |
534 | err = check_connection_used_by_others(bebob, s: &bebob->rx_stream); |
535 | if (err < 0) |
536 | return err; |
537 | |
538 | err = bebob->spec->rate->get(bebob, &curr_rate); |
539 | if (err < 0) |
540 | return err; |
541 | if (rate == 0) |
542 | rate = curr_rate; |
543 | if (curr_rate != rate) { |
544 | amdtp_domain_stop(d: &bebob->domain); |
545 | break_both_connections(bebob); |
546 | |
547 | cmp_connection_release(connection: &bebob->out_conn); |
548 | cmp_connection_release(connection: &bebob->in_conn); |
549 | } |
550 | |
551 | if (bebob->substreams_counter == 0 || curr_rate != rate) { |
552 | unsigned int index; |
553 | |
554 | // NOTE: |
555 | // If establishing connections at first, Yamaha GO46 |
556 | // (and maybe Terratec X24) don't generate sound. |
557 | // |
558 | // For firmware customized by M-Audio, refer to next NOTE. |
559 | err = bebob->spec->rate->set(bebob, rate); |
560 | if (err < 0) { |
561 | dev_err(&bebob->unit->device, |
562 | "fail to set sampling rate: %d\n" , |
563 | err); |
564 | return err; |
565 | } |
566 | |
567 | err = get_formation_index(rate, index: &index); |
568 | if (err < 0) |
569 | return err; |
570 | |
571 | err = keep_resources(bebob, stream: &bebob->tx_stream, rate, index); |
572 | if (err < 0) |
573 | return err; |
574 | |
575 | err = keep_resources(bebob, stream: &bebob->rx_stream, rate, index); |
576 | if (err < 0) { |
577 | cmp_connection_release(connection: &bebob->out_conn); |
578 | return err; |
579 | } |
580 | |
581 | err = amdtp_domain_set_events_per_period(d: &bebob->domain, |
582 | events_per_period: frames_per_period, events_per_buffer: frames_per_buffer); |
583 | if (err < 0) { |
584 | cmp_connection_release(connection: &bebob->out_conn); |
585 | cmp_connection_release(connection: &bebob->in_conn); |
586 | return err; |
587 | } |
588 | } |
589 | |
590 | return 0; |
591 | } |
592 | |
593 | int snd_bebob_stream_start_duplex(struct snd_bebob *bebob) |
594 | { |
595 | int err; |
596 | |
597 | // Need no substreams. |
598 | if (bebob->substreams_counter == 0) |
599 | return -EIO; |
600 | |
601 | // packet queueing error or detecting discontinuity |
602 | if (amdtp_streaming_error(s: &bebob->rx_stream) || |
603 | amdtp_streaming_error(s: &bebob->tx_stream)) { |
604 | amdtp_domain_stop(d: &bebob->domain); |
605 | break_both_connections(bebob); |
606 | } |
607 | |
608 | if (!amdtp_stream_running(s: &bebob->rx_stream)) { |
609 | enum snd_bebob_clock_type src; |
610 | unsigned int curr_rate; |
611 | unsigned int tx_init_skip_cycles; |
612 | |
613 | if (bebob->maudio_special_quirk) { |
614 | err = bebob->spec->rate->get(bebob, &curr_rate); |
615 | if (err < 0) |
616 | return err; |
617 | } |
618 | |
619 | err = snd_bebob_stream_get_clock_src(bebob, src: &src); |
620 | if (err < 0) |
621 | return err; |
622 | |
623 | err = start_stream(bebob, stream: &bebob->rx_stream); |
624 | if (err < 0) |
625 | goto error; |
626 | |
627 | err = start_stream(bebob, stream: &bebob->tx_stream); |
628 | if (err < 0) |
629 | goto error; |
630 | |
631 | if (!(bebob->quirks & SND_BEBOB_QUIRK_INITIAL_DISCONTINUOUS_DBC)) |
632 | tx_init_skip_cycles = 0; |
633 | else |
634 | tx_init_skip_cycles = 16000; |
635 | |
636 | // MEMO: Some devices start packet transmission long enough after establishment of |
637 | // CMP connection. In the early stage of packet streaming, any device transfers |
638 | // NODATA packets. After several hundred cycles, it begins to multiplex event into |
639 | // the packet with adequate value of syt field in CIP header. Some devices are |
640 | // strictly to generate any discontinuity in the sequence of tx packet when they |
641 | // receives inadequate sequence of value in syt field of CIP header. In the case, |
642 | // the request to break CMP connection is often corrupted, then any transaction |
643 | // results in unrecoverable error, sometimes generate bus-reset. |
644 | err = amdtp_domain_start(d: &bebob->domain, tx_init_skip_cycles, replay_seq: true, replay_on_the_fly: false); |
645 | if (err < 0) |
646 | goto error; |
647 | |
648 | // NOTE: |
649 | // The firmware customized by M-Audio uses these commands to |
650 | // start transmitting stream. This is not usual way. |
651 | if (bebob->maudio_special_quirk) { |
652 | err = bebob->spec->rate->set(bebob, curr_rate); |
653 | if (err < 0) { |
654 | dev_err(&bebob->unit->device, |
655 | "fail to ensure sampling rate: %d\n" , |
656 | err); |
657 | goto error; |
658 | } |
659 | } |
660 | |
661 | // Some devices postpone start of transmission mostly for 1 sec after receives |
662 | // packets firstly. |
663 | if (!amdtp_domain_wait_ready(d: &bebob->domain, READY_TIMEOUT_MS)) { |
664 | err = -ETIMEDOUT; |
665 | goto error; |
666 | } |
667 | } |
668 | |
669 | return 0; |
670 | error: |
671 | amdtp_domain_stop(d: &bebob->domain); |
672 | break_both_connections(bebob); |
673 | return err; |
674 | } |
675 | |
676 | void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob) |
677 | { |
678 | if (bebob->substreams_counter == 0) { |
679 | amdtp_domain_stop(d: &bebob->domain); |
680 | break_both_connections(bebob); |
681 | |
682 | cmp_connection_release(connection: &bebob->out_conn); |
683 | cmp_connection_release(connection: &bebob->in_conn); |
684 | } |
685 | } |
686 | |
687 | /* |
688 | * This function should be called before starting streams or after stopping |
689 | * streams. |
690 | */ |
691 | void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob) |
692 | { |
693 | amdtp_domain_destroy(d: &bebob->domain); |
694 | |
695 | destroy_stream(bebob, stream: &bebob->tx_stream); |
696 | destroy_stream(bebob, stream: &bebob->rx_stream); |
697 | } |
698 | |
699 | /* |
700 | * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’ |
701 | * in Additional AVC commands (Nov 2003, BridgeCo) |
702 | * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 |
703 | */ |
704 | static int |
705 | parse_stream_formation(u8 *buf, unsigned int len, |
706 | struct snd_bebob_stream_formation *formation) |
707 | { |
708 | unsigned int i, e, channels, format; |
709 | |
710 | /* |
711 | * this module can support a hierarchy combination that: |
712 | * Root: Audio and Music (0x90) |
713 | * Level 1: AM824 Compound (0x40) |
714 | */ |
715 | if ((buf[0] != 0x90) || (buf[1] != 0x40)) |
716 | return -ENOSYS; |
717 | |
718 | /* check sampling rate */ |
719 | for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) { |
720 | if (buf[2] == bridgeco_freq_table[i]) |
721 | break; |
722 | } |
723 | if (i == ARRAY_SIZE(bridgeco_freq_table)) |
724 | return -ENOSYS; |
725 | |
726 | /* Avoid double count by different entries for the same rate. */ |
727 | memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation)); |
728 | |
729 | for (e = 0; e < buf[4]; e++) { |
730 | channels = buf[5 + e * 2]; |
731 | format = buf[6 + e * 2]; |
732 | |
733 | switch (format) { |
734 | /* IEC 60958 Conformant, currently handled as MBLA */ |
735 | case 0x00: |
736 | /* Multi bit linear audio */ |
737 | case 0x06: /* Raw */ |
738 | formation[i].pcm += channels; |
739 | break; |
740 | /* MIDI Conformant */ |
741 | case 0x0d: |
742 | formation[i].midi += channels; |
743 | break; |
744 | /* IEC 61937-3 to 7 */ |
745 | case 0x01: |
746 | case 0x02: |
747 | case 0x03: |
748 | case 0x04: |
749 | case 0x05: |
750 | /* Multi bit linear audio */ |
751 | case 0x07: /* DVD-Audio */ |
752 | case 0x0c: /* High Precision */ |
753 | /* One Bit Audio */ |
754 | case 0x08: /* (Plain) Raw */ |
755 | case 0x09: /* (Plain) SACD */ |
756 | case 0x0a: /* (Encoded) Raw */ |
757 | case 0x0b: /* (Encoded) SACD */ |
758 | /* Synchronization Stream (Stereo Raw audio) */ |
759 | case 0x40: |
760 | /* Don't care */ |
761 | case 0xff: |
762 | default: |
763 | return -ENOSYS; /* not supported */ |
764 | } |
765 | } |
766 | |
767 | if (formation[i].pcm > AM824_MAX_CHANNELS_FOR_PCM || |
768 | formation[i].midi > AM824_MAX_CHANNELS_FOR_MIDI) |
769 | return -ENOSYS; |
770 | |
771 | return 0; |
772 | } |
773 | |
774 | static int fill_stream_formations(struct snd_bebob *bebob, u8 addr[AVC_BRIDGECO_ADDR_BYTES], |
775 | enum avc_bridgeco_plug_dir plug_dir, unsigned int plug_id, |
776 | struct snd_bebob_stream_formation *formations) |
777 | { |
778 | enum avc_bridgeco_plug_type plug_type; |
779 | u8 *buf; |
780 | unsigned int len, eid; |
781 | int err; |
782 | |
783 | avc_bridgeco_fill_unit_addr(buf: addr, dir: plug_dir, unit: AVC_BRIDGECO_PLUG_UNIT_ISOC, pid: plug_id); |
784 | |
785 | err = avc_bridgeco_get_plug_type(unit: bebob->unit, addr, type: &plug_type); |
786 | if (err < 0) { |
787 | dev_err(&bebob->unit->device, |
788 | "Fail to get type for isoc %d plug 0: %d\n" , plug_dir, err); |
789 | return err; |
790 | } else if (plug_type != AVC_BRIDGECO_PLUG_TYPE_ISOC) |
791 | return -ENXIO; |
792 | |
793 | buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL); |
794 | if (buf == NULL) |
795 | return -ENOMEM; |
796 | |
797 | for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; ++eid) { |
798 | avc_bridgeco_fill_unit_addr(buf: addr, dir: plug_dir, unit: AVC_BRIDGECO_PLUG_UNIT_ISOC, pid: plug_id); |
799 | |
800 | len = FORMAT_MAXIMUM_LENGTH; |
801 | err = avc_bridgeco_get_plug_strm_fmt(unit: bebob->unit, addr, buf, len: &len, eid); |
802 | // No entries remained. |
803 | if (err == -EINVAL && eid > 0) { |
804 | err = 0; |
805 | break; |
806 | } else if (err < 0) { |
807 | dev_err(&bebob->unit->device, |
808 | "fail to get stream format %d for isoc %d plug %d:%d\n" , |
809 | eid, plug_dir, plug_id, err); |
810 | break; |
811 | } |
812 | |
813 | err = parse_stream_formation(buf, len, formation: formations); |
814 | if (err < 0) |
815 | break; |
816 | } |
817 | |
818 | kfree(objp: buf); |
819 | return err; |
820 | } |
821 | |
822 | static int detect_midi_ports(struct snd_bebob *bebob, |
823 | const struct snd_bebob_stream_formation *formats, |
824 | u8 addr[AVC_BRIDGECO_ADDR_BYTES], enum avc_bridgeco_plug_dir plug_dir, |
825 | unsigned int plug_count, unsigned int *midi_ports) |
826 | { |
827 | int i; |
828 | int err = 0; |
829 | |
830 | *midi_ports = 0; |
831 | |
832 | /// Detect the number of available MIDI ports when packet has MIDI conformant data channel. |
833 | for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; ++i) { |
834 | if (formats[i].midi > 0) |
835 | break; |
836 | } |
837 | if (i >= SND_BEBOB_STRM_FMT_ENTRIES) |
838 | return 0; |
839 | |
840 | for (i = 0; i < plug_count; ++i) { |
841 | enum avc_bridgeco_plug_type plug_type; |
842 | unsigned int ch_count; |
843 | |
844 | avc_bridgeco_fill_unit_addr(buf: addr, dir: plug_dir, unit: AVC_BRIDGECO_PLUG_UNIT_EXT, pid: i); |
845 | |
846 | err = avc_bridgeco_get_plug_type(unit: bebob->unit, addr, type: &plug_type); |
847 | if (err < 0) { |
848 | dev_err(&bebob->unit->device, |
849 | "fail to get type for external %d plug %d: %d\n" , |
850 | plug_dir, i, err); |
851 | break; |
852 | } else if (plug_type != AVC_BRIDGECO_PLUG_TYPE_MIDI) { |
853 | continue; |
854 | } |
855 | |
856 | err = avc_bridgeco_get_plug_ch_count(unit: bebob->unit, addr, ch_count: &ch_count); |
857 | if (err < 0) |
858 | break; |
859 | // Yamaha GO44, GO46, Terratec Phase 24, Phase x24 reports 0 for the number of |
860 | // channels in external output plug 3 (MIDI type) even if it has a pair of physical |
861 | // MIDI jacks. As a workaround, assume it as one. |
862 | if (ch_count == 0) |
863 | ch_count = 1; |
864 | *midi_ports += ch_count; |
865 | } |
866 | |
867 | return err; |
868 | } |
869 | |
870 | static int |
871 | seek_msu_sync_input_plug(struct snd_bebob *bebob) |
872 | { |
873 | u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; |
874 | unsigned int i; |
875 | enum avc_bridgeco_plug_type type; |
876 | int err; |
877 | |
878 | /* Get the number of Music Sub Unit for both direction. */ |
879 | err = avc_general_get_plug_info(unit: bebob->unit, subunit_type: 0x0c, subunit_id: 0x00, subfunction: 0x00, info: plugs); |
880 | if (err < 0) { |
881 | dev_err(&bebob->unit->device, |
882 | "fail to get info for MSU in/out plugs: %d\n" , |
883 | err); |
884 | goto end; |
885 | } |
886 | |
887 | /* seek destination plugs for 'MSU sync input' */ |
888 | bebob->sync_input_plug = -1; |
889 | for (i = 0; i < plugs[0]; i++) { |
890 | avc_bridgeco_fill_msu_addr(buf: addr, dir: AVC_BRIDGECO_PLUG_DIR_IN, pid: i); |
891 | err = avc_bridgeco_get_plug_type(unit: bebob->unit, addr, type: &type); |
892 | if (err < 0) { |
893 | dev_err(&bebob->unit->device, |
894 | "fail to get type for MSU in plug %d: %d\n" , |
895 | i, err); |
896 | goto end; |
897 | } |
898 | |
899 | if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) { |
900 | bebob->sync_input_plug = i; |
901 | break; |
902 | } |
903 | } |
904 | end: |
905 | return err; |
906 | } |
907 | |
908 | int snd_bebob_stream_discover(struct snd_bebob *bebob) |
909 | { |
910 | const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; |
911 | u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; |
912 | int err; |
913 | |
914 | /* the number of plugs for isoc in/out, ext in/out */ |
915 | err = avc_general_get_plug_info(unit: bebob->unit, subunit_type: 0x1f, subunit_id: 0x07, subfunction: 0x00, info: plugs); |
916 | if (err < 0) { |
917 | dev_err(&bebob->unit->device, |
918 | "fail to get info for isoc/external in/out plugs: %d\n" , |
919 | err); |
920 | goto end; |
921 | } |
922 | |
923 | /* |
924 | * This module supports at least one isoc input plug and one isoc |
925 | * output plug. |
926 | */ |
927 | if ((plugs[0] == 0) || (plugs[1] == 0)) { |
928 | err = -ENOSYS; |
929 | goto end; |
930 | } |
931 | |
932 | err = fill_stream_formations(bebob, addr, plug_dir: AVC_BRIDGECO_PLUG_DIR_IN, plug_id: 0, |
933 | formations: bebob->rx_stream_formations); |
934 | if (err < 0) |
935 | goto end; |
936 | |
937 | err = fill_stream_formations(bebob, addr, plug_dir: AVC_BRIDGECO_PLUG_DIR_OUT, plug_id: 0, |
938 | formations: bebob->tx_stream_formations); |
939 | if (err < 0) |
940 | goto end; |
941 | |
942 | err = detect_midi_ports(bebob, formats: bebob->tx_stream_formations, addr, plug_dir: AVC_BRIDGECO_PLUG_DIR_IN, |
943 | plug_count: plugs[2], midi_ports: &bebob->midi_input_ports); |
944 | if (err < 0) |
945 | goto end; |
946 | |
947 | err = detect_midi_ports(bebob, formats: bebob->rx_stream_formations, addr, plug_dir: AVC_BRIDGECO_PLUG_DIR_OUT, |
948 | plug_count: plugs[3], midi_ports: &bebob->midi_output_ports); |
949 | if (err < 0) |
950 | goto end; |
951 | |
952 | /* for check source of clock later */ |
953 | if (!clk_spec) |
954 | err = seek_msu_sync_input_plug(bebob); |
955 | end: |
956 | return err; |
957 | } |
958 | |
959 | void snd_bebob_stream_lock_changed(struct snd_bebob *bebob) |
960 | { |
961 | bebob->dev_lock_changed = true; |
962 | wake_up(&bebob->hwdep_wait); |
963 | } |
964 | |
965 | int snd_bebob_stream_lock_try(struct snd_bebob *bebob) |
966 | { |
967 | int err; |
968 | |
969 | spin_lock_irq(lock: &bebob->lock); |
970 | |
971 | /* user land lock this */ |
972 | if (bebob->dev_lock_count < 0) { |
973 | err = -EBUSY; |
974 | goto end; |
975 | } |
976 | |
977 | /* this is the first time */ |
978 | if (bebob->dev_lock_count++ == 0) |
979 | snd_bebob_stream_lock_changed(bebob); |
980 | err = 0; |
981 | end: |
982 | spin_unlock_irq(lock: &bebob->lock); |
983 | return err; |
984 | } |
985 | |
986 | void snd_bebob_stream_lock_release(struct snd_bebob *bebob) |
987 | { |
988 | spin_lock_irq(lock: &bebob->lock); |
989 | |
990 | if (WARN_ON(bebob->dev_lock_count <= 0)) |
991 | goto end; |
992 | if (--bebob->dev_lock_count == 0) |
993 | snd_bebob_stream_lock_changed(bebob); |
994 | end: |
995 | spin_unlock_irq(lock: &bebob->lock); |
996 | } |
997 | |