Commit | Line | Data |
---|---|---|
e2786ca6 TS |
1 | /* |
2 | * oxfw_stream.c - a part of driver for OXFW970/971 based devices | |
3 | * | |
4 | * Copyright (c) 2014 Takashi Sakamoto | |
5 | * | |
6 | * Licensed under the terms of the GNU General Public License, version 2. | |
7 | */ | |
8 | ||
9 | #include "oxfw.h" | |
f3699e2c | 10 | #include <linux/delay.h> |
e2786ca6 | 11 | |
5cd1d3f4 | 12 | #define AVC_GENERIC_FRAME_MAXIMUM_BYTES 512 |
f3699e2c | 13 | #define CALLBACK_TIMEOUT 200 |
5cd1d3f4 TS |
14 | |
15 | /* | |
16 | * According to datasheet of Oxford Semiconductor: | |
17 | * OXFW970: 32.0/44.1/48.0/96.0 Khz, 8 audio channels I/O | |
18 | * OXFW971: 32.0/44.1/48.0/88.2/96.0/192.0 kHz, 16 audio channels I/O, MIDI I/O | |
19 | */ | |
20 | static const unsigned int oxfw_rate_table[] = { | |
21 | [0] = 32000, | |
22 | [1] = 44100, | |
23 | [2] = 48000, | |
24 | [3] = 88200, | |
25 | [4] = 96000, | |
26 | [5] = 192000, | |
27 | }; | |
28 | ||
29 | /* | |
30 | * See Table 5.7 – Sampling frequency for Multi-bit Audio | |
31 | * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) | |
32 | */ | |
33 | static const unsigned int avc_stream_rate_table[] = { | |
34 | [0] = 0x02, | |
35 | [1] = 0x03, | |
36 | [2] = 0x04, | |
37 | [3] = 0x0a, | |
38 | [4] = 0x05, | |
39 | [5] = 0x07, | |
40 | }; | |
41 | ||
b0ac0009 TS |
42 | static int set_rate(struct snd_oxfw *oxfw, unsigned int rate) |
43 | { | |
44 | int err; | |
45 | ||
46 | err = avc_general_set_sig_fmt(oxfw->unit, rate, | |
47 | AVC_GENERAL_PLUG_DIR_IN, 0); | |
48 | if (err < 0) | |
49 | goto end; | |
50 | ||
51 | if (oxfw->has_output) | |
52 | err = avc_general_set_sig_fmt(oxfw->unit, rate, | |
53 | AVC_GENERAL_PLUG_DIR_OUT, 0); | |
54 | end: | |
55 | return err; | |
56 | } | |
57 | ||
f3699e2c TS |
58 | static int set_stream_format(struct snd_oxfw *oxfw, struct amdtp_stream *s, |
59 | unsigned int rate, unsigned int pcm_channels) | |
60 | { | |
61 | u8 **formats; | |
62 | struct snd_oxfw_stream_formation formation; | |
63 | enum avc_general_plug_dir dir; | |
64 | unsigned int i, err, len; | |
65 | ||
b0ac0009 TS |
66 | if (s == &oxfw->tx_stream) { |
67 | formats = oxfw->tx_stream_formats; | |
68 | dir = AVC_GENERAL_PLUG_DIR_OUT; | |
69 | } else { | |
70 | formats = oxfw->rx_stream_formats; | |
71 | dir = AVC_GENERAL_PLUG_DIR_IN; | |
72 | } | |
f3699e2c TS |
73 | |
74 | /* Seek stream format for requirements. */ | |
75 | for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { | |
76 | err = snd_oxfw_stream_parse_format(formats[i], &formation); | |
77 | if (err < 0) | |
78 | return err; | |
79 | ||
80 | if ((formation.rate == rate) && (formation.pcm == pcm_channels)) | |
81 | break; | |
82 | } | |
83 | if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) | |
84 | return -EINVAL; | |
85 | ||
86 | /* If assumed, just change rate. */ | |
87 | if (oxfw->assumed) | |
b0ac0009 | 88 | return set_rate(oxfw, rate); |
f3699e2c TS |
89 | |
90 | /* Calculate format length. */ | |
91 | len = 5 + formats[i][4] * 2; | |
92 | ||
93 | err = avc_stream_set_format(oxfw->unit, dir, 0, formats[i], len); | |
94 | if (err < 0) | |
95 | return err; | |
96 | ||
97 | /* Some requests just after changing format causes freezing. */ | |
98 | msleep(100); | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
b0ac0009 | 103 | static void stop_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream) |
e2786ca6 | 104 | { |
b0ac0009 TS |
105 | amdtp_stream_pcm_abort(stream); |
106 | amdtp_stream_stop(stream); | |
e2786ca6 | 107 | |
b0ac0009 TS |
108 | if (stream == &oxfw->tx_stream) |
109 | cmp_connection_break(&oxfw->out_conn); | |
110 | else | |
111 | cmp_connection_break(&oxfw->in_conn); | |
e2786ca6 TS |
112 | } |
113 | ||
b0ac0009 TS |
114 | static int start_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream, |
115 | unsigned int rate, unsigned int pcm_channels) | |
e2786ca6 | 116 | { |
f3699e2c TS |
117 | u8 **formats; |
118 | struct cmp_connection *conn; | |
119 | struct snd_oxfw_stream_formation formation; | |
120 | unsigned int i, midi_ports; | |
f3699e2c | 121 | int err; |
e2786ca6 | 122 | |
b0ac0009 TS |
123 | if (stream == &oxfw->rx_stream) { |
124 | formats = oxfw->rx_stream_formats; | |
125 | conn = &oxfw->in_conn; | |
126 | } else { | |
127 | formats = oxfw->tx_stream_formats; | |
128 | conn = &oxfw->out_conn; | |
129 | } | |
f3699e2c | 130 | |
b0ac0009 | 131 | /* Get stream format */ |
f3699e2c TS |
132 | for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { |
133 | if (formats[i] == NULL) | |
134 | break; | |
135 | ||
136 | err = snd_oxfw_stream_parse_format(formats[i], &formation); | |
137 | if (err < 0) | |
138 | goto end; | |
139 | if (rate != formation.rate) | |
140 | continue; | |
141 | if (pcm_channels == 0 || pcm_channels == formation.pcm) | |
142 | break; | |
143 | } | |
144 | if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) { | |
145 | err = -EINVAL; | |
146 | goto end; | |
147 | } | |
148 | ||
149 | pcm_channels = formation.pcm; | |
150 | midi_ports = DIV_ROUND_UP(formation.midi, 8); | |
e2786ca6 | 151 | |
f3699e2c TS |
152 | /* The stream should have one pcm channels at least */ |
153 | if (pcm_channels == 0) { | |
154 | err = -EINVAL; | |
e2786ca6 | 155 | goto end; |
f3699e2c TS |
156 | } |
157 | amdtp_stream_set_parameters(stream, rate, pcm_channels, midi_ports); | |
e2786ca6 | 158 | |
f3699e2c TS |
159 | err = cmp_connection_establish(conn, |
160 | amdtp_stream_get_max_payload(stream)); | |
e2786ca6 TS |
161 | if (err < 0) |
162 | goto end; | |
163 | ||
f3699e2c TS |
164 | err = amdtp_stream_start(stream, |
165 | conn->resources.channel, | |
166 | conn->speed); | |
167 | if (err < 0) { | |
168 | cmp_connection_break(conn); | |
169 | goto end; | |
170 | } | |
171 | ||
172 | /* Wait first packet */ | |
173 | err = amdtp_stream_wait_callback(stream, CALLBACK_TIMEOUT); | |
174 | if (err < 0) | |
b0ac0009 | 175 | stop_stream(oxfw, stream); |
f3699e2c TS |
176 | end: |
177 | return err; | |
178 | } | |
179 | ||
b0ac0009 TS |
180 | static int check_connection_used_by_others(struct snd_oxfw *oxfw, |
181 | struct amdtp_stream *stream) | |
f3699e2c | 182 | { |
b0ac0009 TS |
183 | struct cmp_connection *conn; |
184 | bool used; | |
185 | int err; | |
186 | ||
187 | if (stream == &oxfw->tx_stream) | |
188 | conn = &oxfw->out_conn; | |
189 | else | |
190 | conn = &oxfw->in_conn; | |
191 | ||
192 | err = cmp_connection_check_used(conn, &used); | |
193 | if ((err >= 0) && used && !amdtp_stream_running(stream)) { | |
194 | dev_err(&oxfw->unit->device, | |
195 | "Connection established by others: %cPCR[%d]\n", | |
196 | (conn->direction == CMP_OUTPUT) ? 'o' : 'i', | |
197 | conn->pcr_index); | |
198 | err = -EBUSY; | |
199 | } | |
200 | ||
201 | return err; | |
202 | } | |
203 | ||
204 | int snd_oxfw_stream_init_simplex(struct snd_oxfw *oxfw, | |
205 | struct amdtp_stream *stream) | |
206 | { | |
207 | struct cmp_connection *conn; | |
208 | enum cmp_direction c_dir; | |
209 | enum amdtp_stream_direction s_dir; | |
210 | int err; | |
211 | ||
212 | if (stream == &oxfw->tx_stream) { | |
213 | conn = &oxfw->out_conn; | |
214 | c_dir = CMP_OUTPUT; | |
215 | s_dir = AMDTP_IN_STREAM; | |
216 | } else { | |
217 | conn = &oxfw->in_conn; | |
218 | c_dir = CMP_INPUT; | |
219 | s_dir = AMDTP_OUT_STREAM; | |
220 | } | |
221 | ||
222 | err = cmp_connection_init(conn, oxfw->unit, c_dir, 0); | |
223 | if (err < 0) | |
224 | goto end; | |
225 | ||
226 | err = amdtp_stream_init(stream, oxfw->unit, s_dir, CIP_NONBLOCKING); | |
227 | if (err < 0) { | |
228 | amdtp_stream_destroy(stream); | |
229 | cmp_connection_destroy(conn); | |
230 | goto end; | |
231 | } | |
232 | ||
233 | /* OXFW starts to transmit packets with non-zero dbc. */ | |
234 | if (stream == &oxfw->tx_stream) | |
235 | oxfw->tx_stream.flags |= CIP_SKIP_INIT_DBC_CHECK; | |
236 | end: | |
237 | return err; | |
238 | } | |
239 | ||
240 | int snd_oxfw_stream_start_simplex(struct snd_oxfw *oxfw, | |
241 | struct amdtp_stream *stream, | |
242 | unsigned int rate, unsigned int pcm_channels) | |
243 | { | |
244 | struct amdtp_stream *opposite; | |
f3699e2c | 245 | struct snd_oxfw_stream_formation formation; |
b0ac0009 TS |
246 | enum avc_general_plug_dir dir; |
247 | unsigned int substreams, opposite_substreams; | |
f3699e2c TS |
248 | int err = 0; |
249 | ||
b0ac0009 TS |
250 | if (stream == &oxfw->tx_stream) { |
251 | substreams = oxfw->capture_substreams; | |
252 | opposite = &oxfw->rx_stream; | |
253 | opposite_substreams = oxfw->playback_substreams; | |
254 | dir = AVC_GENERAL_PLUG_DIR_OUT; | |
255 | } else { | |
256 | substreams = oxfw->playback_substreams; | |
257 | opposite_substreams = oxfw->capture_substreams; | |
258 | ||
259 | if (oxfw->has_output) | |
260 | opposite = &oxfw->rx_stream; | |
261 | else | |
262 | opposite = NULL; | |
263 | ||
264 | dir = AVC_GENERAL_PLUG_DIR_IN; | |
265 | } | |
266 | ||
267 | if (substreams == 0) | |
268 | goto end; | |
269 | ||
270 | /* | |
271 | * Considering JACK/FFADO streaming: | |
272 | * TODO: This can be removed hwdep functionality becomes popular. | |
273 | */ | |
274 | err = check_connection_used_by_others(oxfw, stream); | |
275 | if (err < 0) | |
276 | goto end; | |
277 | ||
f3699e2c | 278 | /* packet queueing error */ |
b0ac0009 TS |
279 | if (amdtp_streaming_error(stream)) |
280 | stop_stream(oxfw, stream); | |
f3699e2c | 281 | |
b0ac0009 | 282 | err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); |
e2786ca6 | 283 | if (err < 0) |
f3699e2c | 284 | goto end; |
05588d34 TS |
285 | if (rate == 0) |
286 | rate = formation.rate; | |
287 | if (pcm_channels == 0) | |
288 | pcm_channels = formation.pcm; | |
f3699e2c TS |
289 | |
290 | if ((formation.rate != rate) || (formation.pcm != pcm_channels)) { | |
b0ac0009 TS |
291 | if (opposite != NULL) { |
292 | err = check_connection_used_by_others(oxfw, opposite); | |
293 | if (err < 0) | |
294 | goto end; | |
295 | stop_stream(oxfw, opposite); | |
296 | } | |
297 | stop_stream(oxfw, stream); | |
f3699e2c | 298 | |
b0ac0009 | 299 | err = set_stream_format(oxfw, stream, rate, pcm_channels); |
f3699e2c TS |
300 | if (err < 0) { |
301 | dev_err(&oxfw->unit->device, | |
302 | "fail to set stream format: %d\n", err); | |
303 | goto end; | |
304 | } | |
b0ac0009 TS |
305 | |
306 | /* Start opposite stream if needed. */ | |
307 | if (opposite && !amdtp_stream_running(opposite) && | |
308 | (opposite_substreams > 0)) { | |
309 | err = start_stream(oxfw, opposite, rate, 0); | |
310 | if (err < 0) { | |
311 | dev_err(&oxfw->unit->device, | |
312 | "fail to restart stream: %d\n", err); | |
313 | goto end; | |
314 | } | |
315 | } | |
f3699e2c TS |
316 | } |
317 | ||
b0ac0009 TS |
318 | /* Start requested stream. */ |
319 | if (!amdtp_stream_running(stream)) { | |
320 | err = start_stream(oxfw, stream, rate, pcm_channels); | |
321 | if (err < 0) | |
322 | dev_err(&oxfw->unit->device, | |
323 | "fail to start stream: %d\n", err); | |
324 | } | |
e2786ca6 TS |
325 | end: |
326 | return err; | |
327 | } | |
328 | ||
b0ac0009 TS |
329 | void snd_oxfw_stream_stop_simplex(struct snd_oxfw *oxfw, |
330 | struct amdtp_stream *stream) | |
e2786ca6 | 331 | { |
b0ac0009 TS |
332 | if (((stream == &oxfw->tx_stream) && (oxfw->capture_substreams > 0)) || |
333 | ((stream == &oxfw->rx_stream) && (oxfw->playback_substreams > 0))) | |
334 | return; | |
335 | ||
336 | stop_stream(oxfw, stream); | |
e2786ca6 TS |
337 | } |
338 | ||
b0ac0009 TS |
339 | void snd_oxfw_stream_destroy_simplex(struct snd_oxfw *oxfw, |
340 | struct amdtp_stream *stream) | |
e2786ca6 | 341 | { |
b0ac0009 TS |
342 | struct cmp_connection *conn; |
343 | ||
344 | if (stream == &oxfw->tx_stream) | |
345 | conn = &oxfw->out_conn; | |
346 | else | |
347 | conn = &oxfw->in_conn; | |
e2786ca6 | 348 | |
b0ac0009 TS |
349 | stop_stream(oxfw, stream); |
350 | ||
351 | amdtp_stream_destroy(stream); | |
352 | cmp_connection_destroy(conn); | |
e2786ca6 TS |
353 | } |
354 | ||
b0ac0009 TS |
355 | void snd_oxfw_stream_update_simplex(struct snd_oxfw *oxfw, |
356 | struct amdtp_stream *stream) | |
e2786ca6 | 357 | { |
b0ac0009 TS |
358 | struct cmp_connection *conn; |
359 | ||
360 | if (stream == &oxfw->tx_stream) | |
361 | conn = &oxfw->out_conn; | |
362 | else | |
363 | conn = &oxfw->in_conn; | |
364 | ||
365 | if (cmp_connection_update(conn) < 0) | |
366 | stop_stream(oxfw, stream); | |
e2786ca6 | 367 | else |
b0ac0009 | 368 | amdtp_stream_update(stream); |
e2786ca6 | 369 | } |
5cd1d3f4 | 370 | |
3c96101f TS |
371 | int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw, |
372 | enum avc_general_plug_dir dir, | |
373 | struct snd_oxfw_stream_formation *formation) | |
374 | { | |
375 | u8 *format; | |
376 | unsigned int len; | |
377 | int err; | |
378 | ||
379 | len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; | |
380 | format = kmalloc(len, GFP_KERNEL); | |
381 | if (format == NULL) | |
382 | return -ENOMEM; | |
383 | ||
384 | err = avc_stream_get_format_single(oxfw->unit, dir, 0, format, &len); | |
385 | if (err < 0) | |
386 | goto end; | |
387 | if (len < 3) { | |
388 | err = -EIO; | |
389 | goto end; | |
390 | } | |
391 | ||
392 | err = snd_oxfw_stream_parse_format(format, formation); | |
393 | end: | |
394 | kfree(format); | |
395 | return err; | |
396 | } | |
397 | ||
5cd1d3f4 TS |
398 | /* |
399 | * See Table 6.16 - AM824 Stream Format | |
400 | * Figure 6.19 - format_information field for AM824 Compound | |
401 | * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) | |
402 | * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 | |
403 | */ | |
404 | int snd_oxfw_stream_parse_format(u8 *format, | |
405 | struct snd_oxfw_stream_formation *formation) | |
406 | { | |
407 | unsigned int i, e, channels, type; | |
408 | ||
409 | memset(formation, 0, sizeof(struct snd_oxfw_stream_formation)); | |
410 | ||
411 | /* | |
412 | * this module can support a hierarchy combination that: | |
413 | * Root: Audio and Music (0x90) | |
414 | * Level 1: AM824 Compound (0x40) | |
415 | */ | |
416 | if ((format[0] != 0x90) || (format[1] != 0x40)) | |
417 | return -ENOSYS; | |
418 | ||
419 | /* check the sampling rate */ | |
420 | for (i = 0; i < ARRAY_SIZE(avc_stream_rate_table); i++) { | |
421 | if (format[2] == avc_stream_rate_table[i]) | |
422 | break; | |
423 | } | |
424 | if (i == ARRAY_SIZE(avc_stream_rate_table)) | |
425 | return -ENOSYS; | |
426 | ||
427 | formation->rate = oxfw_rate_table[i]; | |
428 | ||
429 | for (e = 0; e < format[4]; e++) { | |
430 | channels = format[5 + e * 2]; | |
431 | type = format[6 + e * 2]; | |
432 | ||
433 | switch (type) { | |
434 | /* IEC 60958 Conformant, currently handled as MBLA */ | |
435 | case 0x00: | |
436 | /* Multi Bit Linear Audio (Raw) */ | |
437 | case 0x06: | |
438 | formation->pcm += channels; | |
439 | break; | |
440 | /* MIDI Conformant */ | |
441 | case 0x0d: | |
442 | formation->midi = channels; | |
443 | break; | |
444 | /* IEC 61937-3 to 7 */ | |
445 | case 0x01: | |
446 | case 0x02: | |
447 | case 0x03: | |
448 | case 0x04: | |
449 | case 0x05: | |
450 | /* Multi Bit Linear Audio */ | |
451 | case 0x07: /* DVD-Audio */ | |
452 | case 0x0c: /* High Precision */ | |
453 | /* One Bit Audio */ | |
454 | case 0x08: /* (Plain) Raw */ | |
455 | case 0x09: /* (Plain) SACD */ | |
456 | case 0x0a: /* (Encoded) Raw */ | |
457 | case 0x0b: /* (Encoded) SACD */ | |
458 | /* SMPTE Time-Code conformant */ | |
459 | case 0x0e: | |
460 | /* Sample Count */ | |
461 | case 0x0f: | |
462 | /* Anciliary Data */ | |
463 | case 0x10: | |
464 | /* Synchronization Stream (Stereo Raw audio) */ | |
465 | case 0x40: | |
466 | /* Don't care */ | |
467 | case 0xff: | |
468 | default: | |
469 | return -ENOSYS; /* not supported */ | |
470 | } | |
471 | } | |
472 | ||
473 | if (formation->pcm > AMDTP_MAX_CHANNELS_FOR_PCM || | |
474 | formation->midi > AMDTP_MAX_CHANNELS_FOR_MIDI) | |
475 | return -ENOSYS; | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static int | |
481 | assume_stream_formats(struct snd_oxfw *oxfw, enum avc_general_plug_dir dir, | |
482 | unsigned int pid, u8 *buf, unsigned int *len, | |
483 | u8 **formats) | |
484 | { | |
485 | struct snd_oxfw_stream_formation formation; | |
486 | unsigned int i, eid; | |
487 | int err; | |
488 | ||
489 | /* get format at current sampling rate */ | |
490 | err = avc_stream_get_format_single(oxfw->unit, dir, pid, buf, len); | |
491 | if (err < 0) { | |
492 | dev_err(&oxfw->unit->device, | |
493 | "fail to get current stream format for isoc %s plug %d:%d\n", | |
494 | (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", | |
495 | pid, err); | |
496 | goto end; | |
497 | } | |
498 | ||
499 | /* parse and set stream format */ | |
500 | eid = 0; | |
501 | err = snd_oxfw_stream_parse_format(buf, &formation); | |
502 | if (err < 0) | |
503 | goto end; | |
504 | ||
505 | formats[eid] = kmalloc(*len, GFP_KERNEL); | |
506 | if (formats[eid] == NULL) { | |
507 | err = -ENOMEM; | |
508 | goto end; | |
509 | } | |
510 | memcpy(formats[eid], buf, *len); | |
511 | ||
512 | /* apply the format for each available sampling rate */ | |
513 | for (i = 0; i < ARRAY_SIZE(oxfw_rate_table); i++) { | |
514 | if (formation.rate == oxfw_rate_table[i]) | |
515 | continue; | |
516 | ||
517 | err = avc_general_inquiry_sig_fmt(oxfw->unit, | |
518 | oxfw_rate_table[i], | |
519 | dir, pid); | |
520 | if (err < 0) | |
521 | continue; | |
522 | ||
523 | eid++; | |
524 | formats[eid] = kmalloc(*len, GFP_KERNEL); | |
525 | if (formats[eid] == NULL) { | |
526 | err = -ENOMEM; | |
527 | goto end; | |
528 | } | |
529 | memcpy(formats[eid], buf, *len); | |
530 | formats[eid][2] = avc_stream_rate_table[i]; | |
531 | } | |
532 | ||
533 | err = 0; | |
534 | oxfw->assumed = true; | |
535 | end: | |
536 | return err; | |
537 | } | |
538 | ||
539 | static int fill_stream_formats(struct snd_oxfw *oxfw, | |
540 | enum avc_general_plug_dir dir, | |
541 | unsigned short pid) | |
542 | { | |
543 | u8 *buf, **formats; | |
544 | unsigned int len, eid = 0; | |
545 | struct snd_oxfw_stream_formation dummy; | |
546 | int err; | |
547 | ||
548 | buf = kmalloc(AVC_GENERIC_FRAME_MAXIMUM_BYTES, GFP_KERNEL); | |
549 | if (buf == NULL) | |
550 | return -ENOMEM; | |
551 | ||
b0ac0009 TS |
552 | if (dir == AVC_GENERAL_PLUG_DIR_OUT) |
553 | formats = oxfw->tx_stream_formats; | |
554 | else | |
555 | formats = oxfw->rx_stream_formats; | |
5cd1d3f4 TS |
556 | |
557 | /* get first entry */ | |
558 | len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; | |
559 | err = avc_stream_get_format_list(oxfw->unit, dir, 0, buf, &len, 0); | |
560 | if (err == -ENOSYS) { | |
561 | /* LIST subfunction is not implemented */ | |
562 | len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; | |
563 | err = assume_stream_formats(oxfw, dir, pid, buf, &len, | |
564 | formats); | |
565 | goto end; | |
566 | } else if (err < 0) { | |
567 | dev_err(&oxfw->unit->device, | |
568 | "fail to get stream format %d for isoc %s plug %d:%d\n", | |
569 | eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", | |
570 | pid, err); | |
571 | goto end; | |
572 | } | |
573 | ||
574 | /* LIST subfunction is implemented */ | |
575 | while (eid < SND_OXFW_STREAM_FORMAT_ENTRIES) { | |
576 | /* The format is too short. */ | |
577 | if (len < 3) { | |
578 | err = -EIO; | |
579 | break; | |
580 | } | |
581 | ||
582 | /* parse and set stream format */ | |
583 | err = snd_oxfw_stream_parse_format(buf, &dummy); | |
584 | if (err < 0) | |
585 | break; | |
586 | ||
587 | formats[eid] = kmalloc(len, GFP_KERNEL); | |
588 | if (formats[eid] == NULL) { | |
589 | err = -ENOMEM; | |
590 | break; | |
591 | } | |
592 | memcpy(formats[eid], buf, len); | |
593 | ||
594 | /* get next entry */ | |
595 | len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; | |
596 | err = avc_stream_get_format_list(oxfw->unit, dir, 0, | |
597 | buf, &len, ++eid); | |
598 | /* No entries remained. */ | |
599 | if (err == -EINVAL) { | |
600 | err = 0; | |
601 | break; | |
602 | } else if (err < 0) { | |
603 | dev_err(&oxfw->unit->device, | |
604 | "fail to get stream format %d for isoc %s plug %d:%d\n", | |
605 | eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : | |
606 | "out", | |
607 | pid, err); | |
608 | break; | |
609 | } | |
610 | } | |
611 | end: | |
612 | kfree(buf); | |
613 | return err; | |
614 | } | |
615 | ||
616 | int snd_oxfw_stream_discover(struct snd_oxfw *oxfw) | |
617 | { | |
618 | u8 plugs[AVC_PLUG_INFO_BUF_BYTES]; | |
619 | int err; | |
620 | ||
621 | /* the number of plugs for isoc in/out, ext in/out */ | |
622 | err = avc_general_get_plug_info(oxfw->unit, 0x1f, 0x07, 0x00, plugs); | |
623 | if (err < 0) { | |
624 | dev_err(&oxfw->unit->device, | |
625 | "fail to get info for isoc/external in/out plugs: %d\n", | |
626 | err); | |
627 | goto end; | |
b0ac0009 | 628 | } else if ((plugs[0] == 0) && (plugs[1] == 0)) { |
5cd1d3f4 TS |
629 | err = -ENOSYS; |
630 | goto end; | |
631 | } | |
632 | ||
b0ac0009 TS |
633 | /* use oPCR[0] if exists */ |
634 | if (plugs[1] > 0) { | |
635 | err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_OUT, 0); | |
636 | if (err < 0) | |
637 | goto end; | |
638 | oxfw->has_output = true; | |
639 | } | |
640 | ||
5cd1d3f4 TS |
641 | /* use iPCR[0] if exists */ |
642 | if (plugs[0] > 0) | |
643 | err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_IN, 0); | |
644 | end: | |
645 | return err; | |
646 | } | |
8985f4ac TS |
647 | |
648 | void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw) | |
649 | { | |
650 | oxfw->dev_lock_changed = true; | |
651 | wake_up(&oxfw->hwdep_wait); | |
652 | } | |
653 | ||
654 | int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw) | |
655 | { | |
656 | int err; | |
657 | ||
658 | spin_lock_irq(&oxfw->lock); | |
659 | ||
660 | /* user land lock this */ | |
661 | if (oxfw->dev_lock_count < 0) { | |
662 | err = -EBUSY; | |
663 | goto end; | |
664 | } | |
665 | ||
666 | /* this is the first time */ | |
667 | if (oxfw->dev_lock_count++ == 0) | |
668 | snd_oxfw_stream_lock_changed(oxfw); | |
669 | err = 0; | |
670 | end: | |
671 | spin_unlock_irq(&oxfw->lock); | |
672 | return err; | |
673 | } | |
674 | ||
675 | void snd_oxfw_stream_lock_release(struct snd_oxfw *oxfw) | |
676 | { | |
677 | spin_lock_irq(&oxfw->lock); | |
678 | ||
679 | if (WARN_ON(oxfw->dev_lock_count <= 0)) | |
680 | goto end; | |
681 | if (--oxfw->dev_lock_count == 0) | |
682 | snd_oxfw_stream_lock_changed(oxfw); | |
683 | end: | |
684 | spin_unlock_irq(&oxfw->lock); | |
685 | } |