1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * <linux/usb/audio.h> -- USB Audio definitions.
4 *
5 * Copyright (C) 2006 Thumtronics Pty Ltd.
6 * Developed for Thumtronics by Grey Innovation
7 * Ben Williamson <ben.williamson@greyinnovation.com>
8 *
9 * This software is distributed under the terms of the GNU General Public
10 * License ("GPL") version 2, as published by the Free Software Foundation.
11 *
12 * This file holds USB constants and structures defined
13 * by the USB Device Class Definition for Audio Devices.
14 * Comments below reference relevant sections of that document:
15 *
16 * http://www.usb.org/developers/devclass_docs/audio10.pdf
17 *
18 * Types and defines in this file are either specific to version 1.0 of
19 * this standard or common for newer versions.
20 */
21
22#ifndef __LINUX_USB_AUDIO_H
23#define __LINUX_USB_AUDIO_H
24
25#include <linux/types.h>
26
27/* bInterfaceProtocol values to denote the version of the standard used */
28#define UAC_VERSION_1 0x00
29#define UAC_VERSION_2 0x20
30#define UAC_VERSION_3 0x30
31
32/* A.2 Audio Interface Subclass Codes */
33#define USB_SUBCLASS_AUDIOCONTROL 0x01
34#define USB_SUBCLASS_AUDIOSTREAMING 0x02
35#define USB_SUBCLASS_MIDISTREAMING 0x03
36
37/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
38#define UAC_HEADER 0x01
39#define UAC_INPUT_TERMINAL 0x02
40#define UAC_OUTPUT_TERMINAL 0x03
41#define UAC_MIXER_UNIT 0x04
42#define UAC_SELECTOR_UNIT 0x05
43#define UAC_FEATURE_UNIT 0x06
44#define UAC1_PROCESSING_UNIT 0x07
45#define UAC1_EXTENSION_UNIT 0x08
46
47/* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */
48#define UAC_AS_GENERAL 0x01
49#define UAC_FORMAT_TYPE 0x02
50#define UAC_FORMAT_SPECIFIC 0x03
51
52/* A.7 Processing Unit Process Types */
53#define UAC_PROCESS_UNDEFINED 0x00
54#define UAC_PROCESS_UP_DOWNMIX 0x01
55#define UAC_PROCESS_DOLBY_PROLOGIC 0x02
56#define UAC_PROCESS_STEREO_EXTENDER 0x03
57#define UAC_PROCESS_REVERB 0x04
58#define UAC_PROCESS_CHORUS 0x05
59#define UAC_PROCESS_DYN_RANGE_COMP 0x06
60
61/* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */
62#define UAC_EP_GENERAL 0x01
63
64/* A.9 Audio Class-Specific Request Codes */
65#define UAC_SET_ 0x00
66#define UAC_GET_ 0x80
67
68#define UAC__CUR 0x1
69#define UAC__MIN 0x2
70#define UAC__MAX 0x3
71#define UAC__RES 0x4
72#define UAC__MEM 0x5
73
74#define UAC_SET_CUR (UAC_SET_ | UAC__CUR)
75#define UAC_GET_CUR (UAC_GET_ | UAC__CUR)
76#define UAC_SET_MIN (UAC_SET_ | UAC__MIN)
77#define UAC_GET_MIN (UAC_GET_ | UAC__MIN)
78#define UAC_SET_MAX (UAC_SET_ | UAC__MAX)
79#define UAC_GET_MAX (UAC_GET_ | UAC__MAX)
80#define UAC_SET_RES (UAC_SET_ | UAC__RES)
81#define UAC_GET_RES (UAC_GET_ | UAC__RES)
82#define UAC_SET_MEM (UAC_SET_ | UAC__MEM)
83#define UAC_GET_MEM (UAC_GET_ | UAC__MEM)
84
85#define UAC_GET_STAT 0xff
86
87/* A.10 Control Selector Codes */
88
89/* A.10.1 Terminal Control Selectors */
90#define UAC_TERM_COPY_PROTECT 0x01
91
92/* A.10.2 Feature Unit Control Selectors */
93#define UAC_FU_MUTE 0x01
94#define UAC_FU_VOLUME 0x02
95#define UAC_FU_BASS 0x03
96#define UAC_FU_MID 0x04
97#define UAC_FU_TREBLE 0x05
98#define UAC_FU_GRAPHIC_EQUALIZER 0x06
99#define UAC_FU_AUTOMATIC_GAIN 0x07
100#define UAC_FU_DELAY 0x08
101#define UAC_FU_BASS_BOOST 0x09
102#define UAC_FU_LOUDNESS 0x0a
103
104#define UAC_CONTROL_BIT(CS) (1 << ((CS) - 1))
105
106/* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */
107#define UAC_UD_ENABLE 0x01
108#define UAC_UD_MODE_SELECT 0x02
109
110/* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */
111#define UAC_DP_ENABLE 0x01
112#define UAC_DP_MODE_SELECT 0x02
113
114/* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */
115#define UAC_3D_ENABLE 0x01
116#define UAC_3D_SPACE 0x02
117
118/* A.10.3.4 Reverberation Processing Unit Control Selectors */
119#define UAC_REVERB_ENABLE 0x01
120#define UAC_REVERB_LEVEL 0x02
121#define UAC_REVERB_TIME 0x03
122#define UAC_REVERB_FEEDBACK 0x04
123
124/* A.10.3.5 Chorus Processing Unit Control Selectors */
125#define UAC_CHORUS_ENABLE 0x01
126#define UAC_CHORUS_LEVEL 0x02
127#define UAC_CHORUS_RATE 0x03
128#define UAC_CHORUS_DEPTH 0x04
129
130/* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */
131#define UAC_DCR_ENABLE 0x01
132#define UAC_DCR_RATE 0x02
133#define UAC_DCR_MAXAMPL 0x03
134#define UAC_DCR_THRESHOLD 0x04
135#define UAC_DCR_ATTACK_TIME 0x05
136#define UAC_DCR_RELEASE_TIME 0x06
137
138/* A.10.4 Extension Unit Control Selectors */
139#define UAC_XU_ENABLE 0x01
140
141/* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */
142#define UAC_MS_HEADER 0x01
143#define UAC_MIDI_IN_JACK 0x02
144#define UAC_MIDI_OUT_JACK 0x03
145
146/* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */
147#define UAC_MS_GENERAL 0x01
148
149/* Terminals - 2.1 USB Terminal Types */
150#define UAC_TERMINAL_UNDEFINED 0x100
151#define UAC_TERMINAL_STREAMING 0x101
152#define UAC_TERMINAL_VENDOR_SPEC 0x1FF
153
154/* Terminal Control Selectors */
155/* 4.3.2 Class-Specific AC Interface Descriptor */
156struct uac1_ac_header_descriptor {
157 __u8 bLength; /* 8 + n */
158 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
159 __u8 bDescriptorSubtype; /* UAC_MS_HEADER */
160 __le16 bcdADC; /* 0x0100 */
161 __le16 wTotalLength; /* includes Unit and Terminal desc. */
162 __u8 bInCollection; /* n */
163 __u8 baInterfaceNr[]; /* [n] */
164} __attribute__ ((packed));
165
166#define UAC_DT_AC_HEADER_SIZE(n) (8 + (n))
167
168/* As above, but more useful for defining your own descriptors: */
169#define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \
170struct uac1_ac_header_descriptor_##n { \
171 __u8 bLength; \
172 __u8 bDescriptorType; \
173 __u8 bDescriptorSubtype; \
174 __le16 bcdADC; \
175 __le16 wTotalLength; \
176 __u8 bInCollection; \
177 __u8 baInterfaceNr[n]; \
178} __attribute__ ((packed))
179
180/* 4.3.2.1 Input Terminal Descriptor */
181struct uac_input_terminal_descriptor {
182 __u8 bLength; /* in bytes: 12 */
183 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
184 __u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */
185 __u8 bTerminalID; /* Constant uniquely terminal ID */
186 __le16 wTerminalType; /* USB Audio Terminal Types */
187 __u8 bAssocTerminal; /* ID of the Output Terminal associated */
188 __u8 bNrChannels; /* Number of logical output channels */
189 __le16 wChannelConfig;
190 __u8 iChannelNames;
191 __u8 iTerminal;
192} __attribute__ ((packed));
193
194#define UAC_DT_INPUT_TERMINAL_SIZE 12
195
196/* Terminals - 2.2 Input Terminal Types */
197#define UAC_INPUT_TERMINAL_UNDEFINED 0x200
198#define UAC_INPUT_TERMINAL_MICROPHONE 0x201
199#define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202
200#define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203
201#define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204
202#define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205
203#define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206
204
205/* Terminals - control selectors */
206
207#define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01
208
209/* 4.3.2.2 Output Terminal Descriptor */
210struct uac1_output_terminal_descriptor {
211 __u8 bLength; /* in bytes: 9 */
212 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
213 __u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */
214 __u8 bTerminalID; /* Constant uniquely terminal ID */
215 __le16 wTerminalType; /* USB Audio Terminal Types */
216 __u8 bAssocTerminal; /* ID of the Input Terminal associated */
217 __u8 bSourceID; /* ID of the connected Unit or Terminal*/
218 __u8 iTerminal;
219} __attribute__ ((packed));
220
221#define UAC_DT_OUTPUT_TERMINAL_SIZE 9
222
223/* Terminals - 2.3 Output Terminal Types */
224#define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300
225#define UAC_OUTPUT_TERMINAL_SPEAKER 0x301
226#define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302
227#define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303
228#define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304
229#define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305
230#define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306
231#define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307
232
233/* Terminals - 2.4 Bi-directional Terminal Types */
234#define UAC_BIDIR_TERMINAL_UNDEFINED 0x400
235#define UAC_BIDIR_TERMINAL_HANDSET 0x401
236#define UAC_BIDIR_TERMINAL_HEADSET 0x402
237#define UAC_BIDIR_TERMINAL_SPEAKER_PHONE 0x403
238#define UAC_BIDIR_TERMINAL_ECHO_SUPPRESSING 0x404
239#define UAC_BIDIR_TERMINAL_ECHO_CANCELING 0x405
240
241/* Set bControlSize = 2 as default setting */
242#define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)
243
244/* As above, but more useful for defining your own descriptors: */
245#define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \
246struct uac_feature_unit_descriptor_##ch { \
247 __u8 bLength; \
248 __u8 bDescriptorType; \
249 __u8 bDescriptorSubtype; \
250 __u8 bUnitID; \
251 __u8 bSourceID; \
252 __u8 bControlSize; \
253 __le16 bmaControls[ch + 1]; \
254 __u8 iFeature; \
255} __attribute__ ((packed))
256
257/* 4.3.2.3 Mixer Unit Descriptor */
258struct uac_mixer_unit_descriptor {
259 __u8 bLength;
260 __u8 bDescriptorType;
261 __u8 bDescriptorSubtype;
262 __u8 bUnitID;
263 __u8 bNrInPins;
264 __u8 baSourceID[];
265} __attribute__ ((packed));
266
267static __inline__ __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
268{
269 return desc->baSourceID[desc->bNrInPins];
270}
271
272static __inline__ __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,
273 int protocol)
274{
275 if (protocol == UAC_VERSION_1)
276 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
277 desc->baSourceID[desc->bNrInPins + 1];
278 else
279 return (desc->baSourceID[desc->bNrInPins + 4] << 24) |
280 (desc->baSourceID[desc->bNrInPins + 3] << 16) |
281 (desc->baSourceID[desc->bNrInPins + 2] << 8) |
282 (desc->baSourceID[desc->bNrInPins + 1]);
283}
284
285static __inline__ __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,
286 int protocol)
287{
288 return (protocol == UAC_VERSION_1) ?
289 desc->baSourceID[desc->bNrInPins + 3] :
290 desc->baSourceID[desc->bNrInPins + 5];
291}
292
293static __inline__ __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,
294 int protocol)
295{
296 switch (protocol) {
297 case UAC_VERSION_1:
298 return &desc->baSourceID[desc->bNrInPins + 4];
299 case UAC_VERSION_2:
300 return &desc->baSourceID[desc->bNrInPins + 6];
301 case UAC_VERSION_3:
302 return &desc->baSourceID[desc->bNrInPins + 2];
303 default:
304 return NULL;
305 }
306}
307
308static __inline__ __u16 uac3_mixer_unit_wClusterDescrID(struct uac_mixer_unit_descriptor *desc)
309{
310 return (desc->baSourceID[desc->bNrInPins + 1] << 8) |
311 desc->baSourceID[desc->bNrInPins];
312}
313
314static __inline__ __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)
315{
316 __u8 *raw = (__u8 *) desc;
317 return raw[desc->bLength - 1];
318}
319
320/* 4.3.2.4 Selector Unit Descriptor */
321struct uac_selector_unit_descriptor {
322 __u8 bLength;
323 __u8 bDescriptorType;
324 __u8 bDescriptorSubtype;
325 __u8 bUintID;
326 __u8 bNrInPins;
327 __u8 baSourceID[];
328} __attribute__ ((packed));
329
330static __inline__ __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
331{
332 __u8 *raw = (__u8 *) desc;
333 return raw[desc->bLength - 1];
334}
335
336/* 4.3.2.5 Feature Unit Descriptor */
337struct uac_feature_unit_descriptor {
338 __u8 bLength;
339 __u8 bDescriptorType;
340 __u8 bDescriptorSubtype;
341 __u8 bUnitID;
342 __u8 bSourceID;
343 __u8 bControlSize;
344 __u8 bmaControls[]; /* variable length */
345} __attribute__((packed));
346
347static __inline__ __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)
348{
349 __u8 *raw = (__u8 *) desc;
350 return raw[desc->bLength - 1];
351}
352
353/* 4.3.2.6 Processing Unit Descriptors */
354struct uac_processing_unit_descriptor {
355 __u8 bLength;
356 __u8 bDescriptorType;
357 __u8 bDescriptorSubtype;
358 __u8 bUnitID;
359 __le16 wProcessType;
360 __u8 bNrInPins;
361 __u8 baSourceID[];
362} __attribute__ ((packed));
363
364static __inline__ __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
365{
366 return desc->baSourceID[desc->bNrInPins];
367}
368
369static __inline__ __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,
370 int protocol)
371{
372 if (protocol == UAC_VERSION_1)
373 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
374 desc->baSourceID[desc->bNrInPins + 1];
375 else
376 return (desc->baSourceID[desc->bNrInPins + 4] << 24) |
377 (desc->baSourceID[desc->bNrInPins + 3] << 16) |
378 (desc->baSourceID[desc->bNrInPins + 2] << 8) |
379 (desc->baSourceID[desc->bNrInPins + 1]);
380}
381
382static __inline__ __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,
383 int protocol)
384{
385 return (protocol == UAC_VERSION_1) ?
386 desc->baSourceID[desc->bNrInPins + 3] :
387 desc->baSourceID[desc->bNrInPins + 5];
388}
389
390static __inline__ __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
391 int protocol)
392{
393 switch (protocol) {
394 case UAC_VERSION_1:
395 return desc->baSourceID[desc->bNrInPins + 4];
396 case UAC_VERSION_2:
397 return 2; /* in UAC2, this value is constant */
398 case UAC_VERSION_3:
399 return 4; /* in UAC3, this value is constant */
400 default:
401 return 1;
402 }
403}
404
405static __inline__ __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,
406 int protocol)
407{
408 switch (protocol) {
409 case UAC_VERSION_1:
410 return &desc->baSourceID[desc->bNrInPins + 5];
411 case UAC_VERSION_2:
412 return &desc->baSourceID[desc->bNrInPins + 6];
413 case UAC_VERSION_3:
414 return &desc->baSourceID[desc->bNrInPins + 2];
415 default:
416 return NULL;
417 }
418}
419
420static __inline__ __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,
421 int protocol)
422{
423 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
424
425 switch (protocol) {
426 case UAC_VERSION_1:
427 case UAC_VERSION_2:
428 default:
429 return *(uac_processing_unit_bmControls(desc, protocol)
430 + control_size);
431 case UAC_VERSION_3:
432 return 0; /* UAC3 does not have this field */
433 }
434}
435
436static __inline__ __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
437 int protocol)
438{
439 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
440
441 switch (protocol) {
442 case UAC_VERSION_1:
443 case UAC_VERSION_2:
444 default:
445 return uac_processing_unit_bmControls(desc, protocol)
446 + control_size + 1;
447 case UAC_VERSION_3:
448 return uac_processing_unit_bmControls(desc, protocol)
449 + control_size;
450 }
451}
452
453/*
454 * Extension Unit (XU) has almost compatible layout with Processing Unit, but
455 * on UAC2, it has a different bmControls size (bControlSize); it's 1 byte for
456 * XU while 2 bytes for PU. The last iExtension field is a one-byte index as
457 * well as iProcessing field of PU.
458 */
459static __inline__ __u8 uac_extension_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
460 int protocol)
461{
462 switch (protocol) {
463 case UAC_VERSION_1:
464 return desc->baSourceID[desc->bNrInPins + 4];
465 case UAC_VERSION_2:
466 return 1; /* in UAC2, this value is constant */
467 case UAC_VERSION_3:
468 return 4; /* in UAC3, this value is constant */
469 default:
470 return 1;
471 }
472}
473
474static __inline__ __u8 uac_extension_unit_iExtension(struct uac_processing_unit_descriptor *desc,
475 int protocol)
476{
477 __u8 control_size = uac_extension_unit_bControlSize(desc, protocol);
478
479 switch (protocol) {
480 case UAC_VERSION_1:
481 case UAC_VERSION_2:
482 default:
483 return *(uac_processing_unit_bmControls(desc, protocol)
484 + control_size);
485 case UAC_VERSION_3:
486 return 0; /* UAC3 does not have this field */
487 }
488}
489
490/* 4.5.2 Class-Specific AS Interface Descriptor */
491struct uac1_as_header_descriptor {
492 __u8 bLength; /* in bytes: 7 */
493 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
494 __u8 bDescriptorSubtype; /* AS_GENERAL */
495 __u8 bTerminalLink; /* Terminal ID of connected Terminal */
496 __u8 bDelay; /* Delay introduced by the data path */
497 __le16 wFormatTag; /* The Audio Data Format */
498} __attribute__ ((packed));
499
500#define UAC_DT_AS_HEADER_SIZE 7
501
502/* Formats - A.1.1 Audio Data Format Type I Codes */
503#define UAC_FORMAT_TYPE_I_UNDEFINED 0x0
504#define UAC_FORMAT_TYPE_I_PCM 0x1
505#define UAC_FORMAT_TYPE_I_PCM8 0x2
506#define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3
507#define UAC_FORMAT_TYPE_I_ALAW 0x4
508#define UAC_FORMAT_TYPE_I_MULAW 0x5
509
510struct uac_format_type_i_continuous_descriptor {
511 __u8 bLength; /* in bytes: 8 + (ns * 3) */
512 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
513 __u8 bDescriptorSubtype; /* FORMAT_TYPE */
514 __u8 bFormatType; /* FORMAT_TYPE_1 */
515 __u8 bNrChannels; /* physical channels in the stream */
516 __u8 bSubframeSize; /* */
517 __u8 bBitResolution;
518 __u8 bSamFreqType;
519 __u8 tLowerSamFreq[3];
520 __u8 tUpperSamFreq[3];
521} __attribute__ ((packed));
522
523#define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14
524
525struct uac_format_type_i_discrete_descriptor {
526 __u8 bLength; /* in bytes: 8 + (ns * 3) */
527 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
528 __u8 bDescriptorSubtype; /* FORMAT_TYPE */
529 __u8 bFormatType; /* FORMAT_TYPE_1 */
530 __u8 bNrChannels; /* physical channels in the stream */
531 __u8 bSubframeSize; /* */
532 __u8 bBitResolution;
533 __u8 bSamFreqType;
534 __u8 tSamFreq[][3];
535} __attribute__ ((packed));
536
537#define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \
538struct uac_format_type_i_discrete_descriptor_##n { \
539 __u8 bLength; \
540 __u8 bDescriptorType; \
541 __u8 bDescriptorSubtype; \
542 __u8 bFormatType; \
543 __u8 bNrChannels; \
544 __u8 bSubframeSize; \
545 __u8 bBitResolution; \
546 __u8 bSamFreqType; \
547 __u8 tSamFreq[n][3]; \
548} __attribute__ ((packed))
549
550#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
551
552struct uac_format_type_i_ext_descriptor {
553 __u8 bLength;
554 __u8 bDescriptorType;
555 __u8 bDescriptorSubtype;
556 __u8 bFormatType;
557 __u8 bSubslotSize;
558 __u8 bBitResolution;
559 __u8 bHeaderLength;
560 __u8 bControlSize;
561 __u8 bSideBandProtocol;
562} __attribute__((packed));
563
564/* Formats - Audio Data Format Type I Codes */
565
566#define UAC_FORMAT_TYPE_II_MPEG 0x1001
567#define UAC_FORMAT_TYPE_II_AC3 0x1002
568
569struct uac_format_type_ii_discrete_descriptor {
570 __u8 bLength;
571 __u8 bDescriptorType;
572 __u8 bDescriptorSubtype;
573 __u8 bFormatType;
574 __le16 wMaxBitRate;
575 __le16 wSamplesPerFrame;
576 __u8 bSamFreqType;
577 __u8 tSamFreq[][3];
578} __attribute__((packed));
579
580struct uac_format_type_ii_ext_descriptor {
581 __u8 bLength;
582 __u8 bDescriptorType;
583 __u8 bDescriptorSubtype;
584 __u8 bFormatType;
585 __le16 wMaxBitRate;
586 __le16 wSamplesPerFrame;
587 __u8 bHeaderLength;
588 __u8 bSideBandProtocol;
589} __attribute__((packed));
590
591/* type III */
592#define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001
593#define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002
594#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003
595#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004
596#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005
597#define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006
598
599/* Formats - A.2 Format Type Codes */
600#define UAC_FORMAT_TYPE_UNDEFINED 0x0
601#define UAC_FORMAT_TYPE_I 0x1
602#define UAC_FORMAT_TYPE_II 0x2
603#define UAC_FORMAT_TYPE_III 0x3
604#define UAC_EXT_FORMAT_TYPE_I 0x81
605#define UAC_EXT_FORMAT_TYPE_II 0x82
606#define UAC_EXT_FORMAT_TYPE_III 0x83
607
608struct uac_iso_endpoint_descriptor {
609 __u8 bLength; /* in bytes: 7 */
610 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */
611 __u8 bDescriptorSubtype; /* EP_GENERAL */
612 __u8 bmAttributes;
613 __u8 bLockDelayUnits;
614 __le16 wLockDelay;
615} __attribute__((packed));
616#define UAC_ISO_ENDPOINT_DESC_SIZE 7
617
618#define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01
619#define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02
620#define UAC_EP_CS_ATTR_FILL_MAX 0x80
621
622/* status word format (3.7.1.1) */
623
624#define UAC1_STATUS_TYPE_ORIG_MASK 0x0f
625#define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0
626#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1
627#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2
628
629#define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7)
630#define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6)
631
632struct uac1_status_word {
633 __u8 bStatusType;
634 __u8 bOriginator;
635} __attribute__((packed));
636
637
638#endif /* __LINUX_USB_AUDIO_H */