1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
3 * <linux/usb/audio.h> -- USB Audio definitions.
5 * Copyright (C) 2006 Thumtronics Pty Ltd.
6 * Developed for Thumtronics by Grey Innovation
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.
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:
16 * http://www.usb.org/developers/devclass_docs/audio10.pdf
18 * Types and defines in this file are either specific to version 1.0 of
19 * this standard or common for newer versions.
22 #ifndef _UAPI__LINUX_USB_AUDIO_H
23 #define _UAPI__LINUX_USB_AUDIO_H
25 #include <linux/types.h>
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
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
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
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
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
61 /* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */
62 #define UAC_EP_GENERAL 0x01
64 /* A.9 Audio Class-Specific Request Codes */
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)
85 #define UAC_GET_STAT 0xff
87 /* A.10 Control Selector Codes */
89 /* A.10.1 Terminal Control Selectors */
90 #define UAC_TERM_COPY_PROTECT 0x01
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
104 #define UAC_CONTROL_BIT(CS) (1 << ((CS) - 1))
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
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
114 /* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */
115 #define UAC_3D_ENABLE 0x01
116 #define UAC_3D_SPACE 0x02
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
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
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
138 /* A.10.4 Extension Unit Control Selectors */
139 #define UAC_XU_ENABLE 0x01
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
146 /* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */
147 #define UAC_MS_GENERAL 0x01
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
154 /* Terminal Control Selectors */
155 /* 4.3.2 Class-Specific AC Interface Descriptor */
156 struct 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));
166 #define UAC_DT_AC_HEADER_SIZE(n) (8 + (n))
168 /* As above, but more useful for defining your own descriptors: */
169 #define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \
170 struct uac1_ac_header_descriptor_##n { \
172 __u8 bDescriptorType; \
173 __u8 bDescriptorSubtype; \
175 __le16 wTotalLength; \
176 __u8 bInCollection; \
177 __u8 baInterfaceNr[n]; \
178 } __attribute__ ((packed))
180 /* 4.3.2.1 Input Terminal Descriptor */
181 struct 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;
192 } __attribute__ ((packed));
194 #define UAC_DT_INPUT_TERMINAL_SIZE 12
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
205 /* Terminals - control selectors */
207 #define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01
209 /* 4.3.2.2 Output Terminal Descriptor */
210 struct 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*/
219 } __attribute__ ((packed));
221 #define UAC_DT_OUTPUT_TERMINAL_SIZE 9
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
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
241 /* Set bControlSize = 2 as default setting */
242 #define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)
244 /* As above, but more useful for defining your own descriptors: */
245 #define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \
246 struct uac_feature_unit_descriptor_##ch { \
248 __u8 bDescriptorType; \
249 __u8 bDescriptorSubtype; \
253 __le16 bmaControls[ch + 1]; \
255 } __attribute__ ((packed))
257 /* 4.3.2.3 Mixer Unit Descriptor */
258 struct uac_mixer_unit_descriptor {
260 __u8 bDescriptorType;
261 __u8 bDescriptorSubtype;
265 } __attribute__ ((packed));
267 static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
269 return desc->baSourceID[desc->bNrInPins];
272 static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,
275 if (protocol == UAC_VERSION_1)
276 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
277 desc->baSourceID[desc->bNrInPins + 1];
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]);
285 static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,
288 return (protocol == UAC_VERSION_1) ?
289 desc->baSourceID[desc->bNrInPins + 3] :
290 desc->baSourceID[desc->bNrInPins + 5];
293 static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,
298 return &desc->baSourceID[desc->bNrInPins + 4];
300 return &desc->baSourceID[desc->bNrInPins + 6];
302 return &desc->baSourceID[desc->bNrInPins + 2];
308 static inline __u16 uac3_mixer_unit_wClusterDescrID(struct uac_mixer_unit_descriptor *desc)
310 return (desc->baSourceID[desc->bNrInPins + 1] << 8) |
311 desc->baSourceID[desc->bNrInPins];
314 static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)
316 __u8 *raw = (__u8 *) desc;
317 return raw[desc->bLength - 1];
320 /* 4.3.2.4 Selector Unit Descriptor */
321 struct uac_selector_unit_descriptor {
323 __u8 bDescriptorType;
324 __u8 bDescriptorSubtype;
328 } __attribute__ ((packed));
330 static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
332 __u8 *raw = (__u8 *) desc;
333 return raw[desc->bLength - 1];
336 /* 4.3.2.5 Feature Unit Descriptor */
337 struct uac_feature_unit_descriptor {
339 __u8 bDescriptorType;
340 __u8 bDescriptorSubtype;
344 __u8 bmaControls[0]; /* variable length */
345 } __attribute__((packed));
347 static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)
349 __u8 *raw = (__u8 *) desc;
350 return raw[desc->bLength - 1];
353 /* 4.3.2.6 Processing Unit Descriptors */
354 struct uac_processing_unit_descriptor {
356 __u8 bDescriptorType;
357 __u8 bDescriptorSubtype;
362 } __attribute__ ((packed));
364 static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
366 return desc->baSourceID[desc->bNrInPins];
369 static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,
372 if (protocol == UAC_VERSION_1)
373 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
374 desc->baSourceID[desc->bNrInPins + 1];
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]);
382 static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,
385 return (protocol == UAC_VERSION_1) ?
386 desc->baSourceID[desc->bNrInPins + 3] :
387 desc->baSourceID[desc->bNrInPins + 5];
390 static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
393 return (protocol == UAC_VERSION_1) ?
394 desc->baSourceID[desc->bNrInPins + 4] :
395 2; /* in UAC2, this value is constant */
398 static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,
401 return (protocol == UAC_VERSION_1) ?
402 &desc->baSourceID[desc->bNrInPins + 5] :
403 &desc->baSourceID[desc->bNrInPins + 6];
406 static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,
409 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
410 return *(uac_processing_unit_bmControls(desc, protocol)
414 static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
417 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
418 return uac_processing_unit_bmControls(desc, protocol)
422 /* 4.5.2 Class-Specific AS Interface Descriptor */
423 struct uac1_as_header_descriptor {
424 __u8 bLength; /* in bytes: 7 */
425 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
426 __u8 bDescriptorSubtype; /* AS_GENERAL */
427 __u8 bTerminalLink; /* Terminal ID of connected Terminal */
428 __u8 bDelay; /* Delay introduced by the data path */
429 __le16 wFormatTag; /* The Audio Data Format */
430 } __attribute__ ((packed));
432 #define UAC_DT_AS_HEADER_SIZE 7
434 /* Formats - A.1.1 Audio Data Format Type I Codes */
435 #define UAC_FORMAT_TYPE_I_UNDEFINED 0x0
436 #define UAC_FORMAT_TYPE_I_PCM 0x1
437 #define UAC_FORMAT_TYPE_I_PCM8 0x2
438 #define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3
439 #define UAC_FORMAT_TYPE_I_ALAW 0x4
440 #define UAC_FORMAT_TYPE_I_MULAW 0x5
442 struct uac_format_type_i_continuous_descriptor {
443 __u8 bLength; /* in bytes: 8 + (ns * 3) */
444 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
445 __u8 bDescriptorSubtype; /* FORMAT_TYPE */
446 __u8 bFormatType; /* FORMAT_TYPE_1 */
447 __u8 bNrChannels; /* physical channels in the stream */
448 __u8 bSubframeSize; /* */
451 __u8 tLowerSamFreq[3];
452 __u8 tUpperSamFreq[3];
453 } __attribute__ ((packed));
455 #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14
457 struct uac_format_type_i_discrete_descriptor {
458 __u8 bLength; /* in bytes: 8 + (ns * 3) */
459 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
460 __u8 bDescriptorSubtype; /* FORMAT_TYPE */
461 __u8 bFormatType; /* FORMAT_TYPE_1 */
462 __u8 bNrChannels; /* physical channels in the stream */
463 __u8 bSubframeSize; /* */
467 } __attribute__ ((packed));
469 #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \
470 struct uac_format_type_i_discrete_descriptor_##n { \
472 __u8 bDescriptorType; \
473 __u8 bDescriptorSubtype; \
476 __u8 bSubframeSize; \
477 __u8 bBitResolution; \
479 __u8 tSamFreq[n][3]; \
480 } __attribute__ ((packed))
482 #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
484 struct uac_format_type_i_ext_descriptor {
486 __u8 bDescriptorType;
487 __u8 bDescriptorSubtype;
493 __u8 bSideBandProtocol;
494 } __attribute__((packed));
496 /* Formats - Audio Data Format Type I Codes */
498 #define UAC_FORMAT_TYPE_II_MPEG 0x1001
499 #define UAC_FORMAT_TYPE_II_AC3 0x1002
501 struct uac_format_type_ii_discrete_descriptor {
503 __u8 bDescriptorType;
504 __u8 bDescriptorSubtype;
507 __le16 wSamplesPerFrame;
510 } __attribute__((packed));
512 struct uac_format_type_ii_ext_descriptor {
514 __u8 bDescriptorType;
515 __u8 bDescriptorSubtype;
518 __le16 wSamplesPerFrame;
520 __u8 bSideBandProtocol;
521 } __attribute__((packed));
524 #define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001
525 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002
526 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003
527 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004
528 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005
529 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006
531 /* Formats - A.2 Format Type Codes */
532 #define UAC_FORMAT_TYPE_UNDEFINED 0x0
533 #define UAC_FORMAT_TYPE_I 0x1
534 #define UAC_FORMAT_TYPE_II 0x2
535 #define UAC_FORMAT_TYPE_III 0x3
536 #define UAC_EXT_FORMAT_TYPE_I 0x81
537 #define UAC_EXT_FORMAT_TYPE_II 0x82
538 #define UAC_EXT_FORMAT_TYPE_III 0x83
540 struct uac_iso_endpoint_descriptor {
541 __u8 bLength; /* in bytes: 7 */
542 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */
543 __u8 bDescriptorSubtype; /* EP_GENERAL */
545 __u8 bLockDelayUnits;
547 } __attribute__((packed));
548 #define UAC_ISO_ENDPOINT_DESC_SIZE 7
550 #define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01
551 #define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02
552 #define UAC_EP_CS_ATTR_FILL_MAX 0x80
554 /* status word format (3.7.1.1) */
556 #define UAC1_STATUS_TYPE_ORIG_MASK 0x0f
557 #define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0
558 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1
559 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2
561 #define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7)
562 #define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6)
564 struct uac1_status_word {
567 } __attribute__((packed));
570 #endif /* _UAPI__LINUX_USB_AUDIO_H */