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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2010 Daniel Mack <daniel@caiaq.de>
4 *
5 * This software is distributed under the terms of the GNU General Public
6 * License ("GPL") version 2, as published by the Free Software Foundation.
7 *
8 * This file holds USB constants and structures defined
9 * by the USB Device Class Definition for Audio Devices in version 2.0.
10 * Comments below reference relevant sections of the documents contained
11 * in http://www.usb.org/developers/devclass_docs/Audio2.0_final.zip
12 */
13
14#ifndef __LINUX_USB_AUDIO_V2_H
15#define __LINUX_USB_AUDIO_V2_H
16
17#include <linux/types.h>
18
19/* v1.0 and v2.0 of this standard have many things in common. For the rest
20 * of the definitions, please refer to audio.h */
21
22/*
23 * bmControl field decoders
24 *
25 * From the USB Audio spec v2.0:
26 *
27 * bmaControls() is a (ch+1)-element array of 4-byte bitmaps,
28 * each containing a set of bit pairs. If a Control is present,
29 * it must be Host readable. If a certain Control is not
30 * present then the bit pair must be set to 0b00.
31 * If a Control is present but read-only, the bit pair must be
32 * set to 0b01. If a Control is also Host programmable, the bit
33 * pair must be set to 0b11. The value 0b10 is not allowed.
34 *
35 */
36
37static inline bool uac_v2v3_control_is_readable(u32 bmControls, u8 control)
38{
39 return (bmControls >> ((control - 1) * 2)) & 0x1;
40}
41
42static inline bool uac_v2v3_control_is_writeable(u32 bmControls, u8 control)
43{
44 return (bmControls >> ((control - 1) * 2)) & 0x2;
45}
46
47/* 4.7.2 Class-Specific AC Interface Descriptor */
48struct uac2_ac_header_descriptor {
49 __u8 bLength; /* 9 */
50 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
51 __u8 bDescriptorSubtype; /* UAC_MS_HEADER */
52 __le16 bcdADC; /* 0x0200 */
53 __u8 bCategory;
54 __le16 wTotalLength; /* includes Unit and Terminal desc. */
55 __u8 bmControls;
56} __packed;
57
58/* 2.3.1.6 Type I Format Type Descriptor (Frmts20 final.pdf)*/
59struct uac2_format_type_i_descriptor {
60 __u8 bLength; /* in bytes: 6 */
61 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
62 __u8 bDescriptorSubtype; /* FORMAT_TYPE */
63 __u8 bFormatType; /* FORMAT_TYPE_1 */
64 __u8 bSubslotSize; /* {1,2,3,4} */
65 __u8 bBitResolution;
66} __packed;
67
68/* 4.7.2.1 Clock Source Descriptor */
69
70struct uac_clock_source_descriptor {
71 __u8 bLength;
72 __u8 bDescriptorType;
73 __u8 bDescriptorSubtype;
74 __u8 bClockID;
75 __u8 bmAttributes;
76 __u8 bmControls;
77 __u8 bAssocTerminal;
78 __u8 iClockSource;
79} __attribute__((packed));
80
81/* bmAttribute fields */
82#define UAC_CLOCK_SOURCE_TYPE_EXT 0x0
83#define UAC_CLOCK_SOURCE_TYPE_INT_FIXED 0x1
84#define UAC_CLOCK_SOURCE_TYPE_INT_VAR 0x2
85#define UAC_CLOCK_SOURCE_TYPE_INT_PROG 0x3
86#define UAC_CLOCK_SOURCE_SYNCED_TO_SOF (1 << 2)
87
88/* 4.7.2.2 Clock Source Descriptor */
89
90struct uac_clock_selector_descriptor {
91 __u8 bLength;
92 __u8 bDescriptorType;
93 __u8 bDescriptorSubtype;
94 __u8 bClockID;
95 __u8 bNrInPins;
96 __u8 baCSourceID[];
97 /* bmControls, bAssocTerminal and iClockSource omitted */
98} __attribute__((packed));
99
100/* 4.7.2.3 Clock Multiplier Descriptor */
101
102struct uac_clock_multiplier_descriptor {
103 __u8 bLength;
104 __u8 bDescriptorType;
105 __u8 bDescriptorSubtype;
106 __u8 bClockID;
107 __u8 bCSourceID;
108 __u8 bmControls;
109 __u8 iClockMultiplier;
110} __attribute__((packed));
111
112/* 4.7.2.4 Input terminal descriptor */
113
114struct uac2_input_terminal_descriptor {
115 __u8 bLength;
116 __u8 bDescriptorType;
117 __u8 bDescriptorSubtype;
118 __u8 bTerminalID;
119 __le16 wTerminalType;
120 __u8 bAssocTerminal;
121 __u8 bCSourceID;
122 __u8 bNrChannels;
123 __le32 bmChannelConfig;
124 __u8 iChannelNames;
125 __le16 bmControls;
126 __u8 iTerminal;
127} __attribute__((packed));
128
129/* 4.7.2.5 Output terminal descriptor */
130
131struct uac2_output_terminal_descriptor {
132 __u8 bLength;
133 __u8 bDescriptorType;
134 __u8 bDescriptorSubtype;
135 __u8 bTerminalID;
136 __le16 wTerminalType;
137 __u8 bAssocTerminal;
138 __u8 bSourceID;
139 __u8 bCSourceID;
140 __le16 bmControls;
141 __u8 iTerminal;
142} __attribute__((packed));
143
144
145
146/* 4.7.2.8 Feature Unit Descriptor */
147
148struct uac2_feature_unit_descriptor {
149 __u8 bLength;
150 __u8 bDescriptorType;
151 __u8 bDescriptorSubtype;
152 __u8 bUnitID;
153 __u8 bSourceID;
154 /* bmaControls is actually u32,
155 * but u8 is needed for the hybrid parser */
156 __u8 bmaControls[0]; /* variable length */
157} __attribute__((packed));
158
159/* 4.9.2 Class-Specific AS Interface Descriptor */
160
161struct uac2_as_header_descriptor {
162 __u8 bLength;
163 __u8 bDescriptorType;
164 __u8 bDescriptorSubtype;
165 __u8 bTerminalLink;
166 __u8 bmControls;
167 __u8 bFormatType;
168 __le32 bmFormats;
169 __u8 bNrChannels;
170 __le32 bmChannelConfig;
171 __u8 iChannelNames;
172} __attribute__((packed));
173
174#define UAC2_FORMAT_TYPE_I_RAW_DATA (1 << 31)
175
176/* 4.10.1.2 Class-Specific AS Isochronous Audio Data Endpoint Descriptor */
177
178struct uac2_iso_endpoint_descriptor {
179 __u8 bLength; /* in bytes: 8 */
180 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */
181 __u8 bDescriptorSubtype; /* EP_GENERAL */
182 __u8 bmAttributes;
183 __u8 bmControls;
184 __u8 bLockDelayUnits;
185 __le16 wLockDelay;
186} __attribute__((packed));
187
188#define UAC2_CONTROL_PITCH (3 << 0)
189#define UAC2_CONTROL_DATA_OVERRUN (3 << 2)
190#define UAC2_CONTROL_DATA_UNDERRUN (3 << 4)
191
192/* 6.1 Interrupt Data Message */
193
194#define UAC2_INTERRUPT_DATA_MSG_VENDOR (1 << 0)
195#define UAC2_INTERRUPT_DATA_MSG_EP (1 << 1)
196
197struct uac2_interrupt_data_msg {
198 __u8 bInfo;
199 __u8 bAttribute;
200 __le16 wValue;
201 __le16 wIndex;
202} __attribute__((packed));
203
204/* A.7 Audio Function Category Codes */
205#define UAC2_FUNCTION_SUBCLASS_UNDEFINED 0x00
206#define UAC2_FUNCTION_DESKTOP_SPEAKER 0x01
207#define UAC2_FUNCTION_HOME_THEATER 0x02
208#define UAC2_FUNCTION_MICROPHONE 0x03
209#define UAC2_FUNCTION_HEADSET 0x04
210#define UAC2_FUNCTION_TELEPHONE 0x05
211#define UAC2_FUNCTION_CONVERTER 0x06
212#define UAC2_FUNCTION_SOUND_RECORDER 0x07
213#define UAC2_FUNCTION_IO_BOX 0x08
214#define UAC2_FUNCTION_MUSICAL_INSTRUMENT 0x09
215#define UAC2_FUNCTION_PRO_AUDIO 0x0a
216#define UAC2_FUNCTION_AUDIO_VIDEO 0x0b
217#define UAC2_FUNCTION_CONTROL_PANEL 0x0c
218#define UAC2_FUNCTION_OTHER 0xff
219
220/* A.9 Audio Class-Specific AC Interface Descriptor Subtypes */
221/* see audio.h for the rest, which is identical to v1 */
222#define UAC2_EFFECT_UNIT 0x07
223#define UAC2_PROCESSING_UNIT_V2 0x08
224#define UAC2_EXTENSION_UNIT_V2 0x09
225#define UAC2_CLOCK_SOURCE 0x0a
226#define UAC2_CLOCK_SELECTOR 0x0b
227#define UAC2_CLOCK_MULTIPLIER 0x0c
228#define UAC2_SAMPLE_RATE_CONVERTER 0x0d
229
230/* A.10 Audio Class-Specific AS Interface Descriptor Subtypes */
231/* see audio.h for the rest, which is identical to v1 */
232#define UAC2_ENCODER 0x03
233#define UAC2_DECODER 0x04
234
235/* A.11 Effect Unit Effect Types */
236#define UAC2_EFFECT_UNDEFINED 0x00
237#define UAC2_EFFECT_PARAM_EQ 0x01
238#define UAC2_EFFECT_REVERB 0x02
239#define UAC2_EFFECT_MOD_DELAY 0x03
240#define UAC2_EFFECT_DYN_RANGE_COMP 0x04
241
242/* A.12 Processing Unit Process Types */
243#define UAC2_PROCESS_UNDEFINED 0x00
244#define UAC2_PROCESS_UP_DOWNMIX 0x01
245#define UAC2_PROCESS_DOLBY_PROLOCIC 0x02
246#define UAC2_PROCESS_STEREO_EXTENDER 0x03
247
248/* A.14 Audio Class-Specific Request Codes */
249#define UAC2_CS_CUR 0x01
250#define UAC2_CS_RANGE 0x02
251#define UAC2_CS_MEM 0x03
252
253/* A.15 Encoder Type Codes */
254#define UAC2_ENCODER_UNDEFINED 0x00
255#define UAC2_ENCODER_OTHER 0x01
256#define UAC2_ENCODER_MPEG 0x02
257#define UAC2_ENCODER_AC3 0x03
258#define UAC2_ENCODER_WMA 0x04
259#define UAC2_ENCODER_DTS 0x05
260
261/* A.16 Decoder Type Codes */
262#define UAC2_DECODER_UNDEFINED 0x00
263#define UAC2_DECODER_OTHER 0x01
264#define UAC2_DECODER_MPEG 0x02
265#define UAC2_DECODER_AC3 0x03
266#define UAC2_DECODER_WMA 0x04
267#define UAC2_DECODER_DTS 0x05
268
269/* A.17.1 Clock Source Control Selectors */
270#define UAC2_CS_UNDEFINED 0x00
271#define UAC2_CS_CONTROL_SAM_FREQ 0x01
272#define UAC2_CS_CONTROL_CLOCK_VALID 0x02
273
274/* A.17.2 Clock Selector Control Selectors */
275#define UAC2_CX_UNDEFINED 0x00
276#define UAC2_CX_CLOCK_SELECTOR 0x01
277
278/* A.17.3 Clock Multiplier Control Selectors */
279#define UAC2_CM_UNDEFINED 0x00
280#define UAC2_CM_NUMERATOR 0x01
281#define UAC2_CM_DENOMINTATOR 0x02
282
283/* A.17.4 Terminal Control Selectors */
284#define UAC2_TE_UNDEFINED 0x00
285#define UAC2_TE_COPY_PROTECT 0x01
286#define UAC2_TE_CONNECTOR 0x02
287#define UAC2_TE_OVERLOAD 0x03
288#define UAC2_TE_CLUSTER 0x04
289#define UAC2_TE_UNDERFLOW 0x05
290#define UAC2_TE_OVERFLOW 0x06
291#define UAC2_TE_LATENCY 0x07
292
293/* A.17.5 Mixer Control Selectors */
294#define UAC2_MU_UNDEFINED 0x00
295#define UAC2_MU_MIXER 0x01
296#define UAC2_MU_CLUSTER 0x02
297#define UAC2_MU_UNDERFLOW 0x03
298#define UAC2_MU_OVERFLOW 0x04
299#define UAC2_MU_LATENCY 0x05
300
301/* A.17.6 Selector Control Selectors */
302#define UAC2_SU_UNDEFINED 0x00
303#define UAC2_SU_SELECTOR 0x01
304#define UAC2_SU_LATENCY 0x02
305
306/* A.17.7 Feature Unit Control Selectors */
307/* see audio.h for the rest, which is identical to v1 */
308#define UAC2_FU_INPUT_GAIN 0x0b
309#define UAC2_FU_INPUT_GAIN_PAD 0x0c
310#define UAC2_FU_PHASE_INVERTER 0x0d
311#define UAC2_FU_UNDERFLOW 0x0e
312#define UAC2_FU_OVERFLOW 0x0f
313#define UAC2_FU_LATENCY 0x10
314
315/* A.17.8.1 Parametric Equalizer Section Effect Unit Control Selectors */
316#define UAC2_PE_UNDEFINED 0x00
317#define UAC2_PE_ENABLE 0x01
318#define UAC2_PE_CENTERFREQ 0x02
319#define UAC2_PE_QFACTOR 0x03
320#define UAC2_PE_GAIN 0x04
321#define UAC2_PE_UNDERFLOW 0x05
322#define UAC2_PE_OVERFLOW 0x06
323#define UAC2_PE_LATENCY 0x07
324
325/* A.17.8.2 Reverberation Effect Unit Control Selectors */
326#define UAC2_RV_UNDEFINED 0x00
327#define UAC2_RV_ENABLE 0x01
328#define UAC2_RV_TYPE 0x02
329#define UAC2_RV_LEVEL 0x03
330#define UAC2_RV_TIME 0x04
331#define UAC2_RV_FEEDBACK 0x05
332#define UAC2_RV_PREDELAY 0x06
333#define UAC2_RV_DENSITY 0x07
334#define UAC2_RV_HIFREQ_ROLLOFF 0x08
335#define UAC2_RV_UNDERFLOW 0x09
336#define UAC2_RV_OVERFLOW 0x0a
337#define UAC2_RV_LATENCY 0x0b
338
339/* A.17.8.3 Modulation Delay Effect Control Selectors */
340#define UAC2_MD_UNDEFINED 0x00
341#define UAC2_MD_ENABLE 0x01
342#define UAC2_MD_BALANCE 0x02
343#define UAC2_MD_RATE 0x03
344#define UAC2_MD_DEPTH 0x04
345#define UAC2_MD_TIME 0x05
346#define UAC2_MD_FEEDBACK 0x06
347#define UAC2_MD_UNDERFLOW 0x07
348#define UAC2_MD_OVERFLOW 0x08
349#define UAC2_MD_LATENCY 0x09
350
351/* A.17.8.4 Dynamic Range Compressor Effect Unit Control Selectors */
352#define UAC2_DR_UNDEFINED 0x00
353#define UAC2_DR_ENABLE 0x01
354#define UAC2_DR_COMPRESSION_RATE 0x02
355#define UAC2_DR_MAXAMPL 0x03
356#define UAC2_DR_THRESHOLD 0x04
357#define UAC2_DR_ATTACK_TIME 0x05
358#define UAC2_DR_RELEASE_TIME 0x06
359#define UAC2_DR_UNDEFLOW 0x07
360#define UAC2_DR_OVERFLOW 0x08
361#define UAC2_DR_LATENCY 0x09
362
363/* A.17.9.1 Up/Down-mix Processing Unit Control Selectors */
364#define UAC2_UD_UNDEFINED 0x00
365#define UAC2_UD_ENABLE 0x01
366#define UAC2_UD_MODE_SELECT 0x02
367#define UAC2_UD_CLUSTER 0x03
368#define UAC2_UD_UNDERFLOW 0x04
369#define UAC2_UD_OVERFLOW 0x05
370#define UAC2_UD_LATENCY 0x06
371
372/* A.17.9.2 Dolby Prologic[tm] Processing Unit Control Selectors */
373#define UAC2_DP_UNDEFINED 0x00
374#define UAC2_DP_ENABLE 0x01
375#define UAC2_DP_MODE_SELECT 0x02
376#define UAC2_DP_CLUSTER 0x03
377#define UAC2_DP_UNDERFFLOW 0x04
378#define UAC2_DP_OVERFLOW 0x05
379#define UAC2_DP_LATENCY 0x06
380
381/* A.17.9.3 Stereo Expander Processing Unit Control Selectors */
382#define UAC2_ST_EXT_UNDEFINED 0x00
383#define UAC2_ST_EXT_ENABLE 0x01
384#define UAC2_ST_EXT_WIDTH 0x02
385#define UAC2_ST_EXT_UNDEFLOW 0x03
386#define UAC2_ST_EXT_OVERFLOW 0x04
387#define UAC2_ST_EXT_LATENCY 0x05
388
389/* A.17.10 Extension Unit Control Selectors */
390#define UAC2_XU_UNDEFINED 0x00
391#define UAC2_XU_ENABLE 0x01
392#define UAC2_XU_CLUSTER 0x02
393#define UAC2_XU_UNDERFLOW 0x03
394#define UAC2_XU_OVERFLOW 0x04
395#define UAC2_XU_LATENCY 0x05
396
397/* A.17.11 AudioStreaming Interface Control Selectors */
398#define UAC2_AS_UNDEFINED 0x00
399#define UAC2_AS_ACT_ALT_SETTING 0x01
400#define UAC2_AS_VAL_ALT_SETTINGS 0x02
401#define UAC2_AS_AUDIO_DATA_FORMAT 0x03
402
403/* A.17.12 Encoder Control Selectors */
404#define UAC2_EN_UNDEFINED 0x00
405#define UAC2_EN_BIT_RATE 0x01
406#define UAC2_EN_QUALITY 0x02
407#define UAC2_EN_VBR 0x03
408#define UAC2_EN_TYPE 0x04
409#define UAC2_EN_UNDERFLOW 0x05
410#define UAC2_EN_OVERFLOW 0x06
411#define UAC2_EN_ENCODER_ERROR 0x07
412#define UAC2_EN_PARAM1 0x08
413#define UAC2_EN_PARAM2 0x09
414#define UAC2_EN_PARAM3 0x0a
415#define UAC2_EN_PARAM4 0x0b
416#define UAC2_EN_PARAM5 0x0c
417#define UAC2_EN_PARAM6 0x0d
418#define UAC2_EN_PARAM7 0x0e
419#define UAC2_EN_PARAM8 0x0f
420
421/* A.17.13.1 MPEG Decoder Control Selectors */
422#define UAC2_MPEG_UNDEFINED 0x00
423#define UAC2_MPEG_DUAL_CHANNEL 0x01
424#define UAC2_MPEG_SECOND_STEREO 0x02
425#define UAC2_MPEG_MULTILINGUAL 0x03
426#define UAC2_MPEG_DYN_RANGE 0x04
427#define UAC2_MPEG_SCALING 0x05
428#define UAC2_MPEG_HILO_SCALING 0x06
429#define UAC2_MPEG_UNDERFLOW 0x07
430#define UAC2_MPEG_OVERFLOW 0x08
431#define UAC2_MPEG_DECODER_ERROR 0x09
432
433/* A17.13.2 AC3 Decoder Control Selectors */
434#define UAC2_AC3_UNDEFINED 0x00
435#define UAC2_AC3_MODE 0x01
436#define UAC2_AC3_DYN_RANGE 0x02
437#define UAC2_AC3_SCALING 0x03
438#define UAC2_AC3_HILO_SCALING 0x04
439#define UAC2_AC3_UNDERFLOW 0x05
440#define UAC2_AC3_OVERFLOW 0x06
441#define UAC2_AC3_DECODER_ERROR 0x07
442
443/* A17.13.3 WMA Decoder Control Selectors */
444#define UAC2_WMA_UNDEFINED 0x00
445#define UAC2_WMA_UNDERFLOW 0x01
446#define UAC2_WMA_OVERFLOW 0x02
447#define UAC2_WMA_DECODER_ERROR 0x03
448
449/* A17.13.4 DTS Decoder Control Selectors */
450#define UAC2_DTS_UNDEFINED 0x00
451#define UAC2_DTS_UNDERFLOW 0x01
452#define UAC2_DTS_OVERFLOW 0x02
453#define UAC2_DTS_DECODER_ERROR 0x03
454
455/* A17.14 Endpoint Control Selectors */
456#define UAC2_EP_CS_UNDEFINED 0x00
457#define UAC2_EP_CS_PITCH 0x01
458#define UAC2_EP_CS_DATA_OVERRUN 0x02
459#define UAC2_EP_CS_DATA_UNDERRUN 0x03
460
461#endif /* __LINUX_USB_AUDIO_V2_H */
462