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
uac_v2v3_control_is_readable(u32 bmControls,u8 control)37 static inline bool uac_v2v3_control_is_readable(u32 bmControls, u8 control)
38 {
39 return (bmControls >> ((control - 1) * 2)) & 0x1;
40 }
41
uac_v2v3_control_is_writeable(u32 bmControls,u8 control)42 static 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 */
48 struct 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)*/
59 struct 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
70 struct 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
90 struct uac_clock_selector_descriptor {
91 __u8 bLength;
92 __u8 bDescriptorType;
93 __u8 bDescriptorSubtype;
94 __u8 bClockID;
95 __u8 bNrInPins;
96 __u8 baCSourceID[];
97 /* bmControls and iClockSource omitted */
98 } __attribute__((packed));
99
100 /* 4.7.2.3 Clock Multiplier Descriptor */
101
102 struct 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
114 struct 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
131 struct 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
148 struct 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
161 struct 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
178 struct 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 /* 5.2.5.4.2 Connector Control Parameter Block */
193 struct uac2_connectors_ctl_blk {
194 __u8 bNrChannels;
195 __le32 bmChannelConfig;
196 __u8 iChannelNames;
197 } __attribute__((packed));
198
199 /* 6.1 Interrupt Data Message */
200
201 #define UAC2_INTERRUPT_DATA_MSG_VENDOR (1 << 0)
202 #define UAC2_INTERRUPT_DATA_MSG_EP (1 << 1)
203
204 struct uac2_interrupt_data_msg {
205 __u8 bInfo;
206 __u8 bAttribute;
207 __le16 wValue;
208 __le16 wIndex;
209 } __attribute__((packed));
210
211 /* A.7 Audio Function Category Codes */
212 #define UAC2_FUNCTION_SUBCLASS_UNDEFINED 0x00
213 #define UAC2_FUNCTION_DESKTOP_SPEAKER 0x01
214 #define UAC2_FUNCTION_HOME_THEATER 0x02
215 #define UAC2_FUNCTION_MICROPHONE 0x03
216 #define UAC2_FUNCTION_HEADSET 0x04
217 #define UAC2_FUNCTION_TELEPHONE 0x05
218 #define UAC2_FUNCTION_CONVERTER 0x06
219 #define UAC2_FUNCTION_SOUND_RECORDER 0x07
220 #define UAC2_FUNCTION_IO_BOX 0x08
221 #define UAC2_FUNCTION_MUSICAL_INSTRUMENT 0x09
222 #define UAC2_FUNCTION_PRO_AUDIO 0x0a
223 #define UAC2_FUNCTION_AUDIO_VIDEO 0x0b
224 #define UAC2_FUNCTION_CONTROL_PANEL 0x0c
225 #define UAC2_FUNCTION_OTHER 0xff
226
227 /* A.9 Audio Class-Specific AC Interface Descriptor Subtypes */
228 /* see audio.h for the rest, which is identical to v1 */
229 #define UAC2_EFFECT_UNIT 0x07
230 #define UAC2_PROCESSING_UNIT_V2 0x08
231 #define UAC2_EXTENSION_UNIT_V2 0x09
232 #define UAC2_CLOCK_SOURCE 0x0a
233 #define UAC2_CLOCK_SELECTOR 0x0b
234 #define UAC2_CLOCK_MULTIPLIER 0x0c
235 #define UAC2_SAMPLE_RATE_CONVERTER 0x0d
236
237 /* A.10 Audio Class-Specific AS Interface Descriptor Subtypes */
238 /* see audio.h for the rest, which is identical to v1 */
239 #define UAC2_ENCODER 0x03
240 #define UAC2_DECODER 0x04
241
242 /* A.11 Effect Unit Effect Types */
243 #define UAC2_EFFECT_UNDEFINED 0x00
244 #define UAC2_EFFECT_PARAM_EQ 0x01
245 #define UAC2_EFFECT_REVERB 0x02
246 #define UAC2_EFFECT_MOD_DELAY 0x03
247 #define UAC2_EFFECT_DYN_RANGE_COMP 0x04
248
249 /* A.12 Processing Unit Process Types */
250 #define UAC2_PROCESS_UNDEFINED 0x00
251 #define UAC2_PROCESS_UP_DOWNMIX 0x01
252 #define UAC2_PROCESS_DOLBY_PROLOCIC 0x02
253 #define UAC2_PROCESS_STEREO_EXTENDER 0x03
254
255 /* A.14 Audio Class-Specific Request Codes */
256 #define UAC2_CS_CUR 0x01
257 #define UAC2_CS_RANGE 0x02
258 #define UAC2_CS_MEM 0x03
259
260 /* A.15 Encoder Type Codes */
261 #define UAC2_ENCODER_UNDEFINED 0x00
262 #define UAC2_ENCODER_OTHER 0x01
263 #define UAC2_ENCODER_MPEG 0x02
264 #define UAC2_ENCODER_AC3 0x03
265 #define UAC2_ENCODER_WMA 0x04
266 #define UAC2_ENCODER_DTS 0x05
267
268 /* A.16 Decoder Type Codes */
269 #define UAC2_DECODER_UNDEFINED 0x00
270 #define UAC2_DECODER_OTHER 0x01
271 #define UAC2_DECODER_MPEG 0x02
272 #define UAC2_DECODER_AC3 0x03
273 #define UAC2_DECODER_WMA 0x04
274 #define UAC2_DECODER_DTS 0x05
275
276 /* A.17.1 Clock Source Control Selectors */
277 #define UAC2_CS_UNDEFINED 0x00
278 #define UAC2_CS_CONTROL_SAM_FREQ 0x01
279 #define UAC2_CS_CONTROL_CLOCK_VALID 0x02
280
281 /* A.17.2 Clock Selector Control Selectors */
282 #define UAC2_CX_UNDEFINED 0x00
283 #define UAC2_CX_CLOCK_SELECTOR 0x01
284
285 /* A.17.3 Clock Multiplier Control Selectors */
286 #define UAC2_CM_UNDEFINED 0x00
287 #define UAC2_CM_NUMERATOR 0x01
288 #define UAC2_CM_DENOMINTATOR 0x02
289
290 /* A.17.4 Terminal Control Selectors */
291 #define UAC2_TE_UNDEFINED 0x00
292 #define UAC2_TE_COPY_PROTECT 0x01
293 #define UAC2_TE_CONNECTOR 0x02
294 #define UAC2_TE_OVERLOAD 0x03
295 #define UAC2_TE_CLUSTER 0x04
296 #define UAC2_TE_UNDERFLOW 0x05
297 #define UAC2_TE_OVERFLOW 0x06
298 #define UAC2_TE_LATENCY 0x07
299
300 /* A.17.5 Mixer Control Selectors */
301 #define UAC2_MU_UNDEFINED 0x00
302 #define UAC2_MU_MIXER 0x01
303 #define UAC2_MU_CLUSTER 0x02
304 #define UAC2_MU_UNDERFLOW 0x03
305 #define UAC2_MU_OVERFLOW 0x04
306 #define UAC2_MU_LATENCY 0x05
307
308 /* A.17.6 Selector Control Selectors */
309 #define UAC2_SU_UNDEFINED 0x00
310 #define UAC2_SU_SELECTOR 0x01
311 #define UAC2_SU_LATENCY 0x02
312
313 /* A.17.7 Feature Unit Control Selectors */
314 /* see audio.h for the rest, which is identical to v1 */
315 #define UAC2_FU_INPUT_GAIN 0x0b
316 #define UAC2_FU_INPUT_GAIN_PAD 0x0c
317 #define UAC2_FU_PHASE_INVERTER 0x0d
318 #define UAC2_FU_UNDERFLOW 0x0e
319 #define UAC2_FU_OVERFLOW 0x0f
320 #define UAC2_FU_LATENCY 0x10
321
322 /* A.17.8.1 Parametric Equalizer Section Effect Unit Control Selectors */
323 #define UAC2_PE_UNDEFINED 0x00
324 #define UAC2_PE_ENABLE 0x01
325 #define UAC2_PE_CENTERFREQ 0x02
326 #define UAC2_PE_QFACTOR 0x03
327 #define UAC2_PE_GAIN 0x04
328 #define UAC2_PE_UNDERFLOW 0x05
329 #define UAC2_PE_OVERFLOW 0x06
330 #define UAC2_PE_LATENCY 0x07
331
332 /* A.17.8.2 Reverberation Effect Unit Control Selectors */
333 #define UAC2_RV_UNDEFINED 0x00
334 #define UAC2_RV_ENABLE 0x01
335 #define UAC2_RV_TYPE 0x02
336 #define UAC2_RV_LEVEL 0x03
337 #define UAC2_RV_TIME 0x04
338 #define UAC2_RV_FEEDBACK 0x05
339 #define UAC2_RV_PREDELAY 0x06
340 #define UAC2_RV_DENSITY 0x07
341 #define UAC2_RV_HIFREQ_ROLLOFF 0x08
342 #define UAC2_RV_UNDERFLOW 0x09
343 #define UAC2_RV_OVERFLOW 0x0a
344 #define UAC2_RV_LATENCY 0x0b
345
346 /* A.17.8.3 Modulation Delay Effect Control Selectors */
347 #define UAC2_MD_UNDEFINED 0x00
348 #define UAC2_MD_ENABLE 0x01
349 #define UAC2_MD_BALANCE 0x02
350 #define UAC2_MD_RATE 0x03
351 #define UAC2_MD_DEPTH 0x04
352 #define UAC2_MD_TIME 0x05
353 #define UAC2_MD_FEEDBACK 0x06
354 #define UAC2_MD_UNDERFLOW 0x07
355 #define UAC2_MD_OVERFLOW 0x08
356 #define UAC2_MD_LATENCY 0x09
357
358 /* A.17.8.4 Dynamic Range Compressor Effect Unit Control Selectors */
359 #define UAC2_DR_UNDEFINED 0x00
360 #define UAC2_DR_ENABLE 0x01
361 #define UAC2_DR_COMPRESSION_RATE 0x02
362 #define UAC2_DR_MAXAMPL 0x03
363 #define UAC2_DR_THRESHOLD 0x04
364 #define UAC2_DR_ATTACK_TIME 0x05
365 #define UAC2_DR_RELEASE_TIME 0x06
366 #define UAC2_DR_UNDEFLOW 0x07
367 #define UAC2_DR_OVERFLOW 0x08
368 #define UAC2_DR_LATENCY 0x09
369
370 /* A.17.9.1 Up/Down-mix Processing Unit Control Selectors */
371 #define UAC2_UD_UNDEFINED 0x00
372 #define UAC2_UD_ENABLE 0x01
373 #define UAC2_UD_MODE_SELECT 0x02
374 #define UAC2_UD_CLUSTER 0x03
375 #define UAC2_UD_UNDERFLOW 0x04
376 #define UAC2_UD_OVERFLOW 0x05
377 #define UAC2_UD_LATENCY 0x06
378
379 /* A.17.9.2 Dolby Prologic[tm] Processing Unit Control Selectors */
380 #define UAC2_DP_UNDEFINED 0x00
381 #define UAC2_DP_ENABLE 0x01
382 #define UAC2_DP_MODE_SELECT 0x02
383 #define UAC2_DP_CLUSTER 0x03
384 #define UAC2_DP_UNDERFFLOW 0x04
385 #define UAC2_DP_OVERFLOW 0x05
386 #define UAC2_DP_LATENCY 0x06
387
388 /* A.17.9.3 Stereo Expander Processing Unit Control Selectors */
389 #define UAC2_ST_EXT_UNDEFINED 0x00
390 #define UAC2_ST_EXT_ENABLE 0x01
391 #define UAC2_ST_EXT_WIDTH 0x02
392 #define UAC2_ST_EXT_UNDEFLOW 0x03
393 #define UAC2_ST_EXT_OVERFLOW 0x04
394 #define UAC2_ST_EXT_LATENCY 0x05
395
396 /* A.17.10 Extension Unit Control Selectors */
397 #define UAC2_XU_UNDEFINED 0x00
398 #define UAC2_XU_ENABLE 0x01
399 #define UAC2_XU_CLUSTER 0x02
400 #define UAC2_XU_UNDERFLOW 0x03
401 #define UAC2_XU_OVERFLOW 0x04
402 #define UAC2_XU_LATENCY 0x05
403
404 /* A.17.11 AudioStreaming Interface Control Selectors */
405 #define UAC2_AS_UNDEFINED 0x00
406 #define UAC2_AS_ACT_ALT_SETTING 0x01
407 #define UAC2_AS_VAL_ALT_SETTINGS 0x02
408 #define UAC2_AS_AUDIO_DATA_FORMAT 0x03
409
410 /* A.17.12 Encoder Control Selectors */
411 #define UAC2_EN_UNDEFINED 0x00
412 #define UAC2_EN_BIT_RATE 0x01
413 #define UAC2_EN_QUALITY 0x02
414 #define UAC2_EN_VBR 0x03
415 #define UAC2_EN_TYPE 0x04
416 #define UAC2_EN_UNDERFLOW 0x05
417 #define UAC2_EN_OVERFLOW 0x06
418 #define UAC2_EN_ENCODER_ERROR 0x07
419 #define UAC2_EN_PARAM1 0x08
420 #define UAC2_EN_PARAM2 0x09
421 #define UAC2_EN_PARAM3 0x0a
422 #define UAC2_EN_PARAM4 0x0b
423 #define UAC2_EN_PARAM5 0x0c
424 #define UAC2_EN_PARAM6 0x0d
425 #define UAC2_EN_PARAM7 0x0e
426 #define UAC2_EN_PARAM8 0x0f
427
428 /* A.17.13.1 MPEG Decoder Control Selectors */
429 #define UAC2_MPEG_UNDEFINED 0x00
430 #define UAC2_MPEG_DUAL_CHANNEL 0x01
431 #define UAC2_MPEG_SECOND_STEREO 0x02
432 #define UAC2_MPEG_MULTILINGUAL 0x03
433 #define UAC2_MPEG_DYN_RANGE 0x04
434 #define UAC2_MPEG_SCALING 0x05
435 #define UAC2_MPEG_HILO_SCALING 0x06
436 #define UAC2_MPEG_UNDERFLOW 0x07
437 #define UAC2_MPEG_OVERFLOW 0x08
438 #define UAC2_MPEG_DECODER_ERROR 0x09
439
440 /* A17.13.2 AC3 Decoder Control Selectors */
441 #define UAC2_AC3_UNDEFINED 0x00
442 #define UAC2_AC3_MODE 0x01
443 #define UAC2_AC3_DYN_RANGE 0x02
444 #define UAC2_AC3_SCALING 0x03
445 #define UAC2_AC3_HILO_SCALING 0x04
446 #define UAC2_AC3_UNDERFLOW 0x05
447 #define UAC2_AC3_OVERFLOW 0x06
448 #define UAC2_AC3_DECODER_ERROR 0x07
449
450 /* A17.13.3 WMA Decoder Control Selectors */
451 #define UAC2_WMA_UNDEFINED 0x00
452 #define UAC2_WMA_UNDERFLOW 0x01
453 #define UAC2_WMA_OVERFLOW 0x02
454 #define UAC2_WMA_DECODER_ERROR 0x03
455
456 /* A17.13.4 DTS Decoder Control Selectors */
457 #define UAC2_DTS_UNDEFINED 0x00
458 #define UAC2_DTS_UNDERFLOW 0x01
459 #define UAC2_DTS_OVERFLOW 0x02
460 #define UAC2_DTS_DECODER_ERROR 0x03
461
462 /* A17.14 Endpoint Control Selectors */
463 #define UAC2_EP_CS_UNDEFINED 0x00
464 #define UAC2_EP_CS_PITCH 0x01
465 #define UAC2_EP_CS_DATA_OVERRUN 0x02
466 #define UAC2_EP_CS_DATA_UNDERRUN 0x03
467
468 #endif /* __LINUX_USB_AUDIO_V2_H */
469
470