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 _UAPI__LINUX_USB_AUDIO_H
23 #define _UAPI__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 */
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));
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)			\
170 struct 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 */
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;
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 */
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*/
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)			\
246 struct 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 */
258 struct 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 
uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor * desc)267 static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
268 {
269 	return desc->baSourceID[desc->bNrInPins];
270 }
271 
uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor * desc,int protocol)272 static 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 
uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor * desc,int protocol)285 static 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 
uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor * desc,int protocol)293 static 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 
uac3_mixer_unit_wClusterDescrID(struct uac_mixer_unit_descriptor * desc)308 static 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 
uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor * desc)314 static 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 */
321 struct 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 
uac_selector_unit_iSelector(struct uac_selector_unit_descriptor * desc)330 static 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 */
337 struct 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 
uac_feature_unit_iFeature(struct uac_feature_unit_descriptor * desc)347 static 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 */
354 struct 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 
uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor * desc)364 static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
365 {
366 	return desc->baSourceID[desc->bNrInPins];
367 }
368 
uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor * desc,int protocol)369 static 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 
uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor * desc,int protocol)382 static 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 
uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor * desc,int protocol)390 static 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 
uac_processing_unit_bmControls(struct uac_processing_unit_descriptor * desc,int protocol)405 static 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 
uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor * desc,int protocol)420 static 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 
uac_processing_unit_specific(struct uac_processing_unit_descriptor * desc,int protocol)436 static 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  */
uac_extension_unit_bControlSize(struct uac_processing_unit_descriptor * desc,int protocol)459 static 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 
uac_extension_unit_iExtension(struct uac_processing_unit_descriptor * desc,int protocol)474 static 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 */
491 struct 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 
510 struct 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 
525 struct 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)		\
538 struct 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 
552 struct 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 
569 struct 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 
580 struct 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 
608 struct 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 
632 struct uac1_status_word {
633 	__u8 bStatusType;
634 	__u8 bOriginator;
635 } __attribute__((packed));
636 
637 
638 #endif /* _UAPI__LINUX_USB_AUDIO_H */
639