1 /*
2 * <linux/usb/audio.h> -- USB Audio definitions.
3 *
4 * Copyright (C) 2006 Thumtronics Pty Ltd.
5 * Developed for Thumtronics by Grey Innovation
6 * Ben Williamson <ben.williamson@greyinnovation.com>
7 *
8 * This software is distributed under the terms of the GNU General Public
9 * License ("GPL") version 2, as published by the Free Software Foundation.
10 *
11 * This file holds USB constants and structures defined
12 * by the USB Device Class Definition for Audio Devices.
13 * Comments below reference relevant sections of that document:
14 *
15 * http://www.usb.org/developers/devclass_docs/audio10.pdf
16 *
17 * Types and defines in this file are either specific to version 1.0 of
18 * this standard or common for newer versions.
19 */
20
21 #ifndef __LINUX_USB_AUDIO_H
22 #define __LINUX_USB_AUDIO_H
23
24 #include <linux/types.h>
25
26 /* bInterfaceProtocol values to denote the version of the standard used */
27 #define UAC_VERSION_1 0x00
28 #define UAC_VERSION_2 0x20
29
30 /* A.2 Audio Interface Subclass Codes */
31 #define USB_SUBCLASS_AUDIOCONTROL 0x01
32 #define USB_SUBCLASS_AUDIOSTREAMING 0x02
33 #define USB_SUBCLASS_MIDISTREAMING 0x03
34
35 /* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
36 #define UAC_HEADER 0x01
37 #define UAC_INPUT_TERMINAL 0x02
38 #define UAC_OUTPUT_TERMINAL 0x03
39 #define UAC_MIXER_UNIT 0x04
40 #define UAC_SELECTOR_UNIT 0x05
41 #define UAC_FEATURE_UNIT 0x06
42 #define UAC1_PROCESSING_UNIT 0x07
43 #define UAC1_EXTENSION_UNIT 0x08
44
45 /* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */
46 #define UAC_AS_GENERAL 0x01
47 #define UAC_FORMAT_TYPE 0x02
48 #define UAC_FORMAT_SPECIFIC 0x03
49
50 /* A.7 Processing Unit Process Types */
51 #define UAC_PROCESS_UNDEFINED 0x00
52 #define UAC_PROCESS_UP_DOWNMIX 0x01
53 #define UAC_PROCESS_DOLBY_PROLOGIC 0x02
54 #define UAC_PROCESS_STEREO_EXTENDER 0x03
55 #define UAC_PROCESS_REVERB 0x04
56 #define UAC_PROCESS_CHORUS 0x05
57 #define UAC_PROCESS_DYN_RANGE_COMP 0x06
58
59 /* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */
60 #define UAC_EP_GENERAL 0x01
61
62 /* A.9 Audio Class-Specific Request Codes */
63 #define UAC_SET_ 0x00
64 #define UAC_GET_ 0x80
65
66 #define UAC__CUR 0x1
67 #define UAC__MIN 0x2
68 #define UAC__MAX 0x3
69 #define UAC__RES 0x4
70 #define UAC__MEM 0x5
71
72 #define UAC_SET_CUR (UAC_SET_ | UAC__CUR)
73 #define UAC_GET_CUR (UAC_GET_ | UAC__CUR)
74 #define UAC_SET_MIN (UAC_SET_ | UAC__MIN)
75 #define UAC_GET_MIN (UAC_GET_ | UAC__MIN)
76 #define UAC_SET_MAX (UAC_SET_ | UAC__MAX)
77 #define UAC_GET_MAX (UAC_GET_ | UAC__MAX)
78 #define UAC_SET_RES (UAC_SET_ | UAC__RES)
79 #define UAC_GET_RES (UAC_GET_ | UAC__RES)
80 #define UAC_SET_MEM (UAC_SET_ | UAC__MEM)
81 #define UAC_GET_MEM (UAC_GET_ | UAC__MEM)
82
83 #define UAC_GET_STAT 0xff
84
85 /* A.10 Control Selector Codes */
86
87 /* A.10.1 Terminal Control Selectors */
88 #define UAC_TERM_COPY_PROTECT 0x01
89
90 /* A.10.2 Feature Unit Control Selectors */
91 #define UAC_FU_MUTE 0x01
92 #define UAC_FU_VOLUME 0x02
93 #define UAC_FU_BASS 0x03
94 #define UAC_FU_MID 0x04
95 #define UAC_FU_TREBLE 0x05
96 #define UAC_FU_GRAPHIC_EQUALIZER 0x06
97 #define UAC_FU_AUTOMATIC_GAIN 0x07
98 #define UAC_FU_DELAY 0x08
99 #define UAC_FU_BASS_BOOST 0x09
100 #define UAC_FU_LOUDNESS 0x0a
101
102 #define UAC_CONTROL_BIT(CS) (1 << ((CS) - 1))
103
104 /* A.10.3.1 Up/Down-mix Processing Unit Controls Selectors */
105 #define UAC_UD_ENABLE 0x01
106 #define UAC_UD_MODE_SELECT 0x02
107
108 /* A.10.3.2 Dolby Prologic (tm) Processing Unit Controls Selectors */
109 #define UAC_DP_ENABLE 0x01
110 #define UAC_DP_MODE_SELECT 0x02
111
112 /* A.10.3.3 3D Stereo Extender Processing Unit Control Selectors */
113 #define UAC_3D_ENABLE 0x01
114 #define UAC_3D_SPACE 0x02
115
116 /* A.10.3.4 Reverberation Processing Unit Control Selectors */
117 #define UAC_REVERB_ENABLE 0x01
118 #define UAC_REVERB_LEVEL 0x02
119 #define UAC_REVERB_TIME 0x03
120 #define UAC_REVERB_FEEDBACK 0x04
121
122 /* A.10.3.5 Chorus Processing Unit Control Selectors */
123 #define UAC_CHORUS_ENABLE 0x01
124 #define UAC_CHORUS_LEVEL 0x02
125 #define UAC_CHORUS_RATE 0x03
126 #define UAC_CHORUS_DEPTH 0x04
127
128 /* A.10.3.6 Dynamic Range Compressor Unit Control Selectors */
129 #define UAC_DCR_ENABLE 0x01
130 #define UAC_DCR_RATE 0x02
131 #define UAC_DCR_MAXAMPL 0x03
132 #define UAC_DCR_THRESHOLD 0x04
133 #define UAC_DCR_ATTACK_TIME 0x05
134 #define UAC_DCR_RELEASE_TIME 0x06
135
136 /* A.10.4 Extension Unit Control Selectors */
137 #define UAC_XU_ENABLE 0x01
138
139 /* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */
140 #define UAC_MS_HEADER 0x01
141 #define UAC_MIDI_IN_JACK 0x02
142 #define UAC_MIDI_OUT_JACK 0x03
143
144 /* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */
145 #define UAC_MS_GENERAL 0x01
146
147 /* Terminals - 2.1 USB Terminal Types */
148 #define UAC_TERMINAL_UNDEFINED 0x100
149 #define UAC_TERMINAL_STREAMING 0x101
150 #define UAC_TERMINAL_VENDOR_SPEC 0x1FF
151
152 /* Terminal Control Selectors */
153 /* 4.3.2 Class-Specific AC Interface Descriptor */
154 struct uac1_ac_header_descriptor {
155 __u8 bLength; /* 8 + n */
156 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
157 __u8 bDescriptorSubtype; /* UAC_MS_HEADER */
158 __le16 bcdADC; /* 0x0100 */
159 __le16 wTotalLength; /* includes Unit and Terminal desc. */
160 __u8 bInCollection; /* n */
161 __u8 baInterfaceNr[]; /* [n] */
162 } __attribute__ ((packed));
163
164 #define UAC_DT_AC_HEADER_SIZE(n) (8 + (n))
165
166 /* As above, but more useful for defining your own descriptors: */
167 #define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \
168 struct uac1_ac_header_descriptor_##n { \
169 __u8 bLength; \
170 __u8 bDescriptorType; \
171 __u8 bDescriptorSubtype; \
172 __le16 bcdADC; \
173 __le16 wTotalLength; \
174 __u8 bInCollection; \
175 __u8 baInterfaceNr[n]; \
176 } __attribute__ ((packed))
177
178 /* 4.3.2.1 Input Terminal Descriptor */
179 struct uac_input_terminal_descriptor {
180 __u8 bLength; /* in bytes: 12 */
181 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
182 __u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */
183 __u8 bTerminalID; /* Constant uniquely terminal ID */
184 __le16 wTerminalType; /* USB Audio Terminal Types */
185 __u8 bAssocTerminal; /* ID of the Output Terminal associated */
186 __u8 bNrChannels; /* Number of logical output channels */
187 __le16 wChannelConfig;
188 __u8 iChannelNames;
189 __u8 iTerminal;
190 } __attribute__ ((packed));
191
192 #define UAC_DT_INPUT_TERMINAL_SIZE 12
193
194 /* Terminals - 2.2 Input Terminal Types */
195 #define UAC_INPUT_TERMINAL_UNDEFINED 0x200
196 #define UAC_INPUT_TERMINAL_MICROPHONE 0x201
197 #define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202
198 #define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203
199 #define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204
200 #define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205
201 #define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206
202
203 /* Terminals - control selectors */
204
205 #define UAC_TERMINAL_CS_COPY_PROTECT_CONTROL 0x01
206
207 /* 4.3.2.2 Output Terminal Descriptor */
208 struct uac1_output_terminal_descriptor {
209 __u8 bLength; /* in bytes: 9 */
210 __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
211 __u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */
212 __u8 bTerminalID; /* Constant uniquely terminal ID */
213 __le16 wTerminalType; /* USB Audio Terminal Types */
214 __u8 bAssocTerminal; /* ID of the Input Terminal associated */
215 __u8 bSourceID; /* ID of the connected Unit or Terminal*/
216 __u8 iTerminal;
217 } __attribute__ ((packed));
218
219 #define UAC_DT_OUTPUT_TERMINAL_SIZE 9
220
221 /* Terminals - 2.3 Output Terminal Types */
222 #define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300
223 #define UAC_OUTPUT_TERMINAL_SPEAKER 0x301
224 #define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302
225 #define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303
226 #define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304
227 #define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305
228 #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306
229 #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307
230
231 /* Set bControlSize = 2 as default setting */
232 #define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2)
233
234 /* As above, but more useful for defining your own descriptors: */
235 #define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \
236 struct uac_feature_unit_descriptor_##ch { \
237 __u8 bLength; \
238 __u8 bDescriptorType; \
239 __u8 bDescriptorSubtype; \
240 __u8 bUnitID; \
241 __u8 bSourceID; \
242 __u8 bControlSize; \
243 __le16 bmaControls[ch + 1]; \
244 __u8 iFeature; \
245 } __attribute__ ((packed))
246
247 /* 4.3.2.3 Mixer Unit Descriptor */
248 struct uac_mixer_unit_descriptor {
249 __u8 bLength;
250 __u8 bDescriptorType;
251 __u8 bDescriptorSubtype;
252 __u8 bUnitID;
253 __u8 bNrInPins;
254 __u8 baSourceID[];
255 } __attribute__ ((packed));
256
uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor * desc)257 static inline __u8 uac_mixer_unit_bNrChannels(struct uac_mixer_unit_descriptor *desc)
258 {
259 return desc->baSourceID[desc->bNrInPins];
260 }
261
uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor * desc,int protocol)262 static inline __u32 uac_mixer_unit_wChannelConfig(struct uac_mixer_unit_descriptor *desc,
263 int protocol)
264 {
265 if (protocol == UAC_VERSION_1)
266 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
267 desc->baSourceID[desc->bNrInPins + 1];
268 else
269 return (desc->baSourceID[desc->bNrInPins + 4] << 24) |
270 (desc->baSourceID[desc->bNrInPins + 3] << 16) |
271 (desc->baSourceID[desc->bNrInPins + 2] << 8) |
272 (desc->baSourceID[desc->bNrInPins + 1]);
273 }
274
uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor * desc,int protocol)275 static inline __u8 uac_mixer_unit_iChannelNames(struct uac_mixer_unit_descriptor *desc,
276 int protocol)
277 {
278 return (protocol == UAC_VERSION_1) ?
279 desc->baSourceID[desc->bNrInPins + 3] :
280 desc->baSourceID[desc->bNrInPins + 5];
281 }
282
uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor * desc,int protocol)283 static inline __u8 *uac_mixer_unit_bmControls(struct uac_mixer_unit_descriptor *desc,
284 int protocol)
285 {
286 return (protocol == UAC_VERSION_1) ?
287 &desc->baSourceID[desc->bNrInPins + 4] :
288 &desc->baSourceID[desc->bNrInPins + 6];
289 }
290
uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor * desc)291 static inline __u8 uac_mixer_unit_iMixer(struct uac_mixer_unit_descriptor *desc)
292 {
293 __u8 *raw = (__u8 *) desc;
294 return raw[desc->bLength - 1];
295 }
296
297 /* 4.3.2.4 Selector Unit Descriptor */
298 struct uac_selector_unit_descriptor {
299 __u8 bLength;
300 __u8 bDescriptorType;
301 __u8 bDescriptorSubtype;
302 __u8 bUintID;
303 __u8 bNrInPins;
304 __u8 baSourceID[];
305 } __attribute__ ((packed));
306
uac_selector_unit_iSelector(struct uac_selector_unit_descriptor * desc)307 static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
308 {
309 __u8 *raw = (__u8 *) desc;
310 return raw[desc->bLength - 1];
311 }
312
313 /* 4.3.2.5 Feature Unit Descriptor */
314 struct uac_feature_unit_descriptor {
315 __u8 bLength;
316 __u8 bDescriptorType;
317 __u8 bDescriptorSubtype;
318 __u8 bUnitID;
319 __u8 bSourceID;
320 __u8 bControlSize;
321 __u8 bmaControls[0]; /* variable length */
322 } __attribute__((packed));
323
uac_feature_unit_iFeature(struct uac_feature_unit_descriptor * desc)324 static inline __u8 uac_feature_unit_iFeature(struct uac_feature_unit_descriptor *desc)
325 {
326 __u8 *raw = (__u8 *) desc;
327 return raw[desc->bLength - 1];
328 }
329
330 /* 4.3.2.6 Processing Unit Descriptors */
331 struct uac_processing_unit_descriptor {
332 __u8 bLength;
333 __u8 bDescriptorType;
334 __u8 bDescriptorSubtype;
335 __u8 bUnitID;
336 __u16 wProcessType;
337 __u8 bNrInPins;
338 __u8 baSourceID[];
339 } __attribute__ ((packed));
340
uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor * desc)341 static inline __u8 uac_processing_unit_bNrChannels(struct uac_processing_unit_descriptor *desc)
342 {
343 return desc->baSourceID[desc->bNrInPins];
344 }
345
uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor * desc,int protocol)346 static inline __u32 uac_processing_unit_wChannelConfig(struct uac_processing_unit_descriptor *desc,
347 int protocol)
348 {
349 if (protocol == UAC_VERSION_1)
350 return (desc->baSourceID[desc->bNrInPins + 2] << 8) |
351 desc->baSourceID[desc->bNrInPins + 1];
352 else
353 return (desc->baSourceID[desc->bNrInPins + 4] << 24) |
354 (desc->baSourceID[desc->bNrInPins + 3] << 16) |
355 (desc->baSourceID[desc->bNrInPins + 2] << 8) |
356 (desc->baSourceID[desc->bNrInPins + 1]);
357 }
358
uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor * desc,int protocol)359 static inline __u8 uac_processing_unit_iChannelNames(struct uac_processing_unit_descriptor *desc,
360 int protocol)
361 {
362 return (protocol == UAC_VERSION_1) ?
363 desc->baSourceID[desc->bNrInPins + 3] :
364 desc->baSourceID[desc->bNrInPins + 5];
365 }
366
uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor * desc,int protocol)367 static inline __u8 uac_processing_unit_bControlSize(struct uac_processing_unit_descriptor *desc,
368 int protocol)
369 {
370 return (protocol == UAC_VERSION_1) ?
371 desc->baSourceID[desc->bNrInPins + 4] :
372 desc->baSourceID[desc->bNrInPins + 6];
373 }
374
uac_processing_unit_bmControls(struct uac_processing_unit_descriptor * desc,int protocol)375 static inline __u8 *uac_processing_unit_bmControls(struct uac_processing_unit_descriptor *desc,
376 int protocol)
377 {
378 return (protocol == UAC_VERSION_1) ?
379 &desc->baSourceID[desc->bNrInPins + 5] :
380 &desc->baSourceID[desc->bNrInPins + 7];
381 }
382
uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor * desc,int protocol)383 static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_descriptor *desc,
384 int protocol)
385 {
386 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
387 return *(uac_processing_unit_bmControls(desc, protocol)
388 + control_size);
389 }
390
uac_processing_unit_specific(struct uac_processing_unit_descriptor * desc,int protocol)391 static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
392 int protocol)
393 {
394 __u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
395 return uac_processing_unit_bmControls(desc, protocol)
396 + control_size + 1;
397 }
398
399 /* 4.5.2 Class-Specific AS Interface Descriptor */
400 struct uac1_as_header_descriptor {
401 __u8 bLength; /* in bytes: 7 */
402 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
403 __u8 bDescriptorSubtype; /* AS_GENERAL */
404 __u8 bTerminalLink; /* Terminal ID of connected Terminal */
405 __u8 bDelay; /* Delay introduced by the data path */
406 __le16 wFormatTag; /* The Audio Data Format */
407 } __attribute__ ((packed));
408
409 #define UAC_DT_AS_HEADER_SIZE 7
410
411 /* Formats - A.1.1 Audio Data Format Type I Codes */
412 #define UAC_FORMAT_TYPE_I_UNDEFINED 0x0
413 #define UAC_FORMAT_TYPE_I_PCM 0x1
414 #define UAC_FORMAT_TYPE_I_PCM8 0x2
415 #define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3
416 #define UAC_FORMAT_TYPE_I_ALAW 0x4
417 #define UAC_FORMAT_TYPE_I_MULAW 0x5
418
419 struct uac_format_type_i_continuous_descriptor {
420 __u8 bLength; /* in bytes: 8 + (ns * 3) */
421 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
422 __u8 bDescriptorSubtype; /* FORMAT_TYPE */
423 __u8 bFormatType; /* FORMAT_TYPE_1 */
424 __u8 bNrChannels; /* physical channels in the stream */
425 __u8 bSubframeSize; /* */
426 __u8 bBitResolution;
427 __u8 bSamFreqType;
428 __u8 tLowerSamFreq[3];
429 __u8 tUpperSamFreq[3];
430 } __attribute__ ((packed));
431
432 #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14
433
434 struct uac_format_type_i_discrete_descriptor {
435 __u8 bLength; /* in bytes: 8 + (ns * 3) */
436 __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */
437 __u8 bDescriptorSubtype; /* FORMAT_TYPE */
438 __u8 bFormatType; /* FORMAT_TYPE_1 */
439 __u8 bNrChannels; /* physical channels in the stream */
440 __u8 bSubframeSize; /* */
441 __u8 bBitResolution;
442 __u8 bSamFreqType;
443 __u8 tSamFreq[][3];
444 } __attribute__ ((packed));
445
446 #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \
447 struct uac_format_type_i_discrete_descriptor_##n { \
448 __u8 bLength; \
449 __u8 bDescriptorType; \
450 __u8 bDescriptorSubtype; \
451 __u8 bFormatType; \
452 __u8 bNrChannels; \
453 __u8 bSubframeSize; \
454 __u8 bBitResolution; \
455 __u8 bSamFreqType; \
456 __u8 tSamFreq[n][3]; \
457 } __attribute__ ((packed))
458
459 #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
460
461 struct uac_format_type_i_ext_descriptor {
462 __u8 bLength;
463 __u8 bDescriptorType;
464 __u8 bDescriptorSubtype;
465 __u8 bFormatType;
466 __u8 bSubslotSize;
467 __u8 bBitResolution;
468 __u8 bHeaderLength;
469 __u8 bControlSize;
470 __u8 bSideBandProtocol;
471 } __attribute__((packed));
472
473 /* Formats - Audio Data Format Type I Codes */
474
475 #define UAC_FORMAT_TYPE_II_MPEG 0x1001
476 #define UAC_FORMAT_TYPE_II_AC3 0x1002
477
478 struct uac_format_type_ii_discrete_descriptor {
479 __u8 bLength;
480 __u8 bDescriptorType;
481 __u8 bDescriptorSubtype;
482 __u8 bFormatType;
483 __le16 wMaxBitRate;
484 __le16 wSamplesPerFrame;
485 __u8 bSamFreqType;
486 __u8 tSamFreq[][3];
487 } __attribute__((packed));
488
489 struct uac_format_type_ii_ext_descriptor {
490 __u8 bLength;
491 __u8 bDescriptorType;
492 __u8 bDescriptorSubtype;
493 __u8 bFormatType;
494 __u16 wMaxBitRate;
495 __u16 wSamplesPerFrame;
496 __u8 bHeaderLength;
497 __u8 bSideBandProtocol;
498 } __attribute__((packed));
499
500 /* type III */
501 #define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001
502 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002
503 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003
504 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004
505 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005
506 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006
507
508 /* Formats - A.2 Format Type Codes */
509 #define UAC_FORMAT_TYPE_UNDEFINED 0x0
510 #define UAC_FORMAT_TYPE_I 0x1
511 #define UAC_FORMAT_TYPE_II 0x2
512 #define UAC_FORMAT_TYPE_III 0x3
513 #define UAC_EXT_FORMAT_TYPE_I 0x81
514 #define UAC_EXT_FORMAT_TYPE_II 0x82
515 #define UAC_EXT_FORMAT_TYPE_III 0x83
516
517 struct uac_iso_endpoint_descriptor {
518 __u8 bLength; /* in bytes: 7 */
519 __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */
520 __u8 bDescriptorSubtype; /* EP_GENERAL */
521 __u8 bmAttributes;
522 __u8 bLockDelayUnits;
523 __le16 wLockDelay;
524 } __attribute__((packed));
525 #define UAC_ISO_ENDPOINT_DESC_SIZE 7
526
527 #define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01
528 #define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02
529 #define UAC_EP_CS_ATTR_FILL_MAX 0x80
530
531 /* status word format (3.7.1.1) */
532
533 #define UAC1_STATUS_TYPE_ORIG_MASK 0x0f
534 #define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0
535 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1
536 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2
537
538 #define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7)
539 #define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6)
540
541 struct uac1_status_word {
542 __u8 bStatusType;
543 __u8 bOriginator;
544 } __attribute__((packed));
545
546 #ifdef __KERNEL__
547
548 struct usb_audio_control {
549 struct list_head list;
550 const char *name;
551 u8 type;
552 int data[5];
553 int (*set)(struct usb_audio_control *con, u8 cmd, int value);
554 int (*get)(struct usb_audio_control *con, u8 cmd);
555 };
556
557 struct usb_audio_control_selector {
558 struct list_head list;
559 struct list_head control;
560 u8 id;
561 const char *name;
562 u8 type;
563 struct usb_descriptor_header *desc;
564 };
565
566 #endif /* __KERNEL__ */
567
568 #endif /* __LINUX_USB_AUDIO_H */
569