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Linux/include/linux/usb/audio-v2.h

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  1 /*
  2  * Copyright (c) 2010 Daniel Mack <daniel@caiaq.de>
  3  *
  4  * This software is distributed under the terms of the GNU General Public
  5  * License ("GPL") version 2, as published by the Free Software Foundation.
  6  *
  7  * This file holds USB constants and structures defined
  8  * by the USB Device Class Definition for Audio Devices in version 2.0.
  9  * Comments below reference relevant sections of the documents contained
 10  * in http://www.usb.org/developers/devclass_docs/Audio2.0_final.zip
 11  */
 12 
 13 #ifndef __LINUX_USB_AUDIO_V2_H
 14 #define __LINUX_USB_AUDIO_V2_H
 15 
 16 #include <linux/types.h>
 17 
 18 /* v1.0 and v2.0 of this standard have many things in common. For the rest
 19  * of the definitions, please refer to audio.h */
 20 
 21 /*
 22  * bmControl field decoders
 23  *
 24  * From the USB Audio spec v2.0:
 25  *
 26  *   bmaControls() is a (ch+1)-element array of 4-byte bitmaps,
 27  *   each containing a set of bit pairs. If a Control is present,
 28  *   it must be Host readable. If a certain Control is not
 29  *   present then the bit pair must be set to 0b00.
 30  *   If a Control is present but read-only, the bit pair must be
 31  *   set to 0b01. If a Control is also Host programmable, the bit
 32  *   pair must be set to 0b11. The value 0b10 is not allowed.
 33  *
 34  */
 35 
 36 static inline bool uac2_control_is_readable(u32 bmControls, u8 control)
 37 {
 38         return (bmControls >> (control * 2)) & 0x1;
 39 }
 40 
 41 static inline bool uac2_control_is_writeable(u32 bmControls, u8 control)
 42 {
 43         return (bmControls >> (control * 2)) & 0x2;
 44 }
 45 
 46 /* 4.7.2 Class-Specific AC Interface Descriptor */
 47 struct uac2_ac_header_descriptor {
 48         __u8  bLength;                  /* 9 */
 49         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 50         __u8  bDescriptorSubtype;       /* UAC_MS_HEADER */
 51         __le16 bcdADC;                  /* 0x0200 */
 52         __u8  bCategory;
 53         __le16 wTotalLength;            /* includes Unit and Terminal desc. */
 54         __u8  bmControls;
 55 } __packed;
 56 
 57 /* 2.3.1.6 Type I Format Type Descriptor (Frmts20 final.pdf)*/
 58 struct uac2_format_type_i_descriptor {
 59         __u8  bLength;                  /* in bytes: 6 */
 60         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 61         __u8  bDescriptorSubtype;       /* FORMAT_TYPE */
 62         __u8  bFormatType;              /* FORMAT_TYPE_1 */
 63         __u8  bSubslotSize;             /* {1,2,3,4} */
 64         __u8  bBitResolution;
 65 } __packed;
 66 
 67 /* 4.7.2.1 Clock Source Descriptor */
 68 
 69 struct uac_clock_source_descriptor {
 70         __u8 bLength;
 71         __u8 bDescriptorType;
 72         __u8 bDescriptorSubtype;
 73         __u8 bClockID;
 74         __u8 bmAttributes;
 75         __u8 bmControls;
 76         __u8 bAssocTerminal;
 77         __u8 iClockSource;
 78 } __attribute__((packed));
 79 
 80 /* bmAttribute fields */
 81 #define UAC_CLOCK_SOURCE_TYPE_EXT       0x0
 82 #define UAC_CLOCK_SOURCE_TYPE_INT_FIXED 0x1
 83 #define UAC_CLOCK_SOURCE_TYPE_INT_VAR   0x2
 84 #define UAC_CLOCK_SOURCE_TYPE_INT_PROG  0x3
 85 #define UAC_CLOCK_SOURCE_SYNCED_TO_SOF  (1 << 2)
 86 
 87 /* 4.7.2.2 Clock Source Descriptor */
 88 
 89 struct uac_clock_selector_descriptor {
 90         __u8 bLength;
 91         __u8 bDescriptorType;
 92         __u8 bDescriptorSubtype;
 93         __u8 bClockID;
 94         __u8 bNrInPins;
 95         __u8 baCSourceID[];
 96         /* bmControls, bAssocTerminal and iClockSource omitted */
 97 } __attribute__((packed));
 98 
 99 /* 4.7.2.3 Clock Multiplier Descriptor */
100 
101 struct uac_clock_multiplier_descriptor {
102         __u8 bLength;
103         __u8 bDescriptorType;
104         __u8 bDescriptorSubtype;
105         __u8 bClockID;
106         __u8 bCSourceID;
107         __u8 bmControls;
108         __u8 iClockMultiplier;
109 } __attribute__((packed));
110 
111 /* 4.7.2.4 Input terminal descriptor */
112 
113 struct uac2_input_terminal_descriptor {
114         __u8 bLength;
115         __u8 bDescriptorType;
116         __u8 bDescriptorSubtype;
117         __u8 bTerminalID;
118         __u16 wTerminalType;
119         __u8 bAssocTerminal;
120         __u8 bCSourceID;
121         __u8 bNrChannels;
122         __u32 bmChannelConfig;
123         __u8 iChannelNames;
124         __u16 bmControls;
125         __u8 iTerminal;
126 } __attribute__((packed));
127 
128 /* 4.7.2.5 Output terminal descriptor */
129 
130 struct uac2_output_terminal_descriptor {
131         __u8 bLength;
132         __u8 bDescriptorType;
133         __u8 bDescriptorSubtype;
134         __u8 bTerminalID;
135         __u16 wTerminalType;
136         __u8 bAssocTerminal;
137         __u8 bSourceID;
138         __u8 bCSourceID;
139         __u16 bmControls;
140         __u8 iTerminal;
141 } __attribute__((packed));
142 
143 
144 
145 /* 4.7.2.8 Feature Unit Descriptor */
146 
147 struct uac2_feature_unit_descriptor {
148         __u8 bLength;
149         __u8 bDescriptorType;
150         __u8 bDescriptorSubtype;
151         __u8 bUnitID;
152         __u8 bSourceID;
153         /* bmaControls is actually u32,
154          * but u8 is needed for the hybrid parser */
155         __u8 bmaControls[0]; /* variable length */
156 } __attribute__((packed));
157 
158 /* 4.9.2 Class-Specific AS Interface Descriptor */
159 
160 struct uac2_as_header_descriptor {
161         __u8 bLength;
162         __u8 bDescriptorType;
163         __u8 bDescriptorSubtype;
164         __u8 bTerminalLink;
165         __u8 bmControls;
166         __u8 bFormatType;
167         __u32 bmFormats;
168         __u8 bNrChannels;
169         __u32 bmChannelConfig;
170         __u8 iChannelNames;
171 } __attribute__((packed));
172 
173 #define UAC2_FORMAT_TYPE_I_RAW_DATA     (1 << 31)
174 
175 /* 4.10.1.2 Class-Specific AS Isochronous Audio Data Endpoint Descriptor */
176 
177 struct uac2_iso_endpoint_descriptor {
178         __u8  bLength;                  /* in bytes: 8 */
179         __u8  bDescriptorType;          /* USB_DT_CS_ENDPOINT */
180         __u8  bDescriptorSubtype;       /* EP_GENERAL */
181         __u8  bmAttributes;
182         __u8  bmControls;
183         __u8  bLockDelayUnits;
184         __le16 wLockDelay;
185 } __attribute__((packed));
186 
187 #define UAC2_CONTROL_PITCH              (3 << 0)
188 #define UAC2_CONTROL_DATA_OVERRUN       (3 << 2)
189 #define UAC2_CONTROL_DATA_UNDERRUN      (3 << 4)
190 
191 /* 6.1 Interrupt Data Message */
192 
193 #define UAC2_INTERRUPT_DATA_MSG_VENDOR  (1 << 0)
194 #define UAC2_INTERRUPT_DATA_MSG_EP      (1 << 1)
195 
196 struct uac2_interrupt_data_msg {
197         __u8 bInfo;
198         __u8 bAttribute;
199         __le16 wValue;
200         __le16 wIndex;
201 } __attribute__((packed));
202 
203 /* A.7 Audio Function Category Codes */
204 #define UAC2_FUNCTION_SUBCLASS_UNDEFINED        0x00
205 #define UAC2_FUNCTION_DESKTOP_SPEAKER           0x01
206 #define UAC2_FUNCTION_HOME_THEATER              0x02
207 #define UAC2_FUNCTION_MICROPHONE                0x03
208 #define UAC2_FUNCTION_HEADSET                   0x04
209 #define UAC2_FUNCTION_TELEPHONE                 0x05
210 #define UAC2_FUNCTION_CONVERTER                 0x06
211 #define UAC2_FUNCTION_SOUND_RECORDER            0x07
212 #define UAC2_FUNCTION_IO_BOX                    0x08
213 #define UAC2_FUNCTION_MUSICAL_INSTRUMENT        0x09
214 #define UAC2_FUNCTION_PRO_AUDIO                 0x0a
215 #define UAC2_FUNCTION_AUDIO_VIDEO               0x0b
216 #define UAC2_FUNCTION_CONTROL_PANEL             0x0c
217 #define UAC2_FUNCTION_OTHER                     0xff
218 
219 /* A.9 Audio Class-Specific AC Interface Descriptor Subtypes */
220 /* see audio.h for the rest, which is identical to v1 */
221 #define UAC2_EFFECT_UNIT                        0x07
222 #define UAC2_PROCESSING_UNIT_V2         0x08
223 #define UAC2_EXTENSION_UNIT_V2          0x09
224 #define UAC2_CLOCK_SOURCE               0x0a
225 #define UAC2_CLOCK_SELECTOR             0x0b
226 #define UAC2_CLOCK_MULTIPLIER           0x0c
227 #define UAC2_SAMPLE_RATE_CONVERTER      0x0d
228 
229 /* A.10 Audio Class-Specific AS Interface Descriptor Subtypes */
230 /* see audio.h for the rest, which is identical to v1 */
231 #define UAC2_ENCODER                    0x03
232 #define UAC2_DECODER                    0x04
233 
234 /* A.11 Effect Unit Effect Types */
235 #define UAC2_EFFECT_UNDEFINED           0x00
236 #define UAC2_EFFECT_PARAM_EQ            0x01
237 #define UAC2_EFFECT_REVERB              0x02
238 #define UAC2_EFFECT_MOD_DELAY           0x03
239 #define UAC2_EFFECT_DYN_RANGE_COMP      0x04
240 
241 /* A.12 Processing Unit Process Types */
242 #define UAC2_PROCESS_UNDEFINED          0x00
243 #define UAC2_PROCESS_UP_DOWNMIX         0x01
244 #define UAC2_PROCESS_DOLBY_PROLOCIC     0x02
245 #define UAC2_PROCESS_STEREO_EXTENDER    0x03
246 
247 /* A.14 Audio Class-Specific Request Codes */
248 #define UAC2_CS_CUR                     0x01
249 #define UAC2_CS_RANGE                   0x02
250 #define UAC2_CS_MEM                     0x03
251 
252 /* A.15 Encoder Type Codes */
253 #define UAC2_ENCODER_UNDEFINED          0x00
254 #define UAC2_ENCODER_OTHER              0x01
255 #define UAC2_ENCODER_MPEG               0x02
256 #define UAC2_ENCODER_AC3                0x03
257 #define UAC2_ENCODER_WMA                0x04
258 #define UAC2_ENCODER_DTS                0x05
259 
260 /* A.16 Decoder Type Codes */
261 #define UAC2_DECODER_UNDEFINED          0x00
262 #define UAC2_DECODER_OTHER              0x01
263 #define UAC2_DECODER_MPEG               0x02
264 #define UAC2_DECODER_AC3                0x03
265 #define UAC2_DECODER_WMA                0x04
266 #define UAC2_DECODER_DTS                0x05
267 
268 /* A.17.1 Clock Source Control Selectors */
269 #define UAC2_CS_UNDEFINED               0x00
270 #define UAC2_CS_CONTROL_SAM_FREQ        0x01
271 #define UAC2_CS_CONTROL_CLOCK_VALID     0x02
272 
273 /* A.17.2 Clock Selector Control Selectors */
274 #define UAC2_CX_UNDEFINED               0x00
275 #define UAC2_CX_CLOCK_SELECTOR          0x01
276 
277 /* A.17.3 Clock Multiplier Control Selectors */
278 #define UAC2_CM_UNDEFINED               0x00
279 #define UAC2_CM_NUMERATOR               0x01
280 #define UAC2_CM_DENOMINTATOR            0x02
281 
282 /* A.17.4 Terminal Control Selectors */
283 #define UAC2_TE_UNDEFINED               0x00
284 #define UAC2_TE_COPY_PROTECT            0x01
285 #define UAC2_TE_CONNECTOR               0x02
286 #define UAC2_TE_OVERLOAD                0x03
287 #define UAC2_TE_CLUSTER                 0x04
288 #define UAC2_TE_UNDERFLOW               0x05
289 #define UAC2_TE_OVERFLOW                0x06
290 #define UAC2_TE_LATENCY                 0x07
291 
292 /* A.17.5 Mixer Control Selectors */
293 #define UAC2_MU_UNDEFINED               0x00
294 #define UAC2_MU_MIXER                   0x01
295 #define UAC2_MU_CLUSTER                 0x02
296 #define UAC2_MU_UNDERFLOW               0x03
297 #define UAC2_MU_OVERFLOW                0x04
298 #define UAC2_MU_LATENCY                 0x05
299 
300 /* A.17.6 Selector Control Selectors */
301 #define UAC2_SU_UNDEFINED               0x00
302 #define UAC2_SU_SELECTOR                0x01
303 #define UAC2_SU_LATENCY                 0x02
304 
305 /* A.17.7 Feature Unit Control Selectors */
306 /* see audio.h for the rest, which is identical to v1 */
307 #define UAC2_FU_INPUT_GAIN              0x0b
308 #define UAC2_FU_INPUT_GAIN_PAD          0x0c
309 #define UAC2_FU_PHASE_INVERTER          0x0d
310 #define UAC2_FU_UNDERFLOW               0x0e
311 #define UAC2_FU_OVERFLOW                0x0f
312 #define UAC2_FU_LATENCY                 0x10
313 
314 /* A.17.8.1 Parametric Equalizer Section Effect Unit Control Selectors */
315 #define UAC2_PE_UNDEFINED               0x00
316 #define UAC2_PE_ENABLE                  0x01
317 #define UAC2_PE_CENTERFREQ              0x02
318 #define UAC2_PE_QFACTOR                 0x03
319 #define UAC2_PE_GAIN                    0x04
320 #define UAC2_PE_UNDERFLOW               0x05
321 #define UAC2_PE_OVERFLOW                0x06
322 #define UAC2_PE_LATENCY                 0x07
323 
324 /* A.17.8.2 Reverberation Effect Unit Control Selectors */
325 #define UAC2_RV_UNDEFINED               0x00
326 #define UAC2_RV_ENABLE                  0x01
327 #define UAC2_RV_TYPE                    0x02
328 #define UAC2_RV_LEVEL                   0x03
329 #define UAC2_RV_TIME                    0x04
330 #define UAC2_RV_FEEDBACK                0x05
331 #define UAC2_RV_PREDELAY                0x06
332 #define UAC2_RV_DENSITY                 0x07
333 #define UAC2_RV_HIFREQ_ROLLOFF          0x08
334 #define UAC2_RV_UNDERFLOW               0x09
335 #define UAC2_RV_OVERFLOW                0x0a
336 #define UAC2_RV_LATENCY                 0x0b
337 
338 /* A.17.8.3 Modulation Delay Effect Control Selectors */
339 #define UAC2_MD_UNDEFINED               0x00
340 #define UAC2_MD_ENABLE                  0x01
341 #define UAC2_MD_BALANCE                 0x02
342 #define UAC2_MD_RATE                    0x03
343 #define UAC2_MD_DEPTH                   0x04
344 #define UAC2_MD_TIME                    0x05
345 #define UAC2_MD_FEEDBACK                0x06
346 #define UAC2_MD_UNDERFLOW               0x07
347 #define UAC2_MD_OVERFLOW                0x08
348 #define UAC2_MD_LATENCY                 0x09
349 
350 /* A.17.8.4 Dynamic Range Compressor Effect Unit Control Selectors */
351 #define UAC2_DR_UNDEFINED               0x00
352 #define UAC2_DR_ENABLE                  0x01
353 #define UAC2_DR_COMPRESSION_RATE        0x02
354 #define UAC2_DR_MAXAMPL                 0x03
355 #define UAC2_DR_THRESHOLD               0x04
356 #define UAC2_DR_ATTACK_TIME             0x05
357 #define UAC2_DR_RELEASE_TIME            0x06
358 #define UAC2_DR_UNDEFLOW                0x07
359 #define UAC2_DR_OVERFLOW                0x08
360 #define UAC2_DR_LATENCY                 0x09
361 
362 /* A.17.9.1 Up/Down-mix Processing Unit Control Selectors */
363 #define UAC2_UD_UNDEFINED               0x00
364 #define UAC2_UD_ENABLE                  0x01
365 #define UAC2_UD_MODE_SELECT             0x02
366 #define UAC2_UD_CLUSTER                 0x03
367 #define UAC2_UD_UNDERFLOW               0x04
368 #define UAC2_UD_OVERFLOW                0x05
369 #define UAC2_UD_LATENCY                 0x06
370 
371 /* A.17.9.2 Dolby Prologic[tm] Processing Unit Control Selectors */
372 #define UAC2_DP_UNDEFINED               0x00
373 #define UAC2_DP_ENABLE                  0x01
374 #define UAC2_DP_MODE_SELECT             0x02
375 #define UAC2_DP_CLUSTER                 0x03
376 #define UAC2_DP_UNDERFFLOW              0x04
377 #define UAC2_DP_OVERFLOW                0x05
378 #define UAC2_DP_LATENCY                 0x06
379 
380 /* A.17.9.3 Stereo Expander Processing Unit Control Selectors */
381 #define UAC2_ST_EXT_UNDEFINED           0x00
382 #define UAC2_ST_EXT_ENABLE              0x01
383 #define UAC2_ST_EXT_WIDTH               0x02
384 #define UAC2_ST_EXT_UNDEFLOW            0x03
385 #define UAC2_ST_EXT_OVERFLOW            0x04
386 #define UAC2_ST_EXT_LATENCY             0x05
387 
388 /* A.17.10 Extension Unit Control Selectors */
389 #define UAC2_XU_UNDEFINED               0x00
390 #define UAC2_XU_ENABLE                  0x01
391 #define UAC2_XU_CLUSTER                 0x02
392 #define UAC2_XU_UNDERFLOW               0x03
393 #define UAC2_XU_OVERFLOW                0x04
394 #define UAC2_XU_LATENCY                 0x05
395 
396 /* A.17.11 AudioStreaming Interface Control Selectors */
397 #define UAC2_AS_UNDEFINED               0x00
398 #define UAC2_AS_ACT_ALT_SETTING         0x01
399 #define UAC2_AS_VAL_ALT_SETTINGS        0x02
400 #define UAC2_AS_AUDIO_DATA_FORMAT       0x03
401 
402 /* A.17.12 Encoder Control Selectors */
403 #define UAC2_EN_UNDEFINED               0x00
404 #define UAC2_EN_BIT_RATE                0x01
405 #define UAC2_EN_QUALITY                 0x02
406 #define UAC2_EN_VBR                     0x03
407 #define UAC2_EN_TYPE                    0x04
408 #define UAC2_EN_UNDERFLOW               0x05
409 #define UAC2_EN_OVERFLOW                0x06
410 #define UAC2_EN_ENCODER_ERROR           0x07
411 #define UAC2_EN_PARAM1                  0x08
412 #define UAC2_EN_PARAM2                  0x09
413 #define UAC2_EN_PARAM3                  0x0a
414 #define UAC2_EN_PARAM4                  0x0b
415 #define UAC2_EN_PARAM5                  0x0c
416 #define UAC2_EN_PARAM6                  0x0d
417 #define UAC2_EN_PARAM7                  0x0e
418 #define UAC2_EN_PARAM8                  0x0f
419 
420 /* A.17.13.1 MPEG Decoder Control Selectors */
421 #define UAC2_MPEG_UNDEFINED             0x00
422 #define UAC2_MPEG_DUAL_CHANNEL          0x01
423 #define UAC2_MPEG_SECOND_STEREO         0x02
424 #define UAC2_MPEG_MULTILINGUAL          0x03
425 #define UAC2_MPEG_DYN_RANGE             0x04
426 #define UAC2_MPEG_SCALING               0x05
427 #define UAC2_MPEG_HILO_SCALING          0x06
428 #define UAC2_MPEG_UNDERFLOW             0x07
429 #define UAC2_MPEG_OVERFLOW              0x08
430 #define UAC2_MPEG_DECODER_ERROR         0x09
431 
432 /* A17.13.2 AC3 Decoder Control Selectors */
433 #define UAC2_AC3_UNDEFINED              0x00
434 #define UAC2_AC3_MODE                   0x01
435 #define UAC2_AC3_DYN_RANGE              0x02
436 #define UAC2_AC3_SCALING                0x03
437 #define UAC2_AC3_HILO_SCALING           0x04
438 #define UAC2_AC3_UNDERFLOW              0x05
439 #define UAC2_AC3_OVERFLOW               0x06
440 #define UAC2_AC3_DECODER_ERROR          0x07
441 
442 /* A17.13.3 WMA Decoder Control Selectors */
443 #define UAC2_WMA_UNDEFINED              0x00
444 #define UAC2_WMA_UNDERFLOW              0x01
445 #define UAC2_WMA_OVERFLOW               0x02
446 #define UAC2_WMA_DECODER_ERROR          0x03
447 
448 /* A17.13.4 DTS Decoder Control Selectors */
449 #define UAC2_DTS_UNDEFINED              0x00
450 #define UAC2_DTS_UNDERFLOW              0x01
451 #define UAC2_DTS_OVERFLOW               0x02
452 #define UAC2_DTS_DECODER_ERROR          0x03
453 
454 /* A17.14 Endpoint Control Selectors */
455 #define UAC2_EP_CS_UNDEFINED            0x00
456 #define UAC2_EP_CS_PITCH                0x01
457 #define UAC2_EP_CS_DATA_OVERRUN         0x02
458 #define UAC2_EP_CS_DATA_UNDERRUN        0x03
459 
460 #endif /* __LINUX_USB_AUDIO_V2_H */
461 
462 

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