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   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
  18 #ifndef __LINUX_USB_AUDIO_H
  19 #define __LINUX_USB_AUDIO_H
  20
  21 #include <linux/types.h>
  22
  23 /* A.2 Audio Interface Subclass Codes */
  24 #define USB_SUBCLASS_AUDIOCONTROL       0x01
  25 #define USB_SUBCLASS_AUDIOSTREAMING     0x02
  26 #define USB_SUBCLASS_MIDISTREAMING      0x03
  27
  28 /* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
  29 #define UAC_HEADER                      0x01
  30 #define UAC_INPUT_TERMINAL              0x02
  31 #define UAC_OUTPUT_TERMINAL             0x03
  32 #define UAC_MIXER_UNIT                  0x04
  33 #define UAC_SELECTOR_UNIT               0x05
  34 #define UAC_FEATURE_UNIT                0x06
  35 #define UAC_PROCESSING_UNIT             0x07
  36 #define UAC_EXTENSION_UNIT              0x08
  37
  38 /* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */
  39 #define UAC_AS_GENERAL                  0x01
  40 #define UAC_FORMAT_TYPE                 0x02
  41 #define UAC_FORMAT_SPECIFIC             0x03
  42
  43 /* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */
  44 #define UAC_EP_GENERAL                  0x01
  45
  46 /* A.9 Audio Class-Specific Request Codes */
  47 #define UAC_SET_                        0x00
  48 #define UAC_GET_                        0x80
  49
  50 #define UAC__CUR                        0x1
  51 #define UAC__MIN                        0x2
  52 #define UAC__MAX                        0x3
  53 #define UAC__RES                        0x4
  54 #define UAC__MEM                        0x5
  55
  56 #define UAC_SET_CUR                     (UAC_SET_ | UAC__CUR)
  57 #define UAC_GET_CUR                     (UAC_GET_ | UAC__CUR)
  58 #define UAC_SET_MIN                     (UAC_SET_ | UAC__MIN)
  59 #define UAC_GET_MIN                     (UAC_GET_ | UAC__MIN)
  60 #define UAC_SET_MAX                     (UAC_SET_ | UAC__MAX)
  61 #define UAC_GET_MAX                     (UAC_GET_ | UAC__MAX)
  62 #define UAC_SET_RES                     (UAC_SET_ | UAC__RES)
  63 #define UAC_GET_RES                     (UAC_GET_ | UAC__RES)
  64 #define UAC_SET_MEM                     (UAC_SET_ | UAC__MEM)
  65 #define UAC_GET_MEM                     (UAC_GET_ | UAC__MEM)
  66
  67 #define UAC_GET_STAT                    0xff
  68
  69 /* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */
  70 #define UAC_MS_HEADER                   0x01
  71 #define UAC_MIDI_IN_JACK                0x02
  72 #define UAC_MIDI_OUT_JACK               0x03
  73
  74 /* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */
  75 #define UAC_MS_GENERAL                  0x01
  76
  77 /* Terminals - 2.1 USB Terminal Types */
  78 #define UAC_TERMINAL_UNDEFINED          0x100
  79 #define UAC_TERMINAL_STREAMING          0x101
  80 #define UAC_TERMINAL_VENDOR_SPEC        0x1FF
  81
  82 /* Terminal Control Selectors */
  83 /* 4.3.2  Class-Specific AC Interface Descriptor */
  84 struct uac_ac_header_descriptor_v1 {
  85         __u8  bLength;                  /* 8 + n */
  86         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
  87         __u8  bDescriptorSubtype;       /* UAC_MS_HEADER */
  88         __le16 bcdADC;                  /* 0x0100 */
  89         __le16 wTotalLength;            /* includes Unit and Terminal desc. */
  90         __u8  bInCollection;            /* n */
  91         __u8  baInterfaceNr[];          /* [n] */
  92 } __attribute__ ((packed));
  93
  94 #define UAC_DT_AC_HEADER_SIZE(n)        (8 + (n))
  95
  96 /* As above, but more useful for defining your own descriptors: */
  97 #define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n)                     \
  98 struct uac_ac_header_descriptor_v1_##n {                        \
  99         __u8  bLength;                                          \
 100         __u8  bDescriptorType;                                  \
 101         __u8  bDescriptorSubtype;                               \
 102         __le16 bcdADC;                                          \
 103         __le16 wTotalLength;                                    \
 104         __u8  bInCollection;                                    \
 105         __u8  baInterfaceNr[n];                                 \
 106 } __attribute__ ((packed))
 107
 108 /* 4.3.2.1 Input Terminal Descriptor */
 109 struct uac_input_terminal_descriptor {
 110         __u8  bLength;                  /* in bytes: 12 */
 111         __u8  bDescriptorType;          /* CS_INTERFACE descriptor type */
 112         __u8  bDescriptorSubtype;       /* INPUT_TERMINAL descriptor subtype */
 113         __u8  bTerminalID;              /* Constant uniquely terminal ID */
 114         __le16 wTerminalType;           /* USB Audio Terminal Types */
 115         __u8  bAssocTerminal;           /* ID of the Output Terminal associated */
 116         __u8  bNrChannels;              /* Number of logical output channels */
 117         __le16 wChannelConfig;
 118         __u8  iChannelNames;
 119         __u8  iTerminal;
 120 } __attribute__ ((packed));
 121
 122 #define UAC_DT_INPUT_TERMINAL_SIZE                      12
 123
 124 /* Terminals - 2.2 Input Terminal Types */
 125 #define UAC_INPUT_TERMINAL_UNDEFINED                    0x200
 126 #define UAC_INPUT_TERMINAL_MICROPHONE                   0x201
 127 #define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE           0x202
 128 #define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE          0x203
 129 #define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE          0x204
 130 #define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY             0x205
 131 #define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY        0x206
 132
 133 /* 4.3.2.2 Output Terminal Descriptor */
 134 struct uac_output_terminal_descriptor_v1 {
 135         __u8  bLength;                  /* in bytes: 9 */
 136         __u8  bDescriptorType;          /* CS_INTERFACE descriptor type */
 137         __u8  bDescriptorSubtype;       /* OUTPUT_TERMINAL descriptor subtype */
 138         __u8  bTerminalID;              /* Constant uniquely terminal ID */
 139         __le16 wTerminalType;           /* USB Audio Terminal Types */
 140         __u8  bAssocTerminal;           /* ID of the Input Terminal associated */
 141         __u8  bSourceID;                /* ID of the connected Unit or Terminal*/
 142         __u8  iTerminal;
 143 } __attribute__ ((packed));
 144
 145 #define UAC_DT_OUTPUT_TERMINAL_SIZE                     9
 146
 147 /* Terminals - 2.3 Output Terminal Types */
 148 #define UAC_OUTPUT_TERMINAL_UNDEFINED                   0x300
 149 #define UAC_OUTPUT_TERMINAL_SPEAKER                     0x301
 150 #define UAC_OUTPUT_TERMINAL_HEADPHONES                  0x302
 151 #define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO  0x303
 152 #define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER             0x304
 153 #define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER                0x305
 154 #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER       0x306
 155 #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER    0x307
 156
 157 /* Set bControlSize = 2 as default setting */
 158 #define UAC_DT_FEATURE_UNIT_SIZE(ch)            (7 + ((ch) + 1) * 2)
 159
 160 /* As above, but more useful for defining your own descriptors: */
 161 #define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch)                 \
 162 struct uac_feature_unit_descriptor_##ch {                       \
 163         __u8  bLength;                                          \
 164         __u8  bDescriptorType;                                  \
 165         __u8  bDescriptorSubtype;                               \
 166         __u8  bUnitID;                                          \
 167         __u8  bSourceID;                                        \
 168         __u8  bControlSize;                                     \
 169         __le16 bmaControls[ch + 1];                             \
 170         __u8  iFeature;                                         \
 171 } __attribute__ ((packed))
 172
 173 /* 4.5.2 Class-Specific AS Interface Descriptor */
 174 struct uac_as_header_descriptor_v1 {
 175         __u8  bLength;                  /* in bytes: 7 */
 176         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 177         __u8  bDescriptorSubtype;       /* AS_GENERAL */
 178         __u8  bTerminalLink;            /* Terminal ID of connected Terminal */
 179         __u8  bDelay;                   /* Delay introduced by the data path */
 180         __le16 wFormatTag;              /* The Audio Data Format */
 181 } __attribute__ ((packed));
 182
 183 #define UAC_DT_AS_HEADER_SIZE           7
 184
 185 /* Formats - A.1.1 Audio Data Format Type I Codes */
 186 #define UAC_FORMAT_TYPE_I_UNDEFINED     0x0
 187 #define UAC_FORMAT_TYPE_I_PCM           0x1
 188 #define UAC_FORMAT_TYPE_I_PCM8          0x2
 189 #define UAC_FORMAT_TYPE_I_IEEE_FLOAT    0x3
 190 #define UAC_FORMAT_TYPE_I_ALAW          0x4
 191 #define UAC_FORMAT_TYPE_I_MULAW         0x5
 192
 193 struct uac_format_type_i_continuous_descriptor {
 194         __u8  bLength;                  /* in bytes: 8 + (ns * 3) */
 195         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 196         __u8  bDescriptorSubtype;       /* FORMAT_TYPE */
 197         __u8  bFormatType;              /* FORMAT_TYPE_1 */
 198         __u8  bNrChannels;              /* physical channels in the stream */
 199         __u8  bSubframeSize;            /* */
 200         __u8  bBitResolution;
 201         __u8  bSamFreqType;
 202         __u8  tLowerSamFreq[3];
 203         __u8  tUpperSamFreq[3];
 204 } __attribute__ ((packed));
 205
 206 #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE  14
 207
 208 struct uac_format_type_i_discrete_descriptor {
 209         __u8  bLength;                  /* in bytes: 8 + (ns * 3) */
 210         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 211         __u8  bDescriptorSubtype;       /* FORMAT_TYPE */
 212         __u8  bFormatType;              /* FORMAT_TYPE_1 */
 213         __u8  bNrChannels;              /* physical channels in the stream */
 214         __u8  bSubframeSize;            /* */
 215         __u8  bBitResolution;
 216         __u8  bSamFreqType;
 217         __u8  tSamFreq[][3];
 218 } __attribute__ ((packed));
 219
 220 #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n)              \
 221 struct uac_format_type_i_discrete_descriptor_##n {              \
 222         __u8  bLength;                                          \
 223         __u8  bDescriptorType;                                  \
 224         __u8  bDescriptorSubtype;                               \
 225         __u8  bFormatType;                                      \
 226         __u8  bNrChannels;                                      \
 227         __u8  bSubframeSize;                                    \
 228         __u8  bBitResolution;                                   \
 229         __u8  bSamFreqType;                                     \
 230         __u8  tSamFreq[n][3];                                   \
 231 } __attribute__ ((packed))
 232
 233 #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
 234
 235 /* Formats - Audio Data Format Type I Codes */
 236
 237 struct uac_format_type_ii_discrete_descriptor {
 238         __u8 bLength;
 239         __u8 bDescriptorType;
 240         __u8 bDescriptorSubtype;
 241         __u8 bFormatType;
 242         __le16 wMaxBitRate;
 243         __le16 wSamplesPerFrame;
 244         __u8 bSamFreqType;
 245         __u8 tSamFreq[][3];
 246 } __attribute__((packed));
 247
 248 /* Formats - A.2 Format Type Codes */
 249 #define UAC_FORMAT_TYPE_UNDEFINED       0x0
 250 #define UAC_FORMAT_TYPE_I               0x1
 251 #define UAC_FORMAT_TYPE_II              0x2
 252 #define UAC_FORMAT_TYPE_III             0x3
 253
 254 struct uac_iso_endpoint_descriptor {
 255         __u8  bLength;                  /* in bytes: 7 */
 256         __u8  bDescriptorType;          /* USB_DT_CS_ENDPOINT */
 257         __u8  bDescriptorSubtype;       /* EP_GENERAL */
 258         __u8  bmAttributes;
 259         __u8  bLockDelayUnits;
 260         __le16 wLockDelay;
 261 };
 262 #define UAC_ISO_ENDPOINT_DESC_SIZE      7
 263
 264 #define UAC_EP_CS_ATTR_SAMPLE_RATE      0x01
 265 #define UAC_EP_CS_ATTR_PITCH_CONTROL    0x02
 266 #define UAC_EP_CS_ATTR_FILL_MAX         0x80
 267
 268 /* A.10.2 Feature Unit Control Selectors */
 269
 270 struct uac_feature_unit_descriptor {
 271         __u8 bLength;
 272         __u8 bDescriptorType;
 273         __u8 bDescriptorSubtype;
 274         __u8 bUnitID;
 275         __u8 bSourceID;
 276         __u8 bControlSize;
 277         __u8 controls[0]; /* variable length */
 278 } __attribute__((packed));
 279
 280 #define UAC_FU_CONTROL_UNDEFINED        0x00
 281 #define UAC_MUTE_CONTROL                0x01
 282 #define UAC_VOLUME_CONTROL              0x02
 283 #define UAC_BASS_CONTROL                0x03
 284 #define UAC_MID_CONTROL                 0x04
 285 #define UAC_TREBLE_CONTROL              0x05
 286 #define UAC_GRAPHIC_EQUALIZER_CONTROL   0x06
 287 #define UAC_AUTOMATIC_GAIN_CONTROL      0x07
 288 #define UAC_DELAY_CONTROL               0x08
 289 #define UAC_BASS_BOOST_CONTROL          0x09
 290 #define UAC_LOUDNESS_CONTROL            0x0a
 291
 292 #define UAC_FU_MUTE             (1 << (UAC_MUTE_CONTROL - 1))
 293 #define UAC_FU_VOLUME           (1 << (UAC_VOLUME_CONTROL - 1))
 294 #define UAC_FU_BASS             (1 << (UAC_BASS_CONTROL - 1))
 295 #define UAC_FU_MID              (1 << (UAC_MID_CONTROL - 1))
 296 #define UAC_FU_TREBLE           (1 << (UAC_TREBLE_CONTROL - 1))
 297 #define UAC_FU_GRAPHIC_EQ       (1 << (UAC_GRAPHIC_EQUALIZER_CONTROL - 1))
 298 #define UAC_FU_AUTO_GAIN        (1 << (UAC_AUTOMATIC_GAIN_CONTROL - 1))
 299 #define UAC_FU_DELAY            (1 << (UAC_DELAY_CONTROL - 1))
 300 #define UAC_FU_BASS_BOOST       (1 << (UAC_BASS_BOOST_CONTROL - 1))
 301 #define UAC_FU_LOUDNESS         (1 << (UAC_LOUDNESS_CONTROL - 1))
 302
 303 #ifdef __KERNEL__
 304
 305 struct usb_audio_control {
 306         struct list_head list;
 307         const char *name;
 308         u8 type;
 309         int data[5];
 310         int (*set)(struct usb_audio_control *con, u8 cmd, int value);
 311         int (*get)(struct usb_audio_control *con, u8 cmd);
 312 };
 313
 314 struct usb_audio_control_selector {
 315         struct list_head list;
 316         struct list_head control;
 317         u8 id;
 318         const char *name;
 319         u8 type;
 320         struct usb_descriptor_header *desc;
 321 };
 322
 323 #endif /* __KERNEL__ */
 324
 325 #endif /* __LINUX_USB_AUDIO_H */