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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 #define USB_SUBCLASS_VENDOR_SPEC        0xff
  28
  29 /* A.5 Audio Class-Specific AC interface Descriptor Subtypes*/
  30 #define HEADER                          0x01
  31 #define INPUT_TERMINAL                  0x02
  32 #define OUTPUT_TERMINAL                 0x03
  33 #define MIXER_UNIT                      0x04
  34 #define SELECTOR_UNIT                   0x05
  35 #define FEATURE_UNIT                    0x06
  36 #define PROCESSING_UNIT                 0x07
  37 #define EXTENSION_UNIT                  0x08
  38
  39 #define AS_GENERAL                      0x01
  40 #define FORMAT_TYPE                     0x02
  41 #define FORMAT_SPECIFIC                 0x03
  42
  43 #define EP_GENERAL                      0x01
  44
  45 #define MS_GENERAL                      0x01
  46 #define MIDI_IN_JACK                    0x02
  47 #define MIDI_OUT_JACK                   0x03
  48
  49 /* endpoint attributes */
  50 #define EP_ATTR_MASK                    0x0c
  51 #define EP_ATTR_ASYNC                   0x04
  52 #define EP_ATTR_ADAPTIVE                0x08
  53 #define EP_ATTR_SYNC                    0x0c
  54
  55 /* cs endpoint attributes */
  56 #define EP_CS_ATTR_SAMPLE_RATE          0x01
  57 #define EP_CS_ATTR_PITCH_CONTROL        0x02
  58 #define EP_CS_ATTR_FILL_MAX             0x80
  59
  60 /* Audio Class specific Request Codes */
  61 #define USB_AUDIO_SET_INTF              0x21
  62 #define USB_AUDIO_SET_ENDPOINT          0x22
  63 #define USB_AUDIO_GET_INTF              0xa1
  64 #define USB_AUDIO_GET_ENDPOINT          0xa2
  65
  66 #define SET_    0x00
  67 #define GET_    0x80
  68
  69 #define _CUR    0x1
  70 #define _MIN    0x2
  71 #define _MAX    0x3
  72 #define _RES    0x4
  73 #define _MEM    0x5
  74
  75 #define SET_CUR         (SET_ | _CUR)
  76 #define GET_CUR         (GET_ | _CUR)
  77 #define SET_MIN         (SET_ | _MIN)
  78 #define GET_MIN         (GET_ | _MIN)
  79 #define SET_MAX         (SET_ | _MAX)
  80 #define GET_MAX         (GET_ | _MAX)
  81 #define SET_RES         (SET_ | _RES)
  82 #define GET_RES         (GET_ | _RES)
  83 #define SET_MEM         (SET_ | _MEM)
  84 #define GET_MEM         (GET_ | _MEM)
  85
  86 #define GET_STAT        0xff
  87
  88 #define USB_AC_TERMINAL_UNDEFINED       0x100
  89 #define USB_AC_TERMINAL_STREAMING       0x101
  90 #define USB_AC_TERMINAL_VENDOR_SPEC     0x1FF
  91
  92 /* Terminal Control Selectors */
  93 /* 4.3.2  Class-Specific AC Interface Descriptor */
  94 struct usb_ac_header_descriptor {
  95         __u8  bLength;                  /* 8 + n */
  96         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
  97         __u8  bDescriptorSubtype;       /* USB_MS_HEADER */
  98         __le16 bcdADC;                  /* 0x0100 */
  99         __le16 wTotalLength;            /* includes Unit and Terminal desc. */
 100         __u8  bInCollection;            /* n */
 101         __u8  baInterfaceNr[];          /* [n] */
 102 } __attribute__ ((packed));
 103
 104 #define USB_DT_AC_HEADER_SIZE(n)        (8 + (n))
 105
 106 /* As above, but more useful for defining your own descriptors: */
 107 #define DECLARE_USB_AC_HEADER_DESCRIPTOR(n)                     \
 108 struct usb_ac_header_descriptor_##n {                           \
 109         __u8  bLength;                                          \
 110         __u8  bDescriptorType;                                  \
 111         __u8  bDescriptorSubtype;                               \
 112         __le16 bcdADC;                                          \
 113         __le16 wTotalLength;                                    \
 114         __u8  bInCollection;                                    \
 115         __u8  baInterfaceNr[n];                                 \
 116 } __attribute__ ((packed))
 117
 118 /* 4.3.2.1 Input Terminal Descriptor */
 119 struct usb_input_terminal_descriptor {
 120         __u8  bLength;                  /* in bytes: 12 */
 121         __u8  bDescriptorType;          /* CS_INTERFACE descriptor type */
 122         __u8  bDescriptorSubtype;       /* INPUT_TERMINAL descriptor subtype */
 123         __u8  bTerminalID;              /* Constant uniquely terminal ID */
 124         __le16 wTerminalType;           /* USB Audio Terminal Types */
 125         __u8  bAssocTerminal;           /* ID of the Output Terminal associated */
 126         __u8  bNrChannels;              /* Number of logical output channels */
 127         __le16 wChannelConfig;
 128         __u8  iChannelNames;
 129         __u8  iTerminal;
 130 } __attribute__ ((packed));
 131
 132 #define USB_DT_AC_INPUT_TERMINAL_SIZE                   12
 133
 134 #define USB_AC_INPUT_TERMINAL_UNDEFINED                 0x200
 135 #define USB_AC_INPUT_TERMINAL_MICROPHONE                0x201
 136 #define USB_AC_INPUT_TERMINAL_DESKTOP_MICROPHONE        0x202
 137 #define USB_AC_INPUT_TERMINAL_PERSONAL_MICROPHONE       0x203
 138 #define USB_AC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE       0x204
 139 #define USB_AC_INPUT_TERMINAL_MICROPHONE_ARRAY          0x205
 140 #define USB_AC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY     0x206
 141
 142 /* 4.3.2.2 Output Terminal Descriptor */
 143 struct usb_output_terminal_descriptor {
 144         __u8  bLength;                  /* in bytes: 9 */
 145         __u8  bDescriptorType;          /* CS_INTERFACE descriptor type */
 146         __u8  bDescriptorSubtype;       /* OUTPUT_TERMINAL descriptor subtype */
 147         __u8  bTerminalID;              /* Constant uniquely terminal ID */
 148         __le16 wTerminalType;           /* USB Audio Terminal Types */
 149         __u8  bAssocTerminal;           /* ID of the Input Terminal associated */
 150         __u8  bSourceID;                /* ID of the connected Unit or Terminal*/
 151         __u8  iTerminal;
 152 } __attribute__ ((packed));
 153
 154 #define USB_DT_AC_OUTPUT_TERMINAL_SIZE                          9
 155
 156 #define USB_AC_OUTPUT_TERMINAL_UNDEFINED                        0x300
 157 #define USB_AC_OUTPUT_TERMINAL_SPEAKER                          0x301
 158 #define USB_AC_OUTPUT_TERMINAL_HEADPHONES                       0x302
 159 #define USB_AC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO       0x303
 160 #define USB_AC_OUTPUT_TERMINAL_DESKTOP_SPEAKER                  0x304
 161 #define USB_AC_OUTPUT_TERMINAL_ROOM_SPEAKER                     0x305
 162 #define USB_AC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER            0x306
 163 #define USB_AC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER         0x307
 164
 165 /* Set bControlSize = 2 as default setting */
 166 #define USB_DT_AC_FEATURE_UNIT_SIZE(ch)         (7 + ((ch) + 1) * 2)
 167
 168 /* As above, but more useful for defining your own descriptors: */
 169 #define DECLARE_USB_AC_FEATURE_UNIT_DESCRIPTOR(ch)              \
 170 struct usb_ac_feature_unit_descriptor_##ch {                    \
 171         __u8  bLength;                                          \
 172         __u8  bDescriptorType;                                  \
 173         __u8  bDescriptorSubtype;                               \
 174         __u8  bUnitID;                                          \
 175         __u8  bSourceID;                                        \
 176         __u8  bControlSize;                                     \
 177         __le16 bmaControls[ch + 1];                             \
 178         __u8  iFeature;                                         \
 179 } __attribute__ ((packed))
 180
 181 /* 4.5.2 Class-Specific AS Interface Descriptor */
 182 struct usb_as_header_descriptor {
 183         __u8  bLength;                  /* in bytes: 7 */
 184         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 185         __u8  bDescriptorSubtype;       /* AS_GENERAL */
 186         __u8  bTerminalLink;            /* Terminal ID of connected Terminal */
 187         __u8  bDelay;                   /* Delay introduced by the data path */
 188         __le16 wFormatTag;              /* The Audio Data Format */
 189 } __attribute__ ((packed));
 190
 191 #define USB_DT_AS_HEADER_SIZE           7
 192
 193 #define USB_AS_AUDIO_FORMAT_TYPE_I_UNDEFINED    0x0
 194 #define USB_AS_AUDIO_FORMAT_TYPE_I_PCM          0x1
 195 #define USB_AS_AUDIO_FORMAT_TYPE_I_PCM8         0x2
 196 #define USB_AS_AUDIO_FORMAT_TYPE_I_IEEE_FLOAT   0x3
 197 #define USB_AS_AUDIO_FORMAT_TYPE_I_ALAW         0x4
 198 #define USB_AS_AUDIO_FORMAT_TYPE_I_MULAW        0x5
 199
 200 struct usb_as_format_type_i_continuous_descriptor {
 201         __u8  bLength;                  /* in bytes: 8 + (ns * 3) */
 202         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 203         __u8  bDescriptorSubtype;       /* FORMAT_TYPE */
 204         __u8  bFormatType;              /* FORMAT_TYPE_1 */
 205         __u8  bNrChannels;              /* physical channels in the stream */
 206         __u8  bSubframeSize;            /* */
 207         __u8  bBitResolution;
 208         __u8  bSamFreqType;
 209         __u8  tLowerSamFreq[3];
 210         __u8  tUpperSamFreq[3];
 211 } __attribute__ ((packed));
 212
 213 #define USB_AS_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE       14
 214
 215 struct usb_as_formate_type_i_discrete_descriptor {
 216         __u8  bLength;                  /* in bytes: 8 + (ns * 3) */
 217         __u8  bDescriptorType;          /* USB_DT_CS_INTERFACE */
 218         __u8  bDescriptorSubtype;       /* FORMAT_TYPE */
 219         __u8  bFormatType;              /* FORMAT_TYPE_1 */
 220         __u8  bNrChannels;              /* physical channels in the stream */
 221         __u8  bSubframeSize;            /* */
 222         __u8  bBitResolution;
 223         __u8  bSamFreqType;
 224         __u8  tSamFreq[][3];
 225 } __attribute__ ((packed));
 226
 227 #define DECLARE_USB_AS_FORMAT_TYPE_I_DISCRETE_DESC(n)           \
 228 struct usb_as_formate_type_i_discrete_descriptor_##n {          \
 229         __u8  bLength;                                          \
 230         __u8  bDescriptorType;                                  \
 231         __u8  bDescriptorSubtype;                               \
 232         __u8  bFormatType;                                      \
 233         __u8  bNrChannels;                                      \
 234         __u8  bSubframeSize;                                    \
 235         __u8  bBitResolution;                                   \
 236         __u8  bSamFreqType;                                     \
 237         __u8  tSamFreq[n][3];                                   \
 238 } __attribute__ ((packed))
 239
 240 #define USB_AS_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n)      (8 + (n * 3))
 241
 242 #define USB_AS_FORMAT_TYPE_UNDEFINED    0x0
 243 #define USB_AS_FORMAT_TYPE_I            0x1
 244 #define USB_AS_FORMAT_TYPE_II           0x2
 245 #define USB_AS_FORMAT_TYPE_III          0x3
 246
 247 #define USB_AS_ENDPOINT_ASYNC           (1 << 2)
 248 #define USB_AS_ENDPOINT_ADAPTIVE        (2 << 2)
 249 #define USB_AS_ENDPOINT_SYNC            (3 << 2)
 250
 251 struct usb_as_iso_endpoint_descriptor {
 252         __u8  bLength;                  /* in bytes: 7 */
 253         __u8  bDescriptorType;          /* USB_DT_CS_ENDPOINT */
 254         __u8  bDescriptorSubtype;       /* EP_GENERAL */
 255         __u8  bmAttributes;
 256         __u8  bLockDelayUnits;
 257         __le16 wLockDelay;
 258 };
 259 #define USB_AS_ISO_ENDPOINT_DESC_SIZE   7
 260
 261 #define FU_CONTROL_UNDEFINED            0x00
 262 #define MUTE_CONTROL                    0x01
 263 #define VOLUME_CONTROL                  0x02
 264 #define BASS_CONTROL                    0x03
 265 #define MID_CONTROL                     0x04
 266 #define TREBLE_CONTROL                  0x05
 267 #define GRAPHIC_EQUALIZER_CONTROL       0x06
 268 #define AUTOMATIC_GAIN_CONTROL          0x07
 269 #define DELAY_CONTROL                   0x08
 270 #define BASS_BOOST_CONTROL              0x09
 271 #define LOUDNESS_CONTROL                0x0a
 272
 273 #define FU_MUTE         (1 << (MUTE_CONTROL - 1))
 274 #define FU_VOLUME       (1 << (VOLUME_CONTROL - 1))
 275 #define FU_BASS         (1 << (BASS_CONTROL - 1))
 276 #define FU_MID          (1 << (MID_CONTROL - 1))
 277 #define FU_TREBLE       (1 << (TREBLE_CONTROL - 1))
 278 #define FU_GRAPHIC_EQ   (1 << (GRAPHIC_EQUALIZER_CONTROL - 1))
 279 #define FU_AUTO_GAIN    (1 << (AUTOMATIC_GAIN_CONTROL - 1))
 280 #define FU_DELAY        (1 << (DELAY_CONTROL - 1))
 281 #define FU_BASS_BOOST   (1 << (BASS_BOOST_CONTROL - 1))
 282 #define FU_LOUDNESS     (1 << (LOUDNESS_CONTROL - 1))
 283
 284 struct usb_audio_control {
 285         struct list_head list;
 286         const char *name;
 287         u8 type;
 288         int data[5];
 289         int (*set)(struct usb_audio_control *con, u8 cmd, int value);
 290         int (*get)(struct usb_audio_control *con, u8 cmd);
 291 };
 292
 293 static inline int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value)
 294 {
 295         con->data[cmd] = value;
 296
 297         return 0;
 298 }
 299
 300 static inline int generic_get_cmd(struct usb_audio_control *con, u8 cmd)
 301 {
 302         return con->data[cmd];
 303 }
 304
 305 struct usb_audio_control_selector {
 306         struct list_head list;
 307         struct list_head control;
 308         u8 id;
 309         const char *name;
 310         u8 type;
 311         struct usb_descriptor_header *desc;
 312 };
 313
 314 #endif /* __LINUX_USB_AUDIO_H */