| /* |
| * <linux/usb/audio.h> -- USB Audio definitions. |
| * |
| * Copyright (C) 2006 Thumtronics Pty Ltd. |
| * Developed for Thumtronics by Grey Innovation |
| * Ben Williamson <ben.williamson@greyinnovation.com> |
| * |
| * This software is distributed under the terms of the GNU General Public |
| * License ("GPL") version 2, as published by the Free Software Foundation. |
| * |
| * This file holds USB constants and structures defined |
| * by the USB Device Class Definition for Audio Devices. |
| * Comments below reference relevant sections of that document: |
| * |
| * http://www.usb.org/developers/devclass_docs/audio10.pdf |
| */ |
| |
| #ifndef __LINUX_USB_AUDIO_H |
| #define __LINUX_USB_AUDIO_H |
| |
| #include <linux/types.h> |
| |
| /* A.2 Audio Interface Subclass Codes */ |
| #define USB_SUBCLASS_AUDIOCONTROL 0x01 |
| #define USB_SUBCLASS_AUDIOSTREAMING 0x02 |
| #define USB_SUBCLASS_MIDISTREAMING 0x03 |
| |
| /* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */ |
| #define UAC_HEADER 0x01 |
| #define UAC_INPUT_TERMINAL 0x02 |
| #define UAC_OUTPUT_TERMINAL 0x03 |
| #define UAC_MIXER_UNIT 0x04 |
| #define UAC_SELECTOR_UNIT 0x05 |
| #define UAC_FEATURE_UNIT 0x06 |
| #define UAC_PROCESSING_UNIT 0x07 |
| #define UAC_EXTENSION_UNIT 0x08 |
| |
| /* A.6 Audio Class-Specific AS Interface Descriptor Subtypes */ |
| #define UAC_AS_GENERAL 0x01 |
| #define UAC_FORMAT_TYPE 0x02 |
| #define UAC_FORMAT_SPECIFIC 0x03 |
| |
| /* A.8 Audio Class-Specific Endpoint Descriptor Subtypes */ |
| #define UAC_EP_GENERAL 0x01 |
| |
| /* A.9 Audio Class-Specific Request Codes */ |
| #define UAC_SET_ 0x00 |
| #define UAC_GET_ 0x80 |
| |
| #define UAC__CUR 0x1 |
| #define UAC__MIN 0x2 |
| #define UAC__MAX 0x3 |
| #define UAC__RES 0x4 |
| #define UAC__MEM 0x5 |
| |
| #define UAC_SET_CUR (UAC_SET_ | UAC__CUR) |
| #define UAC_GET_CUR (UAC_GET_ | UAC__CUR) |
| #define UAC_SET_MIN (UAC_SET_ | UAC__MIN) |
| #define UAC_GET_MIN (UAC_GET_ | UAC__MIN) |
| #define UAC_SET_MAX (UAC_SET_ | UAC__MAX) |
| #define UAC_GET_MAX (UAC_GET_ | UAC__MAX) |
| #define UAC_SET_RES (UAC_SET_ | UAC__RES) |
| #define UAC_GET_RES (UAC_GET_ | UAC__RES) |
| #define UAC_SET_MEM (UAC_SET_ | UAC__MEM) |
| #define UAC_GET_MEM (UAC_GET_ | UAC__MEM) |
| |
| #define UAC_GET_STAT 0xff |
| |
| /* MIDI - A.1 MS Class-Specific Interface Descriptor Subtypes */ |
| #define UAC_MS_HEADER 0x01 |
| #define UAC_MIDI_IN_JACK 0x02 |
| #define UAC_MIDI_OUT_JACK 0x03 |
| |
| /* MIDI - A.1 MS Class-Specific Endpoint Descriptor Subtypes */ |
| #define UAC_MS_GENERAL 0x01 |
| |
| /* Terminals - 2.1 USB Terminal Types */ |
| #define UAC_TERMINAL_UNDEFINED 0x100 |
| #define UAC_TERMINAL_STREAMING 0x101 |
| #define UAC_TERMINAL_VENDOR_SPEC 0x1FF |
| |
| /* Terminal Control Selectors */ |
| /* 4.3.2 Class-Specific AC Interface Descriptor */ |
| struct uac_ac_header_descriptor { |
| __u8 bLength; /* 8 + n */ |
| __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ |
| __u8 bDescriptorSubtype; /* UAC_MS_HEADER */ |
| __le16 bcdADC; /* 0x0100 */ |
| __le16 wTotalLength; /* includes Unit and Terminal desc. */ |
| __u8 bInCollection; /* n */ |
| __u8 baInterfaceNr[]; /* [n] */ |
| } __attribute__ ((packed)); |
| |
| #define UAC_DT_AC_HEADER_SIZE(n) (8 + (n)) |
| |
| /* As above, but more useful for defining your own descriptors: */ |
| #define DECLARE_UAC_AC_HEADER_DESCRIPTOR(n) \ |
| struct uac_ac_header_descriptor_##n { \ |
| __u8 bLength; \ |
| __u8 bDescriptorType; \ |
| __u8 bDescriptorSubtype; \ |
| __le16 bcdADC; \ |
| __le16 wTotalLength; \ |
| __u8 bInCollection; \ |
| __u8 baInterfaceNr[n]; \ |
| } __attribute__ ((packed)) |
| |
| /* 4.3.2.1 Input Terminal Descriptor */ |
| struct uac_input_terminal_descriptor { |
| __u8 bLength; /* in bytes: 12 */ |
| __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ |
| __u8 bDescriptorSubtype; /* INPUT_TERMINAL descriptor subtype */ |
| __u8 bTerminalID; /* Constant uniquely terminal ID */ |
| __le16 wTerminalType; /* USB Audio Terminal Types */ |
| __u8 bAssocTerminal; /* ID of the Output Terminal associated */ |
| __u8 bNrChannels; /* Number of logical output channels */ |
| __le16 wChannelConfig; |
| __u8 iChannelNames; |
| __u8 iTerminal; |
| } __attribute__ ((packed)); |
| |
| #define UAC_DT_INPUT_TERMINAL_SIZE 12 |
| |
| /* Terminals - 2.2 Input Terminal Types */ |
| #define UAC_INPUT_TERMINAL_UNDEFINED 0x200 |
| #define UAC_INPUT_TERMINAL_MICROPHONE 0x201 |
| #define UAC_INPUT_TERMINAL_DESKTOP_MICROPHONE 0x202 |
| #define UAC_INPUT_TERMINAL_PERSONAL_MICROPHONE 0x203 |
| #define UAC_INPUT_TERMINAL_OMNI_DIR_MICROPHONE 0x204 |
| #define UAC_INPUT_TERMINAL_MICROPHONE_ARRAY 0x205 |
| #define UAC_INPUT_TERMINAL_PROC_MICROPHONE_ARRAY 0x206 |
| |
| /* 4.3.2.2 Output Terminal Descriptor */ |
| struct uac_output_terminal_descriptor { |
| __u8 bLength; /* in bytes: 9 */ |
| __u8 bDescriptorType; /* CS_INTERFACE descriptor type */ |
| __u8 bDescriptorSubtype; /* OUTPUT_TERMINAL descriptor subtype */ |
| __u8 bTerminalID; /* Constant uniquely terminal ID */ |
| __le16 wTerminalType; /* USB Audio Terminal Types */ |
| __u8 bAssocTerminal; /* ID of the Input Terminal associated */ |
| __u8 bSourceID; /* ID of the connected Unit or Terminal*/ |
| __u8 iTerminal; |
| } __attribute__ ((packed)); |
| |
| #define UAC_DT_OUTPUT_TERMINAL_SIZE 9 |
| |
| /* Terminals - 2.3 Output Terminal Types */ |
| #define UAC_OUTPUT_TERMINAL_UNDEFINED 0x300 |
| #define UAC_OUTPUT_TERMINAL_SPEAKER 0x301 |
| #define UAC_OUTPUT_TERMINAL_HEADPHONES 0x302 |
| #define UAC_OUTPUT_TERMINAL_HEAD_MOUNTED_DISPLAY_AUDIO 0x303 |
| #define UAC_OUTPUT_TERMINAL_DESKTOP_SPEAKER 0x304 |
| #define UAC_OUTPUT_TERMINAL_ROOM_SPEAKER 0x305 |
| #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER 0x306 |
| #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER 0x307 |
| |
| /* Set bControlSize = 2 as default setting */ |
| #define UAC_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 2) |
| |
| /* As above, but more useful for defining your own descriptors: */ |
| #define DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(ch) \ |
| struct uac_feature_unit_descriptor_##ch { \ |
| __u8 bLength; \ |
| __u8 bDescriptorType; \ |
| __u8 bDescriptorSubtype; \ |
| __u8 bUnitID; \ |
| __u8 bSourceID; \ |
| __u8 bControlSize; \ |
| __le16 bmaControls[ch + 1]; \ |
| __u8 iFeature; \ |
| } __attribute__ ((packed)) |
| |
| /* 4.5.2 Class-Specific AS Interface Descriptor */ |
| struct uac_as_header_descriptor { |
| __u8 bLength; /* in bytes: 7 */ |
| __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ |
| __u8 bDescriptorSubtype; /* AS_GENERAL */ |
| __u8 bTerminalLink; /* Terminal ID of connected Terminal */ |
| __u8 bDelay; /* Delay introduced by the data path */ |
| __le16 wFormatTag; /* The Audio Data Format */ |
| } __attribute__ ((packed)); |
| |
| #define UAC_DT_AS_HEADER_SIZE 7 |
| |
| /* Formats - A.1.1 Audio Data Format Type I Codes */ |
| #define UAC_FORMAT_TYPE_I_UNDEFINED 0x0 |
| #define UAC_FORMAT_TYPE_I_PCM 0x1 |
| #define UAC_FORMAT_TYPE_I_PCM8 0x2 |
| #define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3 |
| #define UAC_FORMAT_TYPE_I_ALAW 0x4 |
| #define UAC_FORMAT_TYPE_I_MULAW 0x5 |
| |
| struct uac_format_type_i_continuous_descriptor { |
| __u8 bLength; /* in bytes: 8 + (ns * 3) */ |
| __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ |
| __u8 bDescriptorSubtype; /* FORMAT_TYPE */ |
| __u8 bFormatType; /* FORMAT_TYPE_1 */ |
| __u8 bNrChannels; /* physical channels in the stream */ |
| __u8 bSubframeSize; /* */ |
| __u8 bBitResolution; |
| __u8 bSamFreqType; |
| __u8 tLowerSamFreq[3]; |
| __u8 tUpperSamFreq[3]; |
| } __attribute__ ((packed)); |
| |
| #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14 |
| |
| struct uac_format_type_i_discrete_descriptor { |
| __u8 bLength; /* in bytes: 8 + (ns * 3) */ |
| __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ |
| __u8 bDescriptorSubtype; /* FORMAT_TYPE */ |
| __u8 bFormatType; /* FORMAT_TYPE_1 */ |
| __u8 bNrChannels; /* physical channels in the stream */ |
| __u8 bSubframeSize; /* */ |
| __u8 bBitResolution; |
| __u8 bSamFreqType; |
| __u8 tSamFreq[][3]; |
| } __attribute__ ((packed)); |
| |
| #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \ |
| struct uac_format_type_i_discrete_descriptor_##n { \ |
| __u8 bLength; \ |
| __u8 bDescriptorType; \ |
| __u8 bDescriptorSubtype; \ |
| __u8 bFormatType; \ |
| __u8 bNrChannels; \ |
| __u8 bSubframeSize; \ |
| __u8 bBitResolution; \ |
| __u8 bSamFreqType; \ |
| __u8 tSamFreq[n][3]; \ |
| } __attribute__ ((packed)) |
| |
| #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3)) |
| |
| /* Formats - A.2 Format Type Codes */ |
| #define UAC_FORMAT_TYPE_UNDEFINED 0x0 |
| #define UAC_FORMAT_TYPE_I 0x1 |
| #define UAC_FORMAT_TYPE_II 0x2 |
| #define UAC_FORMAT_TYPE_III 0x3 |
| |
| struct uac_iso_endpoint_descriptor { |
| __u8 bLength; /* in bytes: 7 */ |
| __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */ |
| __u8 bDescriptorSubtype; /* EP_GENERAL */ |
| __u8 bmAttributes; |
| __u8 bLockDelayUnits; |
| __le16 wLockDelay; |
| }; |
| #define UAC_ISO_ENDPOINT_DESC_SIZE 7 |
| |
| #define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01 |
| #define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02 |
| #define UAC_EP_CS_ATTR_FILL_MAX 0x80 |
| |
| /* A.10.2 Feature Unit Control Selectors */ |
| #define UAC_FU_CONTROL_UNDEFINED 0x00 |
| #define UAC_MUTE_CONTROL 0x01 |
| #define UAC_VOLUME_CONTROL 0x02 |
| #define UAC_BASS_CONTROL 0x03 |
| #define UAC_MID_CONTROL 0x04 |
| #define UAC_TREBLE_CONTROL 0x05 |
| #define UAC_GRAPHIC_EQUALIZER_CONTROL 0x06 |
| #define UAC_AUTOMATIC_GAIN_CONTROL 0x07 |
| #define UAC_DELAY_CONTROL 0x08 |
| #define UAC_BASS_BOOST_CONTROL 0x09 |
| #define UAC_LOUDNESS_CONTROL 0x0a |
| |
| #define UAC_FU_MUTE (1 << (UAC_MUTE_CONTROL - 1)) |
| #define UAC_FU_VOLUME (1 << (UAC_VOLUME_CONTROL - 1)) |
| #define UAC_FU_BASS (1 << (UAC_BASS_CONTROL - 1)) |
| #define UAC_FU_MID (1 << (UAC_MID_CONTROL - 1)) |
| #define UAC_FU_TREBLE (1 << (UAC_TREBLE_CONTROL - 1)) |
| #define UAC_FU_GRAPHIC_EQ (1 << (UAC_GRAPHIC_EQUALIZER_CONTROL - 1)) |
| #define UAC_FU_AUTO_GAIN (1 << (UAC_AUTOMATIC_GAIN_CONTROL - 1)) |
| #define UAC_FU_DELAY (1 << (UAC_DELAY_CONTROL - 1)) |
| #define UAC_FU_BASS_BOOST (1 << (UAC_BASS_BOOST_CONTROL - 1)) |
| #define UAC_FU_LOUDNESS (1 << (UAC_LOUDNESS_CONTROL - 1)) |
| |
| #ifdef __KERNEL__ |
| |
| struct usb_audio_control { |
| struct list_head list; |
| const char *name; |
| u8 type; |
| int data[5]; |
| int (*set)(struct usb_audio_control *con, u8 cmd, int value); |
| int (*get)(struct usb_audio_control *con, u8 cmd); |
| }; |
| |
| struct usb_audio_control_selector { |
| struct list_head list; |
| struct list_head control; |
| u8 id; |
| const char *name; |
| u8 type; |
| struct usb_descriptor_header *desc; |
| }; |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* __LINUX_USB_AUDIO_H */ |
