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#define USB_DT_CS_DEVICE 0x21
#define USB_DT_CS_CONFIG 0x22
#define USB_DT_CS_STRING 0x23
#define USB_DT_CS_INTERFACE 0x24
#define USB_DT_CS_ENDPOINT 0x25
#define CS_AUDIO_UNDEFINED 0x20
#define CS_AUDIO_DEVICE 0x21
#define CS_AUDIO_CONFIGURATION 0x22
#define CS_AUDIO_STRING 0x23
#define CS_AUDIO_INTERFACE 0x24
#define CS_AUDIO_ENDPOINT 0x25
#define HEADER 0x01
#define INPUT_TERMINAL 0x02
#define OUTPUT_TERMINAL 0x03
#define MIXER_UNIT 0x04
#define SELECTOR_UNIT 0x05
#define FEATURE_UNIT 0x06
#define PROCESSING_UNIT 0x07
#define EXTENSION_UNIT 0x08
#define AS_GENERAL 0x01
#define FORMAT_TYPE 0x02
#define FORMAT_SPECIFIC 0x03
#define EP_GENERAL 0x01
#define MAX_CHAN 9
#define MAX_FREQ 16
#define MAX_IFACE 8
#define MAX_FORMAT 8
#define MAX_ALT 8
struct usb_audio_terminal
{
u8 flags;
u8 assoc;
u16 type; /* Mic etc */
u8 channels;
u8 source;
u16 chancfg;
};
struct usb_audio_format
{
u8 type;
u8 channels;
u8 num_freq;
u8 sfz;
u8 bits;
u16 freq[MAX_FREQ];
};
struct usb_audio_interface
{
u8 terminal;
u8 delay;
u16 num_formats;
u16 format_type;
u8 flags;
u8 idleconf; /* Idle config */
#define AU_IFACE_FOUND 1
struct usb_audio_format format[MAX_FORMAT];
};
struct usb_audio_device
{
struct list_head list;
u8 mixer;
u8 selector;
void *irq_handle;
u8 num_channels;
u8 num_dsp_iface;
u8 channel_map[MAX_CHAN];
struct usb_audio_terminal terminal[MAX_CHAN];
struct usb_audio_interface interface[MAX_IFACE][MAX_ALT];
};
/* Audio Class specific Request Codes */
#define SET_CUR 0x01
#define GET_CUR 0x81
#define SET_MIN 0x02
#define GET_MIN 0x82
#define SET_MAX 0x03
#define GET_MAX 0x83
#define SET_RES 0x04
#define GET_RES 0x84
#define SET_MEM 0x05
#define GET_MEM 0x85
#define GET_STAT 0xff
/* Terminal Control Selectors */
#define COPY_PROTECT_CONTROL 0x01
/* Feature Unit Control Selectors */
#define MUTE_CONTROL 0x01
#define VOLUME_CONTROL 0x02
#define BASS_CONTROL 0x03
#define MID_CONTROL 0x04
#define TREBLE_CONTROL 0x05
#define GRAPHIC_EQUALIZER_CONTROL 0x06
#define AUTOMATIC_GAIN_CONTROL 0x07
#define DELAY_CONTROL 0x08
#define BASS_BOOST_CONTROL 0x09
#define LOUDNESS_CONTROL 0x0a
/* Endpoint Control Selectors */
#define SAMPLING_FREQ_CONTROL 0x01
#define PITCH_CONTROL 0x02
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