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#ifndef AC97_MIXER_H
#define AC97_MIXER_H
/* This is a main memory cache copy of the codec's ac97 configuration
registers. See Intel's Audio Codec 97 standard (rev2.3) for info. */
typedef struct ac97_struct {
u16_t Reset; /* 0x00 */
u16_t MasterVolume; /* 0x02 */
u16_t AUXOutVolume; /* 0x04 */
u16_t MonoVolume; /* 0x06 */
u16_t MasterTone; /* 0x08 */
u16_t PCBeepVolume; /* 0x0A */
u16_t PhoneVolume; /* 0x0C */
u16_t MicVolume; /* 0x0E */
u16_t LineInVolume; /* 0x10 */
u16_t CDVolume; /* 0x12 */
u16_t VideoVolume; /* 0x14 */
u16_t AUXInVolume; /* 0x16 */
u16_t PCMOutVolume; /* 0x18 */
u16_t RecordSelect; /* 0x1A */
u16_t RecordGain; /* 0x1C */
u16_t RecordGainMic; /* 0x1E */
u16_t GeneralPurpose; /* 0x20 */
u16_t Control3D; /* 0x22 */
u16_t AudioIntAndPaging; /* 0x24 */
u16_t PowerdownControlAndStat; /* 0x26 */
u16_t ExtendedAudio1; /* 0x28 */
u16_t ExtendedAudio2; /* 0x2A */
/* ... */
u16_t VendorID1; /* 0x7C */
u16_t VendorID2; /* 0x7E */
} ac97_t;
/* Source and output volume control register defines */
#define AC97_MASTER_VOLUME 0x02U /* Master out */
#define AC97_AUX_OUT_VOLUME 0x04U /* Auxiliary out volume */
#define AC97_MONO_VOLUME 0x06U /* Mono out volume */
#define AC97_MASTER_TONE 0x08U /* high byte= bass, low byte= treble*/
#define AC97_PC_BEEP_VOLUME 0x0aU /* PC speaker volume */
#define AC97_PHONE_VOLUME 0x0cU /* Phone volume */
#define AC97_MIC_VOLUME 0x0eU /* Mic, mono */
#define AC97_LINE_IN_VOLUME 0x10U /* Line volume */
#define AC97_CD_VOLUME 0x12U /* CD audio volume */
#define AC97_VIDEO_VOLUME 0x14U /* Video (TV) volume */
#define AC97_AUX_IN_VOLUME 0x16U /* Aux line source, left */
#define AC97_PCM_OUT_VOLUME 0x18U /* The DACs - wav+synth */
#define AC97_RECORD_GAIN_VOLUME 0x1cU /* Record input level */
/* Other CODEC control register defines */
#define AC97_RESET 0x00U /* any write here to reset CODEC */
#define AC97_GENERAL_PURPOSE 0x20U /* */
#define AC97_POWERDOWN_CONTROL_STAT 0x26U /* */
#define AC97_RECORD_SELECT 0x1aU /* record mux select */
#define AC97_VENDOR_ID1 0x7cU /* 1st two Vendor ID bytes */
#define AC97_VENDOR_ID2 0x7eU /* last Vendor ID byte plus rev. number */
/* Record Select defines */
#define AC97_RECORD_MIC 0
#define AC97_RECORD_CD 1
#define AC97_RECORD_VIDEO 2
#define AC97_RECORD_AUX 3
#define AC97_RECORD_LINE 4
#define AC97_RECORD_STEREO_MIX 5
#define AC97_RECORD_MONO_MIX 6
#define AC97_RECORD_PHONE 7
#define MASTER_VOL_MASK 0x1F
#define DAC_VOL_MASK 0x1F
#define AUX_IN_VOL_MASK 0x1F
#define MUTE_MASK 0x8000
#endif /* AC97_MIXER_H */
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