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