ac97.h

此代码为WCE5.0下声卡的源代码

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
// -----------------------------------------------------------------------------
//
//      THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
//      ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
//      THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
//      PARTICULAR PURPOSE.
//  
// -----------------------------------------------------------------------------

//
// ac97.h 
// 
// definitions for the AC97, Intel's Audio Codec 97 Spec
//

#ifndef _AC97_H_
#define _AC97_H_

                                             // conections on concert 97
#define  AC97_RESET              0x0000      // 
#define  AC97_MASTER_VOL_STEREO  0x0002      // Line Out
#define  AC97_HEADPHONE_VOL      0x0004      // 
#define  AC97_MASTER_VOL_MONO    0x0006      // TAD Output
#define  AC97_MASTER_TONE        0x0008      //
#define  AC97_PCBEEP_VOL         0x000a      // none
#define  AC97_PHONE_VOL          0x000c      // TAD Input (mono)
#define  AC97_MIC_VOL            0x000e      // MIC Input (mono)
#define  AC97_LINEIN_VOL         0x0010      // Line Input (stereo)
#define  AC97_CD_VOL             0x0012      // CD Input (stereo)
#define  AC97_VIDEO_VOL          0x0014      // none
#define  AC97_AUX_VOL            0x0016      // Aux Input (stereo)
#define  AC97_PCMOUT_VOL         0x0018      // Wave Output (stereo)
#define  AC97_RECORD_SELECT      0x001a      //
#define  AC97_RECORD_GAIN        0x001c
#define  AC97_RECORD_GAIN_MIC    0x001e
#define  AC97_GENERAL_PURPOSE    0x0020
#define  AC97_3D_CONTROL         0x0022
#define  AC97_MODEM_RATE         0x0024
#define  AC97_POWER_CONTROL      0x0026

// registers 0x0028 - 0x0058 are reserved

// registers 0x005a - 0x007a are vendor reserved

#define  AC97_VENDOR_ID1         0x007C
#define  AC97_VENDOR_ID2         0x007E

// Known AC97 codec vendors
#define AC97_VENDOR_CRYSTAL      0x43525900  // Crystal Semicondutor "CRY"
#define AC97_VENDOR_TRITECH      0x54524100  // TriTech "TRA"
#define AC97_VENDOR_AKM          0x414B4D00  // Asahi Kasei "AKM"
#define AC97_VENDOR_SIGMATEL     0x83847600  // SigmaTel


// volume control bit defines

#define AC97_MUTE                0x8000
#define AC97_MICBOOST            0x0040
#define AC97_LEFTVOL             0x3f00
#define AC97_RIGHTVOL            0x003f

// record mux defines

#define AC97_RECMUX_MIC          0x0000
#define AC97_RECMUX_CD           0x0101
#define AC97_RECMUX_VIDEO        0x0202      // not used
#define AC97_RECMUX_AUX          0x0303      
#define AC97_RECMUX_LINE         0x0404      
#define AC97_RECMUX_STEREO_MIX   0x0505
#define AC97_RECMUX_MONO_MIX     0x0606
#define AC97_RECMUX_PHONE        0x0707


// general purpose register bit defines

#define AC97_GP_LPBK             0x0080      // Loopback mode
#define AC97_GP_MS               0x0100      // Mic Select 0=Mic1, 1=Mic2
#define AC97_GP_MIX              0x0200      // Mono output select 0=Mix, 1=Mic
#define AC97_GP_RLBK             0x0400      // Remote Loopback - Modem line codec
#define AC97_GP_LLBK             0x0800      // Local Loopback - Modem Line codec
#define AC97_GP_LD               0x1000      // Loudness 1=on
#define AC97_GP_3D               0x2000      // 3D Enhancement 1=on
#define AC97_GP_ST               0x4000      // Stereo Enhancement 1=on
#define AC97_GP_POP              0x8000      // Pcm Out Path, 0=pre 3D, 1=post 3D


// powerdown control and status bit defines

// status
#define AC97_PWR_MDM             0x0010      // Modem section ready
#define AC97_PWR_REF             0x0008      // Vref nominal
#define AC97_PWR_ANL             0x0004      // Analog section ready
#define AC97_PWR_DAC             0x0002      // DAC section ready
#define AC97_PWR_ADC             0x0001      // ADC section ready

// control
#define AC97_PWR_PR0             0x0100      // ADC and Mux powerdown
#define AC97_PWR_PR1             0x0200      // DAC powerdown
#define AC97_PWR_PR2             0x0400      // Output mixer powerdown (Vref on)
#define AC97_PWR_PR3             0x0800      // Output mixer powerdown (Vref off)
#define AC97_PWR_PR4             0x1000      // AC-link powerdown
#define AC97_PWR_PR5             0x2000      // Internal Clk disable
#define AC97_PWR_PR6             0x4000      // HP amp powerdown
#define AC97_PWR_PR7             0x8000      // Modem off - if supported

// useful power states
#define AC97_PWR_D0              0x0000      // everything on
#define AC97_PWR_D1              AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR4
#define AC97_PWR_D2              AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR2|AC97_PWR_PR3|AC97_PWR_PR4
#define AC97_PWR_D3              AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR2|AC97_PWR_PR3|AC97_PWR_PR4
#define AC97_PWR_ANLOFF          AC97_PWR_PR2|AC97_PWR_PR3  //analog section off

#endif // _AC97_H_