ac97.h

来自「VXWORKS操作系统下的S3C2440声卡驱动源程序」· C头文件 代码 · 共 52 行

/*

  DESCRIPTION 
 
  This file provides definitions for the  stac9766 Codec  and structure
 
  */
#ifndef __INCac97h
#define __INCac97h

#if __cplusplus
extern "C" {
#endif


#define	AC97_INTERNAL_CLOCK_ENABLE	(1<<20)
#define	floop	400
#define		AC97_READ_COMMAND			(1<<23)
#define		AC97_CMD_ADDR_SHIFT			(16)
#define		AC97_CMD_DATA_SHIFT			(0)
/* Defines for the STAC9766 registers*/
#define 	AC97_RESET				0x0000      	
#define 	AC97_MASTER_VOL_STEREO	0x0002  	
#define 	AC97_HEADPHONE_VOL		0x0004    	  	
#define 	AC97_PCMOUT_VOL			0x0018     
#define 	AC97_EXT_AUDIO_CONTROL	0x002A	
#define 	AC97_POWER_CONTROL		0x0026
#define	AC97_PCM_DAC_RATE	0x002c
#define	AC97_PCM_ADC_RATE		0x0032
#define	AC97_GENERAL_PURPOSE		0x0020
#define	AC97_ANALOG_SPEC		0x006e
#define	AC97_RECORD_SELECT	0x001a
#define	AC97_RECORD_GAIN		0x001c
#define	AC97_MIC_VOL		0x000e
/* useful power states*/
#define		AC97_PWR_D0             0x0000      /*everything on*/


typedef struct
{
	DEV_HRD	devHdr;
	BOOL	soundopen;
}SOUND_DEV;


#if __cplusplus
} /* extern "C" */
#endif

#endif  /* __INCac97h */