/contrib/ntp/kernel/sys/bsd_audioirig.h

  1/*
  2 *	$Header: bsd_audioirig.h,v 1.0 93/08/02 12:42:00
  3 */
  4
  5#ifndef _BSD_AUDIOIRIG_H_
  6#define _BSD_AUDIOIRIG_H_
  7
  8#include <sys/time.h>
  9
 10/********************************************************************/
 11/* user interface */
 12
 13/*
 14 * irig ioctls
 15 */
 16#if defined(__STDC__) || (!defined(sun) && !defined(ibm032) && !defined(__GNUC))
 17#define AUDIO_IRIG_OPEN         _IO('A', 50)
 18#define AUDIO_IRIG_CLOSE        _IO('A', 51)
 19#define AUDIO_IRIG_SETFORMAT    _IOWR('A', 52, int)
 20#else
 21#define AUDIO_IRIG_OPEN         _IO(A, 50)
 22#define AUDIO_IRIG_CLOSE        _IO(A, 51)
 23#define AUDIO_IRIG_SETFORMAT    _IOWR(A, 52, int)
 24#endif
 25
 26/*
 27 * irig error codes
 28 */
 29#define AUDIO_IRIG_BADSIGNAL	0x01
 30#define AUDIO_IRIG_BADDATA	0x02
 31#define AUDIO_IRIG_BADSYNC	0x04
 32#define AUDIO_IRIG_BADCLOCK	0x08
 33#define AUDIO_IRIG_OLDDATA	0x10
 34
 35/********************************************************************/
 36
 37/*
 38 * auib definitions
 39 */
 40#define AUIB_SIZE	(0x0040)
 41#define AUIB_INC	(0x0008)
 42#define AUIB_MOD(k)	((k) & 0x0038)
 43#define AUIB_INIT(ib)	((ib)->ib_head = (ib)->ib_tail = (ib)->ib_lock = \
 44			 (ib)->phase = (ib)->shi = (ib)->slo = (ib)->high = \
 45			 (ib)->level0 = (ib)->level1 = \
 46			 (ib)->shift[0] = (ib)->shift[1] = (ib)->shift[2] = \
 47			 (ib)->shift[3] = (ib)->sdata[0] = (ib)->sdata[1] = \
 48			 (ib)->sdata[2] = (ib)->sdata[3] = (ib)->err = 0)
 49#define AUIB_EMPTY(ib)	((ib)->ib_head == (ib)->ib_tail)
 50#define AUIB_LEN(ib)	(AUIB_MOD((ib)->ib_tail - (ib)->ib_head))
 51#define AUIB_LEFT(ib)	(AUIB_MOD((ib)->ib_head - (ib)->ib_tail - 1))
 52#define IRIGDELAY 3
 53#define IRIGLEVEL 1355
 54
 55#ifndef LOCORE
 56/*
 57 * irig_time holds IRIG data for one second
 58 */
 59struct irig_time {
 60        struct timeval  stamp;          /* timestamp */
 61        u_char  bits[13];               /* 100 irig data bits */
 62	u_char	status;			/* status byte */
 63        char    time[14];               /* time string */
 64};
 65
 66/*
 67 * auib's are used for IRIG data communication between the trap
 68 * handler and the software interrupt.
 69 */
 70struct auib {
 71	/* driver variables */
 72	u_short	active;			/* 0=inactive, else=active */
 73	u_short	format;			/* time output format */
 74	struct	irig_time timestr;	/* time structure */
 75	char	buffer[14];		/* output formation buffer */
 76
 77	/* hardware interrupt variables */
 78	struct	timeval tv1,tv2,tv3;	/* time stamps (median filter) */
 79	int	level0,level1;		/* lo/hi input levels */
 80	int	level;			/* decision level */
 81	int	high;			/* recent largest sample */
 82	int	sl0,sl1;		/* recent sample levels */
 83	int	lasts;			/* last sample value */
 84	u_short	scount;			/* sample count */
 85	u_long	eacc;			/* 10-bit element accumulator */
 86	u_long	ebit;			/* current bit in element */
 87	u_char	r_level,mmr1;		/* recording level 0-255 */
 88	int	shi,slo,phase;		/* AGC variables */
 89	u_long	err;			/* error status bits */
 90	int	ecount;			/* count of elements this second */
 91	long	shift[4];		/* shift register of pos ident */
 92	long	sdata[4];		/* shift register of symbols */
 93
 94	int	ib_head;		/* queue head */
 95	int	ib_tail;		/* queue tail */
 96	u_short	ib_lock;		/* queue head lock */
 97	u_long	ib_data[AUIB_SIZE];	/* data buffer */
 98};
 99#endif
100
101#endif /* _BSD_AUDIOIRIG_H_ */