bsd_audioirig.h revision 290001 
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_ */
102