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

https://bitbucket.org/freebsd/freebsd-head/ · C++ Header · 101 lines · 65 code · 12 blank · 24 comment · 4 complexity · 919d0329f6372485a637c327f95b9efc MD5 · raw file 

    

  1. /*
    2. 

  2.  *	$Header: bsd_audioirig.h,v 1.0 93/08/02 12:42:00
    3. 

  3.  */
    4. 

  4. 

  5. #ifndef _BSD_AUDIOIRIG_H_
    6. 

  6. #define _BSD_AUDIOIRIG_H_
    7. 

  7. 

  8. #include <sys/time.h>
    9. 

  9. 

  10. /********************************************************************/
    11. 

  11. /* user interface */
    12. 

  12. 

  13. /*
    14. 

  14.  * irig ioctls
    15. 

  15.  */
    16. 

  16. #if defined(__STDC__) || (!defined(sun) && !defined(ibm032) && !defined(__GNUC))
    17. 

  17. #define AUDIO_IRIG_OPEN         _IO('A', 50)
    18. 

  18. #define AUDIO_IRIG_CLOSE        _IO('A', 51)
    19. 

  19. #define AUDIO_IRIG_SETFORMAT    _IOWR('A', 52, int)
    20. 

  20. #else
    21. 

  21. #define AUDIO_IRIG_OPEN         _IO(A, 50)
    22. 

  22. #define AUDIO_IRIG_CLOSE        _IO(A, 51)
    23. 

  23. #define AUDIO_IRIG_SETFORMAT    _IOWR(A, 52, int)
    24. 

  24. #endif
    25. 

  25. 

  26. /*
    27. 

  27.  * irig error codes
    28. 

  28.  */
    29. 

  29. #define AUDIO_IRIG_BADSIGNAL	0x01
    30. 

  30. #define AUDIO_IRIG_BADDATA	0x02
    31. 

  31. #define AUDIO_IRIG_BADSYNC	0x04
    32. 

  32. #define AUDIO_IRIG_BADCLOCK	0x08
    33. 

  33. #define AUDIO_IRIG_OLDDATA	0x10
    34. 

  34. 

  35. /********************************************************************/
    36. 

  36. 

  37. /*
    38. 

  38.  * auib definitions
    39. 

  39.  */
    40. 

  40. #define AUIB_SIZE	(0x0040)
    41. 

  41. #define AUIB_INC	(0x0008)
    42. 

  42. #define AUIB_MOD(k)	((k) & 0x0038)
    43. 

  43. #define AUIB_INIT(ib)	((ib)->ib_head = (ib)->ib_tail = (ib)->ib_lock = \
    44. 

  44. 			 (ib)->phase = (ib)->shi = (ib)->slo = (ib)->high = \
    45. 

  45. 			 (ib)->level0 = (ib)->level1 = \
    46. 

  46. 			 (ib)->shift[0] = (ib)->shift[1] = (ib)->shift[2] = \
    47. 

  47. 			 (ib)->shift[3] = (ib)->sdata[0] = (ib)->sdata[1] = \
    48. 

  48. 			 (ib)->sdata[2] = (ib)->sdata[3] = (ib)->err = 0)
    49. 

  49. #define AUIB_EMPTY(ib)	((ib)->ib_head == (ib)->ib_tail)
    50. 

  50. #define AUIB_LEN(ib)	(AUIB_MOD((ib)->ib_tail - (ib)->ib_head))
    51. 

  51. #define AUIB_LEFT(ib)	(AUIB_MOD((ib)->ib_head - (ib)->ib_tail - 1))
    52. 

  52. #define IRIGDELAY 3
    53. 

  53. #define IRIGLEVEL 1355
    54. 

  54. 

  55. #ifndef LOCORE
    56. 

  56. /*
    57. 

  57.  * irig_time holds IRIG data for one second
    58. 

  58.  */
    59. 

  59. struct irig_time {
    60. 

  60.         struct timeval  stamp;          /* timestamp */
    61. 

  61.         u_char  bits[13];               /* 100 irig data bits */
    62. 

  62. 	u_char	status;			/* status byte */
    63. 

  63.         char    time[14];               /* time string */
    64. 

  64. };
    65. 

  65. 

  66. /*
    67. 

  67.  * auib's are used for IRIG data communication between the trap
    68. 

  68.  * handler and the software interrupt.
    69. 

  69.  */
    70. 

  70. struct auib {
    71. 

  71. 	/* driver variables */
    72. 

  72. 	u_short	active;			/* 0=inactive, else=active */
    73. 

  73. 	u_short	format;			/* time output format */
    74. 

  74. 	struct	irig_time timestr;	/* time structure */
    75. 

  75. 	char	buffer[14];		/* output formation buffer */
    76. 

  76. 

  77. 	/* hardware interrupt variables */
    78. 

  78. 	struct	timeval tv1,tv2,tv3;	/* time stamps (median filter) */
    79. 

  79. 	int	level0,level1;		/* lo/hi input levels */
    80. 

  80. 	int	level;			/* decision level */
    81. 

  81. 	int	high;			/* recent largest sample */
    82. 

  82. 	int	sl0,sl1;		/* recent sample levels */
    83. 

  83. 	int	lasts;			/* last sample value */
    84. 

  84. 	u_short	scount;			/* sample count */
    85. 

  85. 	u_long	eacc;			/* 10-bit element accumulator */
    86. 

  86. 	u_long	ebit;			/* current bit in element */
    87. 

  87. 	u_char	r_level,mmr1;		/* recording level 0-255 */
    88. 

  88. 	int	shi,slo,phase;		/* AGC variables */
    89. 

  89. 	u_long	err;			/* error status bits */
    90. 

  90. 	int	ecount;			/* count of elements this second */
    91. 

  91. 	long	shift[4];		/* shift register of pos ident */
    92. 

  92. 	long	sdata[4];		/* shift register of symbols */
    93. 

  93. 

  94. 	int	ib_head;		/* queue head */
    95. 

  95. 	int	ib_tail;		/* queue tail */
    96. 

  96. 	u_short	ib_lock;		/* queue head lock */
    97. 

  97. 	u_long	ib_data[AUIB_SIZE];	/* data buffer */
    98. 

  98. };
    99. 

  99. #endif
    100. 

  100. 

  101. #endif /* _BSD_AUDIOIRIG_H_ */
    102.