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      1 /*	$NetBSD: spkrio.h,v 1.3 2017/06/11 03:33:48 nat Exp $	*/
      2 
      3 /*
      4  * spkrio.h -- interface definitions for speaker ioctl()
      5  */
      6 
      7 #ifndef _DEV_SPKRIO_H_
      8 #define _DEV_SPKRIO_H_
      9 
     10 #include <sys/ioccom.h>
     11 
     12 #define SPKRTONE        _IOW('S', 1, tone_t)    /* emit tone */
     13 #define SPKRTUNE        _IO('S', 2)             /* emit tone sequence */
     14 #define SPKRGETVOL      _IOR('S', 3, u_int)     /* get volume */
     15 #define SPKRSETVOL      _IOW('S', 4, u_int)     /* set volume */
     16 
     17 typedef struct {
     18 	int	frequency;	/* in hertz */
     19 	int	duration;	/* in 1/100ths of a second */
     20 } tone_t;
     21 
     22 #endif
     23