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