1 /* $NetBSD: spkrio.h,v 1.2 2016/12/09 04:46:39 christos 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 15 typedef struct { 16 int frequency; /* in hertz */ 17 int duration; /* in 1/100ths of a second */ 18 } tone_t; 19 20 #endif 21