1 /*
2 * speaker.h -- interface definitions for speaker ioctl()
3 *
4 * v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
5 * modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
6 *
7 * $FreeBSD: releng/5.0/sys/i386/include/speaker.h 105777 2002-10-23 10:14:30Z markm $
8 */
9
10 #ifndef _MACHINE_SPEAKER_H_
11 #define _MACHINE_SPEAKER_H_
12
13 #include <sys/ioccom.h>
14
15 #define SPKRTONE _IOW('S', 1, tone_t) /* emit tone */
16 #define SPKRTUNE _IO('S', 2) /* emit tone sequence*/
17
18 typedef struct
19 {
20 int frequency; /* in hertz */
21 int duration; /* in 1/100ths of a second */
22 } tone_t;
23
24 /*
25 * Strings written to the speaker device are interpreted as tunes and played;
26 * see the spkr(4) man page for details.
27 */
28
29 #endif /* !_MACHINE_SPEAKER_H_ */
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