1 files changed, 29 insertions, 0 deletions
diff --git a/sys/dev/speaker/speaker.h b/sys/dev/speaker/speaker.h
new file mode 100644
index 0000000..6b1f021
--- /dev/null
+++ b/sys/dev/speaker/speaker.h
@@ -0,0 +1,29 @@
+/*
+ * speaker.h -- interface definitions for speaker ioctl()
+ *
+ * v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
+ *      modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_MACHINE_SPEAKER_H_
+#define	_MACHINE_SPEAKER_H_
+
+#include <sys/ioccom.h>
+
+#define SPKRTONE        _IOW('S', 1, tone_t)    /* emit tone */
+#define SPKRTUNE        _IO('S', 2)             /* emit tone sequence*/
+
+typedef struct
+{
+    int	frequency;	/* in hertz */
+    int duration;	/* in 1/100ths of a second */
+} tone_t;
+
+/*
+ * Strings written to the speaker device are interpreted as tunes and played;
+ * see the spkr(4) man page for details.
+ */
+
+#endif /* !_MACHINE_SPEAKER_H_ */