diff --git a/drivers/isdn/hisax/fsm.h b/drivers/isdn/hisax/fsm.h
new file mode 100644
index 0000000..f02f7da
--- /dev/null
+++ b/drivers/isdn/hisax/fsm.h
@@ -0,0 +1,61 @@
+/* $Id: fsm.h,v 1.3.2.2 2001/09/23 22:24:47 kai Exp $
+ *
+ * Finite state machine
+ *
+ * Author       Karsten Keil
+ * Copyright    by Karsten Keil      <keil@isdn4linux.de>
+ *              by Kai Germaschewski <kai.germaschewski@gmx.de>
+ * 
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ */
+
+#ifndef __FSM_H__
+#define __FSM_H__
+
+#include <linux/timer.h>
+
+struct FsmInst;
+
+typedef void (* FSMFNPTR)(struct FsmInst *, int, void *);
+
+struct Fsm {
+	FSMFNPTR *jumpmatrix;
+	int state_count, event_count;
+	char **strEvent, **strState;
+};
+
+struct FsmInst {
+	struct Fsm *fsm;
+	int state;
+	int debug;
+	void *userdata;
+	int userint;
+	void (*printdebug) (struct FsmInst *, char *, ...);
+};
+
+struct FsmNode {
+	int state, event;
+	void (*routine) (struct FsmInst *, int, void *);
+};
+
+struct FsmTimer {
+	struct FsmInst *fi;
+	struct timer_list tl;
+	int event;
+	void *arg;
+};
+
+int FsmNew(struct Fsm *fsm, struct FsmNode *fnlist, int fncount);
+void FsmFree(struct Fsm *fsm);
+int FsmEvent(struct FsmInst *fi, int event, void *arg);
+void FsmChangeState(struct FsmInst *fi, int newstate);
+void FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft);
+int FsmAddTimer(struct FsmTimer *ft, int millisec, int event,
+		void *arg, int where);
+void FsmRestartTimer(struct FsmTimer *ft, int millisec, int event,
+		     void *arg, int where);
+void FsmDelTimer(struct FsmTimer *ft, int where);
+
+#endif