[deliverable/linux.git] / drivers / isdn / hisax / fsm.c

/* $Id: fsm.c,v 1.14.6.4 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.
 *
 * Thanks to    Jan den Ouden
 *              Fritz Elfert
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include "hisax.h"

#define FSM_TIMER_DEBUG 0

int
FsmNew(struct Fsm *fsm, struct FsmNode *fnlist, int fncount)
{
	int i;

	fsm->jumpmatrix = (FSMFNPTR *)
		kzalloc(sizeof (FSMFNPTR) * fsm->state_count * fsm->event_count, GFP_KERNEL);
	if (!fsm->jumpmatrix)
		return -ENOMEM;

	for (i = 0; i < fncount; i++) 
		if ((fnlist[i].state>=fsm->state_count) || (fnlist[i].event>=fsm->event_count)) {
			printk(KERN_ERR "FsmNew Error line %d st(%ld/%ld) ev(%ld/%ld)\n",
				i,(long)fnlist[i].state,(long)fsm->state_count,
				(long)fnlist[i].event,(long)fsm->event_count);
		} else		
			fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
				fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
	return 0;
}

void
FsmFree(struct Fsm *fsm)
{
	kfree((void *) fsm->jumpmatrix);
}

int
FsmEvent(struct FsmInst *fi, int event, void *arg)
{
	FSMFNPTR r;

	if ((fi->state>=fi->fsm->state_count) || (event >= fi->fsm->event_count)) {
		printk(KERN_ERR "FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
			(long)fi->state,(long)fi->fsm->state_count,event,(long)fi->fsm->event_count);
		return(1);
	}
	r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
	if (r) {
		if (fi->debug)
			fi->printdebug(fi, "State %s Event %s",
				fi->fsm->strState[fi->state],
				fi->fsm->strEvent[event]);
		r(fi, event, arg);
		return (0);
	} else {
		if (fi->debug)
			fi->printdebug(fi, "State %s Event %s no routine",
				fi->fsm->strState[fi->state],
				fi->fsm->strEvent[event]);
		return (!0);
	}
}

void
FsmChangeState(struct FsmInst *fi, int newstate)
{
	fi->state = newstate;
	if (fi->debug)
		fi->printdebug(fi, "ChangeState %s",
			fi->fsm->strState[newstate]);
}

static void
FsmExpireTimer(struct FsmTimer *ft)
{
#if FSM_TIMER_DEBUG
	if (ft->fi->debug)
		ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
#endif
	FsmEvent(ft->fi, ft->event, ft->arg);
}

void
FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
{
	ft->fi = fi;
	ft->tl.function = (void *) FsmExpireTimer;
	ft->tl.data = (long) ft;
#if FSM_TIMER_DEBUG
	if (ft->fi->debug)
		ft->fi->printdebug(ft->fi, "FsmInitTimer %lx", (long) ft);
#endif
	init_timer(&ft->tl);
}

void
FsmDelTimer(struct FsmTimer *ft, int where)
{
#if FSM_TIMER_DEBUG
	if (ft->fi->debug)
		ft->fi->printdebug(ft->fi, "FsmDelTimer %lx %d", (long) ft, where);
#endif
	del_timer(&ft->tl);
}

int
FsmAddTimer(struct FsmTimer *ft,
	    int millisec, int event, void *arg, int where)
{

#if FSM_TIMER_DEBUG
	if (ft->fi->debug)
		ft->fi->printdebug(ft->fi, "FsmAddTimer %lx %d %d",
			(long) ft, millisec, where);
#endif

	if (timer_pending(&ft->tl)) {
		printk(KERN_WARNING "FsmAddTimer: timer already active!\n");
		ft->fi->printdebug(ft->fi, "FsmAddTimer already active!");
		return -1;
	}
	init_timer(&ft->tl);
	ft->event = event;
	ft->arg = arg;
	ft->tl.expires = jiffies + (millisec * HZ) / 1000;
	add_timer(&ft->tl);
	return 0;
}

void
FsmRestartTimer(struct FsmTimer *ft,
	    int millisec, int event, void *arg, int where)
{

#if FSM_TIMER_DEBUG
	if (ft->fi->debug)
		ft->fi->printdebug(ft->fi, "FsmRestartTimer %lx %d %d",
			(long) ft, millisec, where);
#endif

	if (timer_pending(&ft->tl))
		del_timer(&ft->tl);
	init_timer(&ft->tl);
	ft->event = event;
	ft->arg = arg;
	ft->tl.expires = jiffies + (millisec * HZ) / 1000;
	add_timer(&ft->tl);
}
Commit	Line	Data
1da177e4 LT	1	/* $Id: fsm.c,v 1.14.6.4 2001/09/23 22:24:47 kai Exp $
	2	*
	3	* Finite state machine
	4	*
	5	* Author Karsten Keil
	6	* Copyright by Karsten Keil <keil@isdn4linux.de>
	7	* by Kai Germaschewski <kai.germaschewski@gmx.de>
	8	*
	9	* This software may be used and distributed according to the terms
	10	* of the GNU General Public License, incorporated herein by reference.
	11	*
	12	* Thanks to Jan den Ouden
	13	* Fritz Elfert
	14	*
	15	*/
	16
	17	#include <linux/module.h>
	18	#include <linux/init.h>
	19	#include "hisax.h"
	20
	21	#define FSM_TIMER_DEBUG 0
	22
	23	int
	24	FsmNew(struct Fsm fsm, struct FsmNode fnlist, int fncount)
	25	{
	26	int i;
	27
	28	fsm->jumpmatrix = (FSMFNPTR *)
41f96935	29	kzalloc(sizeof (FSMFNPTR) * fsm->state_count * fsm->event_count, GFP_KERNEL);
1da177e4 LT	30	if (!fsm->jumpmatrix)
	31	return -ENOMEM;
	32
1da177e4 LT	33	for (i = 0; i < fncount; i++)
	34	if ((fnlist[i].state>=fsm->state_count) \|\| (fnlist[i].event>=fsm->event_count)) {
	35	printk(KERN_ERR "FsmNew Error line %d st(%ld/%ld) ev(%ld/%ld)\n",
	36	i,(long)fnlist[i].state,(long)fsm->state_count,
	37	(long)fnlist[i].event,(long)fsm->event_count);
	38	} else
	39	fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
	40	fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
	41	return 0;
	42	}
	43
	44	void
	45	FsmFree(struct Fsm *fsm)
	46	{
	47	kfree((void *) fsm->jumpmatrix);
	48	}
	49
	50	int
	51	FsmEvent(struct FsmInst fi, int event, void arg)
	52	{
	53	FSMFNPTR r;
	54
	55	if ((fi->state>=fi->fsm->state_count) \|\| (event >= fi->fsm->event_count)) {
	56	printk(KERN_ERR "FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
	57	(long)fi->state,(long)fi->fsm->state_count,event,(long)fi->fsm->event_count);
	58	return(1);
	59	}
	60	r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
	61	if (r) {
	62	if (fi->debug)
	63	fi->printdebug(fi, "State %s Event %s",
	64	fi->fsm->strState[fi->state],
	65	fi->fsm->strEvent[event]);
	66	r(fi, event, arg);
	67	return (0);
	68	} else {
	69	if (fi->debug)
	70	fi->printdebug(fi, "State %s Event %s no routine",
	71	fi->fsm->strState[fi->state],
	72	fi->fsm->strEvent[event]);
	73	return (!0);
	74	}
	75	}
	76
	77	void
	78	FsmChangeState(struct FsmInst *fi, int newstate)
	79	{
	80	fi->state = newstate;
	81	if (fi->debug)
	82	fi->printdebug(fi, "ChangeState %s",
	83	fi->fsm->strState[newstate]);
	84	}
	85
	86	static void
	87	FsmExpireTimer(struct FsmTimer *ft)
	88	{
	89	#if FSM_TIMER_DEBUG
	90	if (ft->fi->debug)
	91	ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
	92	#endif
	93	FsmEvent(ft->fi, ft->event, ft->arg);
	94	}
	95
	96	void
97	FsmInitTimer(struct FsmInst fi, struct FsmTimer ft)
98	{
99	ft->fi = fi;
100	ft->tl.function = (void *) FsmExpireTimer;
101	ft->tl.data = (long) ft;
102	#if FSM_TIMER_DEBUG
103	if (ft->fi->debug)
104	ft->fi->printdebug(ft->fi, "FsmInitTimer %lx", (long) ft);
105	#endif
106	init_timer(&ft->tl);
107	}
108
109	void
110	FsmDelTimer(struct FsmTimer *ft, int where)
111	{
112	#if FSM_TIMER_DEBUG
113	if (ft->fi->debug)
114	ft->fi->printdebug(ft->fi, "FsmDelTimer %lx %d", (long) ft, where);
115	#endif
116	del_timer(&ft->tl);
117	}
118
119	int
120	FsmAddTimer(struct FsmTimer *ft,
121	int millisec, int event, void *arg, int where)
122	{
123
124	#if FSM_TIMER_DEBUG
125	if (ft->fi->debug)
126	ft->fi->printdebug(ft->fi, "FsmAddTimer %lx %d %d",
127	(long) ft, millisec, where);
128	#endif
129
130	if (timer_pending(&ft->tl)) {
131	printk(KERN_WARNING "FsmAddTimer: timer already active!\n");
132	ft->fi->printdebug(ft->fi, "FsmAddTimer already active!");
133	return -1;
134	}
135	init_timer(&ft->tl);
136	ft->event = event;
137	ft->arg = arg;
138	ft->tl.expires = jiffies + (millisec * HZ) / 1000;
139	add_timer(&ft->tl);
140	return 0;
141	}
142
143	void
144	FsmRestartTimer(struct FsmTimer *ft,
145	int millisec, int event, void *arg, int where)
146	{
147
148	#if FSM_TIMER_DEBUG
149	if (ft->fi->debug)
150	ft->fi->printdebug(ft->fi, "FsmRestartTimer %lx %d %d",
151	(long) ft, millisec, where);
152	#endif
153
154	if (timer_pending(&ft->tl))
155	del_timer(&ft->tl);
156	init_timer(&ft->tl);
157	ft->event = event;
158	ft->arg = arg;
159	ft->tl.expires = jiffies + (millisec * HZ) / 1000;
160	add_timer(&ft->tl);
161	}