File: /usr/src/linux/drivers/isdn/hisax/fsm.c
1 /* $Id: fsm.c,v 1.14.6.3 2001/08/23 19:44:23 kai Exp $
2 *
3 * Author Karsten Keil (keil@isdn4linux.de)
4 * based on the teles driver from Jan den Ouden
5 *
6 * Thanks to Jan den Ouden
7 * Fritz Elfert
8 *
9 * This file is (c) under GNU General Public License
10 *
11 */
12 #define __NO_VERSION__
13 #include <linux/init.h>
14 #include "hisax.h"
15
16 #define FSM_TIMER_DEBUG 0
17
18 EXPORT_SYMBOL(FsmNew);
19 EXPORT_SYMBOL(FsmFree);
20 EXPORT_SYMBOL(FsmEvent);
21 EXPORT_SYMBOL(FsmChangeState);
22 EXPORT_SYMBOL(FsmInitTimer);
23 EXPORT_SYMBOL(FsmDelTimer);
24 EXPORT_SYMBOL(FsmRestartTimer);
25
26 int __init
27 FsmNew(struct Fsm *fsm, struct FsmNode *fnlist, int fncount)
28 {
29 int i;
30
31 fsm->jumpmatrix = (FSMFNPTR *)
32 kmalloc(sizeof (FSMFNPTR) * fsm->state_count * fsm->event_count, GFP_KERNEL);
33 if (!fsm->jumpmatrix)
34 return -ENOMEM;
35
36 memset(fsm->jumpmatrix, 0, sizeof (FSMFNPTR) * fsm->state_count * fsm->event_count);
37
38 for (i = 0; i < fncount; i++)
39 if ((fnlist[i].state>=fsm->state_count) || (fnlist[i].event>=fsm->event_count)) {
40 printk(KERN_ERR "FsmNew Error line %d st(%ld/%ld) ev(%ld/%ld)\n",
41 i,(long)fnlist[i].state,(long)fsm->state_count,
42 (long)fnlist[i].event,(long)fsm->event_count);
43 } else
44 fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
45 fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
46 return 0;
47 }
48
49 void
50 FsmFree(struct Fsm *fsm)
51 {
52 kfree((void *) fsm->jumpmatrix);
53 }
54
55 int
56 FsmEvent(struct FsmInst *fi, int event, void *arg)
57 {
58 FSMFNPTR r;
59
60 if ((fi->state>=fi->fsm->state_count) || (event >= fi->fsm->event_count)) {
61 printk(KERN_ERR "FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
62 (long)fi->state,(long)fi->fsm->state_count,event,(long)fi->fsm->event_count);
63 return(1);
64 }
65 r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
66 if (r) {
67 if (fi->debug)
68 fi->printdebug(fi, "State %s Event %s",
69 fi->fsm->strState[fi->state],
70 fi->fsm->strEvent[event]);
71 r(fi, event, arg);
72 return (0);
73 } else {
74 if (fi->debug)
75 fi->printdebug(fi, "State %s Event %s no routine",
76 fi->fsm->strState[fi->state],
77 fi->fsm->strEvent[event]);
78 return (!0);
79 }
80 }
81
82 void
83 FsmChangeState(struct FsmInst *fi, int newstate)
84 {
85 fi->state = newstate;
86 if (fi->debug)
87 fi->printdebug(fi, "ChangeState %s",
88 fi->fsm->strState[newstate]);
89 }
90
91 static void
92 FsmExpireTimer(struct FsmTimer *ft)
93 {
94 #if FSM_TIMER_DEBUG
95 if (ft->fi->debug)
96 ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
97 #endif
98 FsmEvent(ft->fi, ft->event, ft->arg);
99 }
100
101 void
102 FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
103 {
104 ft->fi = fi;
105 ft->tl.function = (void *) FsmExpireTimer;
106 ft->tl.data = (long) ft;
107 #if FSM_TIMER_DEBUG
108 if (ft->fi->debug)
109 ft->fi->printdebug(ft->fi, "FsmInitTimer %lx", (long) ft);
110 #endif
111 init_timer(&ft->tl);
112 }
113
114 void
115 FsmDelTimer(struct FsmTimer *ft, int where)
116 {
117 #if FSM_TIMER_DEBUG
118 if (ft->fi->debug)
119 ft->fi->printdebug(ft->fi, "FsmDelTimer %lx %d", (long) ft, where);
120 #endif
121 del_timer(&ft->tl);
122 }
123
124 int
125 FsmAddTimer(struct FsmTimer *ft,
126 int millisec, int event, void *arg, int where)
127 {
128
129 #if FSM_TIMER_DEBUG
130 if (ft->fi->debug)
131 ft->fi->printdebug(ft->fi, "FsmAddTimer %lx %d %d",
132 (long) ft, millisec, where);
133 #endif
134
135 if (timer_pending(&ft->tl)) {
136 printk(KERN_WARNING "FsmAddTimer: timer already active!\n");
137 ft->fi->printdebug(ft->fi, "FsmAddTimer already active!");
138 return -1;
139 }
140 init_timer(&ft->tl);
141 ft->event = event;
142 ft->arg = arg;
143 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
144 add_timer(&ft->tl);
145 return 0;
146 }
147
148 void
149 FsmRestartTimer(struct FsmTimer *ft,
150 int millisec, int event, void *arg, int where)
151 {
152
153 #if FSM_TIMER_DEBUG
154 if (ft->fi->debug)
155 ft->fi->printdebug(ft->fi, "FsmRestartTimer %lx %d %d",
156 (long) ft, millisec, where);
157 #endif
158
159 if (timer_pending(&ft->tl))
160 del_timer(&ft->tl);
161 init_timer(&ft->tl);
162 ft->event = event;
163 ft->arg = arg;
164 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
165 add_timer(&ft->tl);
166 }
167