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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> | |
475be4d8 | 8 | * |
1da177e4 LT |
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> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
1da177e4 LT |
19 | #include <linux/init.h> |
20 | #include "hisax.h" | |
21 | ||
22 | #define FSM_TIMER_DEBUG 0 | |
23 | ||
24 | int | |
25 | FsmNew(struct Fsm *fsm, struct FsmNode *fnlist, int fncount) | |
26 | { | |
27 | int i; | |
28 | ||
f754e913 | 29 | fsm->jumpmatrix = |
6396bb22 KC |
30 | kzalloc(array3_size(sizeof(FSMFNPTR), fsm->state_count, |
31 | fsm->event_count), | |
32 | GFP_KERNEL); | |
1da177e4 LT |
33 | if (!fsm->jumpmatrix) |
34 | return -ENOMEM; | |
35 | ||
475be4d8 JP |
36 | for (i = 0; i < fncount; i++) |
37 | if ((fnlist[i].state >= fsm->state_count) || (fnlist[i].event >= fsm->event_count)) { | |
1da177e4 | 38 | printk(KERN_ERR "FsmNew Error line %d st(%ld/%ld) ev(%ld/%ld)\n", |
475be4d8 JP |
39 | i, (long)fnlist[i].state, (long)fsm->state_count, |
40 | (long)fnlist[i].event, (long)fsm->event_count); | |
41 | } else | |
1da177e4 | 42 | fsm->jumpmatrix[fsm->state_count * fnlist[i].event + |
475be4d8 | 43 | fnlist[i].state] = (FSMFNPTR)fnlist[i].routine; |
1da177e4 LT |
44 | return 0; |
45 | } | |
46 | ||
47 | void | |
48 | FsmFree(struct Fsm *fsm) | |
49 | { | |
50 | kfree((void *) fsm->jumpmatrix); | |
51 | } | |
52 | ||
53 | int | |
54 | FsmEvent(struct FsmInst *fi, int event, void *arg) | |
55 | { | |
56 | FSMFNPTR r; | |
57 | ||
475be4d8 | 58 | if ((fi->state >= fi->fsm->state_count) || (event >= fi->fsm->event_count)) { |
1da177e4 | 59 | printk(KERN_ERR "FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n", |
475be4d8 JP |
60 | (long)fi->state, (long)fi->fsm->state_count, event, (long)fi->fsm->event_count); |
61 | return (1); | |
1da177e4 LT |
62 | } |
63 | r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state]; | |
64 | if (r) { | |
65 | if (fi->debug) | |
66 | fi->printdebug(fi, "State %s Event %s", | |
475be4d8 JP |
67 | fi->fsm->strState[fi->state], |
68 | fi->fsm->strEvent[event]); | |
1da177e4 LT |
69 | r(fi, event, arg); |
70 | return (0); | |
71 | } else { | |
72 | if (fi->debug) | |
73 | fi->printdebug(fi, "State %s Event %s no routine", | |
475be4d8 JP |
74 | fi->fsm->strState[fi->state], |
75 | fi->fsm->strEvent[event]); | |
1da177e4 LT |
76 | return (!0); |
77 | } | |
78 | } | |
79 | ||
80 | void | |
81 | FsmChangeState(struct FsmInst *fi, int newstate) | |
82 | { | |
83 | fi->state = newstate; | |
84 | if (fi->debug) | |
85 | fi->printdebug(fi, "ChangeState %s", | |
475be4d8 | 86 | fi->fsm->strState[newstate]); |
1da177e4 LT |
87 | } |
88 | ||
89 | static void | |
5e8b824d | 90 | FsmExpireTimer(struct timer_list *t) |
1da177e4 | 91 | { |
5e8b824d | 92 | struct FsmTimer *ft = from_timer(ft, t, tl); |
1da177e4 LT |
93 | #if FSM_TIMER_DEBUG |
94 | if (ft->fi->debug) | |
95 | ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft); | |
96 | #endif | |
97 | FsmEvent(ft->fi, ft->event, ft->arg); | |
98 | } | |
99 | ||
100 | void | |
101 | FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft) | |
102 | { | |
103 | ft->fi = fi; | |
1da177e4 LT |
104 | #if FSM_TIMER_DEBUG |
105 | if (ft->fi->debug) | |
106 | ft->fi->printdebug(ft->fi, "FsmInitTimer %lx", (long) ft); | |
107 | #endif | |
5e8b824d | 108 | timer_setup(&ft->tl, FsmExpireTimer, 0); |
1da177e4 LT |
109 | } |
110 | ||
111 | void | |
112 | FsmDelTimer(struct FsmTimer *ft, int where) | |
113 | { | |
114 | #if FSM_TIMER_DEBUG | |
115 | if (ft->fi->debug) | |
116 | ft->fi->printdebug(ft->fi, "FsmDelTimer %lx %d", (long) ft, where); | |
117 | #endif | |
118 | del_timer(&ft->tl); | |
119 | } | |
120 | ||
121 | int | |
122 | FsmAddTimer(struct FsmTimer *ft, | |
123 | int millisec, int event, void *arg, int where) | |
124 | { | |
125 | ||
126 | #if FSM_TIMER_DEBUG | |
127 | if (ft->fi->debug) | |
128 | ft->fi->printdebug(ft->fi, "FsmAddTimer %lx %d %d", | |
475be4d8 | 129 | (long) ft, millisec, where); |
1da177e4 LT |
130 | #endif |
131 | ||
132 | if (timer_pending(&ft->tl)) { | |
133 | printk(KERN_WARNING "FsmAddTimer: timer already active!\n"); | |
134 | ft->fi->printdebug(ft->fi, "FsmAddTimer already active!"); | |
135 | return -1; | |
136 | } | |
1da177e4 LT |
137 | ft->event = event; |
138 | ft->arg = arg; | |
139 | ft->tl.expires = jiffies + (millisec * HZ) / 1000; | |
140 | add_timer(&ft->tl); | |
141 | return 0; | |
142 | } | |
143 | ||
144 | void | |
145 | FsmRestartTimer(struct FsmTimer *ft, | |
475be4d8 | 146 | int millisec, int event, void *arg, int where) |
1da177e4 LT |
147 | { |
148 | ||
149 | #if FSM_TIMER_DEBUG | |
150 | if (ft->fi->debug) | |
151 | ft->fi->printdebug(ft->fi, "FsmRestartTimer %lx %d %d", | |
475be4d8 | 152 | (long) ft, millisec, where); |
1da177e4 LT |
153 | #endif |
154 | ||
155 | if (timer_pending(&ft->tl)) | |
156 | del_timer(&ft->tl); | |
1da177e4 LT |
157 | ft->event = event; |
158 | ft->arg = arg; | |
159 | ft->tl.expires = jiffies + (millisec * HZ) / 1000; | |
160 | add_timer(&ft->tl); | |
161 | } |