diff options
Diffstat (limited to 'kernel/drivers/isdn/hisax/fsm.c')
| -rw-r--r-- | kernel/drivers/isdn/hisax/fsm.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/kernel/drivers/isdn/hisax/fsm.c b/kernel/drivers/isdn/hisax/fsm.c new file mode 100644 index 000000000..c7a94713e --- /dev/null +++ b/kernel/drivers/isdn/hisax/fsm.c @@ -0,0 +1,162 @@ +/* $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/slab.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 = + 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); +} |