static void
uartclose(Chan *c)
{
Uart *p;
if(c->qid.type & QTDIR)
return;
if((c->flag & COPEN) == 0)
return;
switch(NETTYPE(c->qid.path)){
case Ndataqid:
case Nctlqid:
p = uart[NETID(c->qid.path)];
qlock(p);
if(--(p->opens) == 0){
qclose(p->iq);
ilock(&p->rlock);
p->ir = p->iw = p->istage;
iunlock(&p->rlock);
/*
*/
qhangup(p->oq, nil);
if(!waserror()){
uartdrainoutput(p);
poperror();
}
qclose(p->oq);
uartdisable(p);
p->dcd = p->dsr = p->dohup = 0;
}
qunlock(p);
break;
}
}
int
uartctl(Uart *p, char *cmd)
{
char *f[16];
int i, n, nf;
nf = tokenize(cmd, f, nelem(f));
for(i = 0; i < nf; i++){
if(strncmp(f[i], "break", 5) == 0){
(*p->phys->dobreak)(p, 0);
continue;
}
n = atoi(f[i]+1);
switch(*f[i]){
case 'B':
case 'b':
uartdrainoutput(p);
if((*p->phys->baud)(p, n) < 0)
return -1;
break;
case 'C':
case 'c':
p->hup_dcd = n;
break;
case 'D':
case 'd':
uartdrainoutput(p);
(*p->phys->dtr)(p, n);
break;
case 'E':
case 'e':
p->hup_dsr = n;
break;
case 'F':
case 'f':
if(p->oq != nil)
qflush(p->oq);
break;
case 'H':
case 'h':
if(p->iq != nil)
qhangup(p->iq, 0);
if(p->oq != nil)
qhangup(p->oq, 0);
break;
case 'I':
case 'i':
uartdrainoutput(p);
(*p->phys->fifo)(p, n);
break;
case 'K':
case 'k':
uartdrainoutput(p);
(*p->phys->dobreak)(p, n);
break;
case 'L':
case 'l':
uartdrainoutput(p);
if((*p->phys->bits)(p, n) < 0)
return -1;
break;
case 'M':
case 'm':
uartdrainoutput(p);
(*p->phys->modemctl)(p, n);
break;
case 'N':
case 'n':
if(p->oq != nil)
qnoblock(p->oq, n);
break;
case 'P':
case 'p':
uartdrainoutput(p);
if((*p->phys->parity)(p, *(f[i]+1)) < 0)
return -1;
break;
case 'Q':
case 'q':
if(p->iq != nil)
qsetlimit(p->iq, n);
if(p->oq != nil)
qsetlimit(p->oq, n);
break;
case 'R':
case 'r':
uartdrainoutput(p);
(*p->phys->rts)(p, n);
break;
case 'S':
case 's':
uartdrainoutput(p);
if((*p->phys->stop)(p, n) < 0)
return -1;
break;
case 'W':
case 'w':
if(uarttimer == nil || n < 1)
return -1;
uarttimer->tns = (int64_t)n * 100000LL;
break;
case 'X':
case 'x':
if(p->enabled){
ilock(&p->tlock);
p->xonoff = n;
iunlock(&p->tlock);
}
break;
}
}
return 0;
}
