freebsd-dev/sys/gnu/isdn/iitty.c
Gary Palmer c23670e294 Clean up -Wunused warnings.
Reviewed by:		bde
1996-06-12 05:11:41 +00:00

363 lines
7.1 KiB
C

/* @(#)$Id: iitty.c,v 1.21 1996/04/02 22:06:23 gpalmer Exp $
*******************************************************************************
* II - Version 0.1 $Revision: 1.21 $ $State: Exp $
*
* Copyright 1994 Dietmar Friede
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* jkr@saarlink.de or jkrause@guug.de
*
*******************************************************************************
*/
#include "ity.h"
#if NITY > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/types.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#include "gnu/isdn/isdn_ioctl.h"
static d_open_t ityopen;
static d_close_t ityclose;
static d_read_t ityread;
static d_write_t itywrite;
static d_ioctl_t ityioctl;
static d_stop_t itystop;
static d_devtotty_t itydevtotty;
#define CDEV_MAJOR 56
static struct cdevsw ity_cdevsw =
{ ityopen, ityclose, ityread, itywrite, /*56*/
ityioctl, itystop, noreset, itydevtotty,/* ity */
ttselect, nommap, NULL, "ity", NULL, -1 };
static int ityparam __P((struct tty *tp, struct termios *t));
static void itystart __P((struct tty *tp));
static int itydefaultrate = 64000;
static short ity_addr[NITY];
static struct tty ity_tty[NITY];
static int applnr[NITY];
static int next_if= 0;
#ifdef DEVFS
void *devfs_token[NITY];
static void *devfs_token_out[NITY];
#endif
#define UNIT(x) (minor(x)&0x3f)
#define OUTBOUND(x) ((minor(x)&0x80)==0x80)
int
ityattach(int ap)
{
if(next_if >= NITY)
return(-1);
applnr[next_if]= ap;
#ifdef DEVFS
devfs_token[next_if] =
devfs_add_devswf(&ity_cdevsw, next_if, DV_CHR, 0, 0,
0600, "isdn/ity%d", next_if);
devfs_token_out[next_if] =
devfs_add_devswf(&ity_cdevsw,(next_if | 0x80), DV_CHR, 0, 0,
0600, "isdn/Oity%d", next_if);
#endif
return(next_if++);
}
/* ARGSUSED */
static int
ityopen(dev_t dev, int flag, int mode, struct proc * p)
{
register struct tty *tp;
register int unit;
int error = 0;
unit = UNIT(dev);
if (unit >= next_if)
return (ENXIO);
tp = &ity_tty[unit];
tp->t_oproc = itystart;
tp->t_param = ityparam;
tp->t_dev = dev;
if ((tp->t_state & TS_ISOPEN) == 0)
{
ttychars(tp);
if (tp->t_ispeed == 0)
{
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_cflag = TTYDEF_CFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = itydefaultrate;
}
ityparam(tp, &tp->t_termios);
ttsetwater(tp);
} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0)
return (EBUSY);
(void) spltty();
if (OUTBOUND(dev)) {
/*
* XXX should call l_modem() here and not meddle with CLOCAL,
* but itystart() wants TS_CARR_ON to give the true carrier.
*/
tp->t_cflag |= CLOCAL;
tp->t_state |= TS_CONNECTED;
}
while ((flag & O_NONBLOCK) == 0 && (tp->t_cflag & CLOCAL) == 0 &&
(tp->t_state & TS_CARR_ON) == 0)
{
error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "iidcd", 0);
if (error)
break;
}
(void) spl0();
if (error == 0)
error = (*linesw[tp->t_line].l_open) (dev, tp);
return (error);
}
/* ARGSUSED */
static int
ityclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
register struct tty *tp;
register ity;
register int unit;
unit = UNIT(dev);
ity = ity_addr[unit];
if(tp = &ity_tty[unit])
(*linesw[tp->t_line].l_close) (tp, flag);
ttyclose(tp);
isdn_disconnect(applnr[unit],0);
return (0);
}
static int
ityread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
register struct tty *tp = &ity_tty[UNIT(dev)];
return ((*linesw[tp->t_line].l_read) (tp, uio, flag));
}
static int
itywrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
int unit = UNIT(dev);
register struct tty *tp = &ity_tty[unit];
return ((*linesw[tp->t_line].l_write) (tp, uio, flag));
}
int
ity_input(int no, int len, char *buf, int dir)
{
register struct tty *tp = &ity_tty[no];
int i;
if (tp->t_state & TS_ISOPEN)
for(i= 0; i<len; i++)
(*linesw[tp->t_line].l_rint)(buf[i], tp);
else len= 0;
return(len);
}
static void
itystart(struct tty *tp)
{
int s, unit;
unit = UNIT(tp->t_dev);
s = splhigh();
if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP))
{
splx(s);
return;
}
ttwwakeup(tp);
if (tp->t_outq.c_cc)
{
if(OUTBOUND(tp->t_dev) && (tp->t_cflag & CLOCAL) &&
((tp->t_state & TS_CARR_ON) == 0))
isdn_msg(applnr[unit]);
else isdn_output(applnr[unit]);
tp->t_state |= TS_BUSY;
}
splx(s);
}
int
ity_out(int no, char *buf, int len)
{
struct tty *tp = &ity_tty[no];
int i;
if(tp == NULL)
return(0);
if(tp->t_outq.c_cc)
{
for (i = 0; i < len && tp->t_outq.c_cc; ++i)
buf[i]= getc(&tp->t_outq);
return(i);
}
tp->t_state &=~ (TS_BUSY|TS_FLUSH);
if (tp->t_line)
(*linesw[tp->t_line].l_start)(tp);
else
itystart(tp);
return(0);
}
void
ity_connect(int no)
{
struct tty *tp = &ity_tty[no];
if(tp == NULL)
return;
if(OUTBOUND(tp->t_dev)) tp->t_cflag &= ~CLOCAL;
(*linesw[tp->t_line].l_modem) (tp, 1);
tp->t_state &=~ (TS_BUSY|TS_FLUSH);
if (tp->t_line)
(*linesw[tp->t_line].l_start)(tp);
else
itystart(tp);
}
void
ity_disconnect(int no)
{
struct tty *tp = &ity_tty[no];
if(tp) (*linesw[tp->t_line].l_modem) (tp, 0);
}
static int
ityioctl(dev, cmd, data, flag,p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
register struct tty *tp;
register int unit = UNIT(dev);
register int error;
tp = &ity_tty[unit];
error = (*linesw[tp->t_line].l_ioctl) (tp, cmd, data, flag,p);
if (error >= 0)
return (error);
error = ttioctl(tp, cmd, data, flag);
if (error >= 0)
return (error);
switch (cmd)
{
default:
return (ENOTTY);
}
return (0);
}
static int
ityparam(tp, t)
register struct tty *tp;
register struct termios *t;
{
register int cflag = t->c_cflag;
int unit = UNIT(tp->t_dev);
int ospeed = t->c_ospeed;
/* check requested parameters */
if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed))
return (EINVAL);
/* and copy to tty */
tp->t_ispeed = t->c_ispeed;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = cflag;
if (ospeed == 0)
{
isdn_disconnect(applnr[unit],0);
return (0);
}
return (0);
}
/*
* Stop output on a line.
*/
/* ARGSUSED */
static void
itystop(struct tty *tp, int flag)
{
register int s;
s = splhigh();
if (tp->t_state & TS_BUSY)
{
if ((tp->t_state & TS_TTSTOP) == 0)
tp->t_state |= TS_FLUSH;
}
splx(s);
}
static struct tty *
itydevtotty(dev_t dev)
{
register int unit = UNIT(dev);
if (unit >= next_if)
return (NULL);
return (&ity_tty[unit]);
}
static ity_devsw_installed = 0;
static void
ity_drvinit(void *unused)
{
dev_t dev;
if( ! ity_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&ity_cdevsw, NULL);
ity_devsw_installed = 1;
}
}
SYSINIT(itydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ity_drvinit,NULL)
#endif