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