/* *	DM-BB driver */#include "../h/param.h"#include "../h/tty.h"#include "../h/conf.h"#define	DMADDR	((struct device *)0170500)struct	tty dh11[];int	ndh11;		/* Set by dh.c to number of lines */#define	DONE	0200#define	SCENABL	040#define	CLSCAN	01000#define	TURNON	03	/* CD lead, line enable */#define	SECX	010	/* secondary xmit */#define	RQS	04	/* request to send */#define	TURNOFF	1	/* line enable only */#define	CARRIER	0100#define	CLS	040	/* clear to send */#define	SECR	020	/* secondary receive */struct device{	int	dmcsr;	int	dmlstat;	int	junk[2];};#define	B1200	9#define	B300	7/* * Turn on the line associated with the (DH) device dev. */dmopen(dev){	register struct tty *tp;	register struct device *addr;	register d;	d = minor(dev);	tp = &dh11[d];	addr = DMADDR;	addr += d>>4;	spl5();	addr->dmcsr = d&017;	addr->dmlstat = TURNON;	if (addr->dmlstat&CARRIER) {		tp->t_state |= CARR_ON;	}	addr->dmcsr = IENABLE|SCENABL;	while ((tp->t_state&CARR_ON)==0)		sleep((caddr_t)&tp->t_rawq, TTIPRI);	addr->dmcsr = d&017;	if (addr->dmlstat&SECR) {		tp->t_ispeed = B1200;		tp->t_ospeed = B1200;		dhparam(dev);	}	addr->dmcsr = IENABLE|SCENABL;	spl0();}/* * Dump control bits into the DM registers. */dmctl(dev, bits){	register struct device *addr;	register d, s;	d = minor(dev);	addr = DMADDR;	addr += d>>4;	s = spl5();	addr->dmcsr = d&017;	addr->dmlstat = bits;	addr->dmcsr = IENABLE|SCENABL;	splx(s);}/* * DM11 interrupt. * Mainly, deal with carrier transitions. */dmint(dev){	register struct tty *tp;	register struct device *addr;	register d;	d = minor(dev);	addr = DMADDR;	addr += d;	if (addr->dmcsr&DONE) {		tp = &dh11[(d<<4)+(addr->dmcsr&017)];		if (tp < &dh11[ndh11]) {			wakeup((caddr_t)&tp->t_rawq);			if ((addr->dmlstat&CARRIER)==0) {				if ((tp->t_state&WOPEN)==0) {					signal(tp->t_pgrp, SIGHUP);					addr->dmlstat = 0;					flushtty(tp);				}				tp->t_state &= ~CARR_ON;			} else {				tp->t_state |= CARR_ON;			}		}		addr->dmcsr = IENABLE|SCENABL;	}}