From a2c68c62dba7acc1de5dd6a6141484d9c12844fe Mon Sep 17 00:00:00 2001
From: phk <phk@FreeBSD.org>
Date: Sat, 25 Sep 1999 16:21:39 +0000
Subject: This patch clears the way for removing a number of tty related fields
 in struct cdevsw:

        d_stop          moved to struct tty.
        d_reset         already unused.
        d_devtotty      linkage now provided by dev_t->si_tty.

These fields will be removed from struct cdevsw together with
d_params and d_maxio Real Soon Now.

The changes in this patch consist of:

        initialize dev->si_tty in *_open()
        initialize tty->t_stop
        remove devtotty functions
        rename ttpoll to ttypoll
        a few adjustments to these changes in the generic code
        a bump of __FreeBSD_version
        add a couple of FreeBSD tags
---
 sys/isa/sio.c | 30 +++++++-----------------------
 1 file changed, 7 insertions(+), 23 deletions(-)

(limited to 'sys/isa/sio.c')

diff --git a/sys/isa/sio.c b/sys/isa/sio.c
index 0e9dcad..28c54db 100644
--- a/sys/isa/sio.c
+++ b/sys/isa/sio.c
@@ -307,6 +307,7 @@ static	int	sioprobe	__P((device_t dev));
 static	void	siosettimeout	__P((void));
 static	int	siosetwater	__P((struct com_s *com, speed_t speed));
 static	void	comstart	__P((struct tty *tp));
+static	void	comstop		__P((struct tty *tp, int rw));
 static	timeout_t comwakeup;
 static	void	disc_optim	__P((struct tty	*tp, struct termios *t,
 				     struct com_s *com));
@@ -338,8 +339,6 @@ static	d_close_t	sioclose;
 static	d_read_t	sioread;
 static	d_write_t	siowrite;
 static	d_ioctl_t	sioioctl;
-static	d_stop_t	siostop;
-static	d_devtotty_t	siodevtotty;
 
 #define	CDEV_MAJOR	28
 static struct cdevsw sio_cdevsw = {
@@ -348,10 +347,10 @@ static struct cdevsw sio_cdevsw = {
 	/* read */	sioread,
 	/* write */	siowrite,
 	/* ioctl */	sioioctl,
-	/* stop */	siostop,
+	/* stop */	nostop,
 	/* reset */	noreset,
-	/* devtotty */	siodevtotty,
-	/* poll */	ttpoll,
+	/* devtotty */	nodevtotty,
+	/* poll */	ttypoll,
 	/* mmap */	nommap,
 	/* strategy */	nostrategy,
 	/* name */	driver_name,
@@ -1210,6 +1209,7 @@ open_top:
 		 */
 		tp->t_oproc = comstart;
 		tp->t_param = comparam;
+		tp->t_stop = comstop;
 		tp->t_dev = dev;
 		tp->t_termios = mynor & CALLOUT_MASK
 				? com->it_out : com->it_in;
@@ -1336,7 +1336,7 @@ sioclose(dev, flag, mode, p)
 	s = spltty();
 	(*linesw[tp->t_line].l_close)(tp, flag);
 	disc_optim(tp, &tp->t_termios, com);
-	siostop(tp, FREAD | FWRITE);
+	comstop(tp, FREAD | FWRITE);
 	comhardclose(com);
 	ttyclose(tp);
 	siosettimeout();
@@ -2375,7 +2375,7 @@ comstart(tp)
 }
 
 static void
-siostop(tp, rw)
+comstop(tp, rw)
 	struct tty	*tp;
 	int		rw;
 {
@@ -2415,22 +2415,6 @@ siostop(tp, rw)
 	comstart(tp);
 }
 
-static struct tty *
-siodevtotty(dev)
-	dev_t	dev;
-{
-	int	mynor;
-	int	unit;
-
-	mynor = minor(dev);
-	if (mynor & CONTROL_MASK)
-		return (NULL);
-	unit = MINOR_TO_UNIT(mynor);
-	if ((u_int) unit >= NSIOTOT)
-		return (NULL);
-	return (dev->si_tty);
-}
-
 static int
 commctl(com, bits, how)
 	struct com_s	*com;
-- 
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