patch-2.3.99-pre7 linux/drivers/char/rio/riotty.c

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diff -u --recursive --new-file v2.3.99-pre6/linux/drivers/char/rio/riotty.c linux/drivers/char/rio/riotty.c
@@ -0,0 +1,1321 @@
+/*
+** -----------------------------------------------------------------------------
+**
+**  Perle Specialix driver for Linux
+**  Ported from existing RIO Driver for SCO sources.
+ *
+ *  (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
+ *
+ *      This program is free software; you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation; either version 2 of the License, or
+ *      (at your option) any later version.
+ *
+ *      This program is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *
+ *      You should have received a copy of the GNU General Public License
+ *      along with this program; if not, write to the Free Software
+ *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+**
+**	Module		: riotty.c
+**	SID		: 1.3
+**	Last Modified	: 11/6/98 10:33:47
+**	Retrieved	: 11/6/98 10:33:50
+**
+**  ident @(#)riotty.c	1.3
+**
+** -----------------------------------------------------------------------------
+*/
+#ifdef SCCS_LABELS
+static char *_riotty_c_sccs_ = "@(#)riotty.c	1.3";
+#endif
+
+
+#define __EXPLICIT_DEF_H__
+
+#define __NO_VERSION__
+#include <linux/module.h>
+#include <linux/malloc.h>
+#include <linux/errno.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/string.h>
+#include <asm/semaphore.h>
+#include <asm/uaccess.h>
+
+#include <linux/termios.h>
+
+#include <linux/serial.h>
+
+#include <linux/compatmac.h>
+#include <linux/generic_serial.h>
+
+
+#include "linux_compat.h"
+#include "rio_linux.h"
+#include "typdef.h"
+#include "pkt.h"
+#include "daemon.h"
+#include "rio.h"
+#include "riospace.h"
+#include "top.h"
+#include "cmdpkt.h"
+#include "map.h"
+#include "riotypes.h"
+#include "rup.h"
+#include "port.h"
+#include "riodrvr.h"
+#include "rioinfo.h"
+#include "func.h"
+#include "errors.h"
+#include "pci.h"
+
+#include "parmmap.h"
+#include "unixrup.h"
+#include "board.h"
+#include "host.h"
+#include "error.h"
+#include "phb.h"
+#include "link.h"
+#include "cmdblk.h"
+#include "route.h"
+#include "control.h"
+#include "cirrus.h"
+#include "rioioctl.h"
+#include "param.h"
+#include "list.h"
+#include "sam.h"
+
+
+#if 0
+static void ttyseth_pv(struct Port *, struct ttystatics *, 
+				struct termios *sg, int);
+#endif
+
+static void RIOClearUp(struct Port *PortP);
+static int RIOShortCommand(struct rio_info *p, struct Port *PortP, 
+			   int command, int len, int arg);
+
+
+extern int	conv_vb[];	/* now defined in ttymgr.c */
+extern int	conv_bv[];	/* now defined in ttymgr.c */
+ 
+/*
+** 16.09.1998 ARG - Fix to build riotty.k.o for Modular Kernel Support
+**
+** ep.def.h is necessary for Modular Kernel Support
+** DO NOT place any kernel 'extern's after this line
+** or this source file will not build riotty.k.o
+*/
+#ifdef uLYNX
+#include <ep.def.h>
+#endif
+
+#ifdef NEED_THIS2
+static struct old_sgttyb 
+default_sg = 
+{ 
+	B19200, B19200,				/* input and output speed */ 
+	'H' - '@',					/* erase char */ 
+	-1,							/* 2nd erase char */ 
+	'U' - '@',					/* kill char */ 
+	ECHO | CRMOD,				/* mode */ 
+	'C' - '@',					/* interrupt character */ 
+	'\\' - '@',					/* quit char */ 
+	'Q' - '@',					/* start char */
+	'S' - '@',					/* stop char */ 
+	'D' - '@',					/* EOF */
+	-1,							/* brk */
+	(LCRTBS | LCRTERA | LCRTKIL | LCTLECH),	/* local mode word */ 
+	'Z' - '@',					/* process stop */
+	'Y' - '@',					/* delayed stop */
+	'R' - '@',					/* reprint line */ 
+	'O' - '@',					/* flush output */
+	'W' - '@',					/* word erase */
+	'V' - '@'					/* literal next char */
+};
+#endif
+
+
+extern struct rio_info *p;
+extern void rio_inc_mod_count (void);
+
+
+int
+riotopen(struct tty_struct * tty, struct file * filp)
+{
+	register uint SysPort;
+	int Modem;
+	int repeat_this = 250;
+	struct Port *PortP;		 /* pointer to the port structure */
+	unsigned long flags;
+	int retval = 0;
+
+	SysPort = rio_minor (tty->device);
+	Modem   = rio_ismodem (tty->device);
+
+	if ( p->RIOFailed ) {
+		rio_dprint(RIO_DEBUG_TTY, ("System initialisation failed\n"));
+		pseterr(ENXIO);
+		return 0;
+	}
+
+	rio_dprint(RIO_DEBUG_TTY, ("port open SysPort %d (%s) (mapped:%d)\n",
+	       SysPort,  Modem ? "Modem" : "tty",
+				   p->RIOPortp[SysPort]->Mapped  ) );
+
+	/*
+	** Validate that we have received a legitimate request.
+	** Currently, just check that we are opening a port on
+	** a host card that actually exists, and that the port
+	** has been mapped onto a host.
+	*/
+	if (SysPort >= RIO_PORTS) {	/* out of range ? */
+		rio_dprint(RIO_DEBUG_TTY, ("Illegal port number %d\n",SysPort));
+		pseterr(ENXIO);
+		return 0;
+	}
+
+	/*
+	** Grab pointer to the port stucture
+	*/
+	PortP = p->RIOPortp[SysPort];	/* Get control struc */
+
+	if ( !PortP->Mapped ) {	/* we aren't mapped yet! */
+		/*
+		** The system doesn't know which RTA this port
+		** corresponds to.
+		*/
+		rio_dprint(RIO_DEBUG_TTY, ("port not mapped into system\n"));
+		pseterr(ENXIO);
+		return 0;
+	}
+
+	tty->driver_data = PortP;
+
+	PortP->gs.tty = tty;
+	PortP->gs.count++;
+	rio_dprint(RIO_DEBUG_TTY, ("%d bytes in tx buffer\n",
+				   PortP->gs.xmit_cnt));
+	gs_init_port (&PortP->gs);
+
+	/*
+	** If the host hasn't been booted yet, then 
+	** fail
+	*/
+	if ( (PortP->HostP->Flags & RUN_STATE) != RC_RUNNING ) {
+		rio_dprint(RIO_DEBUG_TTY, ("Host not running\n"));
+		pseterr(ENXIO);
+		return 0;
+	}
+
+	/*
+	** If the RTA has not booted yet and the user has choosen to block
+	** until the RTA is present then we must spin here waiting for
+	** the RTA to boot.
+	*/
+#if 0
+	if (!(PortP->HostP->Mapping[PortP->RupNum].Flags & RTA_BOOTED)) {
+		if (PortP->WaitUntilBooted) {
+			rio_dprint(RIO_DEBUG_TTY, ("Waiting for RTA to boot\n"));
+			do {
+				if (RIODelay(PortP, HUNDRED_MS) == RIO_FAIL) {
+					rio_dprint(RIO_DEBUG_TTY, ("RTA EINTR in delay \n"));
+					return -EINTR;
+				}
+				if (repeat_this -- <= 0) {
+					rio_dprint(RIO_DEBUG_TTY, ("Waiting for RTA to boot timeout\n"));
+					RIOPreemptiveCmd(p, PortP, FCLOSE ); 
+					pseterr(EINTR);
+					return -EIO;
+				}
+			} while(!(PortP->HostP->Mapping[PortP->RupNum].Flags & RTA_BOOTED));
+			rio_dprint(RIO_DEBUG_TTY, ("RTA has been booted\n"));
+		} else {
+			rio_dprint(RIO_DEBUG_TTY, ("RTA never booted\n"));
+			pseterr(ENXIO);
+			return 0;
+		}
+	}
+#else
+	/* I find the above code a bit hairy. I find the below code
+           easier to read and shorter. Now, if it works too that would
+	   be great... -- REW 
+	*/
+	rio_dprint(RIO_DEBUG_TTY, ("Checking if RTA has booted... \n"));
+	while (!(PortP->HostP->Mapping[PortP->RupNum].Flags & RTA_BOOTED)) {
+	  if (!PortP->WaitUntilBooted) {
+	    rio_dprint(RIO_DEBUG_TTY, ("RTA never booted\n"));
+	    return -ENXIO;
+	  }
+
+	  /* Under Linux you'd normally use a wait instead of this
+	     busy-waiting. I'll stick with the old implementation for
+	     now. --REW 
+	  */
+	  if (RIODelay(PortP, HUNDRED_MS) == RIO_FAIL) {
+	    rio_dprint(RIO_DEBUG_TTY, ("RTA_wait_for_boot: EINTR in delay \n"));
+	    return -EINTR;
+	  }
+	  if (repeat_this -- <= 0) {
+	    rio_dprint(RIO_DEBUG_TTY, ("Waiting for RTA to boot timeout\n"));
+	    return -EIO;
+	  }
+	}
+	rio_dprint(RIO_DEBUG_TTY, ("RTA has been booted\n"));
+#endif
+#if 0
+	tp =  PortP->TtyP;		/* get tty struct */
+#endif
+	rio_spin_lock_irqsave(&PortP->portSem, flags);
+	if ( p->RIOHalted ) {
+		goto bombout;
+	}
+#if 0
+	retval = gs_init_port(&PortP->gs);
+	if (retval)
+	  return retval;
+#endif
+
+	/*
+	** If the port is in the final throws of being closed,
+	** we should wait here (politely), waiting
+	** for it to finish, so that it doesn't close us!
+	*/
+	while ( (PortP->State & RIO_CLOSING) && !p->RIOHalted ) {
+		rio_dprint(RIO_DEBUG_TTY, ("Waiting for RIO_CLOSING to go away\n"));
+		if (repeat_this -- <= 0) {
+			rio_dprint(RIO_DEBUG_TTY, ("Waiting for not idle closed broken by signal\n"));
+			RIOPreemptiveCmd(p, PortP, FCLOSE ); 
+			retval = -EINTR;
+			goto bombout;
+		}
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		if (RIODelay(PortP, HUNDRED_MS) == RIO_FAIL) {
+			rio_spin_lock_irqsave(&PortP->portSem, flags); 
+			retval = -EINTR;
+			goto bombout;
+		}
+		rio_spin_lock_irqsave(&PortP->portSem, flags); 
+	}
+
+	if ( !PortP->Mapped ) {
+		rio_dprint(RIO_DEBUG_TTY, ("Port unmapped while closing!\n"));
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		retval = -ENXIO;
+		return retval;
+	}
+
+	if ( p->RIOHalted ) {
+		goto bombout;
+	}
+
+/*
+** 15.10.1998 ARG - ESIL 0761 part fix
+** RIO has it's own CTSFLOW and RTSFLOW flags in 'Config' in the port structure,
+** we need to make sure that the flags are clear when the port is opened.
+*/
+	/* Uh? Suppose I turn these on and then another process opens
+	   the port again? The flags get cleared! Not good. -- REW */
+	if ( !(PortP->State & (RIO_LOPEN | RIO_MOPEN)) ) {
+		PortP->Config &= ~(RIO_CTSFLOW|RIO_RTSFLOW);
+	}
+
+	if (!(PortP->firstOpen)) {	/* First time ? */
+		rio_dprint(RIO_DEBUG_TTY, ("First open for this port\n"));
+		rio_inc_mod_count ();
+
+		PortP->firstOpen++;
+		PortP->CookMode = 0; /* XXX RIOCookMode(tp); */
+		PortP->InUse = NOT_INUSE;
+
+		/* Tentative fix for bug PR27. Didn't work. */
+		/* PortP->gs.xmit_cnt = 0; */
+
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+#ifdef NEED_THIS
+		ttyseth(PortP, tp, (struct old_sgttyb *)&default_sg);
+#endif
+
+		/* Someone explain to me why this delay/config is
+                   here. If I read the docs correctly the "open"
+                   command piggybacks the parameters immediately. 
+		   -- REW */
+		RIOParam(PortP,OPEN,Modem,OK_TO_SLEEP);		/* Open the port */
+#if 0
+		/* This delay of 1 second was annoying. I removed it. -- REW */
+		RIODelay(PortP, HUNDRED_MS*10);
+		RIOParam(PortP,CONFIG,Modem,OK_TO_SLEEP);	/* Config the port */
+#endif
+		rio_spin_lock_irqsave(&PortP->portSem, flags);
+
+		/*
+		** wait for the port to be not closed.
+		*/
+		while ( !(PortP->PortState & PORT_ISOPEN) && !p->RIOHalted ) {
+			rio_dprint(RIO_DEBUG_TTY, ("Waiting for PORT_ISOPEN-currently %x\n",PortP->PortState));
+/*
+** 15.10.1998 ARG - ESIL 0759
+** (Part) fix for port being trashed when opened whilst RTA "disconnected"
+** Take out the limited wait - now wait for ever or until user
+** bangs us out.
+**
+			if (repeat_this -- <= 0) {
+				rio_dprint(RIO_DEBUG_TTY, ("Waiting for open to finish timed out.\n"));
+				RIOPreemptiveCmd(p, PortP, FCLOSE ); 
+				rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+				return -EINTR;
+			}
+**
+*/
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			if (RIODelay(PortP, HUNDRED_MS) == RIO_FAIL) {
+				rio_dprint(RIO_DEBUG_TTY, ("Waiting for open to finish broken by signal\n"));
+				RIOPreemptiveCmd(p, PortP, FCLOSE );
+				return -EINTR;
+			}
+			rio_spin_lock_irqsave(&PortP->portSem, flags);
+		}
+
+		if ( p->RIOHalted ) {
+		  retval = -EIO;
+bombout:
+		  /* 			RIOClearUp( PortP ); */
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return retval;
+		}
+		rio_dprint(RIO_DEBUG_TTY, ("PORT_ISOPEN found\n"));
+	}
+
+#ifdef MODEM_SUPPORT 
+	if (Modem) {
+		rio_dprint(RIO_DEBUG_TTY, ("Modem - test for carrier\n"));
+		/*
+		** ACTION
+		** insert test for carrier here. -- ???
+		** I already see that test here. What's the deal? -- REW
+		*/
+		if ((tp->tm.c_cflag & CLOCAL) || (PortP->ModemState & MSVR1_CD))
+		{
+			rio_dprint(RIO_DEBUG_TTY, (PortP,DBG_OPEN,"open(%d) Modem carr on\n",SysPort));
+			tp->tm.c_state |= CARR_ON;
+			wakeup((caddr_t) &tp->tm.c_canq);
+		}
+		else /* no carrier - wait for DCD */
+		{
+			while (!(tp->tm.c_state&CARR_ON) && 
+			       !(filp->f_flags&O_NONBLOCK) && !p->RIOHalted )
+			{
+				rio_dprint(RIO_DEBUG_TTY, (PortP,DBG_OPEN,"open(%d) sleeping for carr on\n",SysPort));
+				tp->tm.c_state |= WOPEN;
+				PortP->State |= RIO_WOPEN;
+				if ( sleep((caddr_t)&tp->tm.c_canq, TTIPRI|PCATCH))
+				{
+					/*
+					** ACTION: verify that this is a good thing
+					** to do here. -- ???
+					** I think it's OK. -- REW
+					*/
+					rio_dprint(RIO_DEBUG_TTY, ("open(%d) sleeping for carr broken by signal\n",
+					       SysPort));
+					RIOPreemptiveCmd( p, PortP, FCLOSE );
+					tp->tm.c_state &= ~WOPEN;
+					PortP->State &= ~RIO_WOPEN;
+					rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+					return -EINTR;
+				}
+			}
+			PortP->State &= ~RIO_WOPEN;
+		}
+		if ( RIOHalted )
+			goto bombout;
+		PortP->State |= RIO_MOPEN;
+	}
+	else
+#endif
+	{
+		/*
+		** ACTION
+		** Direct line open - force carrier (will probably mean
+		** that sleeping Modem line fubar)
+		*/
+		PortP->State |= RIO_LOPEN;
+	}
+
+	if ( p->RIOHalted ) {
+		goto bombout;
+	}
+
+	rio_dprint(RIO_DEBUG_TTY, ("high level open done\n"));
+
+#ifdef STATS
+	PortP->Stat.OpenCnt++;
+#endif
+	/*
+	** Count opens for port statistics reporting
+	*/
+	if (PortP->statsGather)
+		PortP->opens++;
+
+	rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+	rio_dprint(RIO_DEBUG_TTY, ("Returning from open\n"));
+	return 0;
+}
+
+/*
+** RIOClose the port.
+** The operating system thinks that this is last close for the device.
+** As there are two interfaces to the port (Modem and tty), we need to
+** check that both are closed before we close the device.
+*/ 
+int
+riotclose(void  *ptr)
+{
+#if 0
+	register uint SysPort = dev;
+	struct ttystatics *tp;		/* pointer to our ttystruct */
+#endif
+	struct Port *PortP =ptr;	/* pointer to the port structure */
+	int deleted = 0;
+	int	try = 25;
+	int	repeat_this = 0xff;
+	struct tty_struct * tty;
+	unsigned long flags;
+	int Modem;
+	int rv =0;
+	
+	rio_dprint(RIO_DEBUG_TTY, ("port close SysPort %d\n",PortP->PortNum));
+
+	/* PortP = p->RIOPortp[SysPort]; */
+	rio_dprint(RIO_DEBUG_TTY, ("Port is at address 0x%x\n",(int)PortP));
+	/* tp = PortP->TtyP;*/			/* Get tty */
+	tty = PortP->gs.tty;
+	rio_dprint(RIO_DEBUG_TTY, ("TTY is at address 0x%x\n",(int)tty));
+	Modem = rio_ismodem(tty->device);
+#if 0
+	/* What F.CKING cache? Even then, a higly idle multiprocessor,
+	   system with large caches this won't work . Better find out when 
+	   this doesn't work asap, and fix the cause.  -- REW */
+	
+	RIODelay(PortP, HUNDRED_MS*10);	/* To flush the cache */
+#endif
+	rio_spin_lock_irqsave(&PortP->portSem, flags);
+
+	/*
+	** Setting this flag will make any process trying to open
+	** this port block until we are complete closing it.
+	*/
+	PortP->State |= RIO_CLOSING;
+
+	if ( (PortP->State & RIO_DELETED) ) {
+		rio_dprint(RIO_DEBUG_TTY, ("Close on deleted RTA\n"));
+		deleted = 1;
+	}
+	
+	if ( p->RIOHalted ) {
+		RIOClearUp( PortP );
+		rv = -EIO;
+		goto close_end;
+	}
+
+	rio_dprint(RIO_DEBUG_TTY, ("Clear bits\n"));
+	/*
+	** clear the open bits for this device
+	*/
+	PortP->State &= (Modem ? ~RIO_MOPEN : ~RIO_LOPEN);
+
+	/*
+	** If the device was open as both a Modem and a tty line
+	** then we need to wimp out here, as the port has not really
+	** been finally closed (gee, whizz!) The test here uses the
+	** bit for the OTHER mode of operation, to see if THAT is
+	** still active!
+	*/
+	if ( (PortP->State & (RIO_LOPEN|RIO_MOPEN)) ) {
+		/*
+		** The port is still open for the other task -
+		** return, pretending that we are still active.
+		*/
+		rio_dprint(RIO_DEBUG_TTY, ("Channel %d still open !\n",PortP->PortNum));
+		PortP->State &= ~RIO_CLOSING;
+		if (PortP->firstOpen)
+			PortP->firstOpen--;
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		return -EIO;
+	}
+
+	rio_dprint(RIO_DEBUG_TTY, ("Closing down - everything must go!\n"));
+
+	PortP->State &= ~RIO_DYNOROD;
+
+	/*
+	** This is where we wait for the port
+	** to drain down before closing. Bye-bye....
+	** (We never meant to do this)
+	*/
+	rio_dprint(RIO_DEBUG_TTY, ("Timeout 1 starts\n"));
+
+#if 0
+	if (!deleted)
+	while ( (PortP->InUse != NOT_INUSE) && !p->RIOHalted && 
+		(PortP->TxBufferIn != PortP->TxBufferOut) ) {
+		cprintf("Need to flush the ttyport\n");
+		if (repeat_this -- <= 0) {
+			rv = -EINTR;
+			rio_dprint(RIO_DEBUG_TTY, ("Waiting for not idle closed broken by signal\n"));
+			RIOPreemptiveCmd(p, PortP, FCLOSE ); 
+			goto close_end;
+		}
+		rio_dprint(RIO_DEBUG_TTY, ("Calling timeout to flush in closing\n"));
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		if (RIODelay_ni(PortP, HUNDRED_MS*10) == RIO_FAIL) {
+			rio_dprint(RIO_DEBUG_TTY, ("RTA EINTR in delay \n"));
+			rv = -EINTR;
+			rio_spin_lock_irqsave(&PortP->portSem, flags);
+			goto close_end;
+		}
+		rio_spin_lock_irqsave(&PortP->portSem, flags);
+	}
+#endif
+	PortP->TxBufferIn = PortP->TxBufferOut = 0;
+	repeat_this = 0xff;
+
+	PortP->InUse = 0;
+	if ( (PortP->State & (RIO_LOPEN|RIO_MOPEN)) ) {
+		/*
+		** The port has been re-opened for the other task -
+		** return, pretending that we are still active.
+		*/
+		rio_dprint(RIO_DEBUG_TTY, ("Channel %d re-open!\n", PortP->PortNum));
+		PortP->State &= ~RIO_CLOSING;
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		if (PortP->firstOpen)
+			PortP->firstOpen--;
+		return -EIO;
+	}
+
+	if ( p->RIOHalted ) {
+		RIOClearUp( PortP );
+		goto close_end;
+	}
+
+	
+
+	/* Can't call RIOShortCommand with the port locked. */
+	rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+
+	if (RIOShortCommand(p, PortP, CLOSE, 1, 0) == RIO_FAIL) {
+	  RIOPreemptiveCmd(p, PortP,FCLOSE);
+	  goto close_end;
+	}
+
+	if (!deleted)
+	  while (try && (PortP->PortState & PORT_ISOPEN)) {
+	        try--;
+		if (try == 0) {
+		  rio_dprint(RIO_DEBUG_TTY, ("Run out of tries - force the bugger shut!\n" ));
+		  RIOPreemptiveCmd(p, PortP,FCLOSE);
+		  break;
+		}
+		rio_dprint(RIO_DEBUG_TTY, ("Close: PortState:ISOPEN is %d\n", 
+					   PortP->PortState & PORT_ISOPEN));
+
+		if ( p->RIOHalted ) {
+			RIOClearUp( PortP );
+			goto close_end;
+		}
+		RIODelay_ni(PortP, HUNDRED_MS);
+	}
+	rio_spin_lock_irqsave(&PortP->portSem, flags);
+	rio_dprint(RIO_DEBUG_TTY, ("Close: try was %d on completion\n", try ));
+ 
+	/* RIOPreemptiveCmd(p, PortP, FCLOSE); */
+
+/*
+** 15.10.1998 ARG - ESIL 0761 part fix
+** RIO has it's own CTSFLOW and RTSFLOW flags in 'Config' in the port structure,** we need to make sure that the flags are clear when the port is opened.
+*/
+	PortP->Config &= ~(RIO_CTSFLOW|RIO_RTSFLOW);
+
+
+#ifdef STATS
+	PortP->Stat.CloseCnt++;
+#endif
+	/*
+	** Count opens for port statistics reporting
+	*/
+	if (PortP->statsGather)
+		PortP->closes++;
+
+close_end:
+	/* XXX: Why would a "DELETED" flag be reset here? I'd have
+	   thought that a "deleted" flag means that the port was
+	   permanently gone, but here we can make it reappear by it
+	   being in close during the "deletion".
+	*/
+	PortP->State &= ~(RIO_CLOSING|RIO_DELETED);
+	if (PortP->firstOpen)
+		PortP->firstOpen--;
+	rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+	rio_dprint(RIO_DEBUG_TTY, ("Return from close\n"));
+	return rv;
+}
+
+
+/*
+** decide if we need to use the line discipline.
+** This routine can return one of three values:
+** COOK_RAW if no processing has to be done by the line discipline or the card
+** COOK_WELL if the line discipline must be used to do the processing
+** COOK_MEDIUM if the card can do all the processing necessary.
+*/
+int
+RIOCookMode(struct ttystatics *tp)
+{
+	/*
+	** We cant handle tm.c_mstate != 0 on SCO
+	** We cant handle mapping
+	** We cant handle non-ttwrite line disc.
+	** We cant handle lflag XCASE
+	** We can handle oflag OPOST & (OCRNL, ONLCR, TAB3)
+	*/
+
+#ifdef CHECK
+	CheckTtyP( tp );
+#endif
+	if (!(tp->tm.c_oflag & OPOST))	/* No post processing */
+		return COOK_RAW;	/* Raw mode o/p */
+
+	if ( tp->tm.c_lflag & XCASE )
+		return COOK_WELL;	/* Use line disc */
+
+	if (tp->tm.c_oflag & ~(OPOST | ONLCR | OCRNL | TAB3 ) )
+		return COOK_WELL;	/* Use line disc for strange modes */
+
+	if ( tp->tm.c_oflag == OPOST )	/* If only OPOST is set, do RAW */
+		return COOK_RAW;
+
+	/*
+	** So, we need to output process!
+	*/
+	return COOK_MEDIUM;
+}
+
+
+static void
+RIOClearUp(PortP)
+struct Port *PortP;
+{
+	rio_dprint(RIO_DEBUG_TTY, ("RIOHalted set\n"));
+	PortP->Config = 0;	  /* Direct semaphore */
+	PortP->PortState = 0;
+	PortP->firstOpen = 0;
+	PortP->FlushCmdBodge = 0;
+	PortP->ModemState = PortP->CookMode = 0;
+	PortP->Mapped = 0;
+	PortP->WflushFlag = 0;
+	PortP->MagicFlags	= 0;
+	PortP->RxDataStart = 0;
+	PortP->TxBufferIn = 0;
+	PortP->TxBufferOut = 0;
+}
+
+/*
+** Put a command onto a port.
+** The PortPointer, command, length and arg are passed.
+** The len is the length *inclusive* of the command byte,
+** and so for a command that takes no data, len==1.
+** The arg is a single byte, and is only used if len==2.
+** Other values of len aren't allowed, and will cause
+** a panic.
+*/
+static int RIOShortCommand(struct rio_info *p, struct Port *PortP,
+		int command, int len, int arg)
+{
+	PKT *PacketP;
+	int		retries = 20; /* at 10 per second -> 2 seconds */
+	unsigned long flags;
+
+	rio_dprint(RIO_DEBUG_TTY, ("entering shortcommand.\n"));
+#ifdef CHECK
+	CheckPortP( PortP );
+	if ( len < 1 || len > 2 )
+		cprintf(("STUPID LENGTH %d\n",len));
+#endif
+
+	if ( PortP->State & RIO_DELETED ) {
+		rio_dprint(RIO_DEBUG_TTY, ("Short command to deleted RTA ignored\n"));
+		return RIO_FAIL;
+	}
+	rio_spin_lock_irqsave(&PortP->portSem, flags);
+
+	/*
+	** If the port is in use for pre-emptive command, then wait for it to 
+	** be free again.
+	*/
+	while ( (PortP->InUse != NOT_INUSE) && !p->RIOHalted ) {
+		rio_dprint(RIO_DEBUG_TTY, ("Waiting for not in use (%d)\n", 
+					   retries));
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		if (retries-- <= 0) {
+			return RIO_FAIL;
+		}
+		if (RIODelay_ni(PortP, HUNDRED_MS) == RIO_FAIL) {
+			return RIO_FAIL;
+		}
+		rio_spin_lock_irqsave(&PortP->portSem, flags);
+	}
+	if ( PortP->State & RIO_DELETED ) {
+		rio_dprint(RIO_DEBUG_TTY, ("Short command to deleted RTA ignored\n"));
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		return RIO_FAIL;
+	}
+
+	while ( !can_add_transmit(&PacketP,PortP) && !p->RIOHalted ) {
+		rio_dprint(RIO_DEBUG_TTY, ("Waiting to add short command to queue (%d)\n", retries));
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		if (retries-- <= 0) {
+		  rio_dprint(RIO_DEBUG_TTY, ("out of tries. Failing\n"));
+			return RIO_FAIL;
+		}
+		if ( RIODelay_ni(PortP, HUNDRED_MS)==RIO_FAIL ) {
+			return RIO_FAIL;
+		}
+		rio_spin_lock_irqsave(&PortP->portSem, flags);
+	}
+
+	if ( p->RIOHalted ) {
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		return RIO_FAIL;
+	}
+
+	/*
+	** set the command byte and the argument byte
+	*/
+	WBYTE(PacketP->data[0] , command);
+
+	if ( len==2 )
+		WBYTE(PacketP->data[1] , arg);
+
+	/*
+	** set the length of the packet and set the command bit.
+	*/
+	WBYTE(PacketP->len , PKT_CMD_BIT | len);
+
+	add_transmit(PortP);
+	/*
+	** Count characters transmitted for port statistics reporting
+	*/
+	if (PortP->statsGather)
+		PortP->txchars += len;
+
+	rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+	return p->RIOHalted ? RIO_FAIL : ~RIO_FAIL;
+}
+
+
+#if 0
+/*
+** This is an ioctl interface. This is the twentieth century. You know what
+** its all about.
+*/
+int
+riotioctl(p, dev, cmd, arg)
+struct rio_info *		p;
+dev_t dev;
+register int cmd;
+register caddr_t arg;
+{
+	register struct		Port *PortP;
+	register struct		ttystatics *tp;
+	int					current;
+	int					ParamSemIncremented = 0;
+	int					old_oflag, old_cflag, old_iflag, changed, oldcook;
+	int					i;
+	unsigned char		sio_regs[5];		/* Here be magic */
+	short				vpix_cflag;
+	short				divisor;
+	int					baud;
+	uint				SysPort = dev;
+	int					Modem = rio_ismodem(dev);
+	int					ioctl_processed;
+
+	rio_dprint(RIO_DEBUG_TTY, ("port ioctl SysPort %d command 0x%x argument 0x%x %s\n",
+			SysPort,cmd,arg,Modem?"Modem":"tty"));
+
+	if ( SysPort >= RIO_PORTS ) {
+		rio_dprint(RIO_DEBUG_TTY, ("Bad port number %d\n",SysPort));
+		return -ENXIO;
+	}
+
+	PortP = p->RIOPortp[SysPort];
+	tp = PortP->TtyP;
+
+	rio_spin_lock_irqsave(&PortP->portSem, flags);
+
+#ifdef STATS
+	PortP->Stat.IoctlCnt++;
+#endif
+
+	if ( PortP->State & RIO_DELETED ) {
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		return -EIO;
+	}
+
+
+	if ( p->RIOHalted ) {
+		RIOClearUp( PortP );
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		return -EIO;
+	}
+
+	/*
+	** Count ioctls for port statistics reporting
+	*/
+	if (PortP->statsGather)
+		PortP->ioctls++;
+
+	/*
+	** Specialix RIO Ioctl calls
+	*/
+	switch (cmd) {
+
+		case TCRIOTRIAD:
+			if ( arg )
+				PortP->State |= RIO_TRIAD_MODE;
+			else
+				PortP->State &= ~RIO_TRIAD_MODE;
+			/*
+			** Normally, when istrip is set on a port, a config is
+			** sent to the RTA instructing the CD1400 to do the
+			** stripping. In TRIAD mode, the interrupt receive routine
+			** must do the stripping instead, since it has to detect
+			** an 8 bit function key sequence. If istrip is set with
+			** TRIAD mode on(off), and 8 bit data is being read by
+			** the port, the user then turns TRIAD mode off(on), the RTA
+			** must be reconfigured (not) to do the stripping.
+			** Hence we call RIOParam here.
+			*/
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			RIOParam(PortP,CONFIG,Modem,OK_TO_SLEEP);	
+			return 0;
+
+		case TCRIOTSTATE:
+			rio_dprint(RIO_DEBUG_TTY, ("tbusy/tstop monitoring %sabled\n",
+		 		arg ? "en" : "dis"));
+			/* MonitorTstate = 0 ;*/
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			RIOParam(PortP, CONFIG, Modem, OK_TO_SLEEP);
+			return 0;
+
+		case TCRIOSTATE: /* current state of Modem input pins */
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOSTATE\n"));
+			if (RIOPreemptiveCmd(p, PortP, MGET) == RIO_FAIL)
+				rio_dprint(RIO_DEBUG_TTY, ("TCRIOSTATE command failed\n"));
+			PortP->State |= RIO_BUSY;
+			current = PortP->ModemState;
+			if ( copyout((caddr_t)&current, (int)arg,
+							sizeof(current))==COPYFAIL ) {
+				rio_dprint(RIO_DEBUG_TTY, ("Copyout failed\n"));
+				rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+				pseterr(EFAULT);
+			}
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+		case TCRIOMBIS:		/* Set modem lines */
+		case TCRIOMBIC:		/* Clear modem lines */
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOMBIS/TCRIOMBIC\n"));
+			if (cmd == TCRIOMBIS) {
+				uint		state;
+				state = (uint)arg;
+				PortP->ModemState |= (ushort)state;
+				PortP->ModemLines = (ulong) arg;
+				if (RIOPreemptiveCmd(p, PortP, MBIS) == RIO_FAIL)
+					rio_dprint(RIO_DEBUG_TTY, (
+					 "TCRIOMBIS command failed\n"));
+			}
+			else {
+				uint		state;
+
+				state = (uint)arg;
+				PortP->ModemState &= ~(ushort)state;
+				PortP->ModemLines = (ulong) arg;
+				if (RIOPreemptiveCmd(p, PortP, MBIC) == RIO_FAIL)
+					rio_dprint(RIO_DEBUG_TTY, ("TCRIOMBIC command failed\n"));
+			}
+			PortP->State |= RIO_BUSY;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+		case TCRIOXPON: /* set Xprint ON string */
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOXPON\n"));
+			if ( copyin((int)arg, (caddr_t)PortP->Xprint.XpOn,
+						MAX_XP_CTRL_LEN)==COPYFAIL ) {
+				rio_dprint(RIO_DEBUG_TTY, ("Copyin failed\n"));
+				PortP->Xprint.XpOn[0] = '\0';
+				rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+				pseterr(EFAULT);
+			}
+			PortP->Xprint.XpOn[MAX_XP_CTRL_LEN-1] = '\0';
+			PortP->Xprint.XpLen = RIOStrlen(PortP->Xprint.XpOn)+
+												RIOStrlen(PortP->Xprint.XpOff);
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+		case TCRIOXPOFF: /* set Xprint OFF string */
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOXPOFF\n"));
+			if ( copyin( (int)arg, (caddr_t)PortP->Xprint.XpOff,
+						MAX_XP_CTRL_LEN)==COPYFAIL ) {
+				rio_dprint(RIO_DEBUG_TTY, ("Copyin failed\n"));
+				PortP->Xprint.XpOff[0] = '\0';
+				rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+				pseterr(EFAULT);
+			}
+			PortP->Xprint.XpOff[MAX_XP_CTRL_LEN-1] = '\0';
+			PortP->Xprint.XpLen = RIOStrlen(PortP->Xprint.XpOn)+
+										RIOStrlen(PortP->Xprint.XpOff);
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+		case TCRIOXPCPS: /* set Xprint CPS string */
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOXPCPS\n"));
+			if ( (uint)arg > p->RIOConf.MaxXpCps || 
+					(uint)arg < p->RIOConf.MinXpCps ) {
+				rio_dprint(RIO_DEBUG_TTY, ("%d CPS out of range\n",arg));
+				rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+				pseterr(EINVAL);
+				return 0;
+			}
+			PortP->Xprint.XpCps = (uint)arg;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+		case TCRIOXPRINT:
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOXPRINT\n"));
+			if ( copyout((caddr_t)&PortP->Xprint, (int)arg,
+					sizeof(struct Xprint))==COPYFAIL ) {
+			        rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+				pseterr(EFAULT);
+			}
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+		case TCRIOIXANYON:
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOIXANYON\n"));
+			PortP->Config |= RIO_IXANY;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+		case TCRIOIXANYOFF:
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOIXANYOFF\n"));
+			PortP->Config &= ~RIO_IXANY;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+		case TCRIOIXONON:
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOIXONON\n"));
+			PortP->Config |= RIO_IXON;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+		case TCRIOIXONOFF:
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOIXONOFF\n"));
+			PortP->Config &= ~RIO_IXON;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			return 0;
+
+/*
+** 15.10.1998 ARG - ESIL 0761 part fix
+** Added support for CTS and RTS flow control ioctls :
+*/
+		case TCRIOCTSFLOWEN:
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOCTSFLOWEN\n"));
+			PortP->Config |= RIO_CTSFLOW;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			RIOParam(PortP,CONFIG,Modem,OK_TO_SLEEP);	
+			return 0;
+
+		case TCRIOCTSFLOWDIS:
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIOCTSFLOWDIS\n"));
+			PortP->Config &= ~RIO_CTSFLOW;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			RIOParam(PortP,CONFIG,Modem,OK_TO_SLEEP);	
+			return 0;
+
+		case TCRIORTSFLOWEN:
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIORTSFLOWEN\n"));
+			PortP->Config |= RIO_RTSFLOW;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			RIOParam(PortP,CONFIG,Modem,OK_TO_SLEEP);	
+			return 0;
+
+		case TCRIORTSFLOWDIS:
+			rio_dprint(RIO_DEBUG_TTY, ("TCRIORTSFLOWDIS\n"));
+			PortP->Config &= ~RIO_RTSFLOW;
+			rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+			RIOParam(PortP,CONFIG,Modem,OK_TO_SLEEP);	
+			return 0;
+
+/* end ESIL 0761 part fix */
+
+	}
+
+
+	/* Lynx IOCTLS */
+	switch (cmd) {
+		case TIOCSETP:
+		case TIOCSETN:
+		case OTIOCSETP:
+		case OTIOCSETN:
+			ioctl_processed++;
+			ttyseth(PortP, tp, (struct old_sgttyb *)arg);
+			break;
+		case TCSETA:
+		case TCSETAW:
+		case TCSETAF:
+			ioctl_processed++;
+			rio_dprint(RIO_DEBUG_TTY, ("NON POSIX ioctl\n"));
+			ttyseth_pv(PortP, tp, (struct termios *)arg, 0);
+			break;
+		case TCSETAP:	/* posix tcsetattr() */
+		case TCSETAWP:	/* posix tcsetattr() */
+		case TCSETAFP:	/* posix tcsetattr() */
+			rio_dprint(RIO_DEBUG_TTY, ("NON POSIX SYSV ioctl\n"));
+			ttyseth_pv(PortP, tp, (struct termios *)arg, 1);
+			ioctl_processed++;
+			break;
+	}
+
+	/*
+	** If its any of the commands that require the port to be in the
+	** non-busy state wait until all output has drained 
+	*/
+	if (!ioctl_processed)
+	switch(cmd) {
+		case TCSETAW:
+		case TCSETAF:
+		case TCSETA:
+		case TCSBRK:
+#define OLD_POSIX ('x' << 8)
+#define OLD_POSIX_SETA (OLD_POSIX | 2)
+#define OLD_POSIX_SETAW (OLD_POSIX | 3)
+#define OLD_POSIX_SETAF (OLD_POSIX | 4)
+#define NEW_POSIX (('i' << 24) | ('X' << 16))
+#define NEW_POSIX_SETA (NEW_POSIX | 2)
+#define NEW_POSIX_SETAW (NEW_POSIX | 3)
+#define NEW_POSIX_SETAF (NEW_POSIX | 4)
+		case OLD_POSIX_SETA:
+		case OLD_POSIX_SETAW:
+		case OLD_POSIX_SETAF:
+		case NEW_POSIX_SETA:
+		case NEW_POSIX_SETAW:
+		case NEW_POSIX_SETAF:
+#ifdef TIOCSETP
+		case TIOCSETP:
+#endif
+		case TIOCSETD:
+		case TIOCSETN:
+			rio_dprint(RIO_DEBUG_TTY, ("wait for non-BUSY, semaphore set\n"));
+			/*
+			** Wait for drain here, at least as far as the double buffer
+			** being empty.
+			*/
+			/* XXX Does the above comment mean that this has
+			   still to be implemented? -- REW */
+			/* XXX Is the locking OK together with locking
+                           in txenable? (Deadlock?) -- REW */
+			
+			RIOTxEnable((char *)PortP);
+			break;
+		default:
+			break;
+	}
+
+	old_cflag = tp->tm.c_cflag;
+	old_iflag = tp->tm.c_iflag;
+	old_oflag = tp->tm.c_oflag;
+	oldcook = PortP->CookMode;
+
+	if ( p->RIOHalted ) {
+		RIOClearUp( PortP );
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		pseterr(EIO);
+		return 0;
+	}
+
+	PortP->FlushCmdBodge = 0;
+
+	/*
+	** If the port is locked, and it is reconfigured, we want
+	** to restore the state of the tty structure so the change is NOT
+	** made.
+	*/
+	if (PortP->Lock) {
+		tp->tm.c_iflag = PortP->StoredTty.iflag;
+		tp->tm.c_oflag = PortP->StoredTty.oflag;
+		tp->tm.c_cflag = PortP->StoredTty.cflag;
+		tp->tm.c_lflag = PortP->StoredTty.lflag;
+		tp->tm.c_line = PortP->StoredTty.line;
+		for (i = 0; i < NCC + 1; i++)
+			tp->tm.c_cc[i] = PortP->StoredTty.cc[i];
+	}
+	else {
+		/*
+		** If the port is set to store the parameters, and it is
+		** reconfigured, we want to save the current tty struct so it
+		** may be restored on the next open.
+		*/
+		if (PortP->Store) {
+			PortP->StoredTty.iflag = tp->tm.c_iflag;
+			PortP->StoredTty.oflag = tp->tm.c_oflag;
+			PortP->StoredTty.cflag = tp->tm.c_cflag;
+			PortP->StoredTty.lflag = tp->tm.c_lflag;
+			PortP->StoredTty.line = tp->tm.c_line;
+			for (i = 0; i < NCC + 1; i++)
+				PortP->StoredTty.cc[i] = tp->tm.c_cc[i];
+		}
+	}
+
+	changed = (tp->tm.c_cflag != old_cflag) ||
+				(tp->tm.c_iflag != old_iflag) ||
+				(tp->tm.c_oflag != old_oflag);
+
+	PortP->CookMode = RIOCookMode(tp);	/* Set new cooking mode */
+
+	rio_dprint(RIO_DEBUG_TTY, ("RIOIoctl changed %d newcook %d oldcook %d\n",
+			changed,PortP->CookMode,oldcook));
+
+#ifdef MODEM_SUPPORT
+	/*
+	** kludge to force CARR_ON if CLOCAL set
+	*/
+	if ((tp->tm.c_cflag & CLOCAL) || (PortP->ModemState & MSVR1_CD))	{
+		tp->tm.c_state |= CARR_ON;
+		wakeup ((caddr_t)&tp->tm.c_canq);
+	}
+#endif
+
+	if ( p->RIOHalted ) {
+		RIOClearUp( PortP );
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		pseterr(EIO);
+		return 0;
+	}
+	/*
+	** Re-configure if modes or cooking have changed
+	*/
+	if (changed || oldcook != PortP->CookMode || (ioctl_processed)) {
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		rio_dprint(RIO_DEBUG_TTY, ("Ioctl changing the PORT settings\n"));
+		RIOParam(PortP,CONFIG,Modem,OK_TO_SLEEP);	
+		rio_spin_lock_irqsave(&PortP->portSem, flags);
+	}
+
+	if (p->RIOHalted) {
+		rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+		RIOClearUp( PortP );
+		pseterr(EIO);
+		return 0;
+	}
+	rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+	return 0;
+}
+
+/*
+	ttyseth -- set hardware dependant tty settings
+*/
+void
+ttyseth(PortP, s, sg)
+struct Port *		PortP;
+struct ttystatics *		s;
+struct old_sgttyb *sg;
+{
+	struct old_sgttyb *	tsg;
+	struct termios *tp = &s->tm;
+
+	tsg = &s->sg;
+
+	if (sg->sg_flags & (EVENP|ODDP))  {
+		tp->c_cflag &= PARENB;
+		if (sg->sg_flags & EVENP) {
+			if (sg->sg_flags & ODDP) {
+				tp->c_cflag &= V_CS7;
+				tp->c_cflag &= ~PARENB;
+			}
+			else {
+				tp->c_cflag &= V_CS7;
+				tp->c_cflag &= PARENB;
+				tp->c_cflag &= PARODD;
+			}
+		}
+		else if (sg->sg_flags & ODDP) {
+			tp->c_cflag &= V_CS7;
+			tp->c_cflag &= PARENB;
+			tp->c_cflag &= PARODD;
+		}
+		else {
+			tp->c_cflag &= V_CS7;
+			tp->c_cflag &= PARENB;
+		}
+	}
+/*
+ * Use ispeed as the desired speed.  Most implementations don't handle 
+ * separate input and output speeds very well. If the RIO handles this, 
+ * I will have to use separate sets of flags to store them in the 
+ * Port structure.
+ */
+	if ( !sg->sg_ospeed )
+		sg->sg_ospeed = sg->sg_ispeed;
+	else
+		sg->sg_ispeed = sg->sg_ospeed;
+	if (sg->sg_ispeed > V_EXTB ) 
+		sg->sg_ispeed = V_EXTB;
+	if (sg->sg_ispeed < V_B0)
+		sg->sg_ispeed = V_B0;
+	*tsg = *sg;
+   tp->c_cflag = (tp->c_cflag & ~V_CBAUD) | conv_bv[(int)sg->sg_ispeed];
+}
+
+/*
+	ttyseth_pv -- set hardware dependant tty settings using either the
+			POSIX termios structure or the System V termio structure.
+				sysv = 0 => (POSIX):	 struct termios *sg
+				sysv != 0 => (System V): struct termio *sg
+*/
+static void
+ttyseth_pv(PortP, s, sg, sysv)
+struct Port *PortP;
+struct ttystatics *s;
+struct termios *sg;
+int sysv;
+{
+    int speed;
+    unsigned char csize;
+    unsigned char cread;
+    unsigned int lcr_flags;
+    int ps;
+ 
+    if (sysv) {
+        /* sg points to a System V termio structure */
+        csize = ((struct termio *)sg)->c_cflag & CSIZE;
+        cread = ((struct termio *)sg)->c_cflag & CREAD;
+        speed = conv_vb[((struct termio *)sg)->c_cflag & V_CBAUD];
+    }
+    else {
+        /* sg points to a POSIX termios structure */
+        csize = sg->c_cflag & CSIZE;
+        cread = sg->c_cflag & CREAD;
+        speed = conv_vb[sg->c_cflag & V_CBAUD];
+    }
+    if (s->sg.sg_ispeed != speed || s->sg.sg_ospeed != speed) {
+        s->sg.sg_ispeed = speed;
+        s->sg.sg_ospeed = speed;
+        s->tm.c_cflag = (s->tm.c_cflag & ~V_CBAUD) |
+                         conv_bv[(int)s->sg.sg_ispeed];
+    }
+}
+#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)