patch-2.2.15 linux/drivers/char/rio/rioparam.c

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diff -u --new-file --recursive --exclude-from ../../exclude v2.2.14/drivers/char/rio/rioparam.c linux/drivers/char/rio/rioparam.c
@@ -0,0 +1,728 @@
+/*
+** -----------------------------------------------------------------------------
+**
+**  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		: rioparam.c
+**	SID		: 1.3
+**	Last Modified	: 11/6/98 10:33:45
+**	Retrieved	: 11/6/98 10:33:50
+**
+**  ident @(#)rioparam.c	1.3
+**
+** -----------------------------------------------------------------------------
+*/
+
+#ifdef SCCS_LABELS
+static char *_rioparam_c_sccs_ = "@(#)rioparam.c	1.3";
+#endif
+
+#define __NO_VERSION__
+#include <linux/config.h>
+#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"
+
+
+
+/*
+** The Scam, based on email from jeremyr@bugs.specialix.co.uk....
+**
+** To send a command on a particular port, you put a packet with the
+** command bit set onto the port. The command bit is in the len field,
+** and gets ORed in with the actual byte count.
+**
+** When you send a packet with the command bit set, then the first
+** data byte ( data[0] ) is interpretted as the command to execute.
+** It also governs what data structure overlay should accompany the packet.
+** Commands are defined in cirrus/cirrus.h
+**
+** If you want the command to pre-emt data already on the queue for the
+** port, set the pre-emptive bit in conjunction with the command bit.
+** It is not defined what will happen if you set the preemptive bit
+** on a packet that is NOT a command.
+**
+** Pre-emptive commands should be queued at the head of the queue using
+** add_start(), whereas normal commands and data are enqueued using
+** add_end().
+**
+** Most commands do not use the remaining bytes in the data array. The
+** exceptions are OPEN MOPEN and CONFIG. (NB. As with the SI CONFIG and
+** OPEN are currently analagous). With these three commands the following
+** 11 data bytes are all used to pass config information such as baud rate etc.
+** The fields are also defined in cirrus.h. Some contain straightforward
+** information such as the transmit XON character. Two contain the transmit and
+** receive baud rates respectively. For most baud rates there is a direct
+** mapping between the rates defined in <sys/termio.h> and the byte in the
+** packet. There are additional (non UNIX-standard) rates defined in
+** /u/dos/rio/cirrus/h/brates.h.
+**
+** The rest of the data fields contain approximations to the Cirrus registers
+** that are used to program number of bits etc. Each registers bit fields is
+** defined in cirrus.h.
+** 
+** NB. Only use those bits that are defined as being driver specific
+** or common to the RTA and the driver.
+** 
+** All commands going from RTA->Host will be dealt with by the Host code - you
+** will never see them. As with the SI there will be three fields to look out
+** for in each phb (not yet defined - needs defining a.s.a.p).
+** 
+** modem_status	- current state of handshake pins.
+**
+** port_status	 - current port status - equivalent to hi_stat for SI, indicates
+** if port is IDLE_OPEN, IDLE_CLOSED etc.
+**
+** break_status	- bit X set if break has been received.
+** 
+** Happy hacking.
+** 
+*/
+
+/* 
+** RIOParam is used to open or configure a port. You pass it a PortP,
+** which will have a tty struct attached to it. You also pass a command,
+** either OPEN or CONFIG. The port's setup is taken from the t_ fields
+** of the tty struct inside the PortP, and the port is either opened
+** or re-configured. You must also tell RIOParam if the device is a modem
+** device or not (i.e. top bit of minor number set or clear - take special
+** care when deciding on this!).
+** RIOParam neither flushes nor waits for drain, and is NOT preemptive.
+**
+** RIOParam assumes it will be called at splrio(), and also assumes
+** that CookMode is set correctly in the port structure.
+**
+** NB. for MPX
+**	tty lock must NOT have been previously acquired.
+*/
+int
+RIOParam(PortP, cmd, Modem, SleepFlag)
+struct Port *PortP;
+int cmd;
+int Modem;
+int SleepFlag; 
+{
+	register struct tty_struct *TtyP;
+	int	retval;
+	register struct phb_param *phb_param_ptr;
+	PKT *PacketP;
+	int res;
+	uchar Cor1=0, Cor2=0, Cor4=0, Cor5=0;
+	uchar TxXon=0, TxXoff=0, RxXon=0, RxXoff=0;
+	uchar LNext=0, TxBaud=0, RxBaud=0;
+	int		retries = 0xff;
+	unsigned long flags;
+
+	TtyP = PortP->gs.tty;
+
+	rio_dprint(RIO_DEBUG_PARAM, ("RIOParam: Port:%d cmd:%d Modem:%d SleepFlag:%d Mapped: %d, tty=%p\n",
+	    PortP->PortNum, cmd, Modem, SleepFlag, PortP->Mapped, TtyP) );
+
+	if (!TtyP) {
+	  rio_dprint (RIO_DEBUG_PARAM, ("Can't call rioparam with null tty.\n"));
+	  return RIO_FAIL;
+	}
+	rio_spin_lock_irqsave(&PortP->portSem, flags );
+
+	if (cmd == OPEN) {
+		/*
+		** If the port is set to store or lock the parameters, and it is
+		** paramed with OPEN, we want to restore the saved port termio, but
+		** only if StoredTermio has been saved, i.e. NOT 1st open after reboot.
+		*/
+#if 0
+		if (PortP->FirstOpen) {
+			PortP->StoredTty.iflag = TtyP->tm.c_iflag;
+			PortP->StoredTty.oflag = TtyP->tm.c_oflag;
+			PortP->StoredTty.cflag = TtyP->tm.c_cflag;
+			PortP->StoredTty.lflag = TtyP->tm.c_lflag;
+			PortP->StoredTty.line = TtyP->tm.c_line;
+			for (i = 0; i < NCC + 5; i++)
+				PortP->StoredTty.cc[i] = TtyP->tm.c_cc[i];
+			PortP->FirstOpen = 0;
+		}
+		else if (PortP->Store || PortP->Lock) {
+			rio_dprint(RIO_DEBUG_PARAM, ("OPEN: Restoring stored/locked params\n"));
+			TtyP->tm.c_iflag = PortP->StoredTty.iflag;
+			TtyP->tm.c_oflag = PortP->StoredTty.oflag;
+			TtyP->tm.c_cflag = PortP->StoredTty.cflag;
+			TtyP->tm.c_lflag = PortP->StoredTty.lflag;
+			TtyP->tm.c_line = PortP->StoredTty.line;
+			for (i = 0; i < NCC + 5; i++)
+				TtyP->tm.c_cc[i] = PortP->StoredTty.cc[i];
+		}
+#endif
+	}
+
+	/*
+	** wait for space
+	*/
+	while ( !(res=can_add_transmit(&PacketP,PortP)) || 
+			(PortP->InUse != NOT_INUSE) ) {
+		if (retries -- <= 0) {
+			break;
+		}
+		if ( PortP->InUse != NOT_INUSE ) {
+			rio_dprint(RIO_DEBUG_PARAM, ("Port IN_USE for pre-emptive command\n"));
+		}
+
+		if ( !res ) {
+			rio_dprint(RIO_DEBUG_PARAM, ("Port has no space on transmit queue\n"));
+		}
+
+		if ( SleepFlag != OK_TO_SLEEP ) {
+			rio_spin_unlock_irqrestore( &PortP->portSem, flags);
+			return RIO_FAIL;
+		}
+
+		rio_dprint(RIO_DEBUG_PARAM, ("wait for can_add_transmit\n"));
+		rio_spin_unlock_irqrestore( &PortP->portSem, flags);
+		retval = RIODelay(PortP, HUNDRED_MS);
+		rio_spin_lock_irqsave( &PortP->portSem, flags);
+		if (retval == RIO_FAIL) {
+			rio_dprint(RIO_DEBUG_PARAM, ("wait for can_add_transmit broken by signal\n"));
+			rio_spin_unlock_irqrestore( &PortP->portSem, flags);
+			pseterr(EINTR);
+			return RIO_FAIL;
+		}
+		if ( PortP->State & RIO_DELETED ) {
+			rio_spin_unlock_irqrestore( &PortP->portSem, flags);
+			return RIO_SUCCESS;
+		}
+	}
+
+	if (!res) {
+		rio_spin_unlock_irqrestore( &PortP->portSem, flags);
+		return RIO_FAIL;
+	}
+
+	rio_dprint(RIO_DEBUG_PARAM, ("can_add_transmit() returns %x\n",res));
+	rio_dprint(RIO_DEBUG_PARAM, ("Packet is 0x%x\n",(int) PacketP));
+
+	phb_param_ptr = (struct phb_param *)PacketP->data;
+
+
+#if 0
+	/*
+	** COR 1
+	*/
+	if ( TtyP->tm.c_iflag & INPCK ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Parity checking on input enabled\n"));
+		Cor1 |= COR1_INPCK;
+	}
+#endif
+
+	switch ( TtyP->termios->c_cflag & CSIZE ) {
+		case CS5:
+		{
+			rio_dprint(RIO_DEBUG_PARAM, ("5 bit data\n"));
+			Cor1 |= COR1_5BITS;
+			break;
+		}
+		case CS6:
+		{
+			rio_dprint(RIO_DEBUG_PARAM, ("6 bit data\n"));
+			Cor1 |= COR1_6BITS;
+			break;
+		}
+		case CS7:
+		{
+			rio_dprint(RIO_DEBUG_PARAM, ("7 bit data\n"));
+			Cor1 |= COR1_7BITS;
+			break;
+		}
+		case CS8:
+		{
+			rio_dprint(RIO_DEBUG_PARAM, ("8 bit data\n"));
+			Cor1 |= COR1_8BITS;
+			break;
+		}
+	}
+
+	if ( TtyP->termios->c_cflag & CSTOPB ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("2 stop bits\n"));
+		Cor1 |= COR1_2STOP;
+	}
+	else {
+		rio_dprint(RIO_DEBUG_PARAM, ("1 stop bit\n"));
+		Cor1 |= COR1_1STOP;
+	}
+
+	if ( TtyP->termios->c_cflag & PARENB ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Enable parity\n"));
+		Cor1 |= COR1_NORMAL;
+	}
+	else {
+		rio_dprint(RIO_DEBUG_PARAM, ("Disable parity\n"));
+		Cor1 |= COR1_NOP;
+	}
+	if ( TtyP->termios->c_cflag & PARODD ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Odd parity\n"));
+		Cor1 |= COR1_ODD;
+	}
+	else {
+		rio_dprint(RIO_DEBUG_PARAM, ("Even parity\n"));
+		Cor1 |= COR1_EVEN; 
+	}
+
+	/*
+	** COR 2
+	*/
+	if ( TtyP->termios->c_iflag & IXON ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Enable start/stop output control\n"));
+		Cor2 |= COR2_IXON;
+	}
+	else {
+		if ( PortP->Config & RIO_IXON ) {
+			rio_dprint(RIO_DEBUG_PARAM, ("Force enable start/stop output control\n"));
+			Cor2 |= COR2_IXON;
+		}
+		else
+			rio_dprint(RIO_DEBUG_PARAM, ("IXON has been disabled.\n"));
+	}
+
+	if (TtyP->termios->c_iflag & IXANY) {
+		if ( PortP->Config & RIO_IXANY ) {
+			rio_dprint(RIO_DEBUG_PARAM, ("Enable any key to restart output\n"));
+			Cor2 |= COR2_IXANY;
+		}
+		else
+			rio_dprint(RIO_DEBUG_PARAM, ("IXANY has been disabled due to sanity reasons.\n"));
+	}
+
+	if ( TtyP->termios->c_iflag & IXOFF ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Enable start/stop input control 2\n"));
+		Cor2 |= COR2_IXOFF;
+	}
+
+	if ( TtyP->termios->c_cflag & HUPCL ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Hangup on last close\n"));
+		Cor2 |= COR2_HUPCL;
+	}
+
+	if ( C_CRTSCTS (TtyP)) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Rx hardware flow control enabled\n"));
+		Cor2 |= COR2_CTSFLOW;
+		Cor2 |= COR2_RTSFLOW;
+	} else {
+		rio_dprint(RIO_DEBUG_PARAM, ("Rx hardware flow control disabled\n"));
+		Cor2 &= ~COR2_CTSFLOW;
+		Cor2 &= ~COR2_RTSFLOW;
+	}
+
+
+	if ( TtyP->termios->c_cflag & CLOCAL ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Local line\n"));
+	}
+	else {
+		rio_dprint(RIO_DEBUG_PARAM, ("Possible Modem line\n"));
+	}
+
+	/*
+	** COR 4 (there is no COR 3)
+	*/
+	if ( TtyP->termios->c_iflag & IGNBRK ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Ignore break condition\n"));
+		Cor4 |= COR4_IGNBRK;
+	}
+	if ( !(TtyP->termios->c_iflag & BRKINT) ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Break generates NULL condition\n"));
+		Cor4 |= COR4_NBRKINT;
+	} else {
+		rio_dprint(RIO_DEBUG_PARAM, ("Interrupt on	break condition\n"));
+	}
+
+	if ( TtyP->termios->c_iflag & INLCR ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Map newline to carriage return on input\n"));
+		Cor4 |= COR4_INLCR;
+	}
+
+	if ( TtyP->termios->c_iflag & IGNCR ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Ignore carriage return on input\n"));
+		Cor4 |= COR4_IGNCR;
+	}
+
+	if ( TtyP->termios->c_iflag & ICRNL ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Map carriage return to newline on input\n"));
+		Cor4 |= COR4_ICRNL;
+	}
+	if ( TtyP->termios->c_iflag & IGNPAR ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Ignore characters with parity errors\n"));
+		Cor4 |= COR4_IGNPAR;
+	}
+	if ( TtyP->termios->c_iflag & PARMRK ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Mark parity errors\n"));
+		Cor4 |= COR4_PARMRK;
+	}
+
+	/*
+	** Set the RAISEMOD flag to ensure that the modem lines are raised
+	** on reception of a config packet.
+	** The download code handles the zero baud condition.
+	*/
+	Cor4 |= COR4_RAISEMOD;
+
+	/*
+	** COR 5
+	*/
+
+	Cor5 = COR5_CMOE;
+
+	/*
+	** Set to monitor tbusy/tstop (or not).
+	*/
+
+	if (PortP->MonitorTstate)
+		Cor5 |= COR5_TSTATE_ON;
+	else
+		Cor5 |= COR5_TSTATE_OFF;
+
+	/*
+	** Could set LNE here if you wanted LNext processing. SVR4 will use it.
+	*/
+	if ( TtyP->termios->c_iflag & ISTRIP ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Strip input characters\n"));
+		if (! (PortP->State & RIO_TRIAD_MODE)) {
+			Cor5 |= COR5_ISTRIP;
+		}
+	}
+
+	if ( TtyP->termios->c_oflag & ONLCR ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Map newline to carriage-return, newline on output\n"));
+		if ( PortP->CookMode == COOK_MEDIUM )
+			Cor5 |= COR5_ONLCR;
+	}
+	if ( TtyP->termios->c_oflag & OCRNL ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Map carriage return to newline on output\n"));
+		if ( PortP->CookMode == COOK_MEDIUM )
+			Cor5 |= COR5_OCRNL;
+	}
+	if ( ( TtyP->termios->c_oflag & TABDLY) == TAB3 ) {
+		rio_dprint(RIO_DEBUG_PARAM, ("Tab delay 3 set\n"));
+		if ( PortP->CookMode == COOK_MEDIUM )
+			Cor5 |= COR5_TAB3;
+	}
+
+	/*
+	** Flow control bytes.
+	*/
+	TxXon = TtyP->termios->c_cc[VSTART];
+	TxXoff = TtyP->termios->c_cc[VSTOP];
+	RxXon = TtyP->termios->c_cc[VSTART];
+	RxXoff = TtyP->termios->c_cc[VSTOP];
+	/*
+	** LNEXT byte
+	*/
+	LNext = 0;
+
+	/*
+	** Baud rate bytes
+	*/
+	rio_dprint(RIO_DEBUG_PARAM, ("Mapping of rx/tx baud %x (%x)\n", 
+				     TtyP->termios->c_cflag, CBAUD));
+
+	switch (TtyP->termios->c_cflag & CBAUD) {
+#define e(b) case B ## b : RxBaud = TxBaud = RIO_B ## b ;break
+	  e(50);e(75);e(110);e(134);e(150);e(200);e(300);e(600);e(1200);
+	  e(1800);e(2400);e(4800);e(9600);e(19200);e(38400);e(57600);
+	  e(115200); /* e(230400);e(460800); e(921600);  */
+	}
+
+	/* XXX MIssing conversion table. XXX */
+	/* 	 (TtyP->termios->c_cflag & V_CBAUD); */
+
+	rio_dprint(RIO_DEBUG_PARAM, ("tx baud 0x%x, rx baud 0x%x\n", TxBaud, RxBaud));
+
+
+	/*
+	** Leftovers
+	*/
+	if ( TtyP->termios->c_cflag & CREAD )
+		rio_dprint(RIO_DEBUG_PARAM, ("Enable receiver\n"));
+#ifdef RCV1EN
+	if ( TtyP->termios->c_cflag & RCV1EN )
+		rio_dprint(RIO_DEBUG_PARAM, ("RCV1EN (?)\n"));
+#endif
+#ifdef XMT1EN
+	if ( TtyP->termios->c_cflag & XMT1EN )
+		rio_dprint(RIO_DEBUG_PARAM, ("XMT1EN (?)\n"));
+#endif
+#if 0
+	if ( TtyP->termios->c_cflag & LOBLK )
+		rio_dprint(RIO_DEBUG_PARAM, ("LOBLK - JCL output blocks when not current\n"));
+#endif
+	if ( TtyP->termios->c_lflag & ISIG )
+		rio_dprint(RIO_DEBUG_PARAM, ("Input character signal generating enabled\n"));
+	if ( TtyP->termios->c_lflag & ICANON )
+		rio_dprint(RIO_DEBUG_PARAM, ("Canonical input: erase and kill enabled\n"));
+	if ( TtyP->termios->c_lflag & XCASE )
+		rio_dprint(RIO_DEBUG_PARAM, ("Canonical upper/lower presentation\n"));
+	if ( TtyP->termios->c_lflag & ECHO )
+		rio_dprint(RIO_DEBUG_PARAM, ("Enable input echo\n"));
+	if ( TtyP->termios->c_lflag & ECHOE )
+		rio_dprint(RIO_DEBUG_PARAM, ("Enable echo erase\n"));
+	if ( TtyP->termios->c_lflag & ECHOK )
+		rio_dprint(RIO_DEBUG_PARAM, ("Enable echo kill\n"));
+	if ( TtyP->termios->c_lflag & ECHONL )
+		rio_dprint(RIO_DEBUG_PARAM, ("Enable echo newline\n"));
+	if ( TtyP->termios->c_lflag & NOFLSH )
+		rio_dprint(RIO_DEBUG_PARAM, ("Disable flush after interrupt or quit\n"));
+#ifdef TOSTOP
+	if ( TtyP->termios->c_lflag & TOSTOP )
+		rio_dprint(RIO_DEBUG_PARAM, ("Send SIGTTOU for background output\n"));
+#endif
+#ifdef XCLUDE
+	if ( TtyP->termios->c_lflag & XCLUDE )
+		rio_dprint(RIO_DEBUG_PARAM, ("Exclusive use of this line\n"));
+#endif
+	if ( TtyP->termios->c_iflag & IUCLC )
+		rio_dprint(RIO_DEBUG_PARAM, ("Map uppercase to lowercase on input\n"));
+	if ( TtyP->termios->c_oflag & OPOST )
+		rio_dprint(RIO_DEBUG_PARAM, ("Enable output post-processing\n"));
+	if ( TtyP->termios->c_oflag & OLCUC )
+		rio_dprint(RIO_DEBUG_PARAM, ("Map lowercase to uppercase on output\n"));
+	if ( TtyP->termios->c_oflag & ONOCR )
+		rio_dprint(RIO_DEBUG_PARAM, ("No carriage return output at column 0\n"));
+	if ( TtyP->termios->c_oflag & ONLRET )
+		rio_dprint(RIO_DEBUG_PARAM, ("Newline performs carriage return function\n"));
+	if ( TtyP->termios->c_oflag & OFILL )
+		rio_dprint(RIO_DEBUG_PARAM, ("Use fill characters for delay\n"));
+	if ( TtyP->termios->c_oflag & OFDEL )
+		rio_dprint(RIO_DEBUG_PARAM, ("Fill character is DEL\n"));
+	if ( TtyP->termios->c_oflag & NLDLY )
+		rio_dprint(RIO_DEBUG_PARAM, ("Newline delay set\n"));
+	if ( TtyP->termios->c_oflag & CRDLY )
+		rio_dprint(RIO_DEBUG_PARAM, ("Carriage return delay set\n"));
+	if ( TtyP->termios->c_oflag & TABDLY )
+		rio_dprint(RIO_DEBUG_PARAM, ("Tab delay set\n"));
+#if 0
+	if ( TtyP->termios->c_oflag & BSDLY )
+		rio_dprint(RIO_DEBUG_PARAM, ("Back-space delay set\n"));
+	if ( TtyP->termios->c_oflag & VTDLY )
+		rio_dprint(RIO_DEBUG_PARAM, ("Vertical tab delay set\n"));
+	if ( TtyP->termios->c_oflag & FFDLY )
+		rio_dprint(RIO_DEBUG_PARAM, ("Form-feed delay set\n"));
+#endif
+	/*
+	** These things are kind of useful in a later life!
+	*/
+	PortP->Cor2Copy = Cor2;
+
+	if ( PortP->State & RIO_DELETED ) {
+		rio_spin_unlock_irqrestore( &PortP->portSem, flags);
+		return RIO_FAIL;
+	}
+
+	/*
+	** Actually write the info into the packet to be sent
+	*/
+	WBYTE(phb_param_ptr->Cmd,	cmd);
+	WBYTE(phb_param_ptr->Cor1,	 Cor1);
+	WBYTE(phb_param_ptr->Cor2,	 Cor2);
+	WBYTE(phb_param_ptr->Cor4,	 Cor4);
+	WBYTE(phb_param_ptr->Cor5,	 Cor5);
+	WBYTE(phb_param_ptr->TxXon,	TxXon);
+	WBYTE(phb_param_ptr->RxXon,	RxXon);
+	WBYTE(phb_param_ptr->TxXoff, TxXoff);
+	WBYTE(phb_param_ptr->RxXoff, RxXoff);
+	WBYTE(phb_param_ptr->LNext,	LNext);
+	WBYTE(phb_param_ptr->TxBaud, TxBaud);
+	WBYTE(phb_param_ptr->RxBaud, RxBaud);
+
+	/*
+	** Set the length/command field
+	*/
+	WBYTE(PacketP->len , 12 | PKT_CMD_BIT);
+
+	/*
+	** The packet is formed - now, whack it off
+	** to its final destination:
+	*/
+	add_transmit(PortP);
+	/*
+	** Count characters transmitted for port statistics reporting
+	*/
+	if (PortP->statsGather)
+		PortP->txchars += 12;
+
+	rio_spin_unlock_irqrestore( &PortP->portSem, flags);
+
+	rio_dprint(RIO_DEBUG_PARAM, ("add_transmit returned.\n"));
+	/*
+	** job done.
+	*/
+	return RIO_SUCCESS;
+}
+
+
+/*
+** We can add another packet to a transmit queue if the packet pointer pointed
+** to by the TxAdd pointer has PKT_IN_USE clear in its address.
+*/
+int
+can_add_transmit(PktP, PortP)
+PKT **PktP;
+struct Port *PortP; 
+{
+	register PKT *tp;
+
+	*PktP = tp = (PKT *)RIO_PTR(PortP->Caddr,RWORD(*PortP->TxAdd));
+
+	return !((uint)tp & PKT_IN_USE);
+}
+
+/*
+** To add a packet to the queue, you set the PKT_IN_USE bit in the address,
+** and then move the TxAdd pointer along one position to point to the next
+** packet pointer. You must wrap the pointer from the end back to the start.
+*/
+void
+add_transmit(PortP)
+struct Port *PortP; 
+{
+  if (RWORD(*PortP->TxAdd) & PKT_IN_USE) {
+    rio_dprint (RIO_DEBUG_PARAM, ("add_transmit: Packet has been stolen!"));
+  }
+	WWORD( *(ushort *)PortP->TxAdd, RWORD(*PortP->TxAdd) | PKT_IN_USE);
+	PortP->TxAdd = (PortP->TxAdd == PortP->TxEnd) ? PortP->TxStart : 
+					PortP->TxAdd + 1;
+	WWORD( PortP->PhbP->tx_add , RIO_OFF(PortP->Caddr,PortP->TxAdd) );
+}
+
+/****************************************
+ * Put a packet onto the end of the
+ * free list
+ ****************************************/
+void
+put_free_end(HostP, PktP)
+struct Host *HostP;
+PKT *PktP;
+{
+	FREE_LIST *tmp_pointer;
+	ushort old_end, new_end;
+	unsigned long flags;
+
+	rio_spin_lock_irqsave(&HostP->HostLock, flags);
+
+	 /*************************************************
+	* Put a packet back onto the back of the free list
+	*
+	************************************************/
+
+	rio_dprint(RIO_DEBUG_PFE, ("put_free_end(PktP=%x)\n",(int)PktP));
+
+	if ((old_end=RWORD(HostP->ParmMapP->free_list_end)) != TPNULL) {
+		new_end = RIO_OFF(HostP->Caddr,PktP);
+		tmp_pointer = (FREE_LIST *)RIO_PTR(HostP->Caddr,old_end);
+		WWORD(tmp_pointer->next , new_end );
+		WWORD(((FREE_LIST *)PktP)->prev , old_end);
+		WWORD(((FREE_LIST *)PktP)->next , TPNULL);
+		WWORD(HostP->ParmMapP->free_list_end, new_end);
+	}
+	else {	/* First packet on the free list this should never happen! */
+		rio_dprint(RIO_DEBUG_PFE, ("put_free_end(): This should never happen\n"));
+		WWORD(HostP->ParmMapP->free_list_end , RIO_OFF(HostP->Caddr,PktP));
+		tmp_pointer = (FREE_LIST *)PktP;
+		WWORD(tmp_pointer->prev , TPNULL);
+		WWORD(tmp_pointer->next , TPNULL);
+	}
+	rio_spin_unlock_irqrestore(&HostP->HostLock, flags);
+}
+
+/*
+** can_remove_receive(PktP,P) returns non-zero if PKT_IN_USE is set
+** for the next packet on the queue. It will also set PktP to point to the
+** relevent packet, [having cleared the PKT_IN_USE bit]. If PKT_IN_USE is clear,
+** then can_remove_receive() returns 0.
+*/
+int
+can_remove_receive(PktP, PortP)
+PKT **PktP;
+struct Port *PortP;
+{
+	if ( RWORD(*PortP->RxRemove) & PKT_IN_USE) {
+		*PktP = (PKT *)RIO_PTR(PortP->Caddr,
+					RWORD(*PortP->RxRemove) & ~PKT_IN_USE);
+		return 1;
+	}
+	return 0;
+}
+
+/*
+** To remove a packet from the receive queue you clear its PKT_IN_USE bit,
+** and then bump the pointers. Once the pointers get to the end, they must
+** be wrapped back to the start.
+*/
+void
+remove_receive(PortP)
+struct Port *PortP; 
+{
+	WWORD( *PortP->RxRemove, RWORD(*PortP->RxRemove) & ~PKT_IN_USE );
+	PortP->RxRemove = (PortP->RxRemove == PortP->RxEnd) ? PortP->RxStart : 
+								PortP->RxRemove + 1;
+	WWORD( PortP->PhbP->rx_remove , RIO_OFF(PortP->Caddr, PortP->RxRemove) );
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)