/****************************************************************************
 *******                                                              *******
 *******                 P H B     H E A D E R                        *******
 *******                                                              *******
 ****************************************************************************

 Author  : Ian Nandhra, Jeremy Rolls
 Date    : 

 *
 *  (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.

 Version : 0.01


                            Mods
 ----------------------------------------------------------------------------
  Date     By                Description
 ----------------------------------------------------------------------------

 ***************************************************************************/

#ifndef _phb_h
#define _phb_h 1

#ifdef SCCS_LABELS
#ifndef lint
/* static char *_rio_phb_h_sccs = "@(#)phb.h	1.12"; */
#endif
#endif


 /*************************************************
  * Set the LIMIT values.
  ************************************************/
#ifdef RTA
#define RX_LIMIT       (ushort) 3
#endif
#ifdef HOST
#define RX_LIMIT       (ushort) 1
#endif


/*************************************************
 * Handshake asserted. Deasserted by the LTT(s)
 ************************************************/
#define PHB_HANDSHAKE_SET      ((ushort) 0x001)	/* Set by LRT */

#define PHB_HANDSHAKE_RESET     ((ushort) 0x002)	/* Set by ISR / driver */

#define PHB_HANDSHAKE_FLAGS     (PHB_HANDSHAKE_RESET | PHB_HANDSHAKE_SET)
						/* Reset by ltt */


/*************************************************
 * Maximum number of PHB's
 ************************************************/
#if defined (HOST) || defined (INKERNEL)
#define MAX_PHB               ((ushort) 128)	/* range 0-127 */
#else
#define MAX_PHB               ((ushort) 8)	/* range 0-7 */
#endif

/*************************************************
 * Defines for the mode fields
 ************************************************/
#define TXPKT_INCOMPLETE        0x0001	/* Previous tx packet not completed */
#define TXINTR_ENABLED          0x0002	/* Tx interrupt is enabled */
#define TX_TAB3                 0x0004	/* TAB3 mode */
#define TX_OCRNL                0x0008	/* OCRNL mode */
#define TX_ONLCR                0x0010	/* ONLCR mode */
#define TX_SENDSPACES           0x0020	/* Send n spaces command needs
					   completing */
#define TX_SENDNULL             0x0040	/* Escaping NULL needs completing */
#define TX_SENDLF               0x0080	/* LF -> CR LF needs completing */
#define TX_PARALLELBUG          0x0100	/* CD1400 LF -> CR LF bug on parallel
					   port */
#define TX_HANGOVER             (TX_SENDSPACES | TX_SENDLF | TX_SENDNULL)
#define TX_DTRFLOW		0x0200	/* DTR tx flow control */
#define	TX_DTRFLOWED		0x0400	/* DTR is low - don't allow more data
					   into the FIFO */
#define	TX_DATAINFIFO		0x0800	/* There is data in the FIFO */
#define	TX_BUSY			0x1000	/* Data in FIFO, shift or holding regs */

#define RX_SPARE	        0x0001	/* SPARE */
#define RXINTR_ENABLED          0x0002	/* Rx interrupt enabled */
#define RX_ICRNL                0x0008	/* ICRNL mode */
#define RX_INLCR                0x0010	/* INLCR mode */
#define RX_IGNCR                0x0020	/* IGNCR mode */
#define RX_CTSFLOW              0x0040	/* CTSFLOW enabled */
#define RX_IXOFF                0x0080	/* IXOFF enabled */
#define RX_CTSFLOWED            0x0100	/* CTSFLOW and CTS dropped */
#define RX_IXOFFED              0x0200	/* IXOFF and xoff sent */
#define RX_BUFFERED		0x0400	/* Try and pass on complete packets */

#define PORT_ISOPEN             0x0001	/* Port open? */
#define PORT_HUPCL              0x0002	/* Hangup on close? */
#define PORT_MOPENPEND          0x0004	/* Modem open pending */
#define PORT_ISPARALLEL         0x0008	/* Parallel port */
#define PORT_BREAK              0x0010	/* Port on break */
#define PORT_STATUSPEND		0x0020	/* Status packet pending */
#define PORT_BREAKPEND          0x0040	/* Break packet pending */
#define PORT_MODEMPEND          0x0080	/* Modem status packet pending */
#define PORT_PARALLELBUG        0x0100	/* CD1400 LF -> CR LF bug on parallel
					   port */
#define PORT_FULLMODEM          0x0200	/* Full modem signals */
#define PORT_RJ45               0x0400	/* RJ45 connector - no RI signal */
#define PORT_RESTRICTED         0x0600	/* Restricted connector - no RI / DTR */

#define PORT_MODEMBITS          0x0600	/* Mask for modem fields */

#define PORT_WCLOSE             0x0800	/* Waiting for close */
#define	PORT_HANDSHAKEFIX	0x1000	/* Port has H/W flow control fix */
#define	PORT_WASPCLOSED		0x2000	/* Port closed with PCLOSE */
#define	DUMPMODE		0x4000	/* Dump RTA mem */
#define	READ_REG		0x8000	/* Read CD1400 register */


/**************************************************************************
 * PHB Structure
 * A  few words.
 *
 * Normally Packets are added to the end of the list and removed from
 * the start. The pointer tx_add points to a SPACE to put a Packet.
 * The pointer tx_remove points to the next Packet to remove
 *************************************************************************/
#ifndef INKERNEL
#define src_unit     u2.s2.unit
#define src_port     u2.s2.port
#define dest_unit    u1.s1.unit
#define dest_port    u1.s1.port
#endif
#ifdef HOST
#define tx_start     u3.s1.tx_start_ptr_ptr
#define tx_add       u3.s1.tx_add_ptr_ptr
#define tx_end       u3.s1.tx_end_ptr_ptr
#define tx_remove    u3.s1.tx_remove_ptr_ptr
#define rx_start     u4.s1.rx_start_ptr_ptr
#define rx_add       u4.s1.rx_add_ptr_ptr
#define rx_end       u4.s1.rx_end_ptr_ptr
#define rx_remove    u4.s1.rx_remove_ptr_ptr
#endif
typedef struct PHB PHB;
struct PHB {
#ifdef RTA
	ushort port;
#endif
#ifdef INKERNEL
	WORD source;
#else
	union {
		ushort source;	/* Complete source */
		struct {
			unsigned char unit;	/* Source unit */
			unsigned char port;	/* Source port */
		} s2;
	} u2;
#endif
	WORD handshake;
	WORD status;
	NUMBER timeout;		/* Maximum of 1.9 seconds */
	WORD link;		/* Send down this link */
#ifdef INKERNEL
	WORD destination;
#else
	union {
		ushort destination;	/* Complete destination */
		struct {
			unsigned char unit;	/* Destination unit */
			unsigned char port;	/* Destination port */
		} s1;
	} u1;
#endif
#ifdef RTA
	ushort tx_pkts_added;
	ushort tx_pkts_removed;
	Q_BUF_ptr tx_q_start;	/* Start of the Q list chain */
	short num_tx_q_bufs;	/* Number of Q buffers in the chain */
	PKT_ptr_ptr tx_add;	/* Add a new Packet here */
	Q_BUF_ptr tx_add_qb;	/* Pointer to the add Q buf */
	PKT_ptr_ptr tx_add_st_qbb;	/* Pointer to start of the Q's buf */
	PKT_ptr_ptr tx_add_end_qbb;	/* Pointer to the end of the Q's buf */
	PKT_ptr_ptr tx_remove;	/* Remove a Packet here */
	Q_BUF_ptr tx_remove_qb;	/* Pointer to the remove Q buf */
	PKT_ptr_ptr tx_remove_st_qbb;	/* Pointer to the start of the Q buf */
	PKT_ptr_ptr tx_remove_end_qbb;	/* Pointer to the end of the Q buf */
#endif
#ifdef INKERNEL
	PKT_ptr_ptr tx_start;
	PKT_ptr_ptr tx_end;
	PKT_ptr_ptr tx_add;
	PKT_ptr_ptr tx_remove;
#endif
#ifdef HOST
	union {
		struct {
			PKT_ptr_ptr tx_start_ptr_ptr;
			PKT_ptr_ptr tx_end_ptr_ptr;
			PKT_ptr_ptr tx_add_ptr_ptr;
			PKT_ptr_ptr tx_remove_ptr_ptr;
		} s1;
		struct {
			ushort *tx_start_ptr;
			ushort *tx_end_ptr;
			ushort *tx_add_ptr;
			ushort *tx_remove_ptr;
		} s2;
	} u3;
#endif

#ifdef  RTA
	ushort rx_pkts_added;
	ushort rx_pkts_removed;
	Q_BUF_ptr rx_q_start;	/* Start of the Q list chain */
	short num_rx_q_bufs;	/* Number of Q buffers in the chain */
	PKT_ptr_ptr rx_add;	/* Add a new Packet here */
	Q_BUF_ptr rx_add_qb;	/* Pointer to the add Q buf */
	PKT_ptr_ptr rx_add_st_qbb;	/* Pointer to start of the Q's buf */
	PKT_ptr_ptr rx_add_end_qbb;	/* Pointer to the end of the Q's buf */
	PKT_ptr_ptr rx_remove;	/* Remove a Packet here */
	Q_BUF_ptr rx_remove_qb;	/* Pointer to the remove Q buf */
	PKT_ptr_ptr rx_remove_st_qbb;	/* Pointer to the start of the Q buf */
	PKT_ptr_ptr rx_remove_end_qbb;	/* Pointer to the end of the Q buf */
#endif
#ifdef INKERNEL
	PKT_ptr_ptr rx_start;
	PKT_ptr_ptr rx_end;
	PKT_ptr_ptr rx_add;
	PKT_ptr_ptr rx_remove;
#endif
#ifdef HOST
	union {
		struct {
			PKT_ptr_ptr rx_start_ptr_ptr;
			PKT_ptr_ptr rx_end_ptr_ptr;
			PKT_ptr_ptr rx_add_ptr_ptr;
			PKT_ptr_ptr rx_remove_ptr_ptr;
		} s1;
		struct {
			ushort *rx_start_ptr;
			ushort *rx_end_ptr;
			ushort *rx_add_ptr;
			ushort *rx_remove_ptr;
		} s2;
	} u4;
#endif

#ifdef RTA			/* some fields for the remotes */
	ushort flush_count;	/* Count of write flushes */
	ushort txmode;		/* Modes for tx */
	ushort rxmode;		/* Modes for rx */
	ushort portmode;	/* Generic modes */
	ushort column;		/* TAB3 column count */
	ushort tx_subscript;	/* (TX) Subscript into data field */
	ushort rx_subscript;	/* (RX) Subscript into data field */
	PKT_ptr rx_incomplete;	/* Hold an incomplete packet here */
	ushort modem_bits;	/* Modem bits to mask */
	ushort lastModem;	/* Modem control lines. */
	ushort addr;		/* Address for sub commands */
	ushort MonitorTstate;	/* TRUE if monitoring tstop */
#endif

};

#endif

/*********** end of file ***********/