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phb.h

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

/*************************************************
 * 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
 ************************************************/
#define MAX_PHB               ((ushort) 128)    /* range 0-127 */

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

struct PHB {
      u8 source;
      u8 handshake;
      u8 status;
      u16 timeout;            /* Maximum of 1.9 seconds */
      u8 link;          /* Send down this link */
      u8 destination;
      u16 tx_start;
      u16 tx_end;
      u16 tx_add;
      u16 tx_remove;

      u16 rx_start;
      u16 rx_end;
      u16 rx_add;
      u16 rx_remove;

};

#endif

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

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