drivers/char/rio/rup.h

   1 /****************************************************************************
   2  *******                                                              *******
   3  *******               R U P   S T R U C T U R E
   4  *******                                                              *******
   5  ****************************************************************************
   6
   7  Author  : Ian Nandhra
   8  Date    :
   9
  10  *
  11  *  (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
  12  *
  13  *      This program is free software; you can redistribute it and/or modify
  14  *      it under the terms of the GNU General Public License as published by
  15  *      the Free Software Foundation; either version 2 of the License, or
  16  *      (at your option) any later version.
  17  *
  18  *      This program is distributed in the hope that it will be useful,
  19  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *      GNU General Public License for more details.
  22  *
  23  *      You should have received a copy of the GNU General Public License
  24  *      along with this program; if not, write to the Free Software
  25  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26
  27  Version : 0.01
  28
  29
  30                             Mods
  31  ----------------------------------------------------------------------------
  32   Date     By                Description
  33  ----------------------------------------------------------------------------
  34
  35  ***************************************************************************/
  36
  37 #ifndef _rup_h
  38 #define _rup_h 1
  39
  40 #ifdef SCCS_LABELS
  41 #ifndef lint
  42 /* static char *_rio_rup_h_sccs = "@(#)rup.h    1.5"; */
  43 #endif
  44 #endif
  45
  46 #define MAX_RUP          ((short) 16)
  47
  48 #define PKTS_PER_RUP     ((short) 2)    /* They are always used in pairs */
  49
  50 /*************************************************
  51  * Define all the  packet request stuff
  52  ************************************************/
  53 #define TX_RUP_INACTIVE          0      /* Nothing to transmit */
  54 #define TX_PACKET_READY          1      /* Transmit packet ready */
  55 #define TX_LOCK_RUP              2      /* Transmit side locked */
  56
  57 #define RX_RUP_INACTIVE          0      /* Nothing received */
  58 #define RX_PACKET_READY          1      /* Packet received */
  59
  60 #define RUP_NO_OWNER             0xff   /* RUP not owned by any process */
  61
  62 struct RUP {
  63         PKT_ptr txpkt;          /* Outgoing packet */
  64         PKT_ptr rxpkt;          /* Incoming packet */
  65         WORD link;              /* Which link to send down? */
  66         BYTE rup_dest_unit[2];  /* Destination unit */
  67         WORD handshake;         /* For handshaking */
  68         WORD timeout;           /* Timeout */
  69         WORD status;            /* Status */
  70         WORD txcontrol;         /* Transmit control */
  71         WORD rxcontrol;         /* Receive control */
  72 };
  73
  74 #endif
  75
  76 /*********** end of file ***********/