LXR linux/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#define MAX_RUP          ((short) 16)
  41#define PKTS_PER_RUP     ((short) 2)    /* They are always used in pairs */
  42
  43/*************************************************
  44 * Define all the  packet request stuff
  45 ************************************************/
  46#define TX_RUP_INACTIVE          0      /* Nothing to transmit */
  47#define TX_PACKET_READY          1      /* Transmit packet ready */
  48#define TX_LOCK_RUP              2      /* Transmit side locked */
  49
  50#define RX_RUP_INACTIVE          0      /* Nothing received */
  51#define RX_PACKET_READY          1      /* Packet received */
  52
  53#define RUP_NO_OWNER             0xff   /* RUP not owned by any process */
  54
  55struct RUP {
  56        u16 txpkt;              /* Outgoing packet */
  57        u16 rxpkt;              /* Incoming packet */
  58        u16 link;               /* Which link to send down? */
  59        u8 rup_dest_unit[2];    /* Destination unit */
  60        u16 handshake;          /* For handshaking */
  61        u16 timeout;            /* Timeout */
  62        u16 status;             /* Status */
  63        u16 txcontrol;          /* Transmit control */
  64        u16 rxcontrol;          /* Receive control */
  65};
  66
  67#endif
  68
  69/*********** end of file ***********/
  70