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
  55 struct 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 ***********/