121 lines
4.2 KiB
C
121 lines
4.2 KiB
C
/* drvBitBusInterface.h */
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/* share/src/drv $Id$ */
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/*
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* Author: John Winans
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* Date: 09-10-91
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* XVME-402 BitBus driver
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*
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* Experimental Physics and Industrial Control System (EPICS)
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*
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* Copyright 1991, the Regents of the University of California,
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* and the University of Chicago Board of Governors.
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*
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* This software was produced under U.S. Government contracts:
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* (W-7405-ENG-36) at the Los Alamos National Laboratory,
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* and (W-31-109-ENG-38) at Argonne National Laboratory.
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*
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* Initial development by:
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* The Controls and Automation Group (AT-8)
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* Ground Test Accelerator
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* Accelerator Technology Division
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* Los Alamos National Laboratory
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*
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* Co-developed with
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* The Controls and Computing Group
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* Accelerator Systems Division
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* Advanced Photon Source
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* Argonne National Laboratory
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*
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* Modification Log:
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* -----------------
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* .01 09-30-91 jrw Written
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* .02 12-10-91 jrw moved some stuff over to drvBitBusInterface.h
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*/
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/******************************************************************************
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* Memory Map of XVME-402 BITBUS CARD
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*
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* This board is rather stupid in that it wastes a whole Kilo of space
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* for its 5 1-byte regs. So the dm* fields in the structure below are
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* for those filler locations.
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*
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*****************************************************************************/
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struct xvmeRegs {
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unsigned char dm0;
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unsigned char stat_ctl;
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unsigned char dm2;
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unsigned char int_vec;
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unsigned char dm4;
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unsigned char data;
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unsigned char dm6;
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unsigned char cmnd;
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unsigned char dm8;
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unsigned char fifo_stat;
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unsigned char dmA[1014]; /* Board occupies 1024 bytes in memory*/
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};
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#define RESET_POLL_TIME 10 /* time to sleep when waiting on a link abort */
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#define BB_SEND_CMD 0x0 /* command to initiate sending of msg */
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#define XVME_ENABLE_INT 0x08 /* Allow xvme interupts */
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#define XVME_TX_INT 0x20 /* int enable TX only */
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#define XVME_TX_PEND 0x10 /* transmit interrupt currently pending */
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#define XVME_RX_INT 0x80 /* int exable RX only */
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#define XVME_RX_PEND 0x40 /* receive interrupt currently pending */
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#define XVME_NO_INT 0 /* disable all interrupts */
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/******************************************************************************
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*
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* Fifo status register format
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*
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* +----+----+----+----+----+----+----+----+
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* | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Bits
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* +----+----+----+----+----+----+----+----+
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* "1" "1" RCMD RFNE "1" "1" "1" TFNF data
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*
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* RCMD = "1"= command received ( end of message )
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* "0"= No command
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*
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* RFNE = "1" = Receive Fifo Not Empty
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* "0" = Receive Fifo empty
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*
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* TFNF = "1" = Transmit Fifo Not Full
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* "0" = transmit fifo full
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*
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* NOTE:
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* A write to bit 7 of the Fifo status register can be used to reset the
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* xvme board.
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*
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*****************************************************************************/
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#define XVME_RCMD 0x20 /* Command has been received */
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#define XVME_RFNE 0x10 /* Receive Fifo is Not Empty */
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#define XVME_TFNF 0x01 /* Transmit FIFO is Not Full */
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#define XVME_FSVALID 0x31 /* these are the only valid status bits */
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#define XVME_FSIDLE 0x01 /* fifo_stat & FSVALID = 0x1 when it is idle */
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#define XVME_RESET 0x80 /* Write this and you reset the XVME card */
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/******************************************************************************
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*
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* The xvmeLink structure holds all the xvme-card specific data required
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* for the operation of the link.
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*
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******************************************************************************/
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struct xvmeLink {
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WDOG_ID watchDogId; /* watchdog for timeouts */
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SEM_ID watchDogSem; /* set by the watch dog int handler */
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unsigned char abortFlag; /* set to 1 if link is being reset by the dog */
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unsigned char txAbortAck; /* set to 1 by txTask to ack abort Sequence */
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unsigned char rxAbortAck; /* set to 1 by rxTask to ack abort Sequence */
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struct xvmeRegs *bbRegs;/* pointer to board registers */
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SEM_ID rxInt; /* given when rx interrupts occur */
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struct bbLink *pbbLink;
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};
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