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/* $OpenBSD: dlreg.h,v 1.2 1998/05/11 14:59:06 niklas Exp $ */
/* $NetBSD: dlreg.h,v 1.1 1997/02/04 19:13:19 ragge Exp $ */
/*
* Copyright (c) 1997 Ben Harris. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ben Harris.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* dlreg.h -- Definitions for the DL11 and DLV11 serial cards.
*
* Style in imitation of dzreg.h.
*/
union w_b
{
u_short word;
struct {
u_char byte_lo;
u_char byte_hi;
} bytes;
};
struct DLregs
{
volatile u_short dl_rcsr; /* Receive Control/Status Register (R/W) */
volatile u_short dl_rbuf; /* Receive Buffer (R) */
volatile u_short dl_xcsr; /* Transmit Control/Status Register (R/W) */
volatile union w_b u_xbuf; /* Transmit Buffer (W) */
#define dl_xbuf u_xbuf.bytes.byte_lo
};
typedef struct DLregs dlregs;
/* RCSR bits */
#define DL_RCSR_RX_DONE 0x0080 /* Receiver Done (R) */
#define DL_RCSR_RXIE 0x0040 /* Receiver Interrupt Enable (R/W) */
#define DL_RCSR_READER_ENABLE 0x0001 /* [paper-tape] Reader Enable (W) */
#define DL_RCSR_BITS "\20\1READER_ENABLE\7RXIE\10RX_DONE\n"
/* RBUF bits */
#define DL_RBUF_ERR 0x8000 /* Error (R) */
#define DL_RBUF_OVERRUN_ERR 0x4000 /* Overrun Error (R) */
#define DL_RBUF_FRAMING_ERR 0x2000 /* Framing Error (R) */
#define DL_RBUF_PARITY_ERR 0x1000 /* Parity Error (R) */
#define DL_RBUF_DATA_MASK 0x00FF /* Receive Data (R) */
#define DL_RBUF_BITS "\20\15PARITY_ERR\16FRAMING_ERR\17OVERRUN_ERR\20ERR\n"
/* XCSR bits */
#define DL_XCSR_TX_READY 0x0080 /* Transmitter Ready (R) */
#define DL_XCSR_TXIE 0x0040 /* Transmit Interrupt Enable (R/W) */
#define DL_XCSR_TX_BREAK 0x0001 /* Transmit Break (R/W) */
#define DL_XCSR_BITS "\20\1TX_BREAK\7TXIE\10TX_READY\n"
/* XBUF is just data byte right justified. */
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