sys/i386/isa/comreg.h

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * 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 the University of
 *      California, Berkeley and its contributors.
 * 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.
 *
 *      from: @(#)comreg.h      7.2 (Berkeley) 5/9/91
 *      $Id$
 */


/* 16 bit baud rate divisor (lower byte in dca_data, upper in dca_ier) */
#define COMBRD(x)       (1843200 / (16*(x)))

/* interrupt enable register */
#define IER_ERXRDY      0x1
#define IER_ETXRDY      0x2
#define IER_ERLS        0x4
#define IER_EMSC        0x8

/* interrupt identification register */
#define IIR_IMASK       0xf
#define IIR_RXTOUT      0xc
#define IIR_RLS         0x6
#define IIR_RXRDY       0x4
#define IIR_TXRDY       0x2
#define IIR_NOPEND      0x1
#define IIR_MLSC        0x0
#define IIR_FIFO_MASK   0xc0    /* set if FIFOs are enabled */

/* fifo control register */
#define FIFO_ENABLE     0x01
#define FIFO_RCV_RST    0x02
#define FIFO_XMT_RST    0x04
#define FIFO_DMA_MODE   0x08
#define FIFO_TRIGGER_1  0x00
#define FIFO_TRIGGER_4  0x40
#define FIFO_TRIGGER_8  0x80
#define FIFO_TRIGGER_14 0xc0

/* character format control register */
#define CFCR_DLAB       0x80
#define CFCR_SBREAK     0x40
#define CFCR_PZERO      0x30
#define CFCR_PONE       0x20
#define CFCR_PEVEN      0x10
#define CFCR_PODD       0x00
#define CFCR_PENAB      0x08
#define CFCR_STOPB      0x04
#define CFCR_8BITS      0x03
#define CFCR_7BITS      0x02
#define CFCR_6BITS      0x01
#define CFCR_5BITS      0x00

/* modem control register */
#define MCR_LOOPBACK    0x10
#define MCR_IENABLE     0x08
#define MCR_DRS         0x04
#define MCR_RTS         0x02
#define MCR_DTR         0x01

/* line status register */
#define LSR_RCV_FIFO    0x80
#define LSR_TSRE        0x40
#define LSR_TXRDY       0x20
#define LSR_BI          0x10
#define LSR_FE          0x08
#define LSR_PE          0x04
#define LSR_OE          0x02
#define LSR_RXRDY       0x01
#define LSR_RCV_MASK    0x1f

/* modem status register */
#define MSR_DCD         0x80
#define MSR_RI          0x40
#define MSR_DSR         0x20
#define MSR_CTS         0x10
#define MSR_DDCD        0x08
#define MSR_TERI        0x04
#define MSR_DDSR        0x02
#define MSR_DCTS        0x01

/*
 * WARNING: Serial console is assumed to be at COM1 address
 * and CONUNIT must be 0.
 */
#define CONADDR (0x3f8)
#define CONUNIT (0)