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/* $OpenBSD: comreg.h,v 1.8 1998/02/23 11:41:25 downsj Exp $ */
/* $NetBSD: comreg.h,v 1.8 1996/02/05 23:01:50 scottr Exp $ */
/*-
* 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.
*
* @(#)comreg.h 7.2 (Berkeley) 5/9/91
*/
#include <dev/ic/ns16550reg.h>
#ifndef COM_FREQ /* allow to be set externally */
#define COM_FREQ 1843200 /* 16-bit baud rate divisor */
#endif
#define COM_TOLERANCE 30 /* baud rate tolerance, in 0.1% units */
/* interrupt enable register */
#define IER_ERXRDY 0x1 /* Enable receiver interrupt */
#define IER_ETXRDY 0x2 /* Enable transmitter empty interrupt */
#define IER_ERLS 0x4 /* Enable line status interrupt */
#define IER_EMSC 0x8 /* Enable modem status interrupt */
#define IER_SLEEP 0x10 /* Enable sleep mode */
/* interrupt identification register */
#define IIR_IMASK 0xf
#define IIR_RXTOUT 0xc
#define IIR_RLS 0x6 /* Line status change */
#define IIR_RXRDY 0x4 /* Receiver ready */
#define IIR_TXRDY 0x2 /* Transmitter ready */
#define IIR_MLSC 0x0 /* Modem status */
#define IIR_NOPEND 0x1 /* No pending interrupts */
#define IIR_FIFO_MASK 0xc0 /* set if FIFOs are enabled */
/* fifo control register */
#define FIFO_ENABLE 0x01 /* Turn the FIFO on */
#define FIFO_RCV_RST 0x02 /* Reset RX FIFO */
#define FIFO_XMT_RST 0x04 /* Reset TX FIFO */
#define FIFO_DMA_MODE 0x08
#define FIFO_TRIGGER_1 0x00 /* Trigger RXRDY intr on 1 character */
#define FIFO_TRIGGER_4 0x40 /* ibid 4 */
#define FIFO_TRIGGER_8 0x80 /* ibid 8 */
#define FIFO_TRIGGER_14 0xc0 /* ibid 14 */
/* ST16650 fifo control register */
#define FIFO_RCV_TRIGGER_8 0x00
#define FIFO_RCV_TRIGGER_16 0x40
#define FIFO_RCV_TRIGGER_24 0x80
#define FIFO_RCV_TRIGGER_28 0xc0
#define FIFO_XMT_TRIGGER_16 0x00
#define FIFO_XMT_TRIGGER_8 0x10
#define FIFO_XMT_TRIGGER_24 0x20
#define FIFO_XMT_TRIGGER_30 0x30
/* TI16750 fifo control register */
#define FIFO_ENABLE_64BYTE 0x20
/* line control register */
#define LCR_DLAB 0x80 /* Divisor latch access enable */
#define LCR_SBREAK 0x40 /* Break Control */
#define LCR_PZERO 0x38 /* Space parity */
#define LCR_PONE 0x28 /* Mark parity */
#define LCR_PEVEN 0x18 /* Even parity */
#define LCR_PODD 0x08 /* Odd parity */
#define LCR_PNONE 0x00 /* No parity */
#define LCR_PENAB 0x08 /* XXX - low order bit of all parity */
#define LCR_STOPB 0x04 /* 2 stop bits per serial word */
#define LCR_8BITS 0x03 /* 8 bits per serial word */
#define LCR_7BITS 0x02 /* 7 bits */
#define LCR_6BITS 0x01 /* 6 bits */
#define LCR_5BITS 0x00 /* 5 bits */
/* modem control register */
#define MCR_LOOPBACK 0x10 /* Loop test: echos from TX to RX */
#define MCR_IENABLE 0x08 /* Out2: enables UART interrupts */
#define MCR_DRS 0x04 /* Out1: resets some internal modems */
#define MCR_RTS 0x02 /* Request To Send */
#define MCR_DTR 0x01 /* Data Terminal Ready */
/* line status register */
#define LSR_RCV_FIFO 0x80
#define LSR_TSRE 0x40 /* Transmitter empty: byte sent */
#define LSR_TXRDY 0x20 /* Transmitter buffer empty */
#define LSR_BI 0x10 /* Break detected */
#define LSR_FE 0x08 /* Framing error: bad stop bit */
#define LSR_PE 0x04 /* Parity error */
#define LSR_OE 0x02 /* Overrun, lost incoming byte */
#define LSR_RXRDY 0x01 /* Byte ready in Receive Buffer */
#define LSR_RCV_MASK 0x1f /* Mask for incoming data or error */
/* modem status register */
/* All deltas are from the last read of the MSR. */
#define MSR_DCD 0x80 /* Current Data Carrier Detect */
#define MSR_RI 0x40 /* Current Ring Indicator */
#define MSR_DSR 0x20 /* Current Data Set Ready */
#define MSR_CTS 0x10 /* Current Clear to Send */
#define MSR_DDCD 0x08 /* DCD has changed state */
#define MSR_TERI 0x04 /* RI has toggled low to high */
#define MSR_DDSR 0x02 /* DSR has changed state */
#define MSR_DCTS 0x01 /* CTS has changed state */
/* enhanced features register */
#define EFR_ECB 0x10 /* enhanced control bit */
#define EFR_SCD 0x20 /* special character detect */
#define EFR_RTS 0x40 /* RTS flow control */
#define EFR_CTS 0x80 /* CTS flow control */
#define COM_NPORTS 8
/*
* WARNING: Serial console is assumed to be at COM1 address
* and CONUNIT must be 0.
*/
#ifndef CONADDR
#define CONADDR (0x3f8)
#endif
#ifndef CONUNIT
#define CONUNIT (0)
#endif
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