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/*- * 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. * 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. * * $FreeBSD: release/9.1.0/sys/dev/ic/i8251.h 182835 2008-09-07 04:35:04Z nyan $ */ /* * modified for PC9801 by M.Ishii * Kyoto University Microcomputer Club (KMC) * * modified for 8251(FIFO) by Seigo TANIMURA <tanimura@FreeBSD.org> */ /* i8251 mode register */ #define MOD8251_5BITS 0x00 #define MOD8251_6BITS 0x04 #define MOD8251_7BITS 0x08 #define MOD8251_8BITS 0x0c #define MOD8251_PENAB 0x10 /* parity enable */ #define MOD8251_PEVEN 0x20 /* parity even */ #define MOD8251_STOP1 0x40 /* 1 stop bit */ #define MOD8251_STOP15 0x80 /* 1.5 stop bit */ #define MOD8251_STOP2 0xc0 /* 2 stop bit */ #define MOD8251_CLKx1 0x01 /* x1 */ #define MOD8251_CLKx16 0x02 /* x16 */ #define MOD8251_CLKx64 0x03 /* x64 */ /* i8251 command register */ #define CMD8251_TxEN 0x01 /* transmit enable */ #define CMD8251_DTR 0x02 /* assert DTR */ #define CMD8251_RxEN 0x04 /* receive enable */ #define CMD8251_SBRK 0x08 /* send break */ #define CMD8251_ER 0x10 /* error reset */ #define CMD8251_RTS 0x20 /* assert RTS */ #define CMD8251_RESET 0x40 /* internal reset */ #define CMD8251_EH 0x80 /* enter hunt mode */ /* i8251 status register */ #define STS8251_TxRDY 0x01 /* transmit READY */ #define STS8251_RxRDY 0x02 /* data exists in receive buffer */ #define STS8251_TxEMP 0x04 /* transmit buffer EMPTY */ #define STS8251_PE 0x08 /* perity error */ #define STS8251_OE 0x10 /* overrun error */ #define STS8251_FE 0x20 /* framing error */ #define STS8251_BI 0x40 /* break detect */ #define STS8251_DSR 0x80 /* DSR is asserted */ /* i8251F line status register */ #define FLSR_TxEMP 0x01 /* transmit buffer EMPTY */ #define FLSR_TxRDY 0x02 /* transmit READY */ #define FLSR_RxRDY 0x04 /* data exists in receive buffer */ #define FLSR_OE 0x10 /* overrun error */ #define FLSR_PE 0x20 /* perity error */ #define FLSR_BI 0x80 /* break detect */ /* i8251F modem status register */ #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 */ /* i8251F interrupt identification register */ #define IIR_FIFO_CK1 0x40 #define IIR_FIFO_CK2 0x20 #define IIR_IMASK 0x0f #define IIR_RXTOUT 0x0c /* Receiver timeout */ #define IIR_RLS 0x06 /* Line status change */ #define IIR_RXRDY 0x04 /* Receiver ready */ #define IIR_TXRDY 0x02 /* Transmitter ready */ #define IIR_NOPEND 0x01 /* Transmitter ready */ #define IIR_MLSC 0x00 /* Modem status */ /* i8251F 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_LSR_EN 0x08 #define FIFO_MSR_EN 0x10 #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 */