/*- * 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. 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: @(#)ns16550.h 7.1 (Berkeley) 5/9/91 * $FreeBSD: src/sys/dev/ic/ns16550.h,v 1.14 2003/09/16 14:21:17 bde Exp $ * $DragonFly: src/sys/dev/serial/ic_layer/ns16550.h,v 1.4 2005/09/01 00:18:24 swildner Exp $ */ /* * NS8250... UART registers. */ /* 8250 registers #[0-6]. */ #define com_data 0 /* data register (R/W) */ #define com_thr com_data /* transmitter holding register (W) */ #define com_rhr com_data /* receiver holding register (R) */ #define com_ier 1 /* interrupt enable register (W) */ #define IER_ERXRDY 0x1 #define IER_ETXRDY 0x2 #define IER_ERLS 0x4 #define IER_EMSC 0x8 #define com_iir 2 /* interrupt identification register (R) */ #define com_isr com_iir /* interrupt status register (R) */ #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 */ #define com_lcr 3 /* line control register (R/W) */ #define com_lctl com_lcr #define com_cfcr com_lcr /* character format control register (R/W) */ #define LCR_DLAB 0x80 #define CFCR_DLAB LCR_DLAB #define LCR_EFR_ENABLE 0xbf /* magic to enable EFR on 16650 up */ #define CFCR_EFR_ENABLE LCR_EFR_ENABLE #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 #define com_mcr 4 /* modem control register (R/W) */ #define MCR_PRESCALE 0x80 /* only available on 16650 up */ #define MCR_LOOPBACK 0x10 #define MCR_IENABLE 0x08 #define MCR_DRS 0x04 #define MCR_RTS 0x02 #define MCR_DTR 0x01 #define com_lsr 5 /* line status register (R/W) */ #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 #define com_msr 6 /* modem status register (R/W) */ #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 /* 8250 multiplexed registers #[0-1]. Access enabled by LCR[7]. */ #define com_dll 0 /* divisor latch low (R/W) */ #define com_dlbl com_dll #define com_dlm 1 /* divisor latch high (R/W) */ #define com_dlbh com_dlm /* 16450 register #7. Not multiplexed. */ #define com_scr 7 /* scratch register (R/W) */ /* 16550 register #2. Not multiplexed. */ #define com_fcr 2 /* FIFO control register (W) */ #define com_fifo com_fcr #define FIFO_ENABLE 0x01 #define FIFO_RCV_RST 0x02 #define FIFO_XMT_RST 0x04 #define FIFO_DMA_MODE 0x08 #define FIFO_RX_LOW 0x00 #define FIFO_RX_MEDL 0x40 #define FIFO_RX_MEDH 0x80 #define FIFO_RX_HIGH 0xc0 /* 16650 registers #2,[4-7]. Access enabled by LCR_EFR_ENABLE. */ #define com_efr 2 /* enhanced features register (R/W) */ #define EFR_AUTOCTS 0x80 #define EFR_AUTORTS 0x40 #define EFR_EFE 0x10 /* enhanced functions enable */ #define com_xon1 4 /* XON 1 character (R/W) */ #define com_xon2 5 /* XON 2 character (R/W) */ #define com_xoff1 6 /* XOFF 1 character (R/W) */ #define com_xoff2 7 /* XOFF 2 character (R/W) */ /* 16950 register #1. Access enabled by ACR[7]. Also requires !LCR[7]. */ #define com_asr 1 /* additional status register (R[0-7]/W[0-1]) */ /* 16950 register #3. R/W access enabled by ACR[7]. */ #define com_rfl 3 /* receiver fifo level (R) */ /* * 16950 register #4. Access enabled by ACR[7]. Also requires * !LCR_EFR_ENABLE. */ #define com_tfl 4 /* transmitter fifo level (R) */ /* * 16950 register #5. Accessible if !LCR_EFR_ENABLE. Read access also * requires ACR[6]. */ #define com_icr 5 /* index control register (R/W) */ /* * 16950 register #7. It is the same as com_scr except it has a different * abbreviation in the manufacturer's data sheet and it also serves as an * index into the Indexed Control register set. */ #define com_spr com_scr /* scratch pad (and index) register (R/W) */ /* * 16950 indexed control registers #[0-0x13]. Access is via index in SPR, * data in ICR (if ICR is accessible). */ #define com_acr 0 /* additional control register (R/W) */ #define ACR_ASE 0x80 /* ASR/RFL/TFL enable */ #define ACR_ICRE 0x40 /* ICR enable */ #define ACR_TLE 0x20 /* TTL/RTL enable */ #define com_cpr 1 /* clock prescaler register (R/W) */ #define com_tcr 2 /* times clock register (R/W) */ #define com_ttl 4 /* transmitter trigger level (R/W) */ #define com_rtl 5 /* receiver trigger level (R/W) */ /* ... */
