1 /* $NetBSD: ns16550.h,v 1.1 2000/02/29 15:21:50 nonaka Exp $ */ 2 3 /*- 4 * Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org) 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Gary Thomas. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * NS16550 Serial Port 35 */ 36 37 struct NS16550 38 { 39 volatile unsigned char rbr; /* 0 */ 40 volatile unsigned char ier; /* 1 */ 41 volatile unsigned char fcr; /* 2 */ 42 volatile unsigned char lcr; /* 3 */ 43 volatile unsigned char mcr; /* 4 */ 44 volatile unsigned char lsr; /* 5 */ 45 volatile unsigned char msr; /* 6 */ 46 volatile unsigned char scr; /* 7 */ 47 }; 48 49 #define thr rbr 50 #define iir fcr 51 #define dll rbr 52 #define dlm ier 53 54 #define LSR_DR 0x01 /* Data ready */ 55 #define LSR_OE 0x02 /* Overrun */ 56 #define LSR_PE 0x04 /* Parity error */ 57 #define LSR_FE 0x08 /* Framing error */ 58 #define LSR_BI 0x10 /* Break */ 59 #define LSR_THRE 0x20 /* Xmit holding register empty */ 60 #define LSR_TEMT 0x40 /* Xmitter empty */ 61 #define LSR_ERR 0x80 /* Error */ 62 63 #define COMBASE 0x80000000 64 #define COM1 0x3F8 65 #define COM2 0x2F8 66 #define COM3 0x380 67 #define COM4 0x388 68 69 extern volatile struct NS16550 *NS16550_init __P((int, int)); 70 extern void NS16550_putc __P((volatile struct NS16550 *, int)); 71 extern int NS16550_getc __P((volatile struct NS16550 *)); 72 extern int NS16550_scankbd __P((volatile struct NS16550 *)); 73 extern int NS16550_test __P((volatile struct NS16550 *)); 74