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      1 /*	$NetBSD: ns16550.h,v 1.1 2007/12/17 19:09:53 garbled Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1995-1997 Gary Thomas (gdt (at) 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 	volatile unsigned char rbr;  /* 0 */
     39 	volatile unsigned char ier;  /* 1 */
     40 	volatile unsigned char fcr;  /* 2 */
     41 	volatile unsigned char lcr;  /* 3 */
     42 	volatile unsigned char mcr;  /* 4 */
     43 	volatile unsigned char lsr;  /* 5 */
     44 	volatile unsigned char msr;  /* 6 */
     45 	volatile unsigned char scr;  /* 7 */
     46 };
     47 
     48 #define thr rbr
     49 #define iir fcr
     50 #define dll rbr
     51 #define dlm ier
     52 
     53 #define LSR_DR   0x01  /* Data ready */
     54 #define LSR_OE   0x02  /* Overrun */
     55 #define LSR_PE   0x04  /* Parity error */
     56 #define LSR_FE   0x08  /* Framing error */
     57 #define LSR_BI   0x10  /* Break */
     58 #define LSR_THRE 0x20  /* Xmit holding register empty */
     59 #define LSR_TEMT 0x40  /* Xmitter empty */
     60 #define LSR_ERR  0x80  /* Error */
     61 
     62 #define COMBASE	0xe0000000	/* SR14 */
     63 #define	COM1	0x30
     64 #define	COM2	0x38
     65 
     66 extern volatile struct NS16550 *NS16550_init(int, int);
     67 extern void NS16550_putc(volatile struct NS16550 *, int);
     68 extern int NS16550_getc(volatile struct NS16550 *);
     69 extern int NS16550_scankbd(volatile struct NS16550 *);
     70 extern int NS16550_test(volatile struct NS16550 *);
     71