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      1 /*	$NetBSD: ns16550reg.h,v 1.14 2022/10/06 19:59:55 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1991 The Regents of the University of California.
      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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)ns16550.h	7.1 (Berkeley) 5/9/91
     32  */
     33 
     34 #ifndef	_SYS_DEV_IC_NS16550REG_H_
     35 #define	_SYS_DEV_IC_NS16550REG_H_
     36 
     37 /*
     38  * NS16550 UART registers
     39  */
     40 
     41 #define	com_data	0	/* data register (R/W) */
     42 #define	com_dlbl	0	/* divisor latch low (W) */
     43 #define	com_dlbh	1	/* divisor latch high (W) */
     44 #define	com_ier		1	/* interrupt enable (W) */
     45 #define	com_iir		2	/* interrupt identification (R) */
     46 #define	com_fifo	2	/* FIFO control (W) */
     47 #define	com_lctl	3	/* line control register (R/W) */
     48 #define	com_cfcr	3	/* line control register (R/W) */
     49 #define	com_lcr		com_cfcr
     50 #define	com_mcr		4	/* modem control register (R/W) */
     51 #define	com_lsr		5	/* line status register (R/W) */
     52 #define	com_msr		6	/* modem status register (R/W) */
     53 #define	com_scratch	7	/* scratch register (R/W) */
     54 
     55 /*
     56  * Additional registers present on TI OMAP hardware
     57  */
     58 #define	com_mdr1	8	/* mode definition register 1 (OMAP) */
     59 
     60 /*
     61  * Additional register present in NS16750
     62  */
     63 #define com_usr		31	/* status register (R) (16750/SUNXI) */
     64 
     65 /*
     66  * Additional registers present on Allwinner hardware
     67  */
     68 #define	com_tfl		32	/* transmit fifo level (R) (SUNXI) */
     69 #define	com_rfl		33	/* receive fifo level (R) (SUNXI) */
     70 #define	com_halt	41	/* halt tx (R/W) (SUNXI) */
     71 
     72 #endif	/* _SYS_DEV_IC_NS16550REG_H_ */
     73