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Annotation of sys/dev/ic/ns16550reg.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: ns16550reg.h,v 1.5 2003/06/02 23:28:02 millert Exp $  */
                      2: /*     $NetBSD: ns16550reg.h,v 1.4 1994/10/27 04:18:43 cgd Exp $       */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1991 The Regents of the University of California.
                      6:  * All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. Neither the name of the University nor the names of its contributors
                     17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  *
                     32:  *     @(#)ns16550.h   7.1 (Berkeley) 5/9/91
                     33:  */
                     34:
                     35: /*
                     36:  * NS16550 (and above) UART registers
                     37:  */
                     38:
                     39: #define        com_data        0       /* data register (R/W) */
                     40: #define        com_dlbl        0       /* divisor latch low (W) */
                     41: #define        com_dlbh        1       /* divisor latch high (W) */
                     42: #define        com_ier         1       /* interrupt enable (W) */
                     43: #define        com_iir         2       /* interrupt identification (R) */
                     44: #define        com_fifo        2       /* FIFO control (W) */
                     45: #define com_fctl       2       /* extended FIFO control (W) */
                     46: #define com_efr                2       /* extended features register (W) */
                     47: #define        com_lctl        3       /* line control register (R/W) */
                     48: #define        com_cfcr        3       /* line control register (R/W) */
                     49: #define        com_mcr         4       /* modem control register (R/W) */
                     50: #define        com_lsr         5       /* line status register (R/W) */
                     51: #define        com_msr         6       /* modem status register (R/W) */
                     52: #define com_scratch    7       /* scratch register (R/W) */