113 lines
4.2 KiB
C
113 lines
4.2 KiB
C
/* $NetBSD: sccvar.h,v 1.6 1999/08/08 01:44:58 ross Exp $ */
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/*
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* Copyright (c) 1991,1990,1989,1994,1995 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell and Rick Macklem.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)sccreg.h 8.1 (Berkeley) 6/10/93
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*/
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/*
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* Definitions for Intel 82530 serial communications chip. Each chip is a
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* dual uart with the A channels used for the keyboard and mouse with the B
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* channel(s) for comm ports with modem control. Since some registers are
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* used for the other channel, the following macros are used to access the
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* register ports.
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*/
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#if 1
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#define alpha_sparse
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#endif
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#define DENSE
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#ifdef alpha_sparse
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#undef DENSE
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#define SPARSE
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#endif
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typedef struct {
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struct {
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volatile u_int scc_command; /* Register select. */
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#ifdef SPARSE
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u_int scc_pad0;
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#endif
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volatile u_int scc_data; /* Rx/Tx buffer */
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#ifdef SPARSE
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u_int scc_pad1;
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#endif
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} scc_channel[2];
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} scc_regmap_t;
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#define scc_get_datum(d, v) \
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do { (v) = ((d) >> 8) & 0xff; alpha_mb(); DELAY(5); } while (0)
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#define scc_set_datum(d, v) \
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do { (d) = (volatile unsigned int)(v) << 8; alpha_mb(); DELAY(5); } while (0)
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/*
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* Minor device numbers for scc. Weird because B channel comes first and
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* the A channels are wired for keyboard/mouse and the B channels for the
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* comm port(s).
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*/
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#define SCCCOMM2_PORT 0x0
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#define SCCMOUSE_PORT 0x1
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#define SCCCOMM3_PORT 0x2
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#define SCCKBD_PORT 0x3
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int alpha_donot_kludge_scc;
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