65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
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/* $NetBSD: scc.h,v 1.1.1.1 1995/07/25 23:12:07 chuck Exp $ */
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/*
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* Copyright (c) 1993 Paul Mackerras.
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* All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software withough specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* SCC I/O register definitions
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*/
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#define PCLK_FREQ 8333333 /* XXX */
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struct scc {
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unsigned char cr;
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unsigned char dr;
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};
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struct sccregs {
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volatile struct scc *s_adr;
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unsigned char s_val[16];
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};
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#define ZREAD0(scc) ((scc)->s_adr->cr)
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#define ZREAD(scc, n) ((scc)->s_adr->cr = n, (scc)->s_adr->cr)
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#define ZREADD(scc) ((scc)->s_adr->dr)
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#define ZWRITE0(scc, v) ((scc)->s_adr->cr = v)
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#define ZWRITE(scc, n, v) (ZWRITE0(scc, n), ZWRITE0(scc, (scc)->s_val[n] = v))
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#define ZWRITED(scc, v) ((scc)->s_adr->dr = v)
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#define ZBIS(scc, n, v) (ZWRITE(scc, n, (scc)->s_val[n] | (v)))
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#define ZBIC(scc, n, v) (ZWRITE(scc, n, (scc)->s_val[n] & ~(v)))
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#define SCC_RXFULL 1 /* bits in rr0 */
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#define SCC_TXRDY 4
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#define SCC_DCD 8
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#define SCC_CTS 0x20
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#define SCC_RCVEN 1 /* bits in wr3 */
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#define SCC_RTS 2 /* bits in wr5 */
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#define SCC_DTR 0x80
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