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Annotation of sys/arch/mvme68k/dev/scc.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: scc.h,v 1.5 2003/06/02 05:09:14 deraadt Exp $ */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1995 Theo de Raadt
        !             5:  * Copyright (c) 1993 Paul Mackerras.
        !             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:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            18:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            19:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            20:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            21:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            22:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            23:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            24:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            25:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            26:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            27:  */
        !            28: /*
        !            29:  * SCC I/O register definitions
        !            30:  */
        !            31:
        !            32: #define PCLK_FREQ_147  5000000
        !            33: #define PCLK_FREQ_162  10000000
        !            34:
        !            35: /*
        !            36:  * physical layout in memory of the SCC chips on the MVME147
        !            37:  */
        !            38: struct scc_147 {
        !            39:        u_char cr;
        !            40:        u_char dr;
        !            41: };
        !            42:
        !            43: /*
        !            44:  * physical layout in memory of the SCC chips on the MVME162
        !            45:  * (and possibly the MVME172 as well?)
        !            46:  */
        !            47: struct scc_162 {
        !            48:        u_char xx1;
        !            49:        u_char cr;
        !            50:        u_char xx2;
        !            51:        u_char dr;
        !            52: };
        !            53:
        !            54: struct sccregs {
        !            55:        volatile u_char *s_cr;
        !            56:        volatile u_char *s_dr;
        !            57:        u_char s_val[16];
        !            58: };
        !            59:
        !            60: int mc_rev1_bug = 0;
        !            61:
        !            62: #define ZREAD0(scc)    ((*((scc)->s_cr)))
        !            63: #define ZREAD(scc, n)  ((*((scc)->s_cr)) = n, (*((scc)->s_cr)))
        !            64: #if 1
        !            65: #define ZREADD(scc)    mc_rev1_bug ? (ZWRITE0((scc), 8), ZREAD0((scc))) : ((*((scc)->s_dr)))
        !            66: #else
        !            67: #define ZREADD(scc)    ((*((scc)->s_dr)))
        !            68: #endif
        !            69:
        !            70: #define ZWRITE0(scc, v)        ((*((scc)->s_cr)) = (u_char)(v))
        !            71: #define ZWRITE(scc, n, v) (ZWRITE0(scc, (u_char)n), \
        !            72:            ZWRITE0(scc, (scc)->s_val[n] = (u_char)(v)))
        !            73: #if 1
        !            74: #define ZWRITED(scc, v)        mc_rev1_bug ? ((ZWRITE0((scc), 8), ZWRITE0((scc), (u_char)(v)))) : \
        !            75:         (((*((scc)->s_dr)) = (u_char)(v)))
        !            76: #else
        !            77: #define ZWRITED(scc, v)        ((*((scc)->s_dr)) = (u_char)(v))
        !            78: #endif
        !            79:
        !            80: #define ZBIS(scc, n, v)        (ZWRITE(scc, n, (scc)->s_val[n] | (v)))
        !            81: #define ZBIC(scc, n, v)        (ZWRITE(scc, n, (scc)->s_val[n] & ~(v)))
        !            82:
        !            83: #define SCC_RXFULL     1       /* bits in rr0 */
        !            84: #define SCC_TXRDY      4
        !            85: #define SCC_DCD                8
        !            86: #define SCC_CTS                0x20
        !            87:
        !            88: #define SCC_RCVEN      1       /* bits in wr3 */
        !            89:
        !            90: #define SCC_RTS                2       /* bits in wr5 */
        !            91: #define SCC_DTR                0x80