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Annotation of sys/arch/sparc/include/z8530var.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: z8530var.h,v 1.3 2004/09/29 07:35:13 miod Exp $       */
        !             2: /*     $NetBSD: z8530var.h,v 1.1 1997/10/18 00:01:30 gwr Exp $ */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1992, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * This software was developed by the Computer Systems Engineering group
        !             9:  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
        !            10:  * contributed to Berkeley.
        !            11:  *
        !            12:  * All advertising materials mentioning features or use of this software
        !            13:  * must display the following acknowledgement:
        !            14:  *     This product includes software developed by the University of
        !            15:  *     California, Lawrence Berkeley Laboratory.
        !            16:  *
        !            17:  * Redistribution and use in source and binary forms, with or without
        !            18:  * modification, are permitted provided that the following conditions
        !            19:  * are met:
        !            20:  * 1. Redistributions of source code must retain the above copyright
        !            21:  *    notice, this list of conditions and the following disclaimer.
        !            22:  * 2. Redistributions in binary form must reproduce the above copyright
        !            23:  *    notice, this list of conditions and the following disclaimer in the
        !            24:  *    documentation and/or other materials provided with the distribution.
        !            25:  * 3. Neither the name of the University nor the names of its contributors
        !            26:  *    may be used to endorse or promote products derived from this software
        !            27:  *    without specific prior written permission.
        !            28:  *
        !            29:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            30:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            31:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            32:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            33:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            34:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            35:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            36:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            37:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            38:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            39:  * SUCH DAMAGE.
        !            40:  *
        !            41:  *     @(#)zsvar.h     8.1 (Berkeley) 6/11/93
        !            42:  */
        !            43:
        !            44: #include <sparc/dev/z8530sc.h>
        !            45:
        !            46: struct zsc_softc {
        !            47:        struct  device zsc_dev;         /* required first: base device */
        !            48:        struct  zs_chanstate zsc_cs[2]; /* channel A and B soft state */
        !            49: };
        !            50:
        !            51: /*
        !            52:  * Functions to read and write individual registers in a channel.
        !            53:  * The ZS chip requires a 1.6 uSec. recovery time between accesses.
        !            54:  * On the SparcStation the recovery time is handled in hardware.
        !            55:  * On the older Sun4 machine it isn't, and software must do it.
        !            56:  *
        !            57:  * However, it *is* a problem on some Sun4m's (i.e. the SS20) (XXX: why?).
        !            58:  * Thus we leave in the delay (done in the functions below).
        !            59:  * XXX: (ABB) Think about this more.
        !            60:  *
        !            61:  * The functions below could be macros instead if we are concerned
        !            62:  * about the function call overhead where ZS_DELAY does nothing.
        !            63:  */
        !            64:
        !            65: u_char zs_read_reg(struct zs_chanstate *cs, u_char reg);
        !            66: u_char zs_read_csr(struct zs_chanstate *cs);
        !            67: u_char zs_read_data(struct zs_chanstate *cs);
        !            68:
        !            69: void  zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val);
        !            70: void  zs_write_csr(struct zs_chanstate *cs, u_char val);
        !            71: void  zs_write_data(struct zs_chanstate *cs, u_char val);
        !            72:
        !            73: /* The sparc has splzs() in psl.h */
        !            74:
        !            75: /* We want to call it "zs" instead of "zsc" (sigh). */
        !            76: #ifndef ZSCCF_CHANNEL
        !            77: #define ZSCCF_CHANNEL 0
        !            78: #define ZSCCF_CHANNEL_DEFAULT -1
        !            79: #endif