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Annotation of sys/arch/sparc/include/z8530var.h, Revision 1.1.1.1

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