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