xref: /src/sys/arch/mipsco/include/z8530var.h

/*	$NetBSD: z8530var.h,v 1.3.2.1 2002/01/10 19:46:20 thorpej Exp $	*/

/*
 * Copyright (c) 1994 Gordon W. Ross
 * 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. 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, Berkeley and its contributors.
 * 4. 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 <machine/bus.h>
#include <dev/ic/z8530sc.h>

struct zs_channel {
	struct zs_chanstate	cs_zscs; 	/* Required: soft state */
	bus_space_tag_t		cs_bustag;	/* Machine-dependent */
	bus_space_handle_t	cs_regs;
};

struct zsc_softc {
	struct	device		zsc_dev;	/* required: base device */
	struct	zs_chanstate   *zsc_cs[2];	/* channel soft state */
	struct  zs_channel	zsc_cs_store[2];
	/* Machine-dependent part follows... */
	bus_space_tag_t		zsc_bustag;	/* Bus type */
	bus_space_handle_t	zsc_base; 	/* Device base address */
        struct  evcnt		zs_intrcnt; 	/* Interrupt counter */
	void		       *sc_si;		/* Softinterrupt handle */
};

/*
 * Functions to read and write individual registers in a channel.
 * The SCC chip requires 3-4 PCLK cycles recovery time between accesses
 */

u_char zs_read_reg __P((struct zs_chanstate *cs, u_char reg));
u_char zs_read_csr __P((struct zs_chanstate *cs));
u_char zs_read_data __P((struct zs_chanstate *cs));

void  zs_write_reg __P((struct zs_chanstate *cs, u_char reg, u_char val));
void  zs_write_csr __P((struct zs_chanstate *cs, u_char val));
void  zs_write_data __P((struct zs_chanstate *cs, u_char val));

/* Zilog Serial hardware interrupts (level 0) */
#define splzs()		spltty()

#if defined(_KERNEL) && defined(KGDB)
void zs_kgdb_init __P((void));
void zskgdb __P((struct zs_chanstate *));
#endif