1/*	$NetBSD: z8530var.h,v 1.13 2011/07/01 20:59:39 dyoung Exp $	*/
  2
  3/*
  4 * Copyright (c) 1992, 1993
  5 *	The Regents of the University of California.  All rights reserved.
  6 *
  7 * This software was developed by the Computer Systems Engineering group
  8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  9 * contributed to Berkeley.
 10 *
 11 * All advertising materials mentioning features or use of this software
 12 * must display the following acknowledgement:
 13 *	This product includes software developed by the University of
 14 *	California, Lawrence Berkeley Laboratory.
 15 *
 16 * Redistribution and use in source and binary forms, with or without
 17 * modification, are permitted provided that the following conditions
 18 * are met:
 19 * 1. Redistributions of source code must retain the above copyright
 20 *    notice, this list of conditions and the following disclaimer.
 21 * 2. Redistributions in binary form must reproduce the above copyright
 22 *    notice, this list of conditions and the following disclaimer in the
 23 *    documentation and/or other materials provided with the distribution.
 24 * 3. Neither the name of the University nor the names of its contributors
 25 *    may be used to endorse or promote products derived from this software
 26 *    without specific prior written permission.
 27 *
 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 38 * SUCH DAMAGE.
 39 *
 40 *	@(#)zsvar.h	8.1 (Berkeley) 6/11/93
 41 */
 42
 43#include <sys/bus.h>
 44#include <dev/ic/z8530sc.h>
 45
 46#include "kbd.h"	/* NKBD */
 47
 48#if (NKBD > 0)
 49/*
 50 * Need to override cn_console_dev() for zstty and zskbd.
 51 */
 52#ifdef cn_isconsole
 53#undef cn_isconsole
 54#endif
 55extern struct consdev *cn_hw;
 56extern struct consdev *cn_tab;
 57#define cn_isconsole(d)	((d) == cn_tab->cn_dev || (d) == cn_hw->cn_dev)
 58#endif
 59
 60struct zsc_softc {
 61	device_t		zsc_dev;	/* base device */
 62	bus_space_tag_t		zsc_bustag;	/* bus space/DMA tags */
 63	bus_dma_tag_t		zsc_dmatag;
 64	struct zs_chanstate	*zsc_cs[2];	/* channel A and B soft state */
 65
 66	/* Machine-dependent part follows... */
 67	void			*zsc_softintr;
 68	int			zsc_promunit;	/* PROM's view of zs devices */
 69	int			zsc_node;	/* PROM node, if any */
 70	struct evcnt		zsc_intrcnt;	/* count interrupts */
 71	struct zs_chanstate	zsc_cs_store[2];
 72};
 73
 74/*
 75 * Functions to read and write individual registers in a channel.
 76 * The ZS chip requires a 1.6 uSec. recovery time between accesses.
 77 * On the SparcStation the recovery time is handled in hardware.
 78 * On the older Sun4 machine it isn't, and software must do it.
 79 *
 80 * However, it *is* a problem on some Sun4m's (i.e. the SS20) (XXX: why?).
 81 * Thus we leave in the delay (done in the functions below).
 82 * XXX: (ABB) Think about this more.
 83 *
 84 * The functions below could be macros instead if we are concerned
 85 * about the function call overhead where ZS_DELAY does nothing.
 86 */
 87
 88uint8_t zs_read_reg(struct zs_chanstate *cs, uint8_t reg);
 89uint8_t zs_read_csr(struct zs_chanstate *cs);
 90uint8_t zs_read_data(struct zs_chanstate *cs);
 91
 92void  zs_write_reg(struct zs_chanstate *cs, uint8_t reg, uint8_t val);
 93void  zs_write_csr(struct zs_chanstate *cs, uint8_t val);
 94void  zs_write_data(struct zs_chanstate *cs, uint8_t val);
 95
 96/* The sparc has splzs() in psl.h */
 97
 98/* We want to call it "zs" instead of "zsc" (sigh). */
 99#ifndef ZSCCF_CHANNEL
100#define ZSCCF_CHANNEL 0
101#define ZSCCF_CHANNEL_DEFAULT -1
102#endif
103
104#undef cn_trap
105#define cn_trap() zs_abort(NULL)
106
107#define	IPL_ZS	IPL_SERIAL