z8530var.h revision 1.4 
1/*	$OpenBSD: z8530var.h,v 1.4 2002/03/14 01:26:45 millert Exp $	*/
2/*	$NetBSD: z8530var.h,v 1.4 2000/11/08 23:41:42 eeh 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. All advertising materials mentioning features or use of this software
26 *    must display the following acknowledgement:
27 *	This product includes software developed by the University of
28 *	California, Berkeley and its contributors.
29 * 4. Neither the name of the University nor the names of its contributors
30 *    may be used to endorse or promote products derived from this software
31 *    without specific prior written permission.
32 *
33 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
36 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 * SUCH DAMAGE.
44 *
45 *	@(#)zsvar.h	8.1 (Berkeley) 6/11/93
46 */
47
48#include <machine/bus.h>
49#include <sparc64/dev/z8530sc.h>
50
51/*
52 * Need to override cn_console_dev() for zstty and zskbd.
53 */
54#ifdef cn_isconsole
55#undef cn_isconsole
56#endif
57extern struct consdev *cn_hw;
58extern struct consdev *cn_tab;
59#define cn_isconsole(d)	((d) == cn_tab->cn_dev || (d) == cn_hw->cn_dev)
60
61struct zsc_softc {
62	struct device		zsc_dev;	/* base device */
63	bus_space_tag_t		zsc_bustag;	/* bus space/dma tags */
64	bus_dma_tag_t		zsc_dmatag;
65	struct zs_chanstate	*zsc_cs[2];	/* channel A and B soft state */
66
67	/* Machine-dependent part follows... */
68	void			*zsc_softintr;
69	int			zsc_promunit;	/* PROM's view of zs devices */
70	int			zsc_node;	/* PROM node, if any */
71	struct evcnt		zsc_intrcnt;	/* count interrupts */
72	struct zs_chanstate	zsc_cs_store[2];
73};
74
75/*
76 * Functions to read and write individual registers in a channel.
77 * The ZS chip requires a 1.6 uSec. recovery time between accesses.
78 * On the SparcStation the recovery time is handled in hardware.
79 * On the older Sun4 machine it isn't, and software must do it.
80 *
81 * However, it *is* a problem on some Sun4m's (i.e. the SS20) (XXX: why?).
82 * Thus we leave in the delay (done in the functions below).
83 * XXX: (ABB) Think about this more.
84 *
85 * The functions below could be macros instead if we are concerned
86 * about the function call overhead where ZS_DELAY does nothing.
87 */
88
89u_char zs_read_reg(struct zs_chanstate *cs, u_char reg);
90u_char zs_read_csr(struct zs_chanstate *cs);
91u_char zs_read_data(struct zs_chanstate *cs);
92
93void  zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val);
94void  zs_write_csr(struct zs_chanstate *cs, u_char val);
95void  zs_write_data(struct zs_chanstate *cs, u_char val);
96
97/* The sparc has splzs() in psl.h */
98
99/* We want to call it "zs" instead of "zsc" (sigh). */
100#ifndef ZSCCF_CHANNEL
101#define ZSCCF_CHANNEL 0
102#define ZSCCF_CHANNEL_DEFAULT -1
103#endif
104