z8530var.h revision 1.7 
1/*	$OpenBSD: z8530var.h,v 1.7 2005/12/28 22:39:52 miod 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. 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 <machine/bus.h>
45#include <sparc64/dev/z8530sc.h>
46
47struct zsc_softc {
48	struct device		zsc_dev;	/* base device */
49	bus_space_tag_t		zsc_bustag;	/* bus space/dma tags */
50	bus_dma_tag_t		zsc_dmatag;
51	struct zs_chanstate	*zsc_cs[2];	/* channel A and B soft state */
52
53	/* Machine-dependent part follows... */
54	void			*zsc_softintr;
55	int			zsc_promunit;	/* PROM's view of zs devices */
56	int			zsc_node;	/* PROM node, if any */
57	struct zs_chanstate	zsc_cs_store[2];
58};
59
60/*
61 * Functions to read and write individual registers in a channel.
62 * The ZS chip requires a 1.6 uSec. recovery time between accesses.
63 * On the SparcStation the recovery time is handled in hardware.
64 * On the older Sun4 machine it isn't, and software must do it.
65 *
66 * However, it *is* a problem on some Sun4m's (i.e. the SS20) (XXX: why?).
67 * Thus we leave in the delay (done in the functions below).
68 * XXX: (ABB) Think about this more.
69 *
70 * The functions below could be macros instead if we are concerned
71 * about the function call overhead where ZS_DELAY does nothing.
72 */
73
74u_char zs_read_reg(struct zs_chanstate *cs, u_char reg);
75u_char zs_read_csr(struct zs_chanstate *cs);
76u_char zs_read_data(struct zs_chanstate *cs);
77
78void  zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val);
79void  zs_write_csr(struct zs_chanstate *cs, u_char val);
80void  zs_write_data(struct zs_chanstate *cs, u_char val);
81
82/* The sparc has splzs() in psl.h */
83
84/* We want to call it "zs" instead of "zsc" (sigh). */
85#ifndef ZSCCF_CHANNEL
86#define ZSCCF_CHANNEL 0
87#define ZSCCF_CHANNEL_DEFAULT -1
88#endif
89