1/*	$NetBSD: dma_obio.c,v 1.13 2023/12/20 05:33:18 thorpej Exp $ */
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Paul Kranenburg.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: dma_obio.c,v 1.13 2023/12/20 05:33:18 thorpej Exp $");
34
35#include <sys/types.h>
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/kernel.h>
39#include <sys/errno.h>
40#include <sys/device.h>
41
42#include <sys/bus.h>
43#include <machine/autoconf.h>
44#include <machine/cpu.h>
45
46#include <dev/sbus/sbusvar.h>
47
48#include <dev/ic/lsi64854reg.h>
49#include <dev/ic/lsi64854var.h>
50
51int	dmamatch_obio(device_t, cfdata_t, void *);
52void	dmaattach_obio(device_t, device_t, void *);
53
54CFATTACH_DECL_NEW(dma_obio, sizeof(struct lsi64854_softc),
55    dmamatch_obio, dmaattach_obio, NULL, NULL);
56
57int
58dmamatch_obio(device_t parent, cfdata_t cf, void *aux)
59{
60	union obio_attach_args *uoba = aux;
61	struct obio4_attach_args *oba;
62
63	if (uoba->uoba_isobio4 == 0)
64		return 0;
65
66	oba = &uoba->uoba_oba4;
67	return bus_space_probe(oba->oba_bustag, oba->oba_paddr,
68				4,	/* probe size */
69				0,	/* offset */
70				0,	/* flags */
71				NULL, NULL);
72}
73
74
75void
76dmaattach_obio(device_t parent, device_t self, void *aux)
77{
78	struct lsi64854_softc *sc = device_private(self);
79	union obio_attach_args *uoba = aux;
80	struct obio4_attach_args *oba = &uoba->uoba_oba4;
81
82	sc->sc_dev = self;
83	sc->sc_bustag = oba->oba_bustag;
84	sc->sc_dmatag = oba->oba_dmatag;
85
86	if (bus_space_map(oba->oba_bustag, oba->oba_paddr,
87			  4 * sizeof(uint32_t),
88			  0, &sc->sc_regs) != 0) {
89		aprint_error(": cannot map registers\n");
90		return;
91	}
92
93	/* Any point in setting `sc_burst' to anything here? */
94	sc->sc_channel = L64854_CHANNEL_SCSI;
95	lsi64854_attach(sc);
96}
97