tsdio.c revision 1.6 
1/*	$NetBSD: tsdio.c,v 1.6 2008/04/28 20:23:52 martin Exp $	*/
2
3/*-
4 * Copyright (c) 2005 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jesse Off
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: tsdio.c,v 1.6 2008/04/28 20:23:52 martin Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/device.h>
38
39#include <sys/bus.h>
40#include <sys/intr.h>
41
42#include <dev/isa/isareg.h>
43#include <dev/isa/isavar.h>
44#include <dev/isa/isadmavar.h>
45#include <dev/isa/tsdiovar.h>
46
47int	tsdio_probe(struct device *, struct cfdata *, void *);
48void	tsdio_attach(struct device *, struct device *, void *);
49int	tsdio_search(struct device *, struct cfdata *, const int *, void *);
50int	tsdio_print(void *, const char *);
51
52CFATTACH_DECL(tsdio, sizeof(struct tsdio_softc),
53    tsdio_probe, tsdio_attach, NULL, NULL);
54
55int
56tsdio_probe(parent, cf, aux)
57	struct device *parent;
58	struct cfdata *cf;
59	void *aux;
60{
61	struct isa_attach_args *ia = aux;
62	bus_space_tag_t iot = ia->ia_iot;
63	bus_space_handle_t dioh;
64	int rv = 0, have_io = 0;
65
66	if (ia->ia_nio < 1)
67		return (0);
68	if (ia->ia_nirq < 1)
69		return (0);
70
71	if (ISA_DIRECT_CONFIG(ia))
72		return (0);
73
74	/*
75	 * Disallow wildcarded I/O base.
76	 */
77	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
78		return (0);
79
80	/*
81	 * Map the I/O space.
82	 */
83	if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8,
84	    0, &dioh))
85		goto out;
86	have_io = 1;
87
88	if (bus_space_read_1(ia->ia_iot, dioh, 0) != 0x54) {
89		goto out;
90	}
91
92	rv = 1;
93	ia->ia_nio = 1;
94	ia->ia_io[0].ir_size = 8;
95	ia->ia_niomem = 0;
96	ia->ia_nirq = 0;
97	ia->ia_ndrq = 0;
98
99 out:
100	if (have_io)
101		bus_space_unmap(iot, dioh, 8);
102
103	return (rv);
104}
105
106void
107tsdio_attach(parent, self, aux)
108	struct device *parent, *self;
109	void *aux;
110{
111	struct tsdio_softc *sc = (struct tsdio_softc *) self;
112	struct isa_attach_args *ia = aux;
113
114	sc->sc_iot = ia->ia_iot;
115
116	aprint_normal(": Technologic Systems TS-DIO24\n");
117
118	/*
119	 * Map the device.
120	 */
121	if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 8,
122	    0, &sc->sc_ioh)) {
123		aprint_error_dev(&sc->sc_dev, "unable to map i/o space\n");
124		return;
125	}
126
127	/*
128	 *  Attach sub-devices
129	 */
130	config_search_ia(tsdio_search, self, "tsdio", NULL);
131}
132
133int
134tsdio_search(parent, cf, l, aux)
135	struct device *parent;
136	struct cfdata *cf;
137	const int *l;
138	void *aux;
139{
140	struct tsdio_softc *sc = (struct tsdio_softc *)parent;
141	struct tsdio_attach_args sa;
142
143	sa.ta_iot = sc->sc_iot;
144	sa.ta_ioh = sc->sc_ioh;
145
146	if (config_match(parent, cf, &sa) > 0)
147		config_attach(parent, cf, &sa, tsdio_print);
148
149	return (0);
150}
151
152int
153tsdio_print(aux, name)
154	void *aux;
155	const char *name;
156{
157
158	return (UNCONF);
159}
160