nappi_nr.c revision 1.3 
1/* $NetBSD: nappi_nr.c,v 1.3 2002/10/02 05:10:36 thorpej Exp $ */
2
3/*
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Ichiro FUKUHARA and Naoto Shimazaki.
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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * LED support for NAPPI.
41 */
42
43#include <sys/param.h>
44#include <sys/types.h>
45#include <sys/callout.h>
46#include <sys/device.h>
47#include <sys/kernel.h>
48#include <sys/systm.h>
49
50#include <machine/bus.h>
51
52#include <arm/ixp12x0/ixpsipvar.h>
53
54static int	nappinr_match(struct device *, struct cfdata *, void *);
55static void	nappinr_attach(struct device *, struct device *, void *);
56#if 0
57static int	nappinr_activate(struct device *, enum devact);
58#endif
59static void	nappinr_callout(void *);
60
61struct nappinr_softc {
62	struct device		sc_dev;
63	bus_space_tag_t		sc_iot;
64	bus_space_handle_t	sc_ioh;
65	bus_addr_t		sc_baseaddr;
66	bus_space_handle_t	sc_pos;
67	struct callout		sc_co;
68};
69
70CFATTACH_DECL(nappinr, sizeof(struct nappinr_softc),
71    nappinr_match, nappinr_attach, NULL, NULL);
72
73static int
74nappinr_match(struct device *parent, struct cfdata *match, void *aux)
75{
76	return (1);
77}
78
79static void
80nappinr_attach(struct device *parent, struct device *self, void *aux)
81{
82	struct nappinr_softc*		sc = (struct nappinr_softc*) self;
83	struct ixpsip_attach_args*	sa = aux;
84
85	printf("\n");
86
87  	sc->sc_iot = sa->sa_iot;
88  	sc->sc_baseaddr = sa->sa_addr;
89
90	if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0,
91			 &sc->sc_ioh)) {
92		printf("%s: unable to map registers\n", self->dv_xname);
93		return;
94	}
95
96	callout_init(&sc->sc_co);
97	callout_reset(&sc->sc_co, hz / 10, nappinr_callout, sc);
98}
99
100#if 0
101static int
102nappinr_activate(struct device *self, enum devact act)
103{
104	printf("nappinr_activate act=%d\n", act);
105	return 0;
106}
107#endif
108
109static void
110nappinr_callout(void *arg)
111{
112	static const int	ptn[] = { 1, 2, 4, 8, 4, 2 };
113	struct nappinr_softc*	sc = arg;
114
115	bus_space_write_4(sc->sc_iot, sc->sc_ioh, 0, ptn[sc->sc_pos++ % 6]);
116	callout_reset(&sc->sc_co, hz / 10, nappinr_callout, sc);
117}
118