1 /* $NetBSD: nappi_nr.c,v 1.11 2012/10/27 17:17:48 chs 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 *
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: nappi_nr.c,v 1.11 2012/10/27 17:17:48 chs Exp $");
34
35 /*
36 * LED support for NAPPI.
37 */
38
39 #include <sys/param.h>
40 #include <sys/types.h>
41 #include <sys/callout.h>
42 #include <sys/device.h>
43 #include <sys/kernel.h>
44 #include <sys/systm.h>
45
46 #include <sys/bus.h>
47
48 #include <arm/ixp12x0/ixpsipvar.h>
49
50 static int nappinr_match(device_t, cfdata_t, void *);
51 static void nappinr_attach(device_t, device_t, void *);
52 #if 0
53 static int nappinr_activate(device_t, enum devact);
54 #endif
55 static void nappinr_callout(void *);
56
57 struct nappinr_softc {
58 bus_space_tag_t sc_iot;
59 bus_space_handle_t sc_ioh;
60 bus_addr_t sc_baseaddr;
61 bus_space_handle_t sc_pos;
62 struct callout sc_co;
63 };
64
65 CFATTACH_DECL_NEW(nappinr, sizeof(struct nappinr_softc),
66 nappinr_match, nappinr_attach, NULL, NULL);
67
68 static int
nappinr_match(device_t parent,cfdata_t match,void * aux)69 nappinr_match(device_t parent, cfdata_t match, void *aux)
70 {
71 return (1);
72 }
73
74 static void
nappinr_attach(device_t parent,device_t self,void * aux)75 nappinr_attach(device_t parent, device_t self, void *aux)
76 {
77 struct nappinr_softc* sc = device_private(self);
78 struct ixpsip_attach_args* sa = aux;
79
80 printf("\n");
81
82 sc->sc_iot = sa->sa_iot;
83 sc->sc_baseaddr = sa->sa_addr;
84
85 if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0,
86 &sc->sc_ioh)) {
87 printf("%s: unable to map registers\n", device_xname(self));
88 return;
89 }
90
91 callout_init(&sc->sc_co, 0);
92 callout_reset(&sc->sc_co, hz / 10, nappinr_callout, sc);
93 }
94
95 #if 0
96 static int
97 nappinr_activate(device_t self, enum devact act)
98 {
99 printf("nappinr_activate act=%d\n", act);
100 return 0;
101 }
102 #endif
103
104 static void
nappinr_callout(void * arg)105 nappinr_callout(void *arg)
106 {
107 static const int ptn[] = { 1, 2, 4, 8, 4, 2 };
108 struct nappinr_softc *sc = arg;
109 uint32_t v;
110
111 v = ptn[sc->sc_pos++ % 6];
112 v |= ptn[sc->sc_pos++ % 6] << 4;
113 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 0, v);
114 callout_reset(&sc->sc_co, hz / 10, nappinr_callout, sc);
115 }
116