1/*-
2 * Copyright (c) 2012 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34#include <sys/param.h>
35#include <sys/bus.h>
36#include <sys/condvar.h>
37#include <sys/conf.h>
38#include <sys/bio.h>
39#include <sys/kernel.h>
40#include <sys/lock.h>
41#include <sys/malloc.h>
42#include <sys/module.h>
43#include <sys/mutex.h>
44#include <sys/rman.h>
45#include <sys/systm.h>
46
47#include <machine/bus.h>
48#include <machine/resource.h>
49
50#include <dev/fdt/fdt_common.h>
51#include <dev/ofw/openfirm.h>
52#include <dev/ofw/ofw_bus.h>
53#include <dev/ofw/ofw_bus_subr.h>
54
55#include <dev/terasic/de4led/terasic_de4led.h>
56
57/*
58 * Nexus bus attachment for the 8-element LED on the Terasic DE-4 FPGA board,
59 * which is hooked up to the processor via a memory-mapped Avalon bus.
60 */
61static int
62terasic_de4led_fdt_probe(device_t dev)
63{
64
65	if (!ofw_bus_status_okay(dev))
66		return (ENXIO);
67
68	if (ofw_bus_is_compatible(dev, "sri-cambridge,de4led")) {
69		device_set_desc(dev, "Terasic DE4 8-element LED");
70		return (BUS_PROBE_DEFAULT);
71	}
72	return (ENXIO);
73}
74
75static int
76terasic_de4led_fdt_attach(device_t dev)
77{
78	struct terasic_de4led_softc *sc;
79
80	sc = device_get_softc(dev);
81	sc->tdl_dev = dev;
82	sc->tdl_unit = device_get_unit(dev);
83	sc->tdl_rid = 0;
84	sc->tdl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
85	    &sc->tdl_rid, RF_ACTIVE);
86	if (sc->tdl_res == NULL) {
87		device_printf(dev, "couldn't map memory\n");
88		return (ENXIO);
89	}
90	terasic_de4led_attach(sc);
91	return (0);
92}
93
94static int
95terasic_de4led_fdt_detach(device_t dev)
96{
97	struct terasic_de4led_softc *sc;
98
99	sc = device_get_softc(dev);
100	KASSERT(sc->tdl_res != NULL, ("%s: resources not allocated",
101	    __func__));
102	terasic_de4led_detach(sc);
103	bus_release_resource(dev, SYS_RES_MEMORY, sc->tdl_rid, sc->tdl_res);
104	return (0);
105}
106
107static device_method_t terasic_de4led_fdt_methods[] = {
108	DEVMETHOD(device_probe,		terasic_de4led_fdt_probe),
109	DEVMETHOD(device_attach,	terasic_de4led_fdt_attach),
110	DEVMETHOD(device_detach,	terasic_de4led_fdt_detach),
111	{ 0, 0 }
112};
113
114static driver_t terasic_de4led_fdt_driver = {
115	"terasic_de4led",
116	terasic_de4led_fdt_methods,
117	sizeof(struct terasic_de4led_softc),
118};
119
120DRIVER_MODULE(terasic_de4led, simplebus, terasic_de4led_fdt_driver,
121    terasic_de4led_devclass, 0, 0);
122