1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * This software was developed by SRI International and the University of
8 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
9 * ("CTSRD"), as part of the DARPA CRASH research programme.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#include <sys/param.h>
37#include <sys/bus.h>
38#include <sys/condvar.h>
39#include <sys/conf.h>
40#include <sys/bio.h>
41#include <sys/kernel.h>
42#include <sys/lock.h>
43#include <sys/malloc.h>
44#include <sys/module.h>
45#include <sys/mutex.h>
46#include <sys/rman.h>
47#include <sys/systm.h>
48
49#include <machine/bus.h>
50#include <machine/resource.h>
51
52#include <dev/terasic/de4led/terasic_de4led.h>
53
54/*
55 * Nexus bus attachment for the 8-element LED on the Terasic DE-4 FPGA board,
56 * which is hooked up to the processor via a memory-mapped Avalon bus.
57 */
58static int
59terasic_de4led_nexus_probe(device_t dev)
60{
61
62	device_set_desc(dev, "Terasic DE4 8-element LED");
63	return (BUS_PROBE_NOWILDCARD);
64}
65
66static int
67terasic_de4led_nexus_attach(device_t dev)
68{
69	struct terasic_de4led_softc *sc;
70
71	sc = device_get_softc(dev);
72	sc->tdl_dev = dev;
73	sc->tdl_unit = device_get_unit(dev);
74	sc->tdl_rid = 0;
75	sc->tdl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
76	    &sc->tdl_rid, RF_ACTIVE);
77	if (sc->tdl_res == NULL) {
78		device_printf(dev, "couldn't map memory\n");
79		return (ENXIO);
80	}
81	terasic_de4led_attach(sc);
82	return (0);
83}
84
85static int
86terasic_de4led_nexus_detach(device_t dev)
87{
88	struct terasic_de4led_softc *sc;
89
90	sc = device_get_softc(dev);
91	KASSERT(sc->tdl_res != NULL, ("%s: resources not allocated",
92	    __func__));
93	terasic_de4led_detach(sc);
94	bus_release_resource(dev, SYS_RES_MEMORY, sc->tdl_rid, sc->tdl_res);
95	return (0);
96}
97
98static device_method_t terasic_de4led_nexus_methods[] = {
99	DEVMETHOD(device_probe,		terasic_de4led_nexus_probe),
100	DEVMETHOD(device_attach,	terasic_de4led_nexus_attach),
101	DEVMETHOD(device_detach,	terasic_de4led_nexus_detach),
102	{ 0, 0 }
103};
104
105static driver_t terasic_de4led_nexus_driver = {
106	"terasic_de4led",
107	terasic_de4led_nexus_methods,
108	sizeof(struct terasic_de4led_softc),
109};
110
111DRIVER_MODULE(terasic_de4led, nexus, terasic_de4led_nexus_driver,
112    terasic_de4led_devclass, 0, 0);
113