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/terasic/de4led/terasic_de4led.h>
51
52/*
53 * Nexus bus attachment for the 8-element LED on the Terasic DE-4 FPGA board,
54 * which is hooked up to the processor via a memory-mapped Avalon bus.
55 */
56static int
57terasic_de4led_nexus_probe(device_t dev)
58{
59
60	device_set_desc(dev, "Terasic DE4 8-element LED");
61	return (BUS_PROBE_NOWILDCARD);
62}
63
64static int
65terasic_de4led_nexus_attach(device_t dev)
66{
67	struct terasic_de4led_softc *sc;
68
69	sc = device_get_softc(dev);
70	sc->tdl_dev = dev;
71	sc->tdl_unit = device_get_unit(dev);
72	sc->tdl_rid = 0;
73	sc->tdl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
74	    &sc->tdl_rid, RF_ACTIVE);
75	if (sc->tdl_res == NULL) {
76		device_printf(dev, "couldn't map memory\n");
77		return (ENXIO);
78	}
79	terasic_de4led_attach(sc);
80	return (0);
81}
82
83static int
84terasic_de4led_nexus_detach(device_t dev)
85{
86	struct terasic_de4led_softc *sc;
87
88	sc = device_get_softc(dev);
89	KASSERT(sc->tdl_res != NULL, ("%s: resources not allocated",
90	    __func__));
91	terasic_de4led_detach(sc);
92	bus_release_resource(dev, SYS_RES_MEMORY, sc->tdl_rid, sc->tdl_res);
93	return (0);
94}
95
96static device_method_t terasic_de4led_nexus_methods[] = {
97	DEVMETHOD(device_probe,		terasic_de4led_nexus_probe),
98	DEVMETHOD(device_attach,	terasic_de4led_nexus_attach),
99	DEVMETHOD(device_detach,	terasic_de4led_nexus_detach),
100	{ 0, 0 }
101};
102
103static driver_t terasic_de4led_nexus_driver = {
104	"terasic_de4led",
105	terasic_de4led_nexus_methods,
106	sizeof(struct terasic_de4led_softc),
107};
108
109DRIVER_MODULE(terasic_de4led, nexus, terasic_de4led_nexus_driver,
110    terasic_de4led_devclass, 0, 0);
111