2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Robert N. M. Watson
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.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
38 #include <sys/condvar.h>
41 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #include <sys/module.h>
45 #include <sys/mutex.h>
47 #include <sys/systm.h>
49 #include <machine/bus.h>
50 #include <machine/resource.h>
52 #include <dev/fdt/fdt_common.h>
53 #include <dev/ofw/openfirm.h>
54 #include <dev/ofw/ofw_bus.h>
55 #include <dev/ofw/ofw_bus_subr.h>
57 #include <dev/terasic/de4led/terasic_de4led.h>
60 * Nexus bus attachment for the 8-element LED on the Terasic DE-4 FPGA board,
61 * which is hooked up to the processor via a memory-mapped Avalon bus.
64 terasic_de4led_fdt_probe(device_t dev)
67 if (!ofw_bus_status_okay(dev))
70 if (ofw_bus_is_compatible(dev, "sri-cambridge,de4led")) {
71 device_set_desc(dev, "Terasic DE4 8-element LED");
72 return (BUS_PROBE_DEFAULT);
78 terasic_de4led_fdt_attach(device_t dev)
80 struct terasic_de4led_softc *sc;
82 sc = device_get_softc(dev);
84 sc->tdl_unit = device_get_unit(dev);
86 sc->tdl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
87 &sc->tdl_rid, RF_ACTIVE);
88 if (sc->tdl_res == NULL) {
89 device_printf(dev, "couldn't map memory\n");
92 terasic_de4led_attach(sc);
97 terasic_de4led_fdt_detach(device_t dev)
99 struct terasic_de4led_softc *sc;
101 sc = device_get_softc(dev);
102 KASSERT(sc->tdl_res != NULL, ("%s: resources not allocated",
104 terasic_de4led_detach(sc);
105 bus_release_resource(dev, SYS_RES_MEMORY, sc->tdl_rid, sc->tdl_res);
109 static device_method_t terasic_de4led_fdt_methods[] = {
110 DEVMETHOD(device_probe, terasic_de4led_fdt_probe),
111 DEVMETHOD(device_attach, terasic_de4led_fdt_attach),
112 DEVMETHOD(device_detach, terasic_de4led_fdt_detach),
116 static driver_t terasic_de4led_fdt_driver = {
118 terasic_de4led_fdt_methods,
119 sizeof(struct terasic_de4led_softc),
122 DRIVER_MODULE(terasic_de4led, simplebus, terasic_de4led_fdt_driver,
123 terasic_de4led_devclass, 0, 0);