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