terasic_de4led_fdt.c revision 245379
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: head/sys/dev/terasic/de4led/terasic_de4led_fdt.c 245379 2013-01-13 16:53:31Z rwatson $"); 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_is_compatible(dev, "sri-cambridge,de4led")) { 66 device_set_desc(dev, "Terasic DE4 8-element LED"); 67 return (BUS_PROBE_DEFAULT); 68 } 69 return (ENXIO); 70} 71 72static int 73terasic_de4led_fdt_attach(device_t dev) 74{ 75 struct terasic_de4led_softc *sc; 76 77 sc = device_get_softc(dev); 78 sc->tdl_dev = dev; 79 sc->tdl_unit = device_get_unit(dev); 80 sc->tdl_rid = 0; 81 sc->tdl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 82 &sc->tdl_rid, RF_ACTIVE); 83 if (sc->tdl_res == NULL) { 84 device_printf(dev, "couldn't map memory\n"); 85 return (ENXIO); 86 } 87 terasic_de4led_attach(sc); 88 return (0); 89} 90 91static int 92terasic_de4led_fdt_detach(device_t dev) 93{ 94 struct terasic_de4led_softc *sc; 95 96 sc = device_get_softc(dev); 97 KASSERT(sc->tdl_res != NULL, ("%s: resources not allocated", 98 __func__)); 99 terasic_de4led_detach(sc); 100 bus_release_resource(dev, SYS_RES_MEMORY, sc->tdl_rid, sc->tdl_res); 101 return (0); 102} 103 104static device_method_t terasic_de4led_fdt_methods[] = { 105 DEVMETHOD(device_probe, terasic_de4led_fdt_probe), 106 DEVMETHOD(device_attach, terasic_de4led_fdt_attach), 107 DEVMETHOD(device_detach, terasic_de4led_fdt_detach), 108 { 0, 0 } 109}; 110 111static driver_t terasic_de4led_fdt_driver = { 112 "terasic_de4led", 113 terasic_de4led_fdt_methods, 114 sizeof(struct terasic_de4led_softc), 115}; 116 117static devclass_t terasic_de4led_devclass; 118 119DRIVER_MODULE(terasic_de4led, simplebus, terasic_de4led_fdt_driver, 120 terasic_de4led_devclass, 0, 0); 121