altera_sdcard_nexus.c revision 239675
1239709Srwatson/*- 2239709Srwatson * Copyright (c) 2012 Robert N. M. Watson 3239709Srwatson * All rights reserved. 4239709Srwatson * 5239709Srwatson * This software was developed by SRI International and the University of 6239709Srwatson * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7239709Srwatson * ("CTSRD"), as part of the DARPA CRASH research programme. 8239709Srwatson * 9239709Srwatson * Redistribution and use in source and binary forms, with or without 10239709Srwatson * modification, are permitted provided that the following conditions 11239709Srwatson * are met: 12239709Srwatson * 1. Redistributions of source code must retain the above copyright 13239709Srwatson * notice, this list of conditions and the following disclaimer. 14239709Srwatson * 2. Redistributions in binary form must reproduce the above copyright 15239709Srwatson * notice, this list of conditions and the following disclaimer in the 16239709Srwatson * documentation and/or other materials provided with the distribution. 17239709Srwatson * 18239709Srwatson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19239709Srwatson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20239709Srwatson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21239709Srwatson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22239709Srwatson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23239709Srwatson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24239709Srwatson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25239709Srwatson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26239709Srwatson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27239709Srwatson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28239709Srwatson * SUCH DAMAGE. 29239709Srwatson */ 30239709Srwatson 31239709Srwatson#include <sys/cdefs.h> 32239709Srwatson__FBSDID("$FreeBSD: head/sys/dev/altera/sdcard/altera_sdcard_nexus.c 239675 2012-08-25 11:19:20Z rwatson $"); 33239709Srwatson 34239709Srwatson#include <sys/param.h> 35239709Srwatson#include <sys/bus.h> 36239709Srwatson#include <sys/condvar.h> 37239709Srwatson#include <sys/conf.h> 38239709Srwatson#include <sys/bio.h> 39239709Srwatson#include <sys/kernel.h> 40239709Srwatson#include <sys/lock.h> 41239709Srwatson#include <sys/malloc.h> 42239709Srwatson#include <sys/module.h> 43239709Srwatson#include <sys/mutex.h> 44239709Srwatson#include <sys/rman.h> 45239709Srwatson#include <sys/systm.h> 46239709Srwatson#include <sys/taskqueue.h> 47239709Srwatson 48239709Srwatson#include <machine/bus.h> 49239709Srwatson#include <machine/resource.h> 50239709Srwatson 51239709Srwatson#include <geom/geom_disk.h> 52239709Srwatson 53239709Srwatson#include <dev/altera/sdcard/altera_sdcard.h> 54239709Srwatson 55239709Srwatson/* 56239709Srwatson * Nexus bus attachment for the Altera SD Card IP core. Appropriate for most 57239709Srwatson * Altera FPGA SoC-style configurations in which the IP core will be exposed 58239709Srwatson * to the processor via a memory-mapped Avalon bus. 59239709Srwatson */ 60239709Srwatsonstatic int 61239709Srwatsonaltera_sdcard_nexus_probe(device_t dev) 62239709Srwatson{ 63239709Srwatson 64239709Srwatson device_set_desc(dev, "Altera Secure Data Card IP Core"); 65239709Srwatson return (BUS_PROBE_DEFAULT); 66239709Srwatson} 67239709Srwatson 68239709Srwatsonstatic int 69239709Srwatsonaltera_sdcard_nexus_attach(device_t dev) 70239709Srwatson{ 71239709Srwatson struct altera_sdcard_softc *sc; 72239709Srwatson 73239709Srwatson sc = device_get_softc(dev); 74239709Srwatson sc->as_dev = dev; 75239709Srwatson sc->as_unit = device_get_unit(dev); 76239709Srwatson sc->as_rid = 0; 77239709Srwatson sc->as_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 78239709Srwatson &sc->as_rid, RF_ACTIVE); 79239709Srwatson if (sc->as_res == NULL) { 80239709Srwatson device_printf(dev, "couldn't map memory\n"); 81239709Srwatson return (ENXIO); 82239709Srwatson } 83239709Srwatson altera_sdcard_attach(sc); 84239709Srwatson return (0); 85239709Srwatson} 86239709Srwatson 87239709Srwatsonstatic int 88239709Srwatsonaltera_sdcard_nexus_detach(device_t dev) 89239709Srwatson{ 90239709Srwatson struct altera_sdcard_softc *sc; 91239709Srwatson 92239709Srwatson sc = device_get_softc(dev); 93239709Srwatson KASSERT(sc->as_res != NULL, ("%s: resources not allocated", 94239709Srwatson __func__)); 95239709Srwatson altera_sdcard_detach(sc); 96239709Srwatson bus_release_resource(dev, SYS_RES_MEMORY, sc->as_rid, sc->as_res); 97239709Srwatson return (0); 98239709Srwatson} 99239709Srwatson 100239709Srwatsonstatic device_method_t altera_sdcard_nexus_methods[] = { 101239709Srwatson DEVMETHOD(device_probe, altera_sdcard_nexus_probe), 102239709Srwatson DEVMETHOD(device_attach, altera_sdcard_nexus_attach), 103239709Srwatson DEVMETHOD(device_detach, altera_sdcard_nexus_detach), 104239709Srwatson { 0, 0 } 105239709Srwatson}; 106239709Srwatson 107239709Srwatsonstatic driver_t altera_sdcard_nexus_driver = { 108239709Srwatson "altera_sdcardc", 109239709Srwatson altera_sdcard_nexus_methods, 110239709Srwatson sizeof(struct altera_sdcard_softc), 111239709Srwatson}; 112239709Srwatson 113static devclass_t altera_sdcard_devclass; 114 115DRIVER_MODULE(altera_sdcard, nexus, altera_sdcard_nexus_driver, 116 altera_sdcard_devclass, 0, 0); 117