altera_avgen_nexus.c revision 265999
1132718Skan/*- 290075Sobrien * Copyright (c) 2012-2013 Robert N. M. Watson 390075Sobrien * All rights reserved. 490075Sobrien * 590075Sobrien * This software was developed by SRI International and the University of 690075Sobrien * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7132718Skan * ("CTSRD"), as part of the DARPA CRASH research programme. 890075Sobrien * 9117395Skan * Redistribution and use in source and binary forms, with or without 10117395Skan * modification, are permitted provided that the following conditions 11117395Skan * are met: 12117395Skan * 1. Redistributions of source code must retain the above copyright 13117395Skan * notice, this list of conditions and the following disclaimer. 1490075Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1590075Sobrien * notice, this list of conditions and the following disclaimer in the 1690075Sobrien * documentation and/or other materials provided with the distribution. 1790075Sobrien * 1890075Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1990075Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2090075Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2190075Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2290075Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2390075Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2490075Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2590075Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2690075Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2790075Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2890075Sobrien * SUCH DAMAGE. 2990075Sobrien */ 3090075Sobrien 3190075Sobrien#include <sys/cdefs.h> 3290075Sobrien__FBSDID("$FreeBSD: stable/10/sys/dev/altera/avgen/altera_avgen_nexus.c 265999 2014-05-14 01:35:43Z ian $"); 3390075Sobrien 3490075Sobrien#include <sys/param.h> 35132718Skan#include <sys/bus.h> 36132718Skan#include <sys/condvar.h> 3790075Sobrien#include <sys/conf.h> 3890075Sobrien#include <sys/kernel.h> 3990075Sobrien#include <sys/lock.h> 4090075Sobrien#include <sys/malloc.h> 41132718Skan#include <sys/module.h> 42132718Skan#include <sys/mutex.h> 43132718Skan#include <sys/rman.h> 44132718Skan#include <sys/stat.h> 45132718Skan#include <sys/systm.h> 46132718Skan#include <sys/uio.h> 47132718Skan 48132718Skan#include <machine/bus.h> 49132718Skan#include <machine/resource.h> 50132718Skan#include <machine/vm.h> 51132718Skan 52132718Skan#include <vm/vm.h> 53132718Skan 5490075Sobrien#include <dev/altera/avgen/altera_avgen.h> 55 56static int 57altera_avgen_nexus_probe(device_t dev) 58{ 59 60 device_set_desc(dev, "Generic Altera Avalon device attachment"); 61 return (BUS_PROBE_NOWILDCARD); 62} 63 64static int 65altera_avgen_nexus_attach(device_t dev) 66{ 67 struct altera_avgen_softc *sc; 68 const char *str_fileio, *str_mmapio; 69 const char *str_devname; 70 int devunit, error; 71 72 sc = device_get_softc(dev); 73 sc->avg_dev = dev; 74 sc->avg_unit = device_get_unit(dev); 75 76 /* 77 * Query non-standard hints to find out what operations are permitted 78 * on the device, and whether it is cached. 79 */ 80 str_fileio = NULL; 81 str_mmapio = NULL; 82 str_devname = NULL; 83 devunit = -1; 84 sc->avg_width = 1; 85 error = resource_int_value(device_get_name(dev), device_get_unit(dev), 86 ALTERA_AVALON_STR_WIDTH, &sc->avg_width); 87 if (error != 0 && error != ENOENT) { 88 device_printf(dev, "invalid %s\n", ALTERA_AVALON_STR_WIDTH); 89 return (error); 90 } 91 (void)resource_string_value(device_get_name(dev), 92 device_get_unit(dev), ALTERA_AVALON_STR_FILEIO, &str_fileio); 93 (void)resource_string_value(device_get_name(dev), 94 device_get_unit(dev), ALTERA_AVALON_STR_MMAPIO, &str_mmapio); 95 (void)resource_string_value(device_get_name(dev), 96 device_get_unit(dev), ALTERA_AVALON_STR_DEVNAME, &str_devname); 97 (void)resource_int_value(device_get_name(dev), device_get_unit(dev), 98 ALTERA_AVALON_STR_DEVUNIT, &devunit); 99 100 /* Memory allocation and checking. */ 101 sc->avg_rid = 0; 102 sc->avg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 103 &sc->avg_rid, RF_ACTIVE); 104 if (sc->avg_res == NULL) { 105 device_printf(dev, "couldn't map memory\n"); 106 return (ENXIO); 107 } 108 error = altera_avgen_attach(sc, str_fileio, str_mmapio, str_devname, 109 devunit); 110 if (error != 0) 111 bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid, 112 sc->avg_res); 113 return (error); 114} 115 116static int 117altera_avgen_nexus_detach(device_t dev) 118{ 119 struct altera_avgen_softc *sc; 120 121 sc = device_get_softc(dev); 122 altera_avgen_detach(sc); 123 bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid, sc->avg_res); 124 return (0); 125} 126 127static device_method_t altera_avgen_nexus_methods[] = { 128 DEVMETHOD(device_probe, altera_avgen_nexus_probe), 129 DEVMETHOD(device_attach, altera_avgen_nexus_attach), 130 DEVMETHOD(device_detach, altera_avgen_nexus_detach), 131 { 0, 0 } 132}; 133 134static driver_t altera_avgen_nexus_driver = { 135 "altera_avgen", 136 altera_avgen_nexus_methods, 137 sizeof(struct altera_avgen_softc), 138}; 139 140DRIVER_MODULE(avgen, nexus, altera_avgen_nexus_driver, altera_avgen_devclass, 141 0, 0); 142