altera_sdcard_nexus.c revision 331722 
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: stable/11/sys/dev/altera/sdcard/altera_sdcard_nexus.c 331722 2018-03-29 02:50:57Z eadler $");
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#include <sys/taskqueue.h>
47
48#include <machine/bus.h>
49#include <machine/resource.h>
50
51#include <geom/geom_disk.h>
52
53#include <dev/altera/sdcard/altera_sdcard.h>
54
55/*
56 * Nexus bus attachment for the Altera SD Card IP core.  Appropriate for most
57 * Altera FPGA SoC-style configurations in which the IP core will be exposed
58 * to the processor via a memory-mapped Avalon bus.
59 */
60static int
61altera_sdcard_nexus_probe(device_t dev)
62{
63
64	device_set_desc(dev, "Altera Secure Data Card IP Core");
65	return (BUS_PROBE_NOWILDCARD);
66}
67
68static int
69altera_sdcard_nexus_attach(device_t dev)
70{
71	struct altera_sdcard_softc *sc;
72
73	sc = device_get_softc(dev);
74	sc->as_dev = dev;
75	sc->as_unit = device_get_unit(dev);
76	sc->as_rid = 0;
77	sc->as_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
78	    &sc->as_rid, RF_ACTIVE);
79	if (sc->as_res == NULL) {
80		device_printf(dev, "couldn't map memory\n");
81		return (ENXIO);
82	}
83	altera_sdcard_attach(sc);
84	return (0);
85}
86
87static int
88altera_sdcard_nexus_detach(device_t dev)
89{
90	struct altera_sdcard_softc *sc;
91
92	sc = device_get_softc(dev);
93	KASSERT(sc->as_res != NULL, ("%s: resources not allocated",
94	    __func__));
95	altera_sdcard_detach(sc);
96	bus_release_resource(dev, SYS_RES_MEMORY, sc->as_rid, sc->as_res);
97	return (0);
98}
99
100static device_method_t altera_sdcard_nexus_methods[] = {
101	DEVMETHOD(device_probe,		altera_sdcard_nexus_probe),
102	DEVMETHOD(device_attach,	altera_sdcard_nexus_attach),
103	DEVMETHOD(device_detach,	altera_sdcard_nexus_detach),
104	{ 0, 0 }
105};
106
107static driver_t altera_sdcard_nexus_driver = {
108	"altera_sdcardc",
109	altera_sdcard_nexus_methods,
110	sizeof(struct altera_sdcard_softc),
111};
112
113DRIVER_MODULE(altera_sdcard, nexus, altera_sdcard_nexus_driver,
114    altera_sdcard_devclass, 0, 0);
115