altera_avgen_fdt.c revision 245376 
1/*-
2 * Copyright (c) 2012-2013 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/altera/avgen/altera_avgen_nexus.c 245376 2013-01-13 16:43:59Z 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/kernel.h>
39#include <sys/lock.h>
40#include <sys/malloc.h>
41#include <sys/module.h>
42#include <sys/mutex.h>
43#include <sys/rman.h>
44#include <sys/stat.h>
45#include <sys/systm.h>
46#include <sys/uio.h>
47
48#include <machine/bus.h>
49#include <machine/resource.h>
50#include <machine/vm.h>
51
52#include <vm/vm.h>
53
54#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_DEFAULT);
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
140static devclass_t altera_avgen_devclass;
141
142DRIVER_MODULE(avgen, nexus, altera_avgen_nexus_driver, altera_avgen_devclass,
143    0, 0);
144