altera_avgen_fdt.c revision 295883 
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_fdt.c 295883 2016-02-22 09:10:23Z skra $");
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
51#include <vm/vm.h>
52
53#include <dev/fdt/fdt_common.h>
54#include <dev/ofw/openfirm.h>
55#include <dev/ofw/ofw_bus.h>
56#include <dev/ofw/ofw_bus_subr.h>
57
58#include <dev/altera/avgen/altera_avgen.h>
59
60static int
61altera_avgen_fdt_probe(device_t dev)
62{
63
64	if (!ofw_bus_status_okay(dev))
65		return (ENXIO);
66
67	if (ofw_bus_is_compatible(dev, "sri-cambridge,avgen")) {
68		device_set_desc(dev, "Generic Altera Avalon device attachment");
69		return (BUS_PROBE_DEFAULT);
70	}
71	return (ENXIO);
72}
73
74static int
75altera_avgen_fdt_attach(device_t dev)
76{
77	struct altera_avgen_softc *sc;
78	char *str_fileio, *str_mmapio;
79	char *str_devname;
80	phandle_t node;
81	pcell_t cell;
82	int devunit, error;
83
84	sc = device_get_softc(dev);
85	sc->avg_dev = dev;
86	sc->avg_unit = device_get_unit(dev);
87
88	/*
89	 * Query driver-specific OpenFirmware properties to determine how to
90	 * expose the device via /dev.
91	 */
92	str_fileio = NULL;
93	str_mmapio = NULL;
94	str_devname = NULL;
95	devunit = -1;
96	sc->avg_width = 1;
97	node = ofw_bus_get_node(dev);
98	if (OF_getprop(node, "sri-cambridge,width", &cell, sizeof(cell)) > 0)
99		sc->avg_width = cell;
100	(void)OF_getprop_alloc(node, "sri-cambridge,fileio", sizeof(char),
101	    (void **)&str_fileio);
102	(void)OF_getprop_alloc(node, "sri-cambridge,mmapio", sizeof(char),
103	    (void **)&str_mmapio);
104	(void)OF_getprop_alloc(node,  "sri-cambridge,devname", sizeof(char),
105	    (void **)&str_devname);
106	if (OF_getprop(node, "sri-cambridge,devunit", &cell, sizeof(cell)) > 0)
107		devunit = cell;
108
109	/* Memory allocation and checking. */
110	sc->avg_rid = 0;
111	sc->avg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
112	    &sc->avg_rid, RF_ACTIVE);
113	if (sc->avg_res == NULL) {
114		device_printf(dev, "couldn't map memory\n");
115		return (ENXIO);
116	}
117	error = altera_avgen_attach(sc, str_fileio, str_mmapio, str_devname,
118	    devunit);
119	if (error != 0)
120		bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid,
121		    sc->avg_res);
122	if (str_fileio != NULL)
123		free(str_fileio, M_OFWPROP);
124	if (str_mmapio != NULL)
125		free(str_mmapio, M_OFWPROP);
126	if (str_devname != NULL)
127		free(str_devname, M_OFWPROP);
128	return (error);
129}
130
131static int
132altera_avgen_fdt_detach(device_t dev)
133{
134	struct altera_avgen_softc *sc;
135
136	sc = device_get_softc(dev);
137	altera_avgen_detach(sc);
138	bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid, sc->avg_res);
139	return (0);
140}
141
142static device_method_t altera_avgen_fdt_methods[] = {
143	DEVMETHOD(device_probe,		altera_avgen_fdt_probe),
144	DEVMETHOD(device_attach,	altera_avgen_fdt_attach),
145	DEVMETHOD(device_detach,	altera_avgen_fdt_detach),
146	{ 0, 0 }
147};
148
149static driver_t altera_avgen_fdt_driver = {
150	"altera_avgen",
151	altera_avgen_fdt_methods,
152	sizeof(struct altera_avgen_softc),
153};
154
155DRIVER_MODULE(avgen, simplebus, altera_avgen_fdt_driver,
156    altera_avgen_devclass, 0, 0);
157