altera_avgen_fdt.c revision 245378 
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 245378 2013-01-13 16:51:57Z 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/fdt/fdt_common.h>
55#include <dev/ofw/openfirm.h>
56#include <dev/ofw/ofw_bus.h>
57#include <dev/ofw/ofw_bus_subr.h>
58
59#include <dev/altera/avgen/altera_avgen.h>
60
61static int
62altera_avgen_fdt_probe(device_t dev)
63{
64
65	if (ofw_bus_is_compatible(dev, "sri-cambridge,avgen")) {
66		device_set_desc(dev, "Generic Altera Avalon device attachment");
67		return (BUS_PROBE_DEFAULT);
68	}
69	return (ENXIO);
70}
71
72static int
73altera_avgen_fdt_attach(device_t dev)
74{
75	struct altera_avgen_softc *sc;
76	char *str_fileio, *str_mmapio;
77	char *str_devname;
78	phandle_t node;
79	pcell_t cell;
80	int devunit, error;
81
82	sc = device_get_softc(dev);
83	sc->avg_dev = dev;
84	sc->avg_unit = device_get_unit(dev);
85
86	/*
87	 * Query driver-specific OpenFirmware properties to determine how to
88	 * expose the device via /dev.
89	 */
90	str_fileio = NULL;
91	str_mmapio = NULL;
92	str_devname = NULL;
93	devunit = -1;
94	sc->avg_width = 1;
95	node = ofw_bus_get_node(dev);
96	if (OF_getprop(node, "sri-cambridge,width", &cell, sizeof(cell)) > 0)
97		sc->avg_width = cell;
98	(void)OF_getprop_alloc(node, "sri-cambridge,fileio", sizeof(char),
99	    (void **)&str_fileio);
100	(void)OF_getprop_alloc(node, "sri-cambridge,mmapio", sizeof(char),
101	    (void **)&str_mmapio);
102	(void)OF_getprop_alloc(node,  "sri-cambridge,devname", sizeof(char),
103	    (void **)&str_devname);
104	if (OF_getprop(node, "sri-cambridge,devunit", &cell, sizeof(cell)) > 0)
105		devunit = cell;
106
107	/* Memory allocation and checking. */
108	sc->avg_rid = 0;
109	sc->avg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
110	    &sc->avg_rid, RF_ACTIVE);
111	if (sc->avg_res == NULL) {
112		device_printf(dev, "couldn't map memory\n");
113		return (ENXIO);
114	}
115	error = altera_avgen_attach(sc, str_fileio, str_mmapio, str_devname,
116	    devunit);
117	if (error != 0)
118		bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid,
119		    sc->avg_res);
120	if (str_fileio != NULL)
121		free(str_fileio, M_OFWPROP);
122	if (str_mmapio != NULL)
123		free(str_mmapio, M_OFWPROP);
124	if (str_devname != NULL)
125		free(str_devname, M_OFWPROP);
126	return (error);
127}
128
129static int
130altera_avgen_fdt_detach(device_t dev)
131{
132	struct altera_avgen_softc *sc;
133
134	sc = device_get_softc(dev);
135	altera_avgen_detach(sc);
136	bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid, sc->avg_res);
137	return (0);
138}
139
140static device_method_t altera_avgen_fdt_methods[] = {
141	DEVMETHOD(device_probe,		altera_avgen_fdt_probe),
142	DEVMETHOD(device_attach,	altera_avgen_fdt_attach),
143	DEVMETHOD(device_detach,	altera_avgen_fdt_detach),
144	{ 0, 0 }
145};
146
147static driver_t altera_avgen_fdt_driver = {
148	"altera_avgen",
149	altera_avgen_fdt_methods,
150	sizeof(struct altera_avgen_softc),
151};
152
153static devclass_t altera_avgen_devclass;
154
155DRIVER_MODULE(avgen, simplebus, altera_avgen_fdt_driver,
156    altera_avgen_devclass, 0, 0);
157