1/*-
2 * Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.org>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
18 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
20 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
21 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/bus.h>
34#include <sys/fbio.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
37#include <sys/rman.h>
38#include <sys/resource.h>
39#include <machine/bus.h>
40#include <vm/vm.h>
41#include <vm/vm_extern.h>
42#include <vm/vm_kern.h>
43#include <vm/pmap.h>
44
45#include <dev/fdt/simplebus.h>
46
47#include <dev/ofw/ofw_bus.h>
48#include <dev/ofw/ofw_bus_subr.h>
49
50static struct ofw_compat_data compat_data[] = {
51	{ "ti,sysc",	1 },
52	{ NULL,				0 }
53};
54
55struct ti_sysc_softc {
56	struct simplebus_softc	sc;
57	device_t		dev;
58};
59
60static int ti_sysc_probe(device_t dev);
61static int ti_sysc_attach(device_t dev);
62static int ti_sysc_detach(device_t dev);
63
64static int
65ti_sysc_probe(device_t dev)
66{
67	if (!ofw_bus_status_okay(dev))
68		return (ENXIO);
69
70	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
71		return (ENXIO);
72
73	device_set_desc(dev, "TI SYSC Interconnect");
74	if (!bootverbose)
75		device_quiet(dev);
76
77	return (BUS_PROBE_DEFAULT);
78}
79
80static int
81ti_sysc_attach(device_t dev)
82{
83	struct ti_sysc_softc *sc;
84	device_t cdev;
85	phandle_t node, child;
86
87	sc = device_get_softc(dev);
88	sc->dev = dev;
89	node = ofw_bus_get_node(dev);
90
91	simplebus_init(dev, node);
92	if (simplebus_fill_ranges(node, &sc->sc) < 0) {
93		device_printf(dev, "could not get ranges\n");
94		return (ENXIO);
95	}
96
97	for (child = OF_child(node); child > 0; child = OF_peer(child)) {
98		cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
99		if (cdev != NULL)
100			device_probe_and_attach(cdev);
101	}
102
103	return (bus_generic_attach(dev));
104}
105
106static int
107ti_sysc_detach(device_t dev)
108{
109
110	return (EBUSY);
111}
112
113static device_method_t ti_sysc_methods[] = {
114	/* Device interface */
115	DEVMETHOD(device_probe,		ti_sysc_probe),
116	DEVMETHOD(device_attach,	ti_sysc_attach),
117	DEVMETHOD(device_detach,	ti_sysc_detach),
118
119	DEVMETHOD_END
120};
121
122DEFINE_CLASS_1(ti_sysc, ti_sysc_driver, ti_sysc_methods,
123    sizeof(struct ti_sysc_softc), simplebus_driver);
124
125static devclass_t ti_sysc_devclass;
126
127EARLY_DRIVER_MODULE(ti_sysc, simplebus, ti_sysc_driver,
128ti_sysc_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
129