1 /*-
2 * Copyright (c) 2019 Emmanuel Vadot <[email protected]>
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
50 static struct ofw_compat_data compat_data[] = {
51 { "ti,sysc", 1 },
52 { NULL, 0 }
53 };
54
55 struct ti_sysc_softc {
56 struct simplebus_softc sc;
57 device_t dev;
58 };
59
60 static int ti_sysc_probe(device_t dev);
61 static int ti_sysc_attach(device_t dev);
62 static int ti_sysc_detach(device_t dev);
63
64 static int
ti_sysc_probe(device_t dev)65 ti_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 return (BUS_PROBE_DEFAULT);
75 }
76
77 static int
ti_sysc_attach(device_t dev)78 ti_sysc_attach(device_t dev)
79 {
80 struct ti_sysc_softc *sc;
81 device_t cdev;
82 phandle_t node, child;
83
84 sc = device_get_softc(dev);
85 sc->dev = dev;
86 node = ofw_bus_get_node(dev);
87
88 simplebus_init(dev, node);
89 if (simplebus_fill_ranges(node, &sc->sc) < 0) {
90 device_printf(dev, "could not get ranges\n");
91 return (ENXIO);
92 }
93
94 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
95 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
96 if (cdev != NULL)
97 device_probe_and_attach(cdev);
98 }
99
100 return (bus_generic_attach(dev));
101 }
102
103 static int
ti_sysc_detach(device_t dev)104 ti_sysc_detach(device_t dev)
105 {
106
107 return (EBUSY);
108 }
109
110 static device_method_t ti_sysc_methods[] = {
111 /* Device interface */
112 DEVMETHOD(device_probe, ti_sysc_probe),
113 DEVMETHOD(device_attach, ti_sysc_attach),
114 DEVMETHOD(device_detach, ti_sysc_detach),
115
116 DEVMETHOD_END
117 };
118
119 DEFINE_CLASS_1(ti_sysc, ti_sysc_driver, ti_sysc_methods,
120 sizeof(struct ti_sysc_softc), simplebus_driver);
121
122 static devclass_t ti_sysc_devclass;
123
124 EARLY_DRIVER_MODULE(ti_sysc, simplebus, ti_sysc_driver,
125 ti_sysc_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
126