1 /*-
2 * Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.org>
3 *
4 * Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 /* Based on sys/arm/ti/ti_sysc.c */
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 #define TI_AM3_SCM 14
51 #define TI_AM4_SCM 13
52 #define TI_DM814_SCRM 12
53 #define TI_DM816_SCRM 11
54 #define TI_OMAP2_SCM 10
55 #define TI_OMAP3_SCM 9
56 #define TI_OMAP4_SCM_CORE 8
57 #define TI_OMAP4_SCM_PADCONF_CORE 7
58 #define TI_OMAP4_SCM_WKUP 6
59 #define TI_OMAP4_SCM_PADCONF_WKUP 5
60 #define TI_OMAP5_SCM_CORE 4
61 #define TI_OMAP5_SCM_PADCONF_CORE 3
62 #define TI_OMAP5_SCM_WKUP_PAD_CONF 2
63 #define TI_DRA7_SCM_CORE 1
64 #define TI_SCM_END 0
65
66 static struct ofw_compat_data compat_data[] = {
67 { "ti,am3-scm", TI_AM3_SCM },
68 { "ti,am4-scm", TI_AM4_SCM },
69 { "ti,dm814-scrm", TI_DM814_SCRM },
70 { "ti,dm816-scrm", TI_DM816_SCRM },
71 { "ti,omap2-scm", TI_OMAP2_SCM },
72 { "ti,omap3-scm", TI_OMAP3_SCM },
73 { "ti,omap4-scm-core", TI_OMAP4_SCM_CORE },
74 { "ti,omap4-scm-padconf-core", TI_OMAP4_SCM_PADCONF_CORE },
75 { "ti,omap4-scm-wkup", TI_OMAP4_SCM_WKUP },
76 { "ti,omap4-scm-padconf-wkup", TI_OMAP4_SCM_PADCONF_WKUP },
77 { "ti,omap5-scm-core", TI_OMAP5_SCM_CORE },
78 { "ti,omap5-scm-padconf-core", TI_OMAP5_SCM_PADCONF_CORE },
79 { "ti,omap5-scm-wkup-pad-conf", TI_OMAP5_SCM_WKUP_PAD_CONF },
80 { "ti,dra7-scm-core", TI_DRA7_SCM_CORE },
81 { NULL, TI_SCM_END }
82 };
83
84 struct ti_scm_softc {
85 struct simplebus_softc sc;
86 device_t dev;
87 };
88
89 static int ti_scm_probe(device_t dev);
90 static int ti_scm_attach(device_t dev);
91 static int ti_scm_detach(device_t dev);
92
93 static int
ti_scm_probe(device_t dev)94 ti_scm_probe(device_t dev)
95 {
96 if (!ofw_bus_status_okay(dev))
97 return (ENXIO);
98
99 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
100 return (ENXIO);
101
102 device_set_desc(dev, "TI OMAP Control Module");
103
104 return (BUS_PROBE_DEFAULT);
105 }
106
107 static int
ti_scm_attach(device_t dev)108 ti_scm_attach(device_t dev)
109 {
110 struct ti_scm_softc *sc;
111 device_t cdev;
112 phandle_t node, child;
113
114 sc = device_get_softc(dev);
115 sc->dev = dev;
116 node = ofw_bus_get_node(dev);
117
118 simplebus_init(dev, node);
119 if (simplebus_fill_ranges(node, &sc->sc) < 0) {
120 device_printf(dev, "could not get ranges\n");
121 return (ENXIO);
122 }
123
124 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
125 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
126 if (cdev != NULL)
127 device_probe_and_attach(cdev);
128 }
129
130 return (bus_generic_attach(dev));
131 }
132
133 static int
ti_scm_detach(device_t dev)134 ti_scm_detach(device_t dev)
135 {
136 return (EBUSY);
137 }
138
139 static device_method_t ti_scm_methods[] = {
140 /* Device interface */
141 DEVMETHOD(device_probe, ti_scm_probe),
142 DEVMETHOD(device_attach, ti_scm_attach),
143 DEVMETHOD(device_detach, ti_scm_detach),
144
145 DEVMETHOD_END
146 };
147
148 DEFINE_CLASS_1(ti_scm, ti_scm_driver, ti_scm_methods,
149 sizeof(struct ti_scm_softc), simplebus_driver);
150
151 EARLY_DRIVER_MODULE(ti_scm, simplebus, ti_scm_driver, 0, 0,
152 BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
153 MODULE_VERSION(ti_scm, 1);
154 MODULE_DEPEND(ti_scm, ti_sysc, 1, 1, 1);
155