FreeBSD/Linux Kernel Cross Reference
sys/arm/ti/ti_scm.c
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 * $FreeBSD$
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 /* Based on sys/arm/ti/ti_sysc.c */
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/bus.h>
38 #include <sys/fbio.h>
39 #include <sys/kernel.h>
40 #include <sys/module.h>
41 #include <sys/rman.h>
42 #include <sys/resource.h>
43 #include <machine/bus.h>
44 #include <vm/vm.h>
45 #include <vm/vm_extern.h>
46 #include <vm/vm_kern.h>
47 #include <vm/pmap.h>
48
49 #include <dev/fdt/simplebus.h>
50
51 #include <dev/ofw/ofw_bus.h>
52 #include <dev/ofw/ofw_bus_subr.h>
53
54 #define TI_AM3_SCM 14
55 #define TI_AM4_SCM 13
56 #define TI_DM814_SCRM 12
57 #define TI_DM816_SCRM 11
58 #define TI_OMAP2_SCM 10
59 #define TI_OMAP3_SCM 9
60 #define TI_OMAP4_SCM_CORE 8
61 #define TI_OMAP4_SCM_PADCONF_CORE 7
62 #define TI_OMAP4_SCM_WKUP 6
63 #define TI_OMAP4_SCM_PADCONF_WKUP 5
64 #define TI_OMAP5_SCM_CORE 4
65 #define TI_OMAP5_SCM_PADCONF_CORE 3
66 #define TI_OMAP5_SCM_WKUP_PAD_CONF 2
67 #define TI_DRA7_SCM_CORE 1
68 #define TI_SCM_END 0
69
70 static struct ofw_compat_data compat_data[] = {
71 { "ti,am3-scm", TI_AM3_SCM },
72 { "ti,am4-scm", TI_AM4_SCM },
73 { "ti,dm814-scrm", TI_DM814_SCRM },
74 { "ti,dm816-scrm", TI_DM816_SCRM },
75 { "ti,omap2-scm", TI_OMAP2_SCM },
76 { "ti,omap3-scm", TI_OMAP3_SCM },
77 { "ti,omap4-scm-core", TI_OMAP4_SCM_CORE },
78 { "ti,omap4-scm-padconf-core", TI_OMAP4_SCM_PADCONF_CORE },
79 { "ti,omap4-scm-wkup", TI_OMAP4_SCM_WKUP },
80 { "ti,omap4-scm-padconf-wkup", TI_OMAP4_SCM_PADCONF_WKUP },
81 { "ti,omap5-scm-core", TI_OMAP5_SCM_CORE },
82 { "ti,omap5-scm-padconf-core", TI_OMAP5_SCM_PADCONF_CORE },
83 { "ti,omap5-scm-wkup-pad-conf", TI_OMAP5_SCM_WKUP_PAD_CONF },
84 { "ti,dra7-scm-core", TI_DRA7_SCM_CORE },
85 { NULL, TI_SCM_END }
86 };
87
88 struct ti_scm_softc {
89 struct simplebus_softc sc;
90 device_t dev;
91 };
92
93 static int ti_scm_probe(device_t dev);
94 static int ti_scm_attach(device_t dev);
95 static int ti_scm_detach(device_t dev);
96
97 static int
98 ti_scm_probe(device_t dev)
99 {
100 if (!ofw_bus_status_okay(dev))
101 return (ENXIO);
102
103 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
104 return (ENXIO);
105
106 device_set_desc(dev, "TI OMAP Control Module");
107
108 return (BUS_PROBE_DEFAULT);
109 }
110
111 static int
112 ti_scm_attach(device_t dev)
113 {
114 struct ti_scm_softc *sc;
115 device_t cdev;
116 phandle_t node, child;
117
118 sc = device_get_softc(dev);
119 sc->dev = dev;
120 node = ofw_bus_get_node(dev);
121
122 simplebus_init(dev, node);
123 if (simplebus_fill_ranges(node, &sc->sc) < 0) {
124 device_printf(dev, "could not get ranges\n");
125 return (ENXIO);
126 }
127
128 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
129 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
130 if (cdev != NULL)
131 device_probe_and_attach(cdev);
132 }
133
134 return (bus_generic_attach(dev));
135 }
136
137 static int
138 ti_scm_detach(device_t dev)
139 {
140 return (EBUSY);
141 }
142
143 static device_method_t ti_scm_methods[] = {
144 /* Device interface */
145 DEVMETHOD(device_probe, ti_scm_probe),
146 DEVMETHOD(device_attach, ti_scm_attach),
147 DEVMETHOD(device_detach, ti_scm_detach),
148
149 DEVMETHOD_END
150 };
151
152 DEFINE_CLASS_1(ti_scm, ti_scm_driver, ti_scm_methods,
153 sizeof(struct ti_scm_softc), simplebus_driver);
154
155 EARLY_DRIVER_MODULE(ti_scm, simplebus, ti_scm_driver, 0, 0,
156 BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
157 MODULE_VERSION(ti_scm, 1);
158 MODULE_DEPEND(ti_scm, ti_sysc, 1, 1, 1);
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