1 /*-
2 * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 /*
28 * Vybrid Family Miscellaneous System Control Module (MSCM)
29 * Chapter 66, Vybrid Reference Manual, Rev. 5, 07/2013
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD: releng/10.1/sys/arm/freescale/vybrid/vf_mscm.c 266152 2014-05-15 16:11:06Z ian $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/bus.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40 #include <sys/malloc.h>
41 #include <sys/rman.h>
42 #include <sys/timeet.h>
43 #include <sys/timetc.h>
44 #include <sys/watchdog.h>
45
46 #include <dev/fdt/fdt_common.h>
47 #include <dev/ofw/openfirm.h>
48 #include <dev/ofw/ofw_bus.h>
49 #include <dev/ofw/ofw_bus_subr.h>
50
51 #include <machine/bus.h>
52 #include <machine/fdt.h>
53 #include <machine/cpu.h>
54 #include <machine/intr.h>
55
56 #include <arm/freescale/vybrid/vf_common.h>
57
58 #define VF_NINT 112 /* Total number of interrupts */
59
60 /* Int Router Shared Peripheral Routing Control */
61 #define MSCM_IRSPRC(n) (0x880 + 2 * n)
62
63 struct mscm_softc {
64 struct resource *res[1];
65 bus_space_tag_t bst;
66 bus_space_handle_t bsh;
67 };
68
69 static struct resource_spec mscm_spec[] = {
70 { SYS_RES_MEMORY, 0, RF_ACTIVE },
71 { -1, 0 }
72 };
73
74 static int
75 mscm_probe(device_t dev)
76 {
77
78 if (!ofw_bus_status_okay(dev))
79 return (ENXIO);
80
81 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-mscm"))
82 return (ENXIO);
83
84 device_set_desc(dev, "Vybrid Family Miscellaneous System Control Module");
85 return (BUS_PROBE_DEFAULT);
86 }
87
88 static int
89 mscm_attach(device_t dev)
90 {
91 struct mscm_softc *sc;
92 int i;
93
94 sc = device_get_softc(dev);
95
96 if (bus_alloc_resources(dev, mscm_spec, sc->res)) {
97 device_printf(dev, "could not allocate resources\n");
98 return (ENXIO);
99 }
100
101 /* Memory interface */
102 sc->bst = rman_get_bustag(sc->res[0]);
103 sc->bsh = rman_get_bushandle(sc->res[0]);
104
105 /* Route all the interrupts to CP0 */
106 for (i = 0; i < VF_NINT; i++)
107 WRITE2(sc, MSCM_IRSPRC(i), 1);
108
109 return (0);
110 }
111
112 static device_method_t mscm_methods[] = {
113 DEVMETHOD(device_probe, mscm_probe),
114 DEVMETHOD(device_attach, mscm_attach),
115 { 0, 0 }
116 };
117
118 static driver_t mscm_driver = {
119 "mscm",
120 mscm_methods,
121 sizeof(struct mscm_softc),
122 };
123
124 static devclass_t mscm_devclass;
125
126 DRIVER_MODULE(mscm, simplebus, mscm_driver, mscm_devclass, 0, 0);
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