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