vf_mscm.c revision 261410 
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: head/sys/arm/freescale/vybrid/vf_mscm.c 261410 2014-02-02 19:17:28Z 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
63struct mscm_softc {
64	struct resource		*res[1];
65	bus_space_tag_t		bst;
66	bus_space_handle_t	bsh;
67};
68
69static struct resource_spec mscm_spec[] = {
70	{ SYS_RES_MEMORY,       0,      RF_ACTIVE },
71	{ -1, 0 }
72};
73
74static int
75mscm_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
88static int
89mscm_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
112static device_method_t mscm_methods[] = {
113	DEVMETHOD(device_probe,		mscm_probe),
114	DEVMETHOD(device_attach,	mscm_attach),
115	{ 0, 0 }
116};
117
118static driver_t mscm_driver = {
119	"mscm",
120	mscm_methods,
121	sizeof(struct mscm_softc),
122};
123
124static devclass_t mscm_devclass;
125
126DRIVER_MODULE(mscm, simplebus, mscm_driver, mscm_devclass, 0, 0);
127