vf_mscm.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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__FBSDID("$FreeBSD: stable/11/sys/arm/freescale/vybrid/vf_mscm.c 330897 2018-03-14 03:19:51Z eadler $");
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/bus.h>
40#include <sys/kernel.h>
41#include <sys/module.h>
42#include <sys/malloc.h>
43#include <sys/rman.h>
44#include <sys/timeet.h>
45#include <sys/timetc.h>
46#include <sys/watchdog.h>
47
48#include <dev/fdt/fdt_common.h>
49#include <dev/ofw/openfirm.h>
50#include <dev/ofw/ofw_bus.h>
51#include <dev/ofw/ofw_bus_subr.h>
52
53#include <machine/bus.h>
54#include <machine/cpu.h>
55#include <machine/intr.h>
56
57#include <arm/freescale/vybrid/vf_common.h>
58
59#define	VF_NINT	112	/* Total number of interrupts */
60
61/* Int Router Shared Peripheral Routing Control */
62#define	MSCM_IRSPRC(n)	(0x880 + 2 * n)
63
64struct mscm_softc {
65	struct resource		*res[1];
66	bus_space_tag_t		bst;
67	bus_space_handle_t	bsh;
68};
69
70static struct resource_spec mscm_spec[] = {
71	{ SYS_RES_MEMORY,       0,      RF_ACTIVE },
72	{ -1, 0 }
73};
74
75static int
76mscm_probe(device_t dev)
77{
78
79	if (!ofw_bus_status_okay(dev))
80		return (ENXIO);
81
82	if (!ofw_bus_is_compatible(dev, "fsl,mvf600-mscm"))
83		return (ENXIO);
84
85	device_set_desc(dev, "Vybrid Family Miscellaneous System Control Module");
86	return (BUS_PROBE_DEFAULT);
87}
88
89static int
90mscm_attach(device_t dev)
91{
92	struct mscm_softc *sc;
93	int i;
94
95	sc = device_get_softc(dev);
96
97	if (bus_alloc_resources(dev, mscm_spec, sc->res)) {
98		device_printf(dev, "could not allocate resources\n");
99		return (ENXIO);
100	}
101
102	/* Memory interface */
103	sc->bst = rman_get_bustag(sc->res[0]);
104	sc->bsh = rman_get_bushandle(sc->res[0]);
105
106	/* Route all the interrupts to CP0 */
107	for (i = 0; i < VF_NINT; i++)
108		WRITE2(sc, MSCM_IRSPRC(i), 1);
109
110	return (0);
111}
112
113static device_method_t mscm_methods[] = {
114	DEVMETHOD(device_probe,		mscm_probe),
115	DEVMETHOD(device_attach,	mscm_attach),
116	{ 0, 0 }
117};
118
119static driver_t mscm_driver = {
120	"mscm",
121	mscm_methods,
122	sizeof(struct mscm_softc),
123};
124
125static devclass_t mscm_devclass;
126
127DRIVER_MODULE(mscm, simplebus, mscm_driver, mscm_devclass, 0, 0);
128