rt305x_ic.c revision 331722 
1/*-
2 * Copyright (c) 2010 Aleksandr Rybalko.
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#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/11/sys/mips/rt305x/rt305x_ic.c 331722 2018-03-29 02:50:57Z eadler $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33#include <sys/interrupt.h>
34#include <sys/kernel.h>
35#include <sys/module.h>
36#include <sys/rman.h>
37#include <sys/malloc.h>
38
39#include <machine/bus.h>
40
41#include <mips/rt305x/rt305xreg.h>
42#include <mips/rt305x/rt305x_icvar.h>
43
44
45static int	rt305x_ic_probe(device_t);
46static int	rt305x_ic_attach(device_t);
47static int	rt305x_ic_detach(device_t);
48
49
50static struct rt305x_ic_softc *rt305x_ic_softc = NULL;
51
52static int
53rt305x_ic_probe(device_t dev)
54{
55	device_set_desc(dev, "RT305X Interrupt Controller driver");
56	return (0);
57}
58
59static int
60rt305x_ic_attach(device_t dev)
61{
62	struct rt305x_ic_softc *sc = device_get_softc(dev);
63	int error = 0;
64
65	KASSERT((device_get_unit(dev) == 0),
66	    ("rt305x_ic: Only one Interrupt Controller module supported"));
67
68	if (rt305x_ic_softc != NULL)
69		return (ENXIO);
70	rt305x_ic_softc = sc;
71
72
73	/* Map control/status registers. */
74	sc->mem_rid = 0;
75	sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
76	    &sc->mem_rid, RF_ACTIVE);
77
78	if (sc->mem_res == NULL) {
79		device_printf(dev, "couldn't map memory\n");
80		error = ENXIO;
81		rt305x_ic_detach(dev);
82		return(error);
83	}
84	return (bus_generic_attach(dev));
85}
86
87static int
88rt305x_ic_detach(device_t dev)
89{
90	struct rt305x_ic_softc *sc = device_get_softc(dev);
91
92	bus_generic_detach(dev);
93
94	if (sc->mem_res)
95		bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid,
96		    sc->mem_res);
97	return(0);
98}
99
100
101uint32_t
102rt305x_ic_get(uint32_t reg)
103{
104	struct rt305x_ic_softc *sc = rt305x_ic_softc;
105
106	if (!sc)
107		return (0);
108
109	return (bus_read_4(sc->mem_res, reg));
110}
111
112void
113rt305x_ic_set(uint32_t reg, uint32_t val)
114{
115	struct rt305x_ic_softc *sc = rt305x_ic_softc;
116
117	if (!sc)
118		return;
119
120	bus_write_4(sc->mem_res, reg, val);
121
122	return;
123}
124
125
126static device_method_t rt305x_ic_methods[] = {
127	DEVMETHOD(device_probe,			rt305x_ic_probe),
128	DEVMETHOD(device_attach,		rt305x_ic_attach),
129	DEVMETHOD(device_detach,		rt305x_ic_detach),
130
131	{0, 0},
132};
133
134static driver_t rt305x_ic_driver = {
135	"rt305x_ic",
136	rt305x_ic_methods,
137	sizeof(struct rt305x_ic_softc),
138};
139static devclass_t rt305x_ic_devclass;
140
141DRIVER_MODULE(rt305x_ic, obio, rt305x_ic_driver, rt305x_ic_devclass, 0, 0);
142