1/*-
2 * Copyright 2015 Alexander Kabaev <kan@FreeBSD.org>
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 * Ingenic JZ4780 NAND and External Memory Controller (NEMC) driver.
29 *
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD$");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/conf.h>
38#include <sys/bus.h>
39#include <sys/kernel.h>
40#include <sys/module.h>
41#include <sys/lock.h>
42#include <sys/mutex.h>
43#include <sys/resource.h>
44#include <sys/rman.h>
45
46#include <machine/bus.h>
47
48#include <dev/fdt/fdt_common.h>
49#include <dev/ofw/ofw_bus.h>
50#include <dev/ofw/ofw_bus_subr.h>
51
52struct jz4780_nand_softc {
53	device_t		dev;
54	struct resource		*res[1];
55};
56
57static struct resource_spec jz4780_nand_spec[] = {
58	{ SYS_RES_MEMORY, 0, RF_ACTIVE },
59	{ -1, 0 }
60};
61
62static int jz4780_nand_probe(device_t dev);
63static int jz4780_nand_attach(device_t dev);
64static int jz4780_nand_detach(device_t dev);
65
66static int
67jz4780_nand_probe(device_t dev)
68{
69
70	if (!ofw_bus_status_okay(dev))
71		return (ENXIO);
72
73	if (!ofw_bus_is_compatible(dev, "ingenic,jz4780-nand"))
74		return (ENXIO);
75
76	device_set_desc(dev, "Ingenic JZ4780 NAND Controller");
77
78	return (BUS_PROBE_DEFAULT);
79}
80
81static int
82jz4780_nand_attach(device_t dev)
83{
84	struct jz4780_nand_softc *sc = device_get_softc(dev);
85
86	sc->dev = dev;
87
88	if (bus_alloc_resources(dev, jz4780_nand_spec, sc->res)) {
89		device_printf(dev, "could not allocate resources for device\n");
90		return (ENXIO);
91	}
92
93	return (0);
94}
95
96static int
97jz4780_nand_detach(device_t dev)
98{
99	struct jz4780_nand_softc *sc = device_get_softc(dev);
100
101	bus_release_resources(dev, jz4780_nand_spec, sc->res);
102	return (0);
103}
104
105static device_method_t jz4780_nand_methods[] = {
106	/* Device interface */
107	DEVMETHOD(device_probe,		jz4780_nand_probe),
108	DEVMETHOD(device_attach,	jz4780_nand_attach),
109	DEVMETHOD(device_detach,	jz4780_nand_detach),
110
111	DEVMETHOD_END
112};
113
114static driver_t jz4780_nand_driver = {
115	"nand",
116	jz4780_nand_methods,
117	sizeof(struct jz4780_nand_softc),
118};
119
120static devclass_t jz4780_nand_devclass;
121
122DRIVER_MODULE(jz4780_nand, simplebus, jz4780_nand_driver,
123    jz4780_nand_devclass, 0, 0);
124