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