1 /*-
2 * Copyright (c) 2014 Warner Losh. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include "opt_platform.h"
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/bus.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/resource.h>
36 #include <sys/systm.h>
37 #include <sys/rman.h>
38
39 #include <machine/bus.h>
40
41 #include <arm/at91/at91var.h>
42 #include <arm/at91/at91_aicreg.h>
43
44 #ifdef FDT
45 #include <dev/fdt/fdt_common.h>
46 #include <dev/ofw/ofw_bus.h>
47 #include <dev/ofw/ofw_bus_subr.h>
48 #endif
49
50 struct sdramc_softc {
51 struct resource *mem_res; /* Memory resource */
52 device_t sc_dev;
53 };
54
55 static int
at91_sdramc_probe(device_t dev)56 at91_sdramc_probe(device_t dev)
57 {
58 #ifdef FDT
59 if (!ofw_bus_is_compatible(dev, "atmel,at91sam9260-sdramc"))
60 return (ENXIO);
61 #endif
62 device_set_desc(dev, "SDRAMC");
63 return (0);
64 }
65
66 static int
at91_sdramc_attach(device_t dev)67 at91_sdramc_attach(device_t dev)
68 {
69 int rid, err = 0;
70 struct sdramc_softc *sc;
71
72 sc = device_get_softc(dev);
73 sc->sc_dev = dev;
74
75 rid = 0;
76 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
77 RF_ACTIVE);
78
79 if (sc->mem_res == NULL)
80 panic("couldn't allocate register resources");
81
82 return (err);
83 }
84
85 static device_method_t at91_sdramc_methods[] = {
86 DEVMETHOD(device_probe, at91_sdramc_probe),
87 DEVMETHOD(device_attach, at91_sdramc_attach),
88 DEVMETHOD_END
89 };
90
91 static driver_t at91_sdramc_driver = {
92 "at91_sdramc",
93 at91_sdramc_methods,
94 sizeof(struct sdramc_softc),
95 };
96
97 static devclass_t at91_sdramc_devclass;
98
99 #ifdef FDT
100 DRIVER_MODULE(at91_sdramc, simplebus, at91_sdramc_driver, at91_sdramc_devclass, NULL,
101 NULL);
102 #else
103 DRIVER_MODULE(at91_sdramc, atmelarm, at91_sdramc_driver, at91_sdramc_devclass, NULL,
104 NULL);
105 #endif
106