at91_tcb.c revision 302408 
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: stable/11/sys/arm/at91/at91_tcb.c 262600 2014-02-28 03:00:28Z imp $");
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
50struct tcb_softc {
51	struct resource	*mem_res;	/* Memory resource */
52	device_t	sc_dev;
53};
54
55static int
56at91_tcb_probe(device_t dev)
57{
58#ifdef FDT
59	if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-tcb"))
60		return (ENXIO);
61#endif
62	device_set_desc(dev, "TCB");
63        return (0);
64}
65
66static int
67at91_tcb_attach(device_t dev)
68{
69	int rid, err = 0;
70	struct tcb_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
85static device_method_t at91_tcb_methods[] = {
86	DEVMETHOD(device_probe, at91_tcb_probe),
87	DEVMETHOD(device_attach, at91_tcb_attach),
88	DEVMETHOD_END
89};
90
91static driver_t at91_tcb_driver = {
92	"at91_tcb",
93	at91_tcb_methods,
94	sizeof(struct tcb_softc),
95};
96
97static devclass_t at91_tcb_devclass;
98
99#ifdef FDT
100DRIVER_MODULE(at91_tcb, simplebus, at91_tcb_driver, at91_tcb_devclass, NULL,
101    NULL);
102#else
103DRIVER_MODULE(at91_tcb, atmelarm, at91_tcb_driver, at91_tcb_devclass, NULL,
104    NULL);
105#endif
106