1/*-
2 * Copyright (c) 2003 Nate Lawson
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: releng/10.3/sys/dev/acpica/acpi_package.c 202771 2010-01-21 21:14:28Z jkim $");
29
30#include <sys/param.h>
31#include <sys/kernel.h>
32#include <sys/bus.h>
33#include <sys/sbuf.h>
34
35#include <machine/bus.h>
36#include <machine/resource.h>
37#include <sys/rman.h>
38
39#include <contrib/dev/acpica/include/acpi.h>
40
41#include <dev/acpica/acpivar.h>
42
43/*
44 * Package manipulation convenience functions
45 */
46
47int
48acpi_PkgInt(ACPI_OBJECT *res, int idx, UINT64 *dst)
49{
50    ACPI_OBJECT		*obj;
51
52    obj = &res->Package.Elements[idx];
53    if (obj == NULL || obj->Type != ACPI_TYPE_INTEGER)
54	return (EINVAL);
55    *dst = obj->Integer.Value;
56
57    return (0);
58}
59
60int
61acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst)
62{
63    UINT64		tmp;
64    int			error;
65
66    error = acpi_PkgInt(res, idx, &tmp);
67    if (error == 0)
68	*dst = (uint32_t)tmp;
69
70    return (error);
71}
72
73int
74acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size)
75{
76    ACPI_OBJECT		*obj;
77    void		*ptr;
78    size_t		 length;
79
80    obj = &res->Package.Elements[idx];
81    if (obj == NULL)
82	return (EINVAL);
83    bzero(dst, sizeof(dst));
84
85    switch (obj->Type) {
86    case ACPI_TYPE_STRING:
87	ptr = obj->String.Pointer;
88	length = obj->String.Length;
89	break;
90    case ACPI_TYPE_BUFFER:
91	ptr = obj->Buffer.Pointer;
92	length = obj->Buffer.Length;
93	break;
94    default:
95	return (EINVAL);
96    }
97
98    /* Make sure string will fit, including terminating NUL */
99    if (++length > size)
100	return (E2BIG);
101
102    strlcpy(dst, ptr, length);
103    return (0);
104}
105
106int
107acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type, int *rid,
108    struct resource **dst, u_int flags)
109{
110    ACPI_GENERIC_ADDRESS gas;
111    ACPI_OBJECT *obj;
112
113    obj = &res->Package.Elements[idx];
114    if (obj == NULL || obj->Type != ACPI_TYPE_BUFFER ||
115	obj->Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3)
116	return (EINVAL);
117
118    memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas));
119
120    return (acpi_bus_alloc_gas(dev, type, rid, &gas, dst, flags));
121}
122
123ACPI_HANDLE
124acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj)
125{
126    ACPI_HANDLE h;
127
128    if (obj == NULL)
129	return (NULL);
130
131    switch (obj->Type) {
132    case ACPI_TYPE_LOCAL_REFERENCE:
133    case ACPI_TYPE_ANY:
134	h = obj->Reference.Handle;
135	break;
136    case ACPI_TYPE_STRING:
137	/*
138	 * The String object usually contains a fully-qualified path, so
139	 * scope can be NULL.
140	 *
141	 * XXX This may not always be the case.
142	 */
143	if (ACPI_FAILURE(AcpiGetHandle(scope, obj->String.Pointer, &h)))
144	    h = NULL;
145	break;
146    default:
147	h = NULL;
148	break;
149    }
150
151    return (h);
152}
153