Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[pandora-kernel.git] / drivers / acpi / dispatcher / dsinit.c
1 /******************************************************************************
2  *
3  * Module Name: dsinit - Object initialization namespace walk
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2006, R. Byron Moore
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions, and the following disclaimer,
16  *    without modification.
17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18  *    substantially similar to the "NO WARRANTY" disclaimer below
19  *    ("Disclaimer") and any redistribution must be conditioned upon
20  *    including a substantially similar Disclaimer requirement for further
21  *    binary redistribution.
22  * 3. Neither the names of the above-listed copyright holders nor the names
23  *    of any contributors may be used to endorse or promote products derived
24  *    from this software without specific prior written permission.
25  *
26  * Alternatively, this software may be distributed under the terms of the
27  * GNU General Public License ("GPL") version 2 as published by the Free
28  * Software Foundation.
29  *
30  * NO WARRANTY
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41  * POSSIBILITY OF SUCH DAMAGES.
42  */
43
44 #include <acpi/acpi.h>
45 #include <acpi/acdispat.h>
46 #include <acpi/acnamesp.h>
47
48 #define _COMPONENT          ACPI_DISPATCHER
49 ACPI_MODULE_NAME("dsinit")
50
51 /* Local prototypes */
52 static acpi_status
53 acpi_ds_init_one_object(acpi_handle obj_handle,
54                         u32 level, void *context, void **return_value);
55
56 /*******************************************************************************
57  *
58  * FUNCTION:    acpi_ds_init_one_object
59  *
60  * PARAMETERS:  obj_handle      - Node for the object
61  *              Level           - Current nesting level
62  *              Context         - Points to a init info struct
63  *              return_value    - Not used
64  *
65  * RETURN:      Status
66  *
67  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
68  *              within the namespace.
69  *
70  *              Currently, the only objects that require initialization are:
71  *              1) Methods
72  *              2) Operation Regions
73  *
74  ******************************************************************************/
75
76 static acpi_status
77 acpi_ds_init_one_object(acpi_handle obj_handle,
78                         u32 level, void *context, void **return_value)
79 {
80         struct acpi_init_walk_info *info =
81             (struct acpi_init_walk_info *)context;
82         struct acpi_namespace_node *node =
83             (struct acpi_namespace_node *)obj_handle;
84         acpi_object_type type;
85         acpi_status status;
86
87         ACPI_FUNCTION_ENTRY();
88
89         /*
90          * We are only interested in NS nodes owned by the table that
91          * was just loaded
92          */
93         if (node->owner_id != info->table_desc->owner_id) {
94                 return (AE_OK);
95         }
96
97         info->object_count++;
98
99         /* And even then, we are only interested in a few object types */
100
101         type = acpi_ns_get_type(obj_handle);
102
103         switch (type) {
104         case ACPI_TYPE_REGION:
105
106                 status = acpi_ds_initialize_region(obj_handle);
107                 if (ACPI_FAILURE(status)) {
108                         ACPI_EXCEPTION((AE_INFO, status,
109                                         "During Region initialization %p [%4.4s]",
110                                         obj_handle,
111                                         acpi_ut_get_node_name(obj_handle)));
112                 }
113
114                 info->op_region_count++;
115                 break;
116
117         case ACPI_TYPE_METHOD:
118
119                 /*
120                  * Set the execution data width (32 or 64) based upon the
121                  * revision number of the parent ACPI table.
122                  * TBD: This is really for possible future support of integer width
123                  * on a per-table basis. Currently, we just use a global for the width.
124                  */
125                 if (info->table_desc->pointer->revision == 1) {
126                         node->flags |= ANOBJ_DATA_WIDTH_32;
127                 }
128
129                 info->method_count++;
130                 break;
131
132         case ACPI_TYPE_DEVICE:
133
134                 info->device_count++;
135                 break;
136
137         default:
138                 break;
139         }
140
141         /*
142          * We ignore errors from above, and always return OK, since
143          * we don't want to abort the walk on a single error.
144          */
145         return (AE_OK);
146 }
147
148 /*******************************************************************************
149  *
150  * FUNCTION:    acpi_ds_initialize_objects
151  *
152  * PARAMETERS:  table_desc      - Descriptor for parent ACPI table
153  *              start_node      - Root of subtree to be initialized.
154  *
155  * RETURN:      Status
156  *
157  * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
158  *              necessary initialization on the objects found therein
159  *
160  ******************************************************************************/
161
162 acpi_status
163 acpi_ds_initialize_objects(struct acpi_table_desc * table_desc,
164                            struct acpi_namespace_node * start_node)
165 {
166         acpi_status status;
167         struct acpi_init_walk_info info;
168
169         ACPI_FUNCTION_TRACE(ds_initialize_objects);
170
171         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
172                           "**** Starting initialization of namespace objects ****\n"));
173         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));
174
175         info.method_count = 0;
176         info.op_region_count = 0;
177         info.object_count = 0;
178         info.device_count = 0;
179         info.table_desc = table_desc;
180
181         /* Walk entire namespace from the supplied root */
182
183         status = acpi_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
184                                      acpi_ds_init_one_object, &info, NULL);
185         if (ACPI_FAILURE(status)) {
186                 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
187         }
188
189         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
190                               "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n",
191                               table_desc->pointer->signature,
192                               table_desc->owner_id, info.object_count,
193                               info.device_count, info.method_count,
194                               info.op_region_count));
195
196         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
197                           "%hd Methods, %hd Regions\n", info.method_count,
198                           info.op_region_count));
199
200         return_ACPI_STATUS(AE_OK);
201 }