Revert "ARM: tegra: tegratab: dummy change"
[linux-2.6.git] / drivers / acpi / acpica / rslist.c
1 /*******************************************************************************
2  *
3  * Module Name: rslist - Linked list utilities
4  *
5  ******************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2012, Intel Corp.
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 "accommon.h"
46 #include "acresrc.h"
47
48 #define _COMPONENT          ACPI_RESOURCES
49 ACPI_MODULE_NAME("rslist")
50
51 /*******************************************************************************
52  *
53  * FUNCTION:    acpi_rs_convert_aml_to_resources
54  *
55  * PARAMETERS:  acpi_walk_aml_callback
56  *              resource_ptr            - Pointer to the buffer that will
57  *                                        contain the output structures
58  *
59  * RETURN:      Status
60  *
61  * DESCRIPTION: Convert an AML resource to an internal representation of the
62  *              resource that is aligned and easier to access.
63  *
64  ******************************************************************************/
65 acpi_status
66 acpi_rs_convert_aml_to_resources(u8 * aml,
67                                  u32 length,
68                                  u32 offset, u8 resource_index, void **context)
69 {
70         struct acpi_resource **resource_ptr =
71             ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context);
72         struct acpi_resource *resource;
73         union aml_resource *aml_resource;
74         struct acpi_rsconvert_info *conversion_table;
75         acpi_status status;
76
77         ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources);
78
79         /*
80          * Check that the input buffer and all subsequent pointers into it
81          * are aligned on a native word boundary. Most important on IA64
82          */
83         resource = *resource_ptr;
84         if (ACPI_IS_MISALIGNED(resource)) {
85                 ACPI_WARNING((AE_INFO,
86                               "Misaligned resource pointer %p", resource));
87         }
88
89         /* Get the appropriate conversion info table */
90
91         aml_resource = ACPI_CAST_PTR(union aml_resource, aml);
92         if (acpi_ut_get_resource_type(aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) {
93                 if (aml_resource->common_serial_bus.type >
94                     AML_RESOURCE_MAX_SERIALBUSTYPE) {
95                         conversion_table = NULL;
96                 } else {
97                         /* This is an I2C, SPI, or UART serial_bus descriptor */
98
99                         conversion_table =
100                             acpi_gbl_convert_resource_serial_bus_dispatch
101                             [aml_resource->common_serial_bus.type];
102                 }
103         } else {
104                 conversion_table =
105                     acpi_gbl_get_resource_dispatch[resource_index];
106         }
107
108         if (!conversion_table) {
109                 ACPI_ERROR((AE_INFO,
110                             "Invalid/unsupported resource descriptor: Type 0x%2.2X",
111                             resource_index));
112                 return (AE_AML_INVALID_RESOURCE_TYPE);
113         }
114
115         /* Convert the AML byte stream resource to a local resource struct */
116
117         status =
118             acpi_rs_convert_aml_to_resource(resource, aml_resource,
119                                             conversion_table);
120         if (ACPI_FAILURE(status)) {
121                 ACPI_EXCEPTION((AE_INFO, status,
122                                 "Could not convert AML resource (Type 0x%X)",
123                                 *aml));
124                 return_ACPI_STATUS(status);
125         }
126
127         ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
128                           "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
129                           acpi_ut_get_resource_type(aml), length,
130                           resource->length));
131
132         /* Point to the next structure in the output buffer */
133
134         *resource_ptr = ACPI_NEXT_RESOURCE(resource);
135         return_ACPI_STATUS(AE_OK);
136 }
137
138 /*******************************************************************************
139  *
140  * FUNCTION:    acpi_rs_convert_resources_to_aml
141  *
142  * PARAMETERS:  Resource            - Pointer to the resource linked list
143  *              aml_size_needed     - Calculated size of the byte stream
144  *                                    needed from calling acpi_rs_get_aml_length()
145  *                                    The size of the output_buffer is
146  *                                    guaranteed to be >= aml_size_needed
147  *              output_buffer       - Pointer to the buffer that will
148  *                                    contain the byte stream
149  *
150  * RETURN:      Status
151  *
152  * DESCRIPTION: Takes the resource linked list and parses it, creating a
153  *              byte stream of resources in the caller's output buffer
154  *
155  ******************************************************************************/
156
157 acpi_status
158 acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
159                                  acpi_size aml_size_needed, u8 * output_buffer)
160 {
161         u8 *aml = output_buffer;
162         u8 *end_aml = output_buffer + aml_size_needed;
163         struct acpi_rsconvert_info *conversion_table;
164         acpi_status status;
165
166         ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml);
167
168         /* Walk the resource descriptor list, convert each descriptor */
169
170         while (aml < end_aml) {
171
172                 /* Validate the (internal) Resource Type */
173
174                 if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
175                         ACPI_ERROR((AE_INFO,
176                                     "Invalid descriptor type (0x%X) in resource list",
177                                     resource->type));
178                         return_ACPI_STATUS(AE_BAD_DATA);
179                 }
180
181                 /* Perform the conversion */
182
183                 if (resource->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
184                         if (resource->data.common_serial_bus.type >
185                             AML_RESOURCE_MAX_SERIALBUSTYPE) {
186                                 conversion_table = NULL;
187                         } else {
188                                 /* This is an I2C, SPI, or UART serial_bus descriptor */
189
190                                 conversion_table =
191                                     acpi_gbl_convert_resource_serial_bus_dispatch
192                                     [resource->data.common_serial_bus.type];
193                         }
194                 } else {
195                         conversion_table =
196                             acpi_gbl_set_resource_dispatch[resource->type];
197                 }
198
199                 if (!conversion_table) {
200                         ACPI_ERROR((AE_INFO,
201                                     "Invalid/unsupported resource descriptor: Type 0x%2.2X",
202                                     resource->type));
203                         return (AE_AML_INVALID_RESOURCE_TYPE);
204                 }
205
206                 status = acpi_rs_convert_resource_to_aml(resource,
207                                                          ACPI_CAST_PTR(union
208                                                                        aml_resource,
209                                                                        aml),
210                                                          conversion_table);
211                 if (ACPI_FAILURE(status)) {
212                         ACPI_EXCEPTION((AE_INFO, status,
213                                         "Could not convert resource (type 0x%X) to AML",
214                                         resource->type));
215                         return_ACPI_STATUS(status);
216                 }
217
218                 /* Perform final sanity check on the new AML resource descriptor */
219
220                 status =
221                     acpi_ut_validate_resource(ACPI_CAST_PTR
222                                               (union aml_resource, aml), NULL);
223                 if (ACPI_FAILURE(status)) {
224                         return_ACPI_STATUS(status);
225                 }
226
227                 /* Check for end-of-list, normal exit */
228
229                 if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
230
231                         /* An End Tag indicates the end of the input Resource Template */
232
233                         return_ACPI_STATUS(AE_OK);
234                 }
235
236                 /*
237                  * Extract the total length of the new descriptor and set the
238                  * Aml to point to the next (output) resource descriptor
239                  */
240                 aml += acpi_ut_get_descriptor_length(aml);
241
242                 /* Point to the next input resource descriptor */
243
244                 resource = ACPI_NEXT_RESOURCE(resource);
245         }
246
247         /* Completed buffer, but did not find an end_tag resource descriptor */
248
249         return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
250 }