aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/executer/exfield.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/executer/exfield.c')
-rw-r--r--drivers/acpi/executer/exfield.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/drivers/acpi/executer/exfield.c b/drivers/acpi/executer/exfield.c
deleted file mode 100644
index 7b6df031039d..000000000000
--- a/drivers/acpi/executer/exfield.c
+++ /dev/null
@@ -1,340 +0,0 @@
1/******************************************************************************
2 *
3 * Module Name: exfield - ACPI AML (p-code) execution - field manipulation
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2008, 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 <acpi/accommon.h>
46#include <acpi/acdispat.h>
47#include <acpi/acinterp.h>
48
49#define _COMPONENT ACPI_EXECUTER
50ACPI_MODULE_NAME("exfield")
51
52/*******************************************************************************
53 *
54 * FUNCTION: acpi_ex_read_data_from_field
55 *
56 * PARAMETERS: walk_state - Current execution state
57 * obj_desc - The named field
58 * ret_buffer_desc - Where the return data object is stored
59 *
60 * RETURN: Status
61 *
62 * DESCRIPTION: Read from a named field. Returns either an Integer or a
63 * Buffer, depending on the size of the field.
64 *
65 ******************************************************************************/
66acpi_status
67acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state,
68 union acpi_operand_object *obj_desc,
69 union acpi_operand_object **ret_buffer_desc)
70{
71 acpi_status status;
72 union acpi_operand_object *buffer_desc;
73 acpi_size length;
74 void *buffer;
75
76 ACPI_FUNCTION_TRACE_PTR(ex_read_data_from_field, obj_desc);
77
78 /* Parameter validation */
79
80 if (!obj_desc) {
81 return_ACPI_STATUS(AE_AML_NO_OPERAND);
82 }
83 if (!ret_buffer_desc) {
84 return_ACPI_STATUS(AE_BAD_PARAMETER);
85 }
86
87 if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_BUFFER_FIELD) {
88 /*
89 * If the buffer_field arguments have not been previously evaluated,
90 * evaluate them now and save the results.
91 */
92 if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
93 status = acpi_ds_get_buffer_field_arguments(obj_desc);
94 if (ACPI_FAILURE(status)) {
95 return_ACPI_STATUS(status);
96 }
97 }
98 } else
99 if ((ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_REGION_FIELD)
100 && (obj_desc->field.region_obj->region.space_id ==
101 ACPI_ADR_SPACE_SMBUS)) {
102 /*
103 * This is an SMBus read. We must create a buffer to hold the data
104 * and directly access the region handler.
105 */
106 buffer_desc =
107 acpi_ut_create_buffer_object(ACPI_SMBUS_BUFFER_SIZE);
108 if (!buffer_desc) {
109 return_ACPI_STATUS(AE_NO_MEMORY);
110 }
111
112 /* Lock entire transaction if requested */
113
114 acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
115
116 /*
117 * Perform the read.
118 * Note: Smbus protocol value is passed in upper 16-bits of Function
119 */
120 status = acpi_ex_access_region(obj_desc, 0,
121 ACPI_CAST_PTR(acpi_integer,
122 buffer_desc->
123 buffer.pointer),
124 ACPI_READ | (obj_desc->field.
125 attribute << 16));
126 acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
127 goto exit;
128 }
129
130 /*
131 * Allocate a buffer for the contents of the field.
132 *
133 * If the field is larger than the size of an acpi_integer, create
134 * a BUFFER to hold it. Otherwise, use an INTEGER. This allows
135 * the use of arithmetic operators on the returned value if the
136 * field size is equal or smaller than an Integer.
137 *
138 * Note: Field.length is in bits.
139 */
140 length =
141 (acpi_size) ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.bit_length);
142 if (length > acpi_gbl_integer_byte_width) {
143
144 /* Field is too large for an Integer, create a Buffer instead */
145
146 buffer_desc = acpi_ut_create_buffer_object(length);
147 if (!buffer_desc) {
148 return_ACPI_STATUS(AE_NO_MEMORY);
149 }
150 buffer = buffer_desc->buffer.pointer;
151 } else {
152 /* Field will fit within an Integer (normal case) */
153
154 buffer_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
155 if (!buffer_desc) {
156 return_ACPI_STATUS(AE_NO_MEMORY);
157 }
158
159 length = acpi_gbl_integer_byte_width;
160 buffer_desc->integer.value = 0;
161 buffer = &buffer_desc->integer.value;
162 }
163
164 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
165 "FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n",
166 obj_desc, ACPI_GET_OBJECT_TYPE(obj_desc), buffer,
167 (u32) length));
168 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
169 "FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n",
170 obj_desc->common_field.bit_length,
171 obj_desc->common_field.start_field_bit_offset,
172 obj_desc->common_field.base_byte_offset));
173
174 /* Lock entire transaction if requested */
175
176 acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
177
178 /* Read from the field */
179
180 status = acpi_ex_extract_from_field(obj_desc, buffer, (u32) length);
181 acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
182
183 exit:
184 if (ACPI_FAILURE(status)) {
185 acpi_ut_remove_reference(buffer_desc);
186 } else {
187 *ret_buffer_desc = buffer_desc;
188 }
189
190 return_ACPI_STATUS(status);
191}
192
193/*******************************************************************************
194 *
195 * FUNCTION: acpi_ex_write_data_to_field
196 *
197 * PARAMETERS: source_desc - Contains data to write
198 * obj_desc - The named field
199 * result_desc - Where the return value is returned, if any
200 *
201 * RETURN: Status
202 *
203 * DESCRIPTION: Write to a named field
204 *
205 ******************************************************************************/
206
207acpi_status
208acpi_ex_write_data_to_field(union acpi_operand_object *source_desc,
209 union acpi_operand_object *obj_desc,
210 union acpi_operand_object **result_desc)
211{
212 acpi_status status;
213 u32 length;
214 void *buffer;
215 union acpi_operand_object *buffer_desc;
216
217 ACPI_FUNCTION_TRACE_PTR(ex_write_data_to_field, obj_desc);
218
219 /* Parameter validation */
220
221 if (!source_desc || !obj_desc) {
222 return_ACPI_STATUS(AE_AML_NO_OPERAND);
223 }
224
225 if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_BUFFER_FIELD) {
226 /*
227 * If the buffer_field arguments have not been previously evaluated,
228 * evaluate them now and save the results.
229 */
230 if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
231 status = acpi_ds_get_buffer_field_arguments(obj_desc);
232 if (ACPI_FAILURE(status)) {
233 return_ACPI_STATUS(status);
234 }
235 }
236 } else
237 if ((ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_REGION_FIELD)
238 && (obj_desc->field.region_obj->region.space_id ==
239 ACPI_ADR_SPACE_SMBUS)) {
240 /*
241 * This is an SMBus write. We will bypass the entire field mechanism
242 * and handoff the buffer directly to the handler.
243 *
244 * Source must be a buffer of sufficient size (ACPI_SMBUS_BUFFER_SIZE).
245 */
246 if (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_BUFFER) {
247 ACPI_ERROR((AE_INFO,
248 "SMBus write requires Buffer, found type %s",
249 acpi_ut_get_object_type_name(source_desc)));
250
251 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
252 }
253
254 if (source_desc->buffer.length < ACPI_SMBUS_BUFFER_SIZE) {
255 ACPI_ERROR((AE_INFO,
256 "SMBus write requires Buffer of length %X, found length %X",
257 ACPI_SMBUS_BUFFER_SIZE,
258 source_desc->buffer.length));
259
260 return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
261 }
262
263 buffer_desc =
264 acpi_ut_create_buffer_object(ACPI_SMBUS_BUFFER_SIZE);
265 if (!buffer_desc) {
266 return_ACPI_STATUS(AE_NO_MEMORY);
267 }
268
269 buffer = buffer_desc->buffer.pointer;
270 ACPI_MEMCPY(buffer, source_desc->buffer.pointer,
271 ACPI_SMBUS_BUFFER_SIZE);
272
273 /* Lock entire transaction if requested */
274
275 acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
276
277 /*
278 * Perform the write (returns status and perhaps data in the
279 * same buffer)
280 * Note: SMBus protocol type is passed in upper 16-bits of Function.
281 */
282 status = acpi_ex_access_region(obj_desc, 0,
283 (acpi_integer *) buffer,
284 ACPI_WRITE | (obj_desc->field.
285 attribute << 16));
286 acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
287
288 *result_desc = buffer_desc;
289 return_ACPI_STATUS(status);
290 }
291
292 /* Get a pointer to the data to be written */
293
294 switch (ACPI_GET_OBJECT_TYPE(source_desc)) {
295 case ACPI_TYPE_INTEGER:
296 buffer = &source_desc->integer.value;
297 length = sizeof(source_desc->integer.value);
298 break;
299
300 case ACPI_TYPE_BUFFER:
301 buffer = source_desc->buffer.pointer;
302 length = source_desc->buffer.length;
303 break;
304
305 case ACPI_TYPE_STRING:
306 buffer = source_desc->string.pointer;
307 length = source_desc->string.length;
308 break;
309
310 default:
311 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
312 }
313
314 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
315 "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n",
316 source_desc,
317 acpi_ut_get_type_name(ACPI_GET_OBJECT_TYPE
318 (source_desc)),
319 ACPI_GET_OBJECT_TYPE(source_desc), buffer, length));
320
321 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
322 "FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n",
323 obj_desc,
324 acpi_ut_get_type_name(ACPI_GET_OBJECT_TYPE(obj_desc)),
325 ACPI_GET_OBJECT_TYPE(obj_desc),
326 obj_desc->common_field.bit_length,
327 obj_desc->common_field.start_field_bit_offset,
328 obj_desc->common_field.base_byte_offset));
329
330 /* Lock entire transaction if requested */
331
332 acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
333
334 /* Write to the field */
335
336 status = acpi_ex_insert_into_field(obj_desc, buffer, length);
337 acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
338
339 return_ACPI_STATUS(status);
340}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-22 12:13:00 -0500