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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exfield - ACPI AML (p-code) execution - field manipulation | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
82a80941 | 8 | * Copyright (C) 2000 - 2015, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acdispat.h" | |
47 | #include "acinterp.h" | |
6273f00e | 48 | #include "amlcode.h" |
1da177e4 | 49 | |
1da177e4 | 50 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 51 | ACPI_MODULE_NAME("exfield") |
1da177e4 | 52 | |
6273f00e LZ |
53 | /* Local prototypes */ |
54 | static u32 | |
55 | acpi_ex_get_serial_access_length(u32 accessor_type, u32 access_length); | |
56 | ||
57 | /******************************************************************************* | |
58 | * | |
c0469129 | 59 | * FUNCTION: acpi_ex_get_serial_access_length |
6273f00e LZ |
60 | * |
61 | * PARAMETERS: accessor_type - The type of the protocol indicated by region | |
62 | * field access attributes | |
63 | * access_length - The access length of the region field | |
64 | * | |
65 | * RETURN: Decoded access length | |
66 | * | |
67 | * DESCRIPTION: This routine returns the length of the generic_serial_bus | |
68 | * protocol bytes | |
69 | * | |
70 | ******************************************************************************/ | |
71 | ||
72 | static u32 | |
73 | acpi_ex_get_serial_access_length(u32 accessor_type, u32 access_length) | |
74 | { | |
75 | u32 length; | |
76 | ||
77 | switch (accessor_type) { | |
78 | case AML_FIELD_ATTRIB_QUICK: | |
79 | ||
80 | length = 0; | |
81 | break; | |
82 | ||
83 | case AML_FIELD_ATTRIB_SEND_RCV: | |
84 | case AML_FIELD_ATTRIB_BYTE: | |
85 | ||
86 | length = 1; | |
87 | break; | |
88 | ||
89 | case AML_FIELD_ATTRIB_WORD: | |
90 | case AML_FIELD_ATTRIB_WORD_CALL: | |
91 | ||
92 | length = 2; | |
93 | break; | |
94 | ||
95 | case AML_FIELD_ATTRIB_MULTIBYTE: | |
96 | case AML_FIELD_ATTRIB_RAW_BYTES: | |
97 | case AML_FIELD_ATTRIB_RAW_PROCESS: | |
98 | ||
99 | length = access_length; | |
100 | break; | |
101 | ||
102 | case AML_FIELD_ATTRIB_BLOCK: | |
103 | case AML_FIELD_ATTRIB_BLOCK_CALL: | |
104 | default: | |
105 | ||
c0469129 | 106 | length = ACPI_GSBUS_BUFFER_SIZE - 2; |
6273f00e LZ |
107 | break; |
108 | } | |
109 | ||
110 | return (length); | |
111 | } | |
112 | ||
1da177e4 LT |
113 | /******************************************************************************* |
114 | * | |
115 | * FUNCTION: acpi_ex_read_data_from_field | |
116 | * | |
117 | * PARAMETERS: walk_state - Current execution state | |
118 | * obj_desc - The named field | |
119 | * ret_buffer_desc - Where the return data object is stored | |
120 | * | |
121 | * RETURN: Status | |
122 | * | |
73a3090a | 123 | * DESCRIPTION: Read from a named field. Returns either an Integer or a |
1da177e4 LT |
124 | * Buffer, depending on the size of the field. |
125 | * | |
126 | ******************************************************************************/ | |
6273f00e | 127 | |
1da177e4 | 128 | acpi_status |
6273f00e | 129 | acpi_ex_read_data_from_field(struct acpi_walk_state * walk_state, |
4be44fcd LB |
130 | union acpi_operand_object *obj_desc, |
131 | union acpi_operand_object **ret_buffer_desc) | |
1da177e4 | 132 | { |
4be44fcd LB |
133 | acpi_status status; |
134 | union acpi_operand_object *buffer_desc; | |
135 | acpi_size length; | |
136 | void *buffer; | |
6557a49a | 137 | u32 function; |
6273f00e | 138 | u16 accessor_type; |
1da177e4 | 139 | |
b229cf92 | 140 | ACPI_FUNCTION_TRACE_PTR(ex_read_data_from_field, obj_desc); |
1da177e4 LT |
141 | |
142 | /* Parameter validation */ | |
143 | ||
144 | if (!obj_desc) { | |
4be44fcd | 145 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
1da177e4 | 146 | } |
88ac00f5 | 147 | if (!ret_buffer_desc) { |
4be44fcd | 148 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
88ac00f5 | 149 | } |
1da177e4 | 150 | |
3371c19c | 151 | if (obj_desc->common.type == ACPI_TYPE_BUFFER_FIELD) { |
1da177e4 LT |
152 | /* |
153 | * If the buffer_field arguments have not been previously evaluated, | |
154 | * evaluate them now and save the results. | |
155 | */ | |
156 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { | |
4be44fcd LB |
157 | status = acpi_ds_get_buffer_field_arguments(obj_desc); |
158 | if (ACPI_FAILURE(status)) { | |
159 | return_ACPI_STATUS(status); | |
1da177e4 LT |
160 | } |
161 | } | |
3371c19c BM |
162 | } else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && |
163 | (obj_desc->field.region_obj->region.space_id == | |
6557a49a LM |
164 | ACPI_ADR_SPACE_SMBUS |
165 | || obj_desc->field.region_obj->region.space_id == | |
2da120b6 BM |
166 | ACPI_ADR_SPACE_GSBUS |
167 | || obj_desc->field.region_obj->region.space_id == | |
6557a49a | 168 | ACPI_ADR_SPACE_IPMI)) { |
1da177e4 | 169 | /* |
2da120b6 | 170 | * This is an SMBus, GSBus or IPMI read. We must create a buffer to hold |
6557a49a LM |
171 | * the data and then directly access the region handler. |
172 | * | |
2da120b6 | 173 | * Note: SMBus and GSBus protocol value is passed in upper 16-bits of Function |
1da177e4 | 174 | */ |
6557a49a LM |
175 | if (obj_desc->field.region_obj->region.space_id == |
176 | ACPI_ADR_SPACE_SMBUS) { | |
177 | length = ACPI_SMBUS_BUFFER_SIZE; | |
178 | function = | |
179 | ACPI_READ | (obj_desc->field.attribute << 16); | |
2da120b6 BM |
180 | } else if (obj_desc->field.region_obj->region.space_id == |
181 | ACPI_ADR_SPACE_GSBUS) { | |
6273f00e LZ |
182 | accessor_type = obj_desc->field.attribute; |
183 | length = acpi_ex_get_serial_access_length(accessor_type, | |
184 | obj_desc-> | |
185 | field. | |
186 | access_length); | |
187 | ||
188 | /* | |
d38bb002 BM |
189 | * Add additional 2 bytes for the generic_serial_bus data buffer: |
190 | * | |
191 | * Status; (Byte 0 of the data buffer) | |
192 | * Length; (Byte 1 of the data buffer) | |
193 | * Data[x-1]; (Bytes 2-x of the arbitrary length data buffer) | |
6273f00e LZ |
194 | */ |
195 | length += 2; | |
196 | function = ACPI_READ | (accessor_type << 16); | |
6557a49a LM |
197 | } else { /* IPMI */ |
198 | ||
199 | length = ACPI_IPMI_BUFFER_SIZE; | |
200 | function = ACPI_READ; | |
201 | } | |
202 | ||
203 | buffer_desc = acpi_ut_create_buffer_object(length); | |
1da177e4 | 204 | if (!buffer_desc) { |
4be44fcd | 205 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
206 | } |
207 | ||
208 | /* Lock entire transaction if requested */ | |
209 | ||
ba886cd4 | 210 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
1da177e4 | 211 | |
6557a49a LM |
212 | /* Call the region handler for the read */ |
213 | ||
4be44fcd | 214 | status = acpi_ex_access_region(obj_desc, 0, |
5df7e6cb | 215 | ACPI_CAST_PTR(u64, |
4be44fcd LB |
216 | buffer_desc-> |
217 | buffer.pointer), | |
6557a49a | 218 | function); |
f02e9fa1 | 219 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
220 | goto exit; |
221 | } | |
222 | ||
223 | /* | |
224 | * Allocate a buffer for the contents of the field. | |
225 | * | |
5df7e6cb | 226 | * If the field is larger than the current integer width, create |
73a3090a | 227 | * a BUFFER to hold it. Otherwise, use an INTEGER. This allows |
1da177e4 LT |
228 | * the use of arithmetic operators on the returned value if the |
229 | * field size is equal or smaller than an Integer. | |
230 | * | |
231 | * Note: Field.length is in bits. | |
232 | */ | |
4be44fcd LB |
233 | length = |
234 | (acpi_size) ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.bit_length); | |
1da177e4 | 235 | if (length > acpi_gbl_integer_byte_width) { |
52fc0b02 | 236 | |
1da177e4 LT |
237 | /* Field is too large for an Integer, create a Buffer instead */ |
238 | ||
4be44fcd | 239 | buffer_desc = acpi_ut_create_buffer_object(length); |
1da177e4 | 240 | if (!buffer_desc) { |
4be44fcd | 241 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
242 | } |
243 | buffer = buffer_desc->buffer.pointer; | |
4be44fcd | 244 | } else { |
1da177e4 LT |
245 | /* Field will fit within an Integer (normal case) */ |
246 | ||
dc95a270 | 247 | buffer_desc = acpi_ut_create_integer_object((u64) 0); |
1da177e4 | 248 | if (!buffer_desc) { |
4be44fcd | 249 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
250 | } |
251 | ||
252 | length = acpi_gbl_integer_byte_width; | |
1da177e4 LT |
253 | buffer = &buffer_desc->integer.value; |
254 | } | |
255 | ||
75ec6e55 BM |
256 | if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && |
257 | (obj_desc->field.region_obj->region.space_id == | |
258 | ACPI_ADR_SPACE_GPIO)) { | |
259 | /* | |
260 | * For GPIO (general_purpose_io), the Address will be the bit offset | |
261 | * from the previous Connection() operator, making it effectively a | |
262 | * pin number index. The bit_length is the length of the field, which | |
263 | * is thus the number of pins. | |
264 | */ | |
265 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, | |
266 | "GPIO FieldRead [FROM]: Pin %u Bits %u\n", | |
267 | obj_desc->field.pin_number_index, | |
268 | obj_desc->field.bit_length)); | |
269 | ||
270 | /* Lock entire transaction if requested */ | |
271 | ||
272 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); | |
273 | ||
274 | /* Perform the write */ | |
275 | ||
276 | status = acpi_ex_access_region(obj_desc, 0, | |
277 | (u64 *)buffer, ACPI_READ); | |
278 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); | |
279 | if (ACPI_FAILURE(status)) { | |
280 | acpi_ut_remove_reference(buffer_desc); | |
281 | } else { | |
282 | *ret_buffer_desc = buffer_desc; | |
283 | } | |
284 | return_ACPI_STATUS(status); | |
285 | } | |
286 | ||
4be44fcd | 287 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, |
b229cf92 | 288 | "FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n", |
3371c19c | 289 | obj_desc, obj_desc->common.type, buffer, |
4be44fcd LB |
290 | (u32) length)); |
291 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, | |
b229cf92 | 292 | "FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n", |
4be44fcd LB |
293 | obj_desc->common_field.bit_length, |
294 | obj_desc->common_field.start_field_bit_offset, | |
295 | obj_desc->common_field.base_byte_offset)); | |
1da177e4 LT |
296 | |
297 | /* Lock entire transaction if requested */ | |
298 | ||
ba886cd4 | 299 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
300 | |
301 | /* Read from the field */ | |
302 | ||
4be44fcd | 303 | status = acpi_ex_extract_from_field(obj_desc, buffer, (u32) length); |
f02e9fa1 | 304 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
1da177e4 | 305 | |
10622bf8 | 306 | exit: |
4be44fcd LB |
307 | if (ACPI_FAILURE(status)) { |
308 | acpi_ut_remove_reference(buffer_desc); | |
309 | } else { | |
1da177e4 LT |
310 | *ret_buffer_desc = buffer_desc; |
311 | } | |
312 | ||
4be44fcd | 313 | return_ACPI_STATUS(status); |
1da177e4 LT |
314 | } |
315 | ||
1da177e4 LT |
316 | /******************************************************************************* |
317 | * | |
318 | * FUNCTION: acpi_ex_write_data_to_field | |
319 | * | |
320 | * PARAMETERS: source_desc - Contains data to write | |
321 | * obj_desc - The named field | |
44f6c012 | 322 | * result_desc - Where the return value is returned, if any |
1da177e4 LT |
323 | * |
324 | * RETURN: Status | |
325 | * | |
326 | * DESCRIPTION: Write to a named field | |
327 | * | |
328 | ******************************************************************************/ | |
329 | ||
330 | acpi_status | |
4be44fcd LB |
331 | acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, |
332 | union acpi_operand_object *obj_desc, | |
333 | union acpi_operand_object **result_desc) | |
1da177e4 | 334 | { |
4be44fcd LB |
335 | acpi_status status; |
336 | u32 length; | |
4be44fcd | 337 | void *buffer; |
4be44fcd | 338 | union acpi_operand_object *buffer_desc; |
6557a49a | 339 | u32 function; |
6273f00e | 340 | u16 accessor_type; |
1da177e4 | 341 | |
b229cf92 | 342 | ACPI_FUNCTION_TRACE_PTR(ex_write_data_to_field, obj_desc); |
1da177e4 LT |
343 | |
344 | /* Parameter validation */ | |
345 | ||
346 | if (!source_desc || !obj_desc) { | |
4be44fcd | 347 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
1da177e4 LT |
348 | } |
349 | ||
3371c19c | 350 | if (obj_desc->common.type == ACPI_TYPE_BUFFER_FIELD) { |
1da177e4 LT |
351 | /* |
352 | * If the buffer_field arguments have not been previously evaluated, | |
353 | * evaluate them now and save the results. | |
354 | */ | |
355 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { | |
4be44fcd LB |
356 | status = acpi_ds_get_buffer_field_arguments(obj_desc); |
357 | if (ACPI_FAILURE(status)) { | |
358 | return_ACPI_STATUS(status); | |
1da177e4 LT |
359 | } |
360 | } | |
3371c19c BM |
361 | } else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && |
362 | (obj_desc->field.region_obj->region.space_id == | |
6557a49a LM |
363 | ACPI_ADR_SPACE_SMBUS |
364 | || obj_desc->field.region_obj->region.space_id == | |
2da120b6 BM |
365 | ACPI_ADR_SPACE_GSBUS |
366 | || obj_desc->field.region_obj->region.space_id == | |
6557a49a | 367 | ACPI_ADR_SPACE_IPMI)) { |
1da177e4 | 368 | /* |
2da120b6 | 369 | * This is an SMBus, GSBus or IPMI write. We will bypass the entire field |
6557a49a LM |
370 | * mechanism and handoff the buffer directly to the handler. For |
371 | * these address spaces, the buffer is bi-directional; on a write, | |
372 | * return data is returned in the same buffer. | |
373 | * | |
374 | * Source must be a buffer of sufficient size: | |
2da120b6 | 375 | * ACPI_SMBUS_BUFFER_SIZE, ACPI_GSBUS_BUFFER_SIZE, or ACPI_IPMI_BUFFER_SIZE. |
1da177e4 | 376 | * |
2da120b6 | 377 | * Note: SMBus and GSBus protocol type is passed in upper 16-bits of Function |
1da177e4 | 378 | */ |
3371c19c | 379 | if (source_desc->common.type != ACPI_TYPE_BUFFER) { |
b8e4d893 | 380 | ACPI_ERROR((AE_INFO, |
2da120b6 | 381 | "SMBus/IPMI/GenericSerialBus write requires Buffer, found type %s", |
b8e4d893 | 382 | acpi_ut_get_object_type_name(source_desc))); |
44f6c012 | 383 | |
4be44fcd | 384 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
385 | } |
386 | ||
6557a49a LM |
387 | if (obj_desc->field.region_obj->region.space_id == |
388 | ACPI_ADR_SPACE_SMBUS) { | |
389 | length = ACPI_SMBUS_BUFFER_SIZE; | |
390 | function = | |
391 | ACPI_WRITE | (obj_desc->field.attribute << 16); | |
2da120b6 BM |
392 | } else if (obj_desc->field.region_obj->region.space_id == |
393 | ACPI_ADR_SPACE_GSBUS) { | |
6273f00e LZ |
394 | accessor_type = obj_desc->field.attribute; |
395 | length = acpi_ex_get_serial_access_length(accessor_type, | |
396 | obj_desc-> | |
397 | field. | |
398 | access_length); | |
399 | ||
400 | /* | |
d38bb002 BM |
401 | * Add additional 2 bytes for the generic_serial_bus data buffer: |
402 | * | |
403 | * Status; (Byte 0 of the data buffer) | |
404 | * Length; (Byte 1 of the data buffer) | |
405 | * Data[x-1]; (Bytes 2-x of the arbitrary length data buffer) | |
6273f00e LZ |
406 | */ |
407 | length += 2; | |
408 | function = ACPI_WRITE | (accessor_type << 16); | |
6557a49a LM |
409 | } else { /* IPMI */ |
410 | ||
411 | length = ACPI_IPMI_BUFFER_SIZE; | |
412 | function = ACPI_WRITE; | |
413 | } | |
414 | ||
415 | if (source_desc->buffer.length < length) { | |
b8e4d893 | 416 | ACPI_ERROR((AE_INFO, |
2da120b6 | 417 | "SMBus/IPMI/GenericSerialBus write requires Buffer of length %u, found length %u", |
6557a49a | 418 | length, source_desc->buffer.length)); |
44f6c012 | 419 | |
4be44fcd | 420 | return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); |
1da177e4 LT |
421 | } |
422 | ||
6557a49a LM |
423 | /* Create the bi-directional buffer */ |
424 | ||
425 | buffer_desc = acpi_ut_create_buffer_object(length); | |
1da177e4 | 426 | if (!buffer_desc) { |
4be44fcd | 427 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
428 | } |
429 | ||
430 | buffer = buffer_desc->buffer.pointer; | |
4fa4616e | 431 | memcpy(buffer, source_desc->buffer.pointer, length); |
1da177e4 LT |
432 | |
433 | /* Lock entire transaction if requested */ | |
434 | ||
ba886cd4 | 435 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
436 | |
437 | /* | |
44f6c012 RM |
438 | * Perform the write (returns status and perhaps data in the |
439 | * same buffer) | |
1da177e4 | 440 | */ |
4be44fcd | 441 | status = acpi_ex_access_region(obj_desc, 0, |
5df7e6cb | 442 | (u64 *) buffer, function); |
f02e9fa1 | 443 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
444 | |
445 | *result_desc = buffer_desc; | |
4be44fcd | 446 | return_ACPI_STATUS(status); |
75ec6e55 BM |
447 | } else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && |
448 | (obj_desc->field.region_obj->region.space_id == | |
449 | ACPI_ADR_SPACE_GPIO)) { | |
450 | /* | |
451 | * For GPIO (general_purpose_io), we will bypass the entire field | |
452 | * mechanism and handoff the bit address and bit width directly to | |
453 | * the handler. The Address will be the bit offset | |
454 | * from the previous Connection() operator, making it effectively a | |
455 | * pin number index. The bit_length is the length of the field, which | |
456 | * is thus the number of pins. | |
457 | */ | |
458 | if (source_desc->common.type != ACPI_TYPE_INTEGER) { | |
459 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
460 | } | |
461 | ||
462 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, | |
463 | "GPIO FieldWrite [FROM]: (%s:%X), Val %.8X [TO]: Pin %u Bits %u\n", | |
464 | acpi_ut_get_type_name(source_desc->common. | |
465 | type), | |
466 | source_desc->common.type, | |
467 | (u32)source_desc->integer.value, | |
468 | obj_desc->field.pin_number_index, | |
469 | obj_desc->field.bit_length)); | |
470 | ||
471 | buffer = &source_desc->integer.value; | |
472 | ||
473 | /* Lock entire transaction if requested */ | |
474 | ||
475 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); | |
476 | ||
477 | /* Perform the write */ | |
478 | ||
479 | status = acpi_ex_access_region(obj_desc, 0, | |
480 | (u64 *)buffer, ACPI_WRITE); | |
481 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); | |
482 | return_ACPI_STATUS(status); | |
1da177e4 LT |
483 | } |
484 | ||
44f6c012 RM |
485 | /* Get a pointer to the data to be written */ |
486 | ||
3371c19c | 487 | switch (source_desc->common.type) { |
1da177e4 | 488 | case ACPI_TYPE_INTEGER: |
1d1ea1b7 | 489 | |
1da177e4 | 490 | buffer = &source_desc->integer.value; |
4be44fcd | 491 | length = sizeof(source_desc->integer.value); |
1da177e4 LT |
492 | break; |
493 | ||
494 | case ACPI_TYPE_BUFFER: | |
1d1ea1b7 | 495 | |
1da177e4 LT |
496 | buffer = source_desc->buffer.pointer; |
497 | length = source_desc->buffer.length; | |
498 | break; | |
499 | ||
500 | case ACPI_TYPE_STRING: | |
1d1ea1b7 | 501 | |
1da177e4 LT |
502 | buffer = source_desc->string.pointer; |
503 | length = source_desc->string.length; | |
504 | break; | |
505 | ||
506 | default: | |
1d1ea1b7 | 507 | |
4be44fcd | 508 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
509 | } |
510 | ||
4be44fcd | 511 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, |
b229cf92 | 512 | "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n", |
4be44fcd | 513 | source_desc, |
3371c19c BM |
514 | acpi_ut_get_type_name(source_desc->common.type), |
515 | source_desc->common.type, buffer, length)); | |
4be44fcd LB |
516 | |
517 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, | |
b229cf92 | 518 | "FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n", |
4be44fcd | 519 | obj_desc, |
3371c19c BM |
520 | acpi_ut_get_type_name(obj_desc->common.type), |
521 | obj_desc->common.type, | |
4be44fcd LB |
522 | obj_desc->common_field.bit_length, |
523 | obj_desc->common_field.start_field_bit_offset, | |
524 | obj_desc->common_field.base_byte_offset)); | |
1da177e4 LT |
525 | |
526 | /* Lock entire transaction if requested */ | |
527 | ||
ba886cd4 | 528 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
529 | |
530 | /* Write to the field */ | |
531 | ||
4be44fcd | 532 | status = acpi_ex_insert_into_field(obj_desc, buffer, length); |
f02e9fa1 | 533 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
1da177e4 | 534 | |
4be44fcd | 535 | return_ACPI_STATUS(status); |
1da177e4 | 536 | } |