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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exfield - ACPI AML (p-code) execution - field manipulation | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, 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 |
f5c1e1c5 | 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 | /* |
1fad8738 BM |
170 | * This is an SMBus, GSBus or IPMI read. We must create a buffer to |
171 | * hold the data and then directly access the region handler. | |
6557a49a | 172 | * |
1fad8738 BM |
173 | * Note: SMBus and GSBus protocol value is passed in upper 16-bits |
174 | * of Function | |
1da177e4 | 175 | */ |
6557a49a LM |
176 | if (obj_desc->field.region_obj->region.space_id == |
177 | ACPI_ADR_SPACE_SMBUS) { | |
178 | length = ACPI_SMBUS_BUFFER_SIZE; | |
179 | function = | |
180 | ACPI_READ | (obj_desc->field.attribute << 16); | |
2da120b6 BM |
181 | } else if (obj_desc->field.region_obj->region.space_id == |
182 | ACPI_ADR_SPACE_GSBUS) { | |
6273f00e | 183 | accessor_type = obj_desc->field.attribute; |
1fad8738 BM |
184 | length = |
185 | acpi_ex_get_serial_access_length(accessor_type, | |
186 | obj_desc->field. | |
187 | access_length); | |
6273f00e LZ |
188 | |
189 | /* | |
d38bb002 BM |
190 | * Add additional 2 bytes for the generic_serial_bus data buffer: |
191 | * | |
1fad8738 BM |
192 | * Status; (Byte 0 of the data buffer) |
193 | * Length; (Byte 1 of the data buffer) | |
194 | * Data[x-1]: (Bytes 2-x of the arbitrary length data buffer) | |
6273f00e LZ |
195 | */ |
196 | length += 2; | |
197 | function = ACPI_READ | (accessor_type << 16); | |
6557a49a LM |
198 | } else { /* IPMI */ |
199 | ||
200 | length = ACPI_IPMI_BUFFER_SIZE; | |
201 | function = ACPI_READ; | |
202 | } | |
203 | ||
204 | buffer_desc = acpi_ut_create_buffer_object(length); | |
1da177e4 | 205 | if (!buffer_desc) { |
4be44fcd | 206 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
207 | } |
208 | ||
209 | /* Lock entire transaction if requested */ | |
210 | ||
ba886cd4 | 211 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
1da177e4 | 212 | |
6557a49a LM |
213 | /* Call the region handler for the read */ |
214 | ||
4be44fcd | 215 | status = acpi_ex_access_region(obj_desc, 0, |
5df7e6cb | 216 | ACPI_CAST_PTR(u64, |
4be44fcd LB |
217 | buffer_desc-> |
218 | buffer.pointer), | |
6557a49a | 219 | function); |
1fad8738 | 220 | |
f02e9fa1 | 221 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
222 | goto exit; |
223 | } | |
224 | ||
225 | /* | |
226 | * Allocate a buffer for the contents of the field. | |
227 | * | |
5df7e6cb | 228 | * If the field is larger than the current integer width, create |
73a3090a | 229 | * a BUFFER to hold it. Otherwise, use an INTEGER. This allows |
1da177e4 LT |
230 | * the use of arithmetic operators on the returned value if the |
231 | * field size is equal or smaller than an Integer. | |
232 | * | |
233 | * Note: Field.length is in bits. | |
234 | */ | |
4be44fcd | 235 | length = |
f5c1e1c5 | 236 | (acpi_size)ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.bit_length); |
1fad8738 | 237 | |
1da177e4 | 238 | if (length > acpi_gbl_integer_byte_width) { |
52fc0b02 | 239 | |
1da177e4 LT |
240 | /* Field is too large for an Integer, create a Buffer instead */ |
241 | ||
4be44fcd | 242 | buffer_desc = acpi_ut_create_buffer_object(length); |
1da177e4 | 243 | if (!buffer_desc) { |
4be44fcd | 244 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
245 | } |
246 | buffer = buffer_desc->buffer.pointer; | |
4be44fcd | 247 | } else { |
1da177e4 LT |
248 | /* Field will fit within an Integer (normal case) */ |
249 | ||
dc95a270 | 250 | buffer_desc = acpi_ut_create_integer_object((u64) 0); |
1da177e4 | 251 | if (!buffer_desc) { |
4be44fcd | 252 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
253 | } |
254 | ||
255 | length = acpi_gbl_integer_byte_width; | |
1da177e4 LT |
256 | buffer = &buffer_desc->integer.value; |
257 | } | |
258 | ||
75ec6e55 BM |
259 | if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && |
260 | (obj_desc->field.region_obj->region.space_id == | |
261 | ACPI_ADR_SPACE_GPIO)) { | |
262 | /* | |
263 | * For GPIO (general_purpose_io), the Address will be the bit offset | |
264 | * from the previous Connection() operator, making it effectively a | |
265 | * pin number index. The bit_length is the length of the field, which | |
266 | * is thus the number of pins. | |
267 | */ | |
268 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, | |
269 | "GPIO FieldRead [FROM]: Pin %u Bits %u\n", | |
270 | obj_desc->field.pin_number_index, | |
271 | obj_desc->field.bit_length)); | |
272 | ||
273 | /* Lock entire transaction if requested */ | |
274 | ||
275 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); | |
276 | ||
277 | /* Perform the write */ | |
278 | ||
1fad8738 BM |
279 | status = |
280 | acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, | |
281 | ACPI_READ); | |
282 | ||
75ec6e55 BM |
283 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
284 | if (ACPI_FAILURE(status)) { | |
285 | acpi_ut_remove_reference(buffer_desc); | |
286 | } else { | |
287 | *ret_buffer_desc = buffer_desc; | |
288 | } | |
289 | return_ACPI_STATUS(status); | |
290 | } | |
291 | ||
4be44fcd | 292 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, |
b229cf92 | 293 | "FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n", |
3371c19c | 294 | obj_desc, obj_desc->common.type, buffer, |
4be44fcd LB |
295 | (u32) length)); |
296 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, | |
b229cf92 | 297 | "FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n", |
4be44fcd LB |
298 | obj_desc->common_field.bit_length, |
299 | obj_desc->common_field.start_field_bit_offset, | |
300 | obj_desc->common_field.base_byte_offset)); | |
1da177e4 LT |
301 | |
302 | /* Lock entire transaction if requested */ | |
303 | ||
ba886cd4 | 304 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
305 | |
306 | /* Read from the field */ | |
307 | ||
4be44fcd | 308 | status = acpi_ex_extract_from_field(obj_desc, buffer, (u32) length); |
f02e9fa1 | 309 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
1da177e4 | 310 | |
10622bf8 | 311 | exit: |
4be44fcd LB |
312 | if (ACPI_FAILURE(status)) { |
313 | acpi_ut_remove_reference(buffer_desc); | |
314 | } else { | |
1da177e4 LT |
315 | *ret_buffer_desc = buffer_desc; |
316 | } | |
317 | ||
4be44fcd | 318 | return_ACPI_STATUS(status); |
1da177e4 LT |
319 | } |
320 | ||
1da177e4 LT |
321 | /******************************************************************************* |
322 | * | |
323 | * FUNCTION: acpi_ex_write_data_to_field | |
324 | * | |
325 | * PARAMETERS: source_desc - Contains data to write | |
326 | * obj_desc - The named field | |
44f6c012 | 327 | * result_desc - Where the return value is returned, if any |
1da177e4 LT |
328 | * |
329 | * RETURN: Status | |
330 | * | |
331 | * DESCRIPTION: Write to a named field | |
332 | * | |
333 | ******************************************************************************/ | |
334 | ||
335 | acpi_status | |
4be44fcd LB |
336 | acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, |
337 | union acpi_operand_object *obj_desc, | |
338 | union acpi_operand_object **result_desc) | |
1da177e4 | 339 | { |
4be44fcd LB |
340 | acpi_status status; |
341 | u32 length; | |
4be44fcd | 342 | void *buffer; |
4be44fcd | 343 | union acpi_operand_object *buffer_desc; |
6557a49a | 344 | u32 function; |
6273f00e | 345 | u16 accessor_type; |
1da177e4 | 346 | |
b229cf92 | 347 | ACPI_FUNCTION_TRACE_PTR(ex_write_data_to_field, obj_desc); |
1da177e4 LT |
348 | |
349 | /* Parameter validation */ | |
350 | ||
351 | if (!source_desc || !obj_desc) { | |
4be44fcd | 352 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
1da177e4 LT |
353 | } |
354 | ||
3371c19c | 355 | if (obj_desc->common.type == ACPI_TYPE_BUFFER_FIELD) { |
1da177e4 LT |
356 | /* |
357 | * If the buffer_field arguments have not been previously evaluated, | |
358 | * evaluate them now and save the results. | |
359 | */ | |
360 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { | |
4be44fcd LB |
361 | status = acpi_ds_get_buffer_field_arguments(obj_desc); |
362 | if (ACPI_FAILURE(status)) { | |
363 | return_ACPI_STATUS(status); | |
1da177e4 LT |
364 | } |
365 | } | |
3371c19c BM |
366 | } else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && |
367 | (obj_desc->field.region_obj->region.space_id == | |
6557a49a LM |
368 | ACPI_ADR_SPACE_SMBUS |
369 | || obj_desc->field.region_obj->region.space_id == | |
2da120b6 BM |
370 | ACPI_ADR_SPACE_GSBUS |
371 | || obj_desc->field.region_obj->region.space_id == | |
6557a49a | 372 | ACPI_ADR_SPACE_IPMI)) { |
1da177e4 | 373 | /* |
1fad8738 BM |
374 | * This is an SMBus, GSBus or IPMI write. We will bypass the entire |
375 | * field mechanism and handoff the buffer directly to the handler. | |
376 | * For these address spaces, the buffer is bi-directional; on a | |
377 | * write, return data is returned in the same buffer. | |
6557a49a LM |
378 | * |
379 | * Source must be a buffer of sufficient size: | |
1fad8738 BM |
380 | * ACPI_SMBUS_BUFFER_SIZE, ACPI_GSBUS_BUFFER_SIZE, or |
381 | * ACPI_IPMI_BUFFER_SIZE. | |
1da177e4 | 382 | * |
1fad8738 BM |
383 | * Note: SMBus and GSBus protocol type is passed in upper 16-bits |
384 | * of Function | |
1da177e4 | 385 | */ |
3371c19c | 386 | if (source_desc->common.type != ACPI_TYPE_BUFFER) { |
b8e4d893 | 387 | ACPI_ERROR((AE_INFO, |
1fad8738 BM |
388 | "SMBus/IPMI/GenericSerialBus write requires " |
389 | "Buffer, found type %s", | |
b8e4d893 | 390 | acpi_ut_get_object_type_name(source_desc))); |
44f6c012 | 391 | |
4be44fcd | 392 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
393 | } |
394 | ||
6557a49a LM |
395 | if (obj_desc->field.region_obj->region.space_id == |
396 | ACPI_ADR_SPACE_SMBUS) { | |
397 | length = ACPI_SMBUS_BUFFER_SIZE; | |
398 | function = | |
399 | ACPI_WRITE | (obj_desc->field.attribute << 16); | |
2da120b6 BM |
400 | } else if (obj_desc->field.region_obj->region.space_id == |
401 | ACPI_ADR_SPACE_GSBUS) { | |
6273f00e | 402 | accessor_type = obj_desc->field.attribute; |
1fad8738 BM |
403 | length = |
404 | acpi_ex_get_serial_access_length(accessor_type, | |
405 | obj_desc->field. | |
406 | access_length); | |
6273f00e LZ |
407 | |
408 | /* | |
d38bb002 BM |
409 | * Add additional 2 bytes for the generic_serial_bus data buffer: |
410 | * | |
1fad8738 BM |
411 | * Status; (Byte 0 of the data buffer) |
412 | * Length; (Byte 1 of the data buffer) | |
413 | * Data[x-1]: (Bytes 2-x of the arbitrary length data buffer) | |
6273f00e LZ |
414 | */ |
415 | length += 2; | |
416 | function = ACPI_WRITE | (accessor_type << 16); | |
6557a49a LM |
417 | } else { /* IPMI */ |
418 | ||
419 | length = ACPI_IPMI_BUFFER_SIZE; | |
420 | function = ACPI_WRITE; | |
421 | } | |
422 | ||
423 | if (source_desc->buffer.length < length) { | |
b8e4d893 | 424 | ACPI_ERROR((AE_INFO, |
1fad8738 BM |
425 | "SMBus/IPMI/GenericSerialBus write requires " |
426 | "Buffer of length %u, found length %u", | |
6557a49a | 427 | length, source_desc->buffer.length)); |
44f6c012 | 428 | |
4be44fcd | 429 | return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); |
1da177e4 LT |
430 | } |
431 | ||
6557a49a LM |
432 | /* Create the bi-directional buffer */ |
433 | ||
434 | buffer_desc = acpi_ut_create_buffer_object(length); | |
1da177e4 | 435 | if (!buffer_desc) { |
4be44fcd | 436 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
437 | } |
438 | ||
439 | buffer = buffer_desc->buffer.pointer; | |
4fa4616e | 440 | memcpy(buffer, source_desc->buffer.pointer, length); |
1da177e4 LT |
441 | |
442 | /* Lock entire transaction if requested */ | |
443 | ||
ba886cd4 | 444 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
445 | |
446 | /* | |
44f6c012 RM |
447 | * Perform the write (returns status and perhaps data in the |
448 | * same buffer) | |
1da177e4 | 449 | */ |
1fad8738 BM |
450 | status = |
451 | acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, function); | |
f02e9fa1 | 452 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
453 | |
454 | *result_desc = buffer_desc; | |
4be44fcd | 455 | return_ACPI_STATUS(status); |
75ec6e55 BM |
456 | } else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && |
457 | (obj_desc->field.region_obj->region.space_id == | |
458 | ACPI_ADR_SPACE_GPIO)) { | |
459 | /* | |
460 | * For GPIO (general_purpose_io), we will bypass the entire field | |
461 | * mechanism and handoff the bit address and bit width directly to | |
462 | * the handler. The Address will be the bit offset | |
463 | * from the previous Connection() operator, making it effectively a | |
464 | * pin number index. The bit_length is the length of the field, which | |
465 | * is thus the number of pins. | |
466 | */ | |
467 | if (source_desc->common.type != ACPI_TYPE_INTEGER) { | |
468 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
469 | } | |
470 | ||
471 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, | |
1fad8738 | 472 | "GPIO FieldWrite [FROM]: (%s:%X), Val %.8X [TO]: Pin %u Bits %u\n", |
75ec6e55 BM |
473 | acpi_ut_get_type_name(source_desc->common. |
474 | type), | |
475 | source_desc->common.type, | |
476 | (u32)source_desc->integer.value, | |
477 | obj_desc->field.pin_number_index, | |
478 | obj_desc->field.bit_length)); | |
479 | ||
480 | buffer = &source_desc->integer.value; | |
481 | ||
482 | /* Lock entire transaction if requested */ | |
483 | ||
484 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); | |
485 | ||
486 | /* Perform the write */ | |
487 | ||
1fad8738 BM |
488 | status = |
489 | acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, | |
490 | ACPI_WRITE); | |
75ec6e55 BM |
491 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
492 | return_ACPI_STATUS(status); | |
1da177e4 LT |
493 | } |
494 | ||
44f6c012 RM |
495 | /* Get a pointer to the data to be written */ |
496 | ||
3371c19c | 497 | switch (source_desc->common.type) { |
1da177e4 | 498 | case ACPI_TYPE_INTEGER: |
1d1ea1b7 | 499 | |
1da177e4 | 500 | buffer = &source_desc->integer.value; |
4be44fcd | 501 | length = sizeof(source_desc->integer.value); |
1da177e4 LT |
502 | break; |
503 | ||
504 | case ACPI_TYPE_BUFFER: | |
1d1ea1b7 | 505 | |
1da177e4 LT |
506 | buffer = source_desc->buffer.pointer; |
507 | length = source_desc->buffer.length; | |
508 | break; | |
509 | ||
510 | case ACPI_TYPE_STRING: | |
1d1ea1b7 | 511 | |
1da177e4 LT |
512 | buffer = source_desc->string.pointer; |
513 | length = source_desc->string.length; | |
514 | break; | |
515 | ||
516 | default: | |
1d1ea1b7 | 517 | |
4be44fcd | 518 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
519 | } |
520 | ||
4be44fcd | 521 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, |
b229cf92 | 522 | "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n", |
4be44fcd | 523 | source_desc, |
3371c19c BM |
524 | acpi_ut_get_type_name(source_desc->common.type), |
525 | source_desc->common.type, buffer, length)); | |
4be44fcd LB |
526 | |
527 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, | |
b229cf92 | 528 | "FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n", |
4be44fcd | 529 | obj_desc, |
3371c19c BM |
530 | acpi_ut_get_type_name(obj_desc->common.type), |
531 | obj_desc->common.type, | |
4be44fcd LB |
532 | obj_desc->common_field.bit_length, |
533 | obj_desc->common_field.start_field_bit_offset, | |
534 | obj_desc->common_field.base_byte_offset)); | |
1da177e4 LT |
535 | |
536 | /* Lock entire transaction if requested */ | |
537 | ||
ba886cd4 | 538 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
1da177e4 LT |
539 | |
540 | /* Write to the field */ | |
541 | ||
4be44fcd | 542 | status = acpi_ex_insert_into_field(obj_desc, buffer, length); |
f02e9fa1 | 543 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
1da177e4 | 544 | |
4be44fcd | 545 | return_ACPI_STATUS(status); |
1da177e4 | 546 | } |