1 /****************************************************************************** 2 * 3 * Module Name: exfield - ACPI AML (p-code) execution - field manipulation 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "acpi.h" 153 #include "accommon.h" 154 #include "acdispat.h" 155 #include "acinterp.h" 156 #include "amlcode.h" 157 158 159 #define _COMPONENT ACPI_EXECUTER 160 ACPI_MODULE_NAME ("exfield") 161 162 /* Local prototypes */ 163 164 static UINT32 165 AcpiExGetSerialAccessLength ( 166 UINT32 AccessorType, 167 UINT32 AccessLength); 168 169 170 /******************************************************************************* 171 * 172 * FUNCTION: AcpiExGetSerialAccessLength 173 * 174 * PARAMETERS: AccessorType - The type of the protocol indicated by region 175 * field access attributes 176 * AccessLength - The access length of the region field 177 * 178 * RETURN: Decoded access length 179 * 180 * DESCRIPTION: This routine returns the length of the GenericSerialBus 181 * protocol bytes 182 * 183 ******************************************************************************/ 184 185 static UINT32 186 AcpiExGetSerialAccessLength ( 187 UINT32 AccessorType, 188 UINT32 AccessLength) 189 { 190 UINT32 Length; 191 192 193 switch (AccessorType) 194 { 195 case AML_FIELD_ATTRIB_QUICK: 196 197 Length = 0; 198 break; 199 200 case AML_FIELD_ATTRIB_SEND_RCV: 201 case AML_FIELD_ATTRIB_BYTE: 202 203 Length = 1; 204 break; 205 206 case AML_FIELD_ATTRIB_WORD: 207 case AML_FIELD_ATTRIB_WORD_CALL: 208 209 Length = 2; 210 break; 211 212 case AML_FIELD_ATTRIB_MULTIBYTE: 213 case AML_FIELD_ATTRIB_RAW_BYTES: 214 case AML_FIELD_ATTRIB_RAW_PROCESS: 215 216 Length = AccessLength; 217 break; 218 219 case AML_FIELD_ATTRIB_BLOCK: 220 case AML_FIELD_ATTRIB_BLOCK_CALL: 221 default: 222 223 Length = ACPI_GSBUS_BUFFER_SIZE - 2; 224 break; 225 } 226 227 return (Length); 228 } 229 230 231 /******************************************************************************* 232 * 233 * FUNCTION: AcpiExReadDataFromField 234 * 235 * PARAMETERS: WalkState - Current execution state 236 * ObjDesc - The named field 237 * RetBufferDesc - Where the return data object is stored 238 * 239 * RETURN: Status 240 * 241 * DESCRIPTION: Read from a named field. Returns either an Integer or a 242 * Buffer, depending on the size of the field. 243 * 244 ******************************************************************************/ 245 246 ACPI_STATUS 247 AcpiExReadDataFromField ( 248 ACPI_WALK_STATE *WalkState, 249 ACPI_OPERAND_OBJECT *ObjDesc, 250 ACPI_OPERAND_OBJECT **RetBufferDesc) 251 { 252 ACPI_STATUS Status; 253 ACPI_OPERAND_OBJECT *BufferDesc; 254 ACPI_SIZE Length; 255 void *Buffer; 256 UINT32 Function; 257 UINT16 AccessorType; 258 259 260 ACPI_FUNCTION_TRACE_PTR (ExReadDataFromField, ObjDesc); 261 262 263 /* Parameter validation */ 264 265 if (!ObjDesc) 266 { 267 return_ACPI_STATUS (AE_AML_NO_OPERAND); 268 } 269 if (!RetBufferDesc) 270 { 271 return_ACPI_STATUS (AE_BAD_PARAMETER); 272 } 273 274 if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD) 275 { 276 /* 277 * If the BufferField arguments have not been previously evaluated, 278 * evaluate them now and save the results. 279 */ 280 if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) 281 { 282 Status = AcpiDsGetBufferFieldArguments (ObjDesc); 283 if (ACPI_FAILURE (Status)) 284 { 285 return_ACPI_STATUS (Status); 286 } 287 } 288 } 289 else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 290 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS || 291 ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS || 292 ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI)) 293 { 294 /* 295 * This is an SMBus, GSBus or IPMI read. We must create a buffer to 296 * hold the data and then directly access the region handler. 297 * 298 * Note: SMBus and GSBus protocol value is passed in upper 16-bits 299 * of Function 300 */ 301 if (ObjDesc->Field.RegionObj->Region.SpaceId == 302 ACPI_ADR_SPACE_SMBUS) 303 { 304 Length = ACPI_SMBUS_BUFFER_SIZE; 305 Function = ACPI_READ | (ObjDesc->Field.Attribute << 16); 306 } 307 else if (ObjDesc->Field.RegionObj->Region.SpaceId == 308 ACPI_ADR_SPACE_GSBUS) 309 { 310 AccessorType = ObjDesc->Field.Attribute; 311 Length = AcpiExGetSerialAccessLength ( 312 AccessorType, ObjDesc->Field.AccessLength); 313 314 /* 315 * Add additional 2 bytes for the GenericSerialBus data buffer: 316 * 317 * Status; (Byte 0 of the data buffer) 318 * Length; (Byte 1 of the data buffer) 319 * Data[x-1]: (Bytes 2-x of the arbitrary length data buffer) 320 */ 321 Length += 2; 322 Function = ACPI_READ | (AccessorType << 16); 323 } 324 else /* IPMI */ 325 { 326 Length = ACPI_IPMI_BUFFER_SIZE; 327 Function = ACPI_READ; 328 } 329 330 BufferDesc = AcpiUtCreateBufferObject (Length); 331 if (!BufferDesc) 332 { 333 return_ACPI_STATUS (AE_NO_MEMORY); 334 } 335 336 /* Lock entire transaction if requested */ 337 338 AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 339 340 /* Call the region handler for the read */ 341 342 Status = AcpiExAccessRegion (ObjDesc, 0, 343 ACPI_CAST_PTR (UINT64, BufferDesc->Buffer.Pointer), Function); 344 345 AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 346 goto Exit; 347 } 348 349 /* 350 * Allocate a buffer for the contents of the field. 351 * 352 * If the field is larger than the current integer width, create 353 * a BUFFER to hold it. Otherwise, use an INTEGER. This allows 354 * the use of arithmetic operators on the returned value if the 355 * field size is equal or smaller than an Integer. 356 * 357 * Note: Field.length is in bits. 358 */ 359 Length = (ACPI_SIZE) ACPI_ROUND_BITS_UP_TO_BYTES ( 360 ObjDesc->Field.BitLength); 361 362 if (Length > AcpiGbl_IntegerByteWidth) 363 { 364 /* Field is too large for an Integer, create a Buffer instead */ 365 366 BufferDesc = AcpiUtCreateBufferObject (Length); 367 if (!BufferDesc) 368 { 369 return_ACPI_STATUS (AE_NO_MEMORY); 370 } 371 Buffer = BufferDesc->Buffer.Pointer; 372 } 373 else 374 { 375 /* Field will fit within an Integer (normal case) */ 376 377 BufferDesc = AcpiUtCreateIntegerObject ((UINT64) 0); 378 if (!BufferDesc) 379 { 380 return_ACPI_STATUS (AE_NO_MEMORY); 381 } 382 383 Length = AcpiGbl_IntegerByteWidth; 384 Buffer = &BufferDesc->Integer.Value; 385 } 386 387 if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 388 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GPIO)) 389 { 390 /* 391 * For GPIO (GeneralPurposeIo), the Address will be the bit offset 392 * from the previous Connection() operator, making it effectively a 393 * pin number index. The BitLength is the length of the field, which 394 * is thus the number of pins. 395 */ 396 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 397 "GPIO FieldRead [FROM]: Pin %u Bits %u\n", 398 ObjDesc->Field.PinNumberIndex, ObjDesc->Field.BitLength)); 399 400 /* Lock entire transaction if requested */ 401 402 AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 403 404 /* Perform the write */ 405 406 Status = AcpiExAccessRegion ( 407 ObjDesc, 0, (UINT64 *) Buffer, ACPI_READ); 408 409 AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 410 if (ACPI_FAILURE (Status)) 411 { 412 AcpiUtRemoveReference (BufferDesc); 413 } 414 else 415 { 416 *RetBufferDesc = BufferDesc; 417 } 418 return_ACPI_STATUS (Status); 419 } 420 421 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 422 "FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n", 423 ObjDesc, ObjDesc->Common.Type, Buffer, (UINT32) Length)); 424 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 425 "FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n", 426 ObjDesc->CommonField.BitLength, 427 ObjDesc->CommonField.StartFieldBitOffset, 428 ObjDesc->CommonField.BaseByteOffset)); 429 430 /* Lock entire transaction if requested */ 431 432 AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 433 434 /* Read from the field */ 435 436 Status = AcpiExExtractFromField (ObjDesc, Buffer, (UINT32) Length); 437 AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 438 439 440 Exit: 441 if (ACPI_FAILURE (Status)) 442 { 443 AcpiUtRemoveReference (BufferDesc); 444 } 445 else 446 { 447 *RetBufferDesc = BufferDesc; 448 } 449 450 return_ACPI_STATUS (Status); 451 } 452 453 454 /******************************************************************************* 455 * 456 * FUNCTION: AcpiExWriteDataToField 457 * 458 * PARAMETERS: SourceDesc - Contains data to write 459 * ObjDesc - The named field 460 * ResultDesc - Where the return value is returned, if any 461 * 462 * RETURN: Status 463 * 464 * DESCRIPTION: Write to a named field 465 * 466 ******************************************************************************/ 467 468 ACPI_STATUS 469 AcpiExWriteDataToField ( 470 ACPI_OPERAND_OBJECT *SourceDesc, 471 ACPI_OPERAND_OBJECT *ObjDesc, 472 ACPI_OPERAND_OBJECT **ResultDesc) 473 { 474 ACPI_STATUS Status; 475 UINT32 Length; 476 void *Buffer; 477 ACPI_OPERAND_OBJECT *BufferDesc; 478 UINT32 Function; 479 UINT16 AccessorType; 480 481 482 ACPI_FUNCTION_TRACE_PTR (ExWriteDataToField, ObjDesc); 483 484 485 /* Parameter validation */ 486 487 if (!SourceDesc || !ObjDesc) 488 { 489 return_ACPI_STATUS (AE_AML_NO_OPERAND); 490 } 491 492 if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD) 493 { 494 /* 495 * If the BufferField arguments have not been previously evaluated, 496 * evaluate them now and save the results. 497 */ 498 if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) 499 { 500 Status = AcpiDsGetBufferFieldArguments (ObjDesc); 501 if (ACPI_FAILURE (Status)) 502 { 503 return_ACPI_STATUS (Status); 504 } 505 } 506 } 507 else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 508 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS || 509 ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS || 510 ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI)) 511 { 512 /* 513 * This is an SMBus, GSBus or IPMI write. We will bypass the entire 514 * field mechanism and handoff the buffer directly to the handler. 515 * For these address spaces, the buffer is bi-directional; on a 516 * write, return data is returned in the same buffer. 517 * 518 * Source must be a buffer of sufficient size: 519 * ACPI_SMBUS_BUFFER_SIZE, ACPI_GSBUS_BUFFER_SIZE, or 520 * ACPI_IPMI_BUFFER_SIZE. 521 * 522 * Note: SMBus and GSBus protocol type is passed in upper 16-bits 523 * of Function 524 */ 525 if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER) 526 { 527 ACPI_ERROR ((AE_INFO, 528 "SMBus/IPMI/GenericSerialBus write requires " 529 "Buffer, found type %s", 530 AcpiUtGetObjectTypeName (SourceDesc))); 531 532 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 533 } 534 535 if (ObjDesc->Field.RegionObj->Region.SpaceId == 536 ACPI_ADR_SPACE_SMBUS) 537 { 538 Length = ACPI_SMBUS_BUFFER_SIZE; 539 Function = ACPI_WRITE | (ObjDesc->Field.Attribute << 16); 540 } 541 else if (ObjDesc->Field.RegionObj->Region.SpaceId == 542 ACPI_ADR_SPACE_GSBUS) 543 { 544 AccessorType = ObjDesc->Field.Attribute; 545 Length = AcpiExGetSerialAccessLength ( 546 AccessorType, ObjDesc->Field.AccessLength); 547 548 /* 549 * Add additional 2 bytes for the GenericSerialBus data buffer: 550 * 551 * Status; (Byte 0 of the data buffer) 552 * Length; (Byte 1 of the data buffer) 553 * Data[x-1]: (Bytes 2-x of the arbitrary length data buffer) 554 */ 555 Length += 2; 556 Function = ACPI_WRITE | (AccessorType << 16); 557 } 558 else /* IPMI */ 559 { 560 Length = ACPI_IPMI_BUFFER_SIZE; 561 Function = ACPI_WRITE; 562 } 563 564 if (SourceDesc->Buffer.Length < Length) 565 { 566 ACPI_ERROR ((AE_INFO, 567 "SMBus/IPMI/GenericSerialBus write requires " 568 "Buffer of length %u, found length %u", 569 Length, SourceDesc->Buffer.Length)); 570 571 return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); 572 } 573 574 /* Create the bi-directional buffer */ 575 576 BufferDesc = AcpiUtCreateBufferObject (Length); 577 if (!BufferDesc) 578 { 579 return_ACPI_STATUS (AE_NO_MEMORY); 580 } 581 582 Buffer = BufferDesc->Buffer.Pointer; 583 memcpy (Buffer, SourceDesc->Buffer.Pointer, Length); 584 585 /* Lock entire transaction if requested */ 586 587 AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 588 589 /* 590 * Perform the write (returns status and perhaps data in the 591 * same buffer) 592 */ 593 Status = AcpiExAccessRegion ( 594 ObjDesc, 0, (UINT64 *) Buffer, Function); 595 AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 596 597 *ResultDesc = BufferDesc; 598 return_ACPI_STATUS (Status); 599 } 600 else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 601 (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GPIO)) 602 { 603 /* 604 * For GPIO (GeneralPurposeIo), we will bypass the entire field 605 * mechanism and handoff the bit address and bit width directly to 606 * the handler. The Address will be the bit offset 607 * from the previous Connection() operator, making it effectively a 608 * pin number index. The BitLength is the length of the field, which 609 * is thus the number of pins. 610 */ 611 if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER) 612 { 613 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 614 } 615 616 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 617 "GPIO FieldWrite [FROM]: (%s:%X), Val %.8X [TO]: Pin %u Bits %u\n", 618 AcpiUtGetTypeName (SourceDesc->Common.Type), 619 SourceDesc->Common.Type, (UINT32) SourceDesc->Integer.Value, 620 ObjDesc->Field.PinNumberIndex, ObjDesc->Field.BitLength)); 621 622 Buffer = &SourceDesc->Integer.Value; 623 624 /* Lock entire transaction if requested */ 625 626 AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 627 628 /* Perform the write */ 629 630 Status = AcpiExAccessRegion ( 631 ObjDesc, 0, (UINT64 *) Buffer, ACPI_WRITE); 632 AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 633 return_ACPI_STATUS (Status); 634 } 635 636 /* Get a pointer to the data to be written */ 637 638 switch (SourceDesc->Common.Type) 639 { 640 case ACPI_TYPE_INTEGER: 641 642 Buffer = &SourceDesc->Integer.Value; 643 Length = sizeof (SourceDesc->Integer.Value); 644 break; 645 646 case ACPI_TYPE_BUFFER: 647 648 Buffer = SourceDesc->Buffer.Pointer; 649 Length = SourceDesc->Buffer.Length; 650 break; 651 652 case ACPI_TYPE_STRING: 653 654 Buffer = SourceDesc->String.Pointer; 655 Length = SourceDesc->String.Length; 656 break; 657 658 default: 659 660 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 661 } 662 663 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 664 "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n", 665 SourceDesc, AcpiUtGetTypeName (SourceDesc->Common.Type), 666 SourceDesc->Common.Type, Buffer, Length)); 667 668 ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 669 "FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n", 670 ObjDesc, AcpiUtGetTypeName (ObjDesc->Common.Type), 671 ObjDesc->Common.Type, 672 ObjDesc->CommonField.BitLength, 673 ObjDesc->CommonField.StartFieldBitOffset, 674 ObjDesc->CommonField.BaseByteOffset)); 675 676 /* Lock entire transaction if requested */ 677 678 AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 679 680 /* Write to the field */ 681 682 Status = AcpiExInsertIntoField (ObjDesc, Buffer, Length); 683 AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 684 685 return_ACPI_STATUS (Status); 686 } 687