reactos/drivers/bus/acpi/acpica/utilities/utids.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utids - support for device IDs - HID, UID, CID
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2009, 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 #define __UTIDS_C__
 117
 118 #include "acpi.h"
 119 #include "accommon.h"
 120 #include "acinterp.h"
 121
 122
 123 #define _COMPONENT          ACPI_UTILITIES
 124         ACPI_MODULE_NAME    ("utids")
 125
 126 /* Local prototypes */
 127
 128 static void
 129 AcpiUtCopyIdString (
 130     char                    *Destination,
 131     char                    *Source);
 132
 133
 134 /*******************************************************************************
 135  *
 136  * FUNCTION:    AcpiUtCopyIdString
 137  *
 138  * PARAMETERS:  Destination         - Where to copy the string
 139  *              Source              - Source string
 140  *
 141  * RETURN:      None
 142  *
 143  * DESCRIPTION: Copies an ID string for the _HID, _CID, and _UID methods.
 144  *              Performs removal of a leading asterisk if present -- workaround
 145  *              for a known issue on a bunch of machines.
 146  *
 147  ******************************************************************************/
 148
 149 static void
 150 AcpiUtCopyIdString (
 151     char                    *Destination,
 152     char                    *Source)
 153 {
 154
 155     /*
 156      * Workaround for ID strings that have a leading asterisk. This construct
 157      * is not allowed by the ACPI specification  (ID strings must be
 158      * alphanumeric), but enough existing machines have this embedded in their
 159      * ID strings that the following code is useful.
 160      */
 161     if (*Source == '*')
 162     {
 163         Source++;
 164     }
 165
 166     /* Do the actual copy */
 167
 168     ACPI_STRCPY (Destination, Source);
 169 }
 170
 171
 172 /*******************************************************************************
 173  *
 174  * FUNCTION:    AcpiUtExecute_HID
 175  *
 176  * PARAMETERS:  DeviceNode          - Node for the device
 177  *              ReturnId            - Where the string HID is returned
 178  *
 179  * RETURN:      Status
 180  *
 181  * DESCRIPTION: Executes the _HID control method that returns the hardware
 182  *              ID of the device. The HID is either an 32-bit encoded EISAID
 183  *              Integer or a String. A string is always returned. An EISAID
 184  *              is converted to a string.
 185  *
 186  *              NOTE: Internal function, no parameter validation
 187  *
 188  ******************************************************************************/
 189
 190 ACPI_STATUS
 191 AcpiUtExecute_HID (
 192     ACPI_NAMESPACE_NODE     *DeviceNode,
 193     ACPI_DEVICE_ID          **ReturnId)
 194 {
 195     ACPI_OPERAND_OBJECT     *ObjDesc;
 196     ACPI_DEVICE_ID          *Hid;
 197     UINT32                  Length;
 198     ACPI_STATUS             Status;
 199
 200
 201     ACPI_FUNCTION_TRACE (UtExecute_HID);
 202
 203
 204     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__HID,
 205                 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
 206     if (ACPI_FAILURE (Status))
 207     {
 208         return_ACPI_STATUS (Status);
 209     }
 210
 211     /* Get the size of the String to be returned, includes null terminator */
 212
 213     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 214     {
 215         Length = ACPI_EISAID_STRING_SIZE;
 216     }
 217     else
 218     {
 219         Length = ObjDesc->String.Length + 1;
 220     }
 221
 222     /* Allocate a buffer for the HID */
 223
 224     Hid = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DEVICE_ID) + (ACPI_SIZE) Length);
 225     if (!Hid)
 226     {
 227         Status = AE_NO_MEMORY;
 228         goto Cleanup;
 229     }
 230
 231     /* Area for the string starts after DEVICE_ID struct */
 232
 233     Hid->String = ACPI_ADD_PTR (char, Hid, sizeof (ACPI_DEVICE_ID));
 234
 235     /* Convert EISAID to a string or simply copy existing string */
 236
 237     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 238     {
 239         AcpiExEisaIdToString (Hid->String, ObjDesc->Integer.Value);
 240     }
 241     else
 242     {
 243         AcpiUtCopyIdString (Hid->String, ObjDesc->String.Pointer);
 244     }
 245
 246     Hid->Length = Length;
 247     *ReturnId = Hid;
 248
 249
 250 Cleanup:
 251
 252     /* On exit, we must delete the return object */
 253
 254     AcpiUtRemoveReference (ObjDesc);
 255     return_ACPI_STATUS (Status);
 256 }
 257
 258
 259 /*******************************************************************************
 260  *
 261  * FUNCTION:    AcpiUtExecute_UID
 262  *
 263  * PARAMETERS:  DeviceNode          - Node for the device
 264  *              ReturnId            - Where the string UID is returned
 265  *
 266  * RETURN:      Status
 267  *
 268  * DESCRIPTION: Executes the _UID control method that returns the unique
 269  *              ID of the device. The UID is either a 64-bit Integer (NOT an
 270  *              EISAID) or a string. Always returns a string. A 64-bit integer
 271  *              is converted to a decimal string.
 272  *
 273  *              NOTE: Internal function, no parameter validation
 274  *
 275  ******************************************************************************/
 276
 277 ACPI_STATUS
 278 AcpiUtExecute_UID (
 279     ACPI_NAMESPACE_NODE     *DeviceNode,
 280     ACPI_DEVICE_ID          **ReturnId)
 281 {
 282     ACPI_OPERAND_OBJECT     *ObjDesc;
 283     ACPI_DEVICE_ID          *Uid;
 284     UINT32                  Length;
 285     ACPI_STATUS             Status;
 286
 287
 288     ACPI_FUNCTION_TRACE (UtExecute_UID);
 289
 290
 291     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__UID,
 292                 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
 293     if (ACPI_FAILURE (Status))
 294     {
 295         return_ACPI_STATUS (Status);
 296     }
 297
 298     /* Get the size of the String to be returned, includes null terminator */
 299
 300     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 301     {
 302         Length = ACPI_MAX64_DECIMAL_DIGITS + 1;
 303     }
 304     else
 305     {
 306         Length = ObjDesc->String.Length + 1;
 307     }
 308
 309     /* Allocate a buffer for the UID */
 310
 311     Uid = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DEVICE_ID) + (ACPI_SIZE) Length);
 312     if (!Uid)
 313     {
 314         Status = AE_NO_MEMORY;
 315         goto Cleanup;
 316     }
 317
 318     /* Area for the string starts after DEVICE_ID struct */
 319
 320     Uid->String = ACPI_ADD_PTR (char, Uid, sizeof (ACPI_DEVICE_ID));
 321
 322     /* Convert an Integer to string, or just copy an existing string */
 323
 324     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 325     {
 326         AcpiExIntegerToString (Uid->String, ObjDesc->Integer.Value);
 327     }
 328     else
 329     {
 330         AcpiUtCopyIdString (Uid->String, ObjDesc->String.Pointer);
 331     }
 332
 333     Uid->Length = Length;
 334     *ReturnId = Uid;
 335
 336
 337 Cleanup:
 338
 339     /* On exit, we must delete the return object */
 340
 341     AcpiUtRemoveReference (ObjDesc);
 342     return_ACPI_STATUS (Status);
 343 }
 344
 345
 346 /*******************************************************************************
 347  *
 348  * FUNCTION:    AcpiUtExecute_CID
 349  *
 350  * PARAMETERS:  DeviceNode          - Node for the device
 351  *              ReturnCidList       - Where the CID list is returned
 352  *
 353  * RETURN:      Status, list of CID strings
 354  *
 355  * DESCRIPTION: Executes the _CID control method that returns one or more
 356  *              compatible hardware IDs for the device.
 357  *
 358  *              NOTE: Internal function, no parameter validation
 359  *
 360  * A _CID method can return either a single compatible ID or a package of
 361  * compatible IDs. Each compatible ID can be one of the following:
 362  * 1) Integer (32 bit compressed EISA ID) or
 363  * 2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss")
 364  *
 365  * The Integer CIDs are converted to string format by this function.
 366  *
 367  ******************************************************************************/
 368
 369 ACPI_STATUS
 370 AcpiUtExecute_CID (
 371     ACPI_NAMESPACE_NODE     *DeviceNode,
 372     ACPI_DEVICE_ID_LIST     **ReturnCidList)
 373 {
 374     ACPI_OPERAND_OBJECT     **CidObjects;
 375     ACPI_OPERAND_OBJECT     *ObjDesc;
 376     ACPI_DEVICE_ID_LIST     *CidList;
 377     char                    *NextIdString;
 378     UINT32                  StringAreaSize;
 379     UINT32                  Length;
 380     UINT32                  CidListSize;
 381     ACPI_STATUS             Status;
 382     UINT32                  Count;
 383     UINT32                  i;
 384
 385
 386     ACPI_FUNCTION_TRACE (UtExecute_CID);
 387
 388
 389     /* Evaluate the _CID method for this device */
 390
 391     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__CID,
 392                 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | ACPI_BTYPE_PACKAGE,
 393                 &ObjDesc);
 394     if (ACPI_FAILURE (Status))
 395     {
 396         return_ACPI_STATUS (Status);
 397     }
 398
 399     /*
 400      * Get the count and size of the returned _CIDs. _CID can return either
 401      * a Package of Integers/Strings or a single Integer or String.
 402      * Note: This section also validates that all CID elements are of the
 403      * correct type (Integer or String).
 404      */
 405     if (ObjDesc->Common.Type == ACPI_TYPE_PACKAGE)
 406     {
 407         Count = ObjDesc->Package.Count;
 408         CidObjects = ObjDesc->Package.Elements;
 409     }
 410     else /* Single Integer or String CID */
 411     {
 412         Count = 1;
 413         CidObjects = &ObjDesc;
 414     }
 415
 416     StringAreaSize = 0;
 417     for (i = 0; i < Count; i++)
 418     {
 419         /* String lengths include null terminator */
 420
 421         switch (CidObjects[i]->Common.Type)
 422         {
 423         case ACPI_TYPE_INTEGER:
 424             StringAreaSize += ACPI_EISAID_STRING_SIZE;
 425             break;
 426
 427         case ACPI_TYPE_STRING:
 428             StringAreaSize += CidObjects[i]->String.Length + 1;
 429             break;
 430
 431         default:
 432             Status = AE_TYPE;
 433             goto Cleanup;
 434         }
 435     }
 436
 437     /*
 438      * Now that we know the length of the CIDs, allocate return buffer:
 439      * 1) Size of the base structure +
 440      * 2) Size of the CID DEVICE_ID array +
 441      * 3) Size of the actual CID strings
 442      */
 443     CidListSize = sizeof (ACPI_DEVICE_ID_LIST) +
 444         ((Count - 1) * sizeof (ACPI_DEVICE_ID)) +
 445         StringAreaSize;
 446
 447     CidList = ACPI_ALLOCATE_ZEROED (CidListSize);
 448     if (!CidList)
 449     {
 450         Status = AE_NO_MEMORY;
 451         goto Cleanup;
 452     }
 453
 454     /* Area for CID strings starts after the CID DEVICE_ID array */
 455
 456     NextIdString = ACPI_CAST_PTR (char, CidList->Ids) +
 457         ((ACPI_SIZE) Count * sizeof (ACPI_DEVICE_ID));
 458
 459     /* Copy/convert the CIDs to the return buffer */
 460
 461     for (i = 0; i < Count; i++)
 462     {
 463         if (CidObjects[i]->Common.Type == ACPI_TYPE_INTEGER)
 464         {
 465             /* Convert the Integer (EISAID) CID to a string */
 466
 467             AcpiExEisaIdToString (NextIdString, CidObjects[i]->Integer.Value);
 468             Length = ACPI_EISAID_STRING_SIZE;
 469         }
 470         else /* ACPI_TYPE_STRING */
 471         {
 472             /* Copy the String CID from the returned object */
 473
 474             AcpiUtCopyIdString (NextIdString, CidObjects[i]->String.Pointer);
 475             Length = CidObjects[i]->String.Length + 1;
 476         }
 477
 478         CidList->Ids[i].String = NextIdString;
 479         CidList->Ids[i].Length = Length;
 480         NextIdString += Length;
 481     }
 482
 483     /* Finish the CID list */
 484
 485     CidList->Count = Count;
 486     CidList->ListSize = CidListSize;
 487     *ReturnCidList = CidList;
 488
 489
 490 Cleanup:
 491
 492     /* On exit, we must delete the _CID return object */
 493
 494     AcpiUtRemoveReference (ObjDesc);
 495     return_ACPI_STATUS (Status);
 496 }
 497