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 - 2011, 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
 127 /*******************************************************************************
 128  *
 129  * FUNCTION:    AcpiUtExecute_HID
 130  *
 131  * PARAMETERS:  DeviceNode          - Node for the device
 132  *              ReturnId            - Where the string HID is returned
 133  *
 134  * RETURN:      Status
 135  *
 136  * DESCRIPTION: Executes the _HID control method that returns the hardware
 137  *              ID of the device. The HID is either an 32-bit encoded EISAID
 138  *              Integer or a String. A string is always returned. An EISAID
 139  *              is converted to a string.
 140  *
 141  *              NOTE: Internal function, no parameter validation
 142  *
 143  ******************************************************************************/
 144
 145 ACPI_STATUS
 146 AcpiUtExecute_HID (
 147     ACPI_NAMESPACE_NODE     *DeviceNode,
 148     ACPI_DEVICE_ID          **ReturnId)
 149 {
 150     ACPI_OPERAND_OBJECT     *ObjDesc;
 151     ACPI_DEVICE_ID          *Hid;
 152     UINT32                  Length;
 153     ACPI_STATUS             Status;
 154
 155
 156     ACPI_FUNCTION_TRACE (UtExecute_HID);
 157
 158
 159     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__HID,
 160                 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
 161     if (ACPI_FAILURE (Status))
 162     {
 163         return_ACPI_STATUS (Status);
 164     }
 165
 166     /* Get the size of the String to be returned, includes null terminator */
 167
 168     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 169     {
 170         Length = ACPI_EISAID_STRING_SIZE;
 171     }
 172     else
 173     {
 174         Length = ObjDesc->String.Length + 1;
 175     }
 176
 177     /* Allocate a buffer for the HID */
 178
 179     Hid = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DEVICE_ID) + (ACPI_SIZE) Length);
 180     if (!Hid)
 181     {
 182         Status = AE_NO_MEMORY;
 183         goto Cleanup;
 184     }
 185
 186     /* Area for the string starts after DEVICE_ID struct */
 187
 188     Hid->String = ACPI_ADD_PTR (char, Hid, sizeof (ACPI_DEVICE_ID));
 189
 190     /* Convert EISAID to a string or simply copy existing string */
 191
 192     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 193     {
 194         AcpiExEisaIdToString (Hid->String, ObjDesc->Integer.Value);
 195     }
 196     else
 197     {
 198         ACPI_STRCPY (Hid->String, ObjDesc->String.Pointer);
 199     }
 200
 201     Hid->Length = Length;
 202     *ReturnId = Hid;
 203
 204
 205 Cleanup:
 206
 207     /* On exit, we must delete the return object */
 208
 209     AcpiUtRemoveReference (ObjDesc);
 210     return_ACPI_STATUS (Status);
 211 }
 212
 213
 214 /*******************************************************************************
 215  *
 216  * FUNCTION:    AcpiUtExecute_UID
 217  *
 218  * PARAMETERS:  DeviceNode          - Node for the device
 219  *              ReturnId            - Where the string UID is returned
 220  *
 221  * RETURN:      Status
 222  *
 223  * DESCRIPTION: Executes the _UID control method that returns the unique
 224  *              ID of the device. The UID is either a 64-bit Integer (NOT an
 225  *              EISAID) or a string. Always returns a string. A 64-bit integer
 226  *              is converted to a decimal string.
 227  *
 228  *              NOTE: Internal function, no parameter validation
 229  *
 230  ******************************************************************************/
 231
 232 ACPI_STATUS
 233 AcpiUtExecute_UID (
 234     ACPI_NAMESPACE_NODE     *DeviceNode,
 235     ACPI_DEVICE_ID          **ReturnId)
 236 {
 237     ACPI_OPERAND_OBJECT     *ObjDesc;
 238     ACPI_DEVICE_ID          *Uid;
 239     UINT32                  Length;
 240     ACPI_STATUS             Status;
 241
 242
 243     ACPI_FUNCTION_TRACE (UtExecute_UID);
 244
 245
 246     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__UID,
 247                 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
 248     if (ACPI_FAILURE (Status))
 249     {
 250         return_ACPI_STATUS (Status);
 251     }
 252
 253     /* Get the size of the String to be returned, includes null terminator */
 254
 255     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 256     {
 257         Length = ACPI_MAX64_DECIMAL_DIGITS + 1;
 258     }
 259     else
 260     {
 261         Length = ObjDesc->String.Length + 1;
 262     }
 263
 264     /* Allocate a buffer for the UID */
 265
 266     Uid = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DEVICE_ID) + (ACPI_SIZE) Length);
 267     if (!Uid)
 268     {
 269         Status = AE_NO_MEMORY;
 270         goto Cleanup;
 271     }
 272
 273     /* Area for the string starts after DEVICE_ID struct */
 274
 275     Uid->String = ACPI_ADD_PTR (char, Uid, sizeof (ACPI_DEVICE_ID));
 276
 277     /* Convert an Integer to string, or just copy an existing string */
 278
 279     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 280     {
 281         AcpiExIntegerToString (Uid->String, ObjDesc->Integer.Value);
 282     }
 283     else
 284     {
 285         ACPI_STRCPY (Uid->String, ObjDesc->String.Pointer);
 286     }
 287
 288     Uid->Length = Length;
 289     *ReturnId = Uid;
 290
 291
 292 Cleanup:
 293
 294     /* On exit, we must delete the return object */
 295
 296     AcpiUtRemoveReference (ObjDesc);
 297     return_ACPI_STATUS (Status);
 298 }
 299
 300
 301 /*******************************************************************************
 302  *
 303  * FUNCTION:    AcpiUtExecute_CID
 304  *
 305  * PARAMETERS:  DeviceNode          - Node for the device
 306  *              ReturnCidList       - Where the CID list is returned
 307  *
 308  * RETURN:      Status, list of CID strings
 309  *
 310  * DESCRIPTION: Executes the _CID control method that returns one or more
 311  *              compatible hardware IDs for the device.
 312  *
 313  *              NOTE: Internal function, no parameter validation
 314  *
 315  * A _CID method can return either a single compatible ID or a package of
 316  * compatible IDs. Each compatible ID can be one of the following:
 317  * 1) Integer (32 bit compressed EISA ID) or
 318  * 2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss")
 319  *
 320  * The Integer CIDs are converted to string format by this function.
 321  *
 322  ******************************************************************************/
 323
 324 ACPI_STATUS
 325 AcpiUtExecute_CID (
 326     ACPI_NAMESPACE_NODE     *DeviceNode,
 327     ACPI_DEVICE_ID_LIST     **ReturnCidList)
 328 {
 329     ACPI_OPERAND_OBJECT     **CidObjects;
 330     ACPI_OPERAND_OBJECT     *ObjDesc;
 331     ACPI_DEVICE_ID_LIST     *CidList;
 332     char                    *NextIdString;
 333     UINT32                  StringAreaSize;
 334     UINT32                  Length;
 335     UINT32                  CidListSize;
 336     ACPI_STATUS             Status;
 337     UINT32                  Count;
 338     UINT32                  i;
 339
 340
 341     ACPI_FUNCTION_TRACE (UtExecute_CID);
 342
 343
 344     /* Evaluate the _CID method for this device */
 345
 346     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__CID,
 347                 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | ACPI_BTYPE_PACKAGE,
 348                 &ObjDesc);
 349     if (ACPI_FAILURE (Status))
 350     {
 351         return_ACPI_STATUS (Status);
 352     }
 353
 354     /*
 355      * Get the count and size of the returned _CIDs. _CID can return either
 356      * a Package of Integers/Strings or a single Integer or String.
 357      * Note: This section also validates that all CID elements are of the
 358      * correct type (Integer or String).
 359      */
 360     if (ObjDesc->Common.Type == ACPI_TYPE_PACKAGE)
 361     {
 362         Count = ObjDesc->Package.Count;
 363         CidObjects = ObjDesc->Package.Elements;
 364     }
 365     else /* Single Integer or String CID */
 366     {
 367         Count = 1;
 368         CidObjects = &ObjDesc;
 369     }
 370
 371     StringAreaSize = 0;
 372     for (i = 0; i < Count; i++)
 373     {
 374         /* String lengths include null terminator */
 375
 376         switch (CidObjects[i]->Common.Type)
 377         {
 378         case ACPI_TYPE_INTEGER:
 379             StringAreaSize += ACPI_EISAID_STRING_SIZE;
 380             break;
 381
 382         case ACPI_TYPE_STRING:
 383             StringAreaSize += CidObjects[i]->String.Length + 1;
 384             break;
 385
 386         default:
 387             Status = AE_TYPE;
 388             goto Cleanup;
 389         }
 390     }
 391
 392     /*
 393      * Now that we know the length of the CIDs, allocate return buffer:
 394      * 1) Size of the base structure +
 395      * 2) Size of the CID DEVICE_ID array +
 396      * 3) Size of the actual CID strings
 397      */
 398     CidListSize = sizeof (ACPI_DEVICE_ID_LIST) +
 399         ((Count - 1) * sizeof (ACPI_DEVICE_ID)) +
 400         StringAreaSize;
 401
 402     CidList = ACPI_ALLOCATE_ZEROED (CidListSize);
 403     if (!CidList)
 404     {
 405         Status = AE_NO_MEMORY;
 406         goto Cleanup;
 407     }
 408
 409     /* Area for CID strings starts after the CID DEVICE_ID array */
 410
 411     NextIdString = ACPI_CAST_PTR (char, CidList->Ids) +
 412         ((ACPI_SIZE) Count * sizeof (ACPI_DEVICE_ID));
 413
 414     /* Copy/convert the CIDs to the return buffer */
 415
 416     for (i = 0; i < Count; i++)
 417     {
 418         if (CidObjects[i]->Common.Type == ACPI_TYPE_INTEGER)
 419         {
 420             /* Convert the Integer (EISAID) CID to a string */
 421
 422             AcpiExEisaIdToString (NextIdString, CidObjects[i]->Integer.Value);
 423             Length = ACPI_EISAID_STRING_SIZE;
 424         }
 425         else /* ACPI_TYPE_STRING */
 426         {
 427             /* Copy the String CID from the returned object */
 428
 429             ACPI_STRCPY (NextIdString, CidObjects[i]->String.Pointer);
 430             Length = CidObjects[i]->String.Length + 1;
 431         }
 432
 433         CidList->Ids[i].String = NextIdString;
 434         CidList->Ids[i].Length = Length;
 435         NextIdString += Length;
 436     }
 437
 438     /* Finish the CID list */
 439
 440     CidList->Count = Count;
 441     CidList->ListSize = CidListSize;
 442     *ReturnCidList = CidList;
 443
 444
 445 Cleanup:
 446
 447     /* On exit, we must delete the _CID return object */
 448
 449     AcpiUtRemoveReference (ObjDesc);
 450     return_ACPI_STATUS (Status);
 451 }
 452