arch/all-pc/acpica/source/components/utilities/utids.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utids - support for device IDs - HID, UID, CID
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, Intel Corp.
   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
  44 #define __UTIDS_C__
  45
  46 #include "acpi.h"
  47 #include "accommon.h"
  48 #include "acinterp.h"
  49
  50
  51 #define _COMPONENT          ACPI_UTILITIES
  52         ACPI_MODULE_NAME    ("utids")
  53
  54
  55 /*******************************************************************************
  56  *
  57  * FUNCTION:    AcpiUtExecute_HID
  58  *
  59  * PARAMETERS:  DeviceNode          - Node for the device
  60  *              ReturnId            - Where the string HID is returned
  61  *
  62  * RETURN:      Status
  63  *
  64  * DESCRIPTION: Executes the _HID control method that returns the hardware
  65  *              ID of the device. The HID is either an 32-bit encoded EISAID
  66  *              Integer or a String. A string is always returned. An EISAID
  67  *              is converted to a string.
  68  *
  69  *              NOTE: Internal function, no parameter validation
  70  *
  71  ******************************************************************************/
  72
  73 ACPI_STATUS
  74 AcpiUtExecute_HID (
  75     ACPI_NAMESPACE_NODE     *DeviceNode,
  76     ACPI_PNP_DEVICE_ID      **ReturnId)
  77 {
  78     ACPI_OPERAND_OBJECT     *ObjDesc;
  79     ACPI_PNP_DEVICE_ID      *Hid;
  80     UINT32                  Length;
  81     ACPI_STATUS             Status;
  82
  83
  84     ACPI_FUNCTION_TRACE (UtExecute_HID);
  85
  86
  87     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__HID,
  88                 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
  89     if (ACPI_FAILURE (Status))
  90     {
  91         return_ACPI_STATUS (Status);
  92     }
  93
  94     /* Get the size of the String to be returned, includes null terminator */
  95
  96     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
  97     {
  98         Length = ACPI_EISAID_STRING_SIZE;
  99     }
 100     else
 101     {
 102         Length = ObjDesc->String.Length + 1;
 103     }
 104
 105     /* Allocate a buffer for the HID */
 106
 107     Hid = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PNP_DEVICE_ID) + (ACPI_SIZE) Length);
 108     if (!Hid)
 109     {
 110         Status = AE_NO_MEMORY;
 111         goto Cleanup;
 112     }
 113
 114     /* Area for the string starts after PNP_DEVICE_ID struct */
 115
 116     Hid->String = ACPI_ADD_PTR (char, Hid, sizeof (ACPI_PNP_DEVICE_ID));
 117
 118     /* Convert EISAID to a string or simply copy existing string */
 119
 120     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 121     {
 122         AcpiExEisaIdToString (Hid->String, ObjDesc->Integer.Value);
 123     }
 124     else
 125     {
 126         ACPI_STRCPY (Hid->String, ObjDesc->String.Pointer);
 127     }
 128
 129     Hid->Length = Length;
 130     *ReturnId = Hid;
 131
 132
 133 Cleanup:
 134
 135     /* On exit, we must delete the return object */
 136
 137     AcpiUtRemoveReference (ObjDesc);
 138     return_ACPI_STATUS (Status);
 139 }
 140
 141
 142 /*******************************************************************************
 143  *
 144  * FUNCTION:    AcpiUtExecute_SUB
 145  *
 146  * PARAMETERS:  DeviceNode          - Node for the device
 147  *              ReturnId            - Where the _SUB is returned
 148  *
 149  * RETURN:      Status
 150  *
 151  * DESCRIPTION: Executes the _SUB control method that returns the subsystem
 152  *              ID of the device. The _SUB value is always a string containing
 153  *              either a valid PNP or ACPI ID.
 154  *
 155  *              NOTE: Internal function, no parameter validation
 156  *
 157  ******************************************************************************/
 158
 159 ACPI_STATUS
 160 AcpiUtExecute_SUB (
 161     ACPI_NAMESPACE_NODE     *DeviceNode,
 162     ACPI_PNP_DEVICE_ID      **ReturnId)
 163 {
 164     ACPI_OPERAND_OBJECT     *ObjDesc;
 165     ACPI_PNP_DEVICE_ID      *Sub;
 166     UINT32                  Length;
 167     ACPI_STATUS             Status;
 168
 169
 170     ACPI_FUNCTION_TRACE (UtExecute_SUB);
 171
 172
 173     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__SUB,
 174                 ACPI_BTYPE_STRING, &ObjDesc);
 175     if (ACPI_FAILURE (Status))
 176     {
 177         return_ACPI_STATUS (Status);
 178     }
 179
 180     /* Get the size of the String to be returned, includes null terminator */
 181
 182     Length = ObjDesc->String.Length + 1;
 183
 184     /* Allocate a buffer for the SUB */
 185
 186     Sub = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PNP_DEVICE_ID) + (ACPI_SIZE) Length);
 187     if (!Sub)
 188     {
 189         Status = AE_NO_MEMORY;
 190         goto Cleanup;
 191     }
 192
 193     /* Area for the string starts after PNP_DEVICE_ID struct */
 194
 195     Sub->String = ACPI_ADD_PTR (char, Sub, sizeof (ACPI_PNP_DEVICE_ID));
 196
 197     /* Simply copy existing string */
 198
 199     ACPI_STRCPY (Sub->String, ObjDesc->String.Pointer);
 200     Sub->Length = Length;
 201     *ReturnId = Sub;
 202
 203
 204 Cleanup:
 205
 206     /* On exit, we must delete the return object */
 207
 208     AcpiUtRemoveReference (ObjDesc);
 209     return_ACPI_STATUS (Status);
 210 }
 211
 212
 213 /*******************************************************************************
 214  *
 215  * FUNCTION:    AcpiUtExecute_UID
 216  *
 217  * PARAMETERS:  DeviceNode          - Node for the device
 218  *              ReturnId            - Where the string UID is returned
 219  *
 220  * RETURN:      Status
 221  *
 222  * DESCRIPTION: Executes the _UID control method that returns the unique
 223  *              ID of the device. The UID is either a 64-bit Integer (NOT an
 224  *              EISAID) or a string. Always returns a string. A 64-bit integer
 225  *              is converted to a decimal string.
 226  *
 227  *              NOTE: Internal function, no parameter validation
 228  *
 229  ******************************************************************************/
 230
 231 ACPI_STATUS
 232 AcpiUtExecute_UID (
 233     ACPI_NAMESPACE_NODE     *DeviceNode,
 234     ACPI_PNP_DEVICE_ID      **ReturnId)
 235 {
 236     ACPI_OPERAND_OBJECT     *ObjDesc;
 237     ACPI_PNP_DEVICE_ID      *Uid;
 238     UINT32                  Length;
 239     ACPI_STATUS             Status;
 240
 241
 242     ACPI_FUNCTION_TRACE (UtExecute_UID);
 243
 244
 245     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__UID,
 246                 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
 247     if (ACPI_FAILURE (Status))
 248     {
 249         return_ACPI_STATUS (Status);
 250     }
 251
 252     /* Get the size of the String to be returned, includes null terminator */
 253
 254     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 255     {
 256         Length = ACPI_MAX64_DECIMAL_DIGITS + 1;
 257     }
 258     else
 259     {
 260         Length = ObjDesc->String.Length + 1;
 261     }
 262
 263     /* Allocate a buffer for the UID */
 264
 265     Uid = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PNP_DEVICE_ID) + (ACPI_SIZE) Length);
 266     if (!Uid)
 267     {
 268         Status = AE_NO_MEMORY;
 269         goto Cleanup;
 270     }
 271
 272     /* Area for the string starts after PNP_DEVICE_ID struct */
 273
 274     Uid->String = ACPI_ADD_PTR (char, Uid, sizeof (ACPI_PNP_DEVICE_ID));
 275
 276     /* Convert an Integer to string, or just copy an existing string */
 277
 278     if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
 279     {
 280         AcpiExIntegerToString (Uid->String, ObjDesc->Integer.Value);
 281     }
 282     else
 283     {
 284         ACPI_STRCPY (Uid->String, ObjDesc->String.Pointer);
 285     }
 286
 287     Uid->Length = Length;
 288     *ReturnId = Uid;
 289
 290
 291 Cleanup:
 292
 293     /* On exit, we must delete the return object */
 294
 295     AcpiUtRemoveReference (ObjDesc);
 296     return_ACPI_STATUS (Status);
 297 }
 298
 299
 300 /*******************************************************************************
 301  *
 302  * FUNCTION:    AcpiUtExecute_CID
 303  *
 304  * PARAMETERS:  DeviceNode          - Node for the device
 305  *              ReturnCidList       - Where the CID list is returned
 306  *
 307  * RETURN:      Status, list of CID strings
 308  *
 309  * DESCRIPTION: Executes the _CID control method that returns one or more
 310  *              compatible hardware IDs for the device.
 311  *
 312  *              NOTE: Internal function, no parameter validation
 313  *
 314  * A _CID method can return either a single compatible ID or a package of
 315  * compatible IDs. Each compatible ID can be one of the following:
 316  * 1) Integer (32 bit compressed EISA ID) or
 317  * 2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss")
 318  *
 319  * The Integer CIDs are converted to string format by this function.
 320  *
 321  ******************************************************************************/
 322
 323 ACPI_STATUS
 324 AcpiUtExecute_CID (
 325     ACPI_NAMESPACE_NODE     *DeviceNode,
 326     ACPI_PNP_DEVICE_ID_LIST **ReturnCidList)
 327 {
 328     ACPI_OPERAND_OBJECT     **CidObjects;
 329     ACPI_OPERAND_OBJECT     *ObjDesc;
 330     ACPI_PNP_DEVICE_ID_LIST *CidList;
 331     char                    *NextIdString;
 332     UINT32                  StringAreaSize;
 333     UINT32                  Length;
 334     UINT32                  CidListSize;
 335     ACPI_STATUS             Status;
 336     UINT32                  Count;
 337     UINT32                  i;
 338
 339
 340     ACPI_FUNCTION_TRACE (UtExecute_CID);
 341
 342
 343     /* Evaluate the _CID method for this device */
 344
 345     Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__CID,
 346                 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | ACPI_BTYPE_PACKAGE,
 347                 &ObjDesc);
 348     if (ACPI_FAILURE (Status))
 349     {
 350         return_ACPI_STATUS (Status);
 351     }
 352
 353     /*
 354      * Get the count and size of the returned _CIDs. _CID can return either
 355      * a Package of Integers/Strings or a single Integer or String.
 356      * Note: This section also validates that all CID elements are of the
 357      * correct type (Integer or String).
 358      */
 359     if (ObjDesc->Common.Type == ACPI_TYPE_PACKAGE)
 360     {
 361         Count = ObjDesc->Package.Count;
 362         CidObjects = ObjDesc->Package.Elements;
 363     }
 364     else /* Single Integer or String CID */
 365     {
 366         Count = 1;
 367         CidObjects = &ObjDesc;
 368     }
 369
 370     StringAreaSize = 0;
 371     for (i = 0; i < Count; i++)
 372     {
 373         /* String lengths include null terminator */
 374
 375         switch (CidObjects[i]->Common.Type)
 376         {
 377         case ACPI_TYPE_INTEGER:
 378
 379             StringAreaSize += ACPI_EISAID_STRING_SIZE;
 380             break;
 381
 382         case ACPI_TYPE_STRING:
 383
 384             StringAreaSize += CidObjects[i]->String.Length + 1;
 385             break;
 386
 387         default:
 388
 389             Status = AE_TYPE;
 390             goto Cleanup;
 391         }
 392     }
 393
 394     /*
 395      * Now that we know the length of the CIDs, allocate return buffer:
 396      * 1) Size of the base structure +
 397      * 2) Size of the CID PNP_DEVICE_ID array +
 398      * 3) Size of the actual CID strings
 399      */
 400     CidListSize = sizeof (ACPI_PNP_DEVICE_ID_LIST) +
 401         ((Count - 1) * sizeof (ACPI_PNP_DEVICE_ID)) +
 402         StringAreaSize;
 403
 404     CidList = ACPI_ALLOCATE_ZEROED (CidListSize);
 405     if (!CidList)
 406     {
 407         Status = AE_NO_MEMORY;
 408         goto Cleanup;
 409     }
 410
 411     /* Area for CID strings starts after the CID PNP_DEVICE_ID array */
 412
 413     NextIdString = ACPI_CAST_PTR (char, CidList->Ids) +
 414         ((ACPI_SIZE) Count * sizeof (ACPI_PNP_DEVICE_ID));
 415
 416     /* Copy/convert the CIDs to the return buffer */
 417
 418     for (i = 0; i < Count; i++)
 419     {
 420         if (CidObjects[i]->Common.Type == ACPI_TYPE_INTEGER)
 421         {
 422             /* Convert the Integer (EISAID) CID to a string */
 423
 424             AcpiExEisaIdToString (NextIdString, CidObjects[i]->Integer.Value);
 425             Length = ACPI_EISAID_STRING_SIZE;
 426         }
 427         else /* ACPI_TYPE_STRING */
 428         {
 429             /* Copy the String CID from the returned object */
 430
 431             ACPI_STRCPY (NextIdString, CidObjects[i]->String.Pointer);
 432             Length = CidObjects[i]->String.Length + 1;
 433         }
 434
 435         CidList->Ids[i].String = NextIdString;
 436         CidList->Ids[i].Length = Length;
 437         NextIdString += Length;
 438     }
 439
 440     /* Finish the CID list */
 441
 442     CidList->Count = Count;
 443     CidList->ListSize = CidListSize;
 444     *ReturnCidList = CidList;
 445
 446
 447 Cleanup:
 448
 449     /* On exit, we must delete the _CID return object */
 450
 451     AcpiUtRemoveReference (ObjDesc);
 452     return_ACPI_STATUS (Status);
 453 }