![Bob Moore](/assets/img/avatar_default.png)
Add 2010 copyright to all module headers and signons, including the Linux header. This affects virtually every file in the ACPICA core subsystem, iASL compiler, and all utilities. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
383 lines
11 KiB
C
383 lines
11 KiB
C
/******************************************************************************
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*
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* Module Name: utids - support for device IDs - HID, UID, CID
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2010, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utids")
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/* Local prototypes */
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static void acpi_ut_copy_id_string(char *destination, char *source);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_copy_id_string
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*
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* PARAMETERS: Destination - Where to copy the string
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* Source - Source string
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*
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* RETURN: None
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*
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* DESCRIPTION: Copies an ID string for the _HID, _CID, and _UID methods.
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* Performs removal of a leading asterisk if present -- workaround
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* for a known issue on a bunch of machines.
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*
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******************************************************************************/
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static void acpi_ut_copy_id_string(char *destination, char *source)
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{
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/*
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* Workaround for ID strings that have a leading asterisk. This construct
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* is not allowed by the ACPI specification (ID strings must be
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* alphanumeric), but enough existing machines have this embedded in their
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* ID strings that the following code is useful.
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*/
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if (*source == '*') {
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source++;
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}
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/* Do the actual copy */
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ACPI_STRCPY(destination, source);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_execute_HID
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*
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* PARAMETERS: device_node - Node for the device
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* return_id - Where the string HID is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes the _HID control method that returns the hardware
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* ID of the device. The HID is either an 32-bit encoded EISAID
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* Integer or a String. A string is always returned. An EISAID
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* is converted to a string.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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acpi_status
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acpi_ut_execute_HID(struct acpi_namespace_node *device_node,
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struct acpica_device_id **return_id)
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{
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union acpi_operand_object *obj_desc;
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struct acpica_device_id *hid;
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u32 length;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ut_execute_HID);
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status = acpi_ut_evaluate_object(device_node, METHOD_NAME__HID,
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ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING,
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&obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Get the size of the String to be returned, includes null terminator */
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if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
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length = ACPI_EISAID_STRING_SIZE;
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} else {
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length = obj_desc->string.length + 1;
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}
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/* Allocate a buffer for the HID */
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hid =
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ACPI_ALLOCATE_ZEROED(sizeof(struct acpica_device_id) +
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(acpi_size) length);
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if (!hid) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Area for the string starts after DEVICE_ID struct */
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hid->string = ACPI_ADD_PTR(char, hid, sizeof(struct acpica_device_id));
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/* Convert EISAID to a string or simply copy existing string */
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if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
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acpi_ex_eisa_id_to_string(hid->string, obj_desc->integer.value);
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} else {
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acpi_ut_copy_id_string(hid->string, obj_desc->string.pointer);
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}
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hid->length = length;
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*return_id = hid;
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cleanup:
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/* On exit, we must delete the return object */
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_execute_UID
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*
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* PARAMETERS: device_node - Node for the device
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* return_id - Where the string UID is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes the _UID control method that returns the unique
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* ID of the device. The UID is either a 64-bit Integer (NOT an
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* EISAID) or a string. Always returns a string. A 64-bit integer
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* is converted to a decimal string.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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acpi_status
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acpi_ut_execute_UID(struct acpi_namespace_node *device_node,
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struct acpica_device_id **return_id)
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{
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union acpi_operand_object *obj_desc;
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struct acpica_device_id *uid;
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u32 length;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ut_execute_UID);
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status = acpi_ut_evaluate_object(device_node, METHOD_NAME__UID,
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ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING,
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&obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Get the size of the String to be returned, includes null terminator */
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if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
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length = ACPI_MAX64_DECIMAL_DIGITS + 1;
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} else {
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length = obj_desc->string.length + 1;
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}
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/* Allocate a buffer for the UID */
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uid =
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ACPI_ALLOCATE_ZEROED(sizeof(struct acpica_device_id) +
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(acpi_size) length);
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if (!uid) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Area for the string starts after DEVICE_ID struct */
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uid->string = ACPI_ADD_PTR(char, uid, sizeof(struct acpica_device_id));
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/* Convert an Integer to string, or just copy an existing string */
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if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
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acpi_ex_integer_to_string(uid->string, obj_desc->integer.value);
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} else {
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acpi_ut_copy_id_string(uid->string, obj_desc->string.pointer);
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}
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uid->length = length;
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*return_id = uid;
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cleanup:
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/* On exit, we must delete the return object */
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_execute_CID
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*
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* PARAMETERS: device_node - Node for the device
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* return_cid_list - Where the CID list is returned
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*
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* RETURN: Status, list of CID strings
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*
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* DESCRIPTION: Executes the _CID control method that returns one or more
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* compatible hardware IDs for the device.
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*
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* NOTE: Internal function, no parameter validation
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*
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* A _CID method can return either a single compatible ID or a package of
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* compatible IDs. Each compatible ID can be one of the following:
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* 1) Integer (32 bit compressed EISA ID) or
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* 2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss")
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*
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* The Integer CIDs are converted to string format by this function.
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*
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******************************************************************************/
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acpi_status
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acpi_ut_execute_CID(struct acpi_namespace_node *device_node,
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struct acpica_device_id_list **return_cid_list)
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{
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union acpi_operand_object **cid_objects;
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union acpi_operand_object *obj_desc;
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struct acpica_device_id_list *cid_list;
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char *next_id_string;
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u32 string_area_size;
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u32 length;
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u32 cid_list_size;
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acpi_status status;
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u32 count;
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u32 i;
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ACPI_FUNCTION_TRACE(ut_execute_CID);
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/* Evaluate the _CID method for this device */
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status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CID,
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ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING
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| ACPI_BTYPE_PACKAGE, &obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* Get the count and size of the returned _CIDs. _CID can return either
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* a Package of Integers/Strings or a single Integer or String.
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* Note: This section also validates that all CID elements are of the
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* correct type (Integer or String).
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*/
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if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
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count = obj_desc->package.count;
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cid_objects = obj_desc->package.elements;
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} else { /* Single Integer or String CID */
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count = 1;
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cid_objects = &obj_desc;
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}
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string_area_size = 0;
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for (i = 0; i < count; i++) {
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/* String lengths include null terminator */
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switch (cid_objects[i]->common.type) {
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case ACPI_TYPE_INTEGER:
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string_area_size += ACPI_EISAID_STRING_SIZE;
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break;
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case ACPI_TYPE_STRING:
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string_area_size += cid_objects[i]->string.length + 1;
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break;
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default:
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status = AE_TYPE;
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goto cleanup;
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}
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}
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/*
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* Now that we know the length of the CIDs, allocate return buffer:
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* 1) Size of the base structure +
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* 2) Size of the CID DEVICE_ID array +
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* 3) Size of the actual CID strings
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*/
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cid_list_size = sizeof(struct acpica_device_id_list) +
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((count - 1) * sizeof(struct acpica_device_id)) + string_area_size;
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cid_list = ACPI_ALLOCATE_ZEROED(cid_list_size);
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if (!cid_list) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Area for CID strings starts after the CID DEVICE_ID array */
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next_id_string = ACPI_CAST_PTR(char, cid_list->ids) +
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((acpi_size) count * sizeof(struct acpica_device_id));
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/* Copy/convert the CIDs to the return buffer */
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for (i = 0; i < count; i++) {
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if (cid_objects[i]->common.type == ACPI_TYPE_INTEGER) {
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/* Convert the Integer (EISAID) CID to a string */
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acpi_ex_eisa_id_to_string(next_id_string,
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cid_objects[i]->integer.
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value);
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length = ACPI_EISAID_STRING_SIZE;
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} else { /* ACPI_TYPE_STRING */
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/* Copy the String CID from the returned object */
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acpi_ut_copy_id_string(next_id_string,
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cid_objects[i]->string.pointer);
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length = cid_objects[i]->string.length + 1;
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}
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cid_list->ids[i].string = next_id_string;
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cid_list->ids[i].length = length;
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next_id_string += length;
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}
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/* Finish the CID list */
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cid_list->count = count;
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cid_list->list_size = cid_list_size;
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*return_cid_list = cid_list;
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cleanup:
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/* On exit, we must delete the _CID return object */
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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