uteval.c

linux-2.6.15.6

	status = acpi_ut_evaluate_object(device_node, METHOD_NAME__HID,
					 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING,
					 &obj_desc);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
		/* Convert the Numeric HID to string */

		acpi_ex_eisa_id_to_string((u32) obj_desc->integer.value,
					  hid->value);
	} else {
		/* Copy the String HID from the returned object */

		acpi_ut_copy_id_string(hid->value, obj_desc->string.pointer,
				       sizeof(hid->value));
	}

	/* On exit, we must delete the return object */

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_translate_one_cid
 *
 * PARAMETERS:  obj_desc            - _CID object, must be integer or string
 *              one_cid             - Where the CID string is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Return a numeric or string _CID value as a string.
 *              (Compatible ID)
 *
 *              NOTE:  Assumes a maximum _CID string length of
 *                     ACPI_MAX_CID_LENGTH.
 *
 ******************************************************************************/

static acpi_status
acpi_ut_translate_one_cid(union acpi_operand_object *obj_desc,
			  struct acpi_compatible_id *one_cid)
{

	switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
	case ACPI_TYPE_INTEGER:

		/* Convert the Numeric CID to string */

		acpi_ex_eisa_id_to_string((u32) obj_desc->integer.value,
					  one_cid->value);
		return (AE_OK);

	case ACPI_TYPE_STRING:

		if (obj_desc->string.length > ACPI_MAX_CID_LENGTH) {
			return (AE_AML_STRING_LIMIT);
		}

		/* Copy the String CID from the returned object */

		acpi_ut_copy_id_string(one_cid->value, obj_desc->string.pointer,
				       ACPI_MAX_CID_LENGTH);
		return (AE_OK);

	default:

		return (AE_TYPE);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_execute_CID
 *
 * PARAMETERS:  device_node         - Node for the device
 *              return_cid_list     - Where the CID list is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Executes the _CID control method that returns one or more
 *              compatible hardware IDs for the device.
 *
 *              NOTE: Internal function, no parameter validation
 *
 ******************************************************************************/

acpi_status
acpi_ut_execute_CID(struct acpi_namespace_node * device_node,
		    struct acpi_compatible_id_list ** return_cid_list)
{
	union acpi_operand_object *obj_desc;
	acpi_status status;
	u32 count;
	u32 size;
	struct acpi_compatible_id_list *cid_list;
	acpi_native_uint i;

	ACPI_FUNCTION_TRACE("ut_execute_CID");

	/* Evaluate the _CID method for this device */

	status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CID,
					 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING
					 | ACPI_BTYPE_PACKAGE, &obj_desc);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Get the number of _CIDs returned */

	count = 1;
	if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) {
		count = obj_desc->package.count;
	}

	/* Allocate a worst-case buffer for the _CIDs */

	size = (((count - 1) * sizeof(struct acpi_compatible_id)) +
		sizeof(struct acpi_compatible_id_list));

	cid_list = ACPI_MEM_CALLOCATE((acpi_size) size);
	if (!cid_list) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/* Init CID list */

	cid_list->count = count;
	cid_list->size = size;

	/*
	 *  A _CID can return either a single compatible ID or a package of
	 *  compatible IDs.  Each compatible ID can be one of the following:
	 *  1) Integer (32 bit compressed EISA ID) or
	 *  2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss")
	 */

	/* The _CID object can be either a single CID or a package (list) of CIDs */

	if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) {
		/* Translate each package element */

		for (i = 0; i < count; i++) {
			status =
			    acpi_ut_translate_one_cid(obj_desc->package.
						      elements[i],
						      &cid_list->id[i]);
			if (ACPI_FAILURE(status)) {
				break;
			}
		}
	} else {
		/* Only one CID, translate to a string */

		status = acpi_ut_translate_one_cid(obj_desc, cid_list->id);
	}

	/* Cleanup on error */

	if (ACPI_FAILURE(status)) {
		ACPI_MEM_FREE(cid_list);
	} else {
		*return_cid_list = cid_list;
	}

	/* On exit, we must delete the _CID return object */

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_execute_UID
 *
 * PARAMETERS:  device_node         - Node for the device
 *              Uid                 - Where the UID is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Executes the _UID control method that returns the hardware
 *              ID of the device.
 *
 *              NOTE: Internal function, no parameter validation
 *
 ******************************************************************************/

acpi_status
acpi_ut_execute_UID(struct acpi_namespace_node *device_node,
		    struct acpi_device_id *uid)
{
	union acpi_operand_object *obj_desc;
	acpi_status status;

	ACPI_FUNCTION_TRACE("ut_execute_UID");

	status = acpi_ut_evaluate_object(device_node, METHOD_NAME__UID,
					 ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING,
					 &obj_desc);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
		/* Convert the Numeric UID to string */

		acpi_ex_unsigned_integer_to_string(obj_desc->integer.value,
						   uid->value);
	} else {
		/* Copy the String UID from the returned object */

		acpi_ut_copy_id_string(uid->value, obj_desc->string.pointer,
				       sizeof(uid->value));
	}

	/* On exit, we must delete the return object */

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_execute_STA
 *
 * PARAMETERS:  device_node         - Node for the device
 *              Flags               - Where the status flags are returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Executes _STA for selected device and stores results in
 *              *Flags.
 *
 *              NOTE: Internal function, no parameter validation
 *
 ******************************************************************************/

acpi_status
acpi_ut_execute_STA(struct acpi_namespace_node *device_node, u32 * flags)
{
	union acpi_operand_object *obj_desc;
	acpi_status status;

	ACPI_FUNCTION_TRACE("ut_execute_STA");

	status = acpi_ut_evaluate_object(device_node, METHOD_NAME__STA,
					 ACPI_BTYPE_INTEGER, &obj_desc);
	if (ACPI_FAILURE(status)) {
		if (AE_NOT_FOUND == status) {
			ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
					  "_STA on %4.4s was not found, assuming device is present\n",
					  acpi_ut_get_node_name(device_node)));

			*flags = 0x0F;
			status = AE_OK;
		}

		return_ACPI_STATUS(status);
	}

	/* Extract the status flags */

	*flags = (u32) obj_desc->integer.value;

	/* On exit, we must delete the return object */

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_execute_Sxds
 *
 * PARAMETERS:  device_node         - Node for the device
 *              Flags               - Where the status flags are returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Executes _STA for selected device and stores results in
 *              *Flags.
 *
 *              NOTE: Internal function, no parameter validation
 *
 ******************************************************************************/

acpi_status
acpi_ut_execute_sxds(struct acpi_namespace_node *device_node, u8 * highest)
{
	union acpi_operand_object *obj_desc;
	acpi_status status;
	u32 i;

	ACPI_FUNCTION_TRACE("ut_execute_Sxds");

	for (i = 0; i < 4; i++) {
		highest[i] = 0xFF;
		status = acpi_ut_evaluate_object(device_node,
						 (char *)
						 acpi_gbl_highest_dstate_names
						 [i], ACPI_BTYPE_INTEGER,
						 &obj_desc);
		if (ACPI_FAILURE(status)) {
			if (status != AE_NOT_FOUND) {
				ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
						  "%s on Device %4.4s, %s\n",
						  (char *)
						  acpi_gbl_highest_dstate_names
						  [i],
						  acpi_ut_get_node_name
						  (device_node),
						  acpi_format_exception
						  (status)));

				return_ACPI_STATUS(status);
			}
		} else {
			/* Extract the Dstate value */

			highest[i] = (u8) obj_desc->integer.value;

			/* Delete the return object */

			acpi_ut_remove_reference(obj_desc);
		}
	}

	return_ACPI_STATUS(AE_OK);
}