[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / acpica / utids.c

/******************************************************************************
 *
 * Module Name: utids - support for device Ids - HID, UID, CID
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2013, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "acinterp.h"

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utids")

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_execute_HID
 *
 * PARAMETERS:  device_node         - Node for the device
 *              return_id           - Where the string HID is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Executes the _HID control method that returns the hardware
 *              ID of the device. The HID is either an 32-bit encoded EISAID
 *              Integer or a String. A string is always returned. An EISAID
 *              is converted to a string.
 *
 *              NOTE: Internal function, no parameter validation
 *
 ******************************************************************************/
acpi_status
acpi_ut_execute_HID(struct acpi_namespace_node *device_node,
		    struct acpi_pnp_device_id **return_id)
{
	union acpi_operand_object *obj_desc;
	struct acpi_pnp_device_id *hid;
	u32 length;
	acpi_status status;

	ACPI_FUNCTION_TRACE(ut_execute_HID);

	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);
	}

	/* Get the size of the String to be returned, includes null terminator */

	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
		length = ACPI_EISAID_STRING_SIZE;
	} else {
		length = obj_desc->string.length + 1;
	}

	/* Allocate a buffer for the HID */

	hid =
	    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
				 (acpi_size) length);
	if (!hid) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Area for the string starts after PNP_DEVICE_ID struct */

	hid->string =
	    ACPI_ADD_PTR(char, hid, sizeof(struct acpi_pnp_device_id));

	/* Convert EISAID to a string or simply copy existing string */

	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
		acpi_ex_eisa_id_to_string(hid->string, obj_desc->integer.value);
	} else {
		ACPI_STRCPY(hid->string, obj_desc->string.pointer);
	}

	hid->length = length;
	*return_id = hid;

cleanup:

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

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_execute_SUB
 *
 * PARAMETERS:  device_node         - Node for the device
 *              return_id           - Where the _SUB is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Executes the _SUB control method that returns the subsystem
 *              ID of the device. The _SUB value is always a string containing
 *              either a valid PNP or ACPI ID.
 *
 *              NOTE: Internal function, no parameter validation
 *
 ******************************************************************************/

acpi_status
acpi_ut_execute_SUB(struct acpi_namespace_node *device_node,
		    struct acpi_pnp_device_id **return_id)
{
	union acpi_operand_object *obj_desc;
	struct acpi_pnp_device_id *sub;
	u32 length;
	acpi_status status;

	ACPI_FUNCTION_TRACE(ut_execute_SUB);

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

	/* Get the size of the String to be returned, includes null terminator */

	length = obj_desc->string.length + 1;

	/* Allocate a buffer for the SUB */

	sub =
	    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
				 (acpi_size) length);
	if (!sub) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Area for the string starts after PNP_DEVICE_ID struct */

	sub->string =
	    ACPI_ADD_PTR(char, sub, sizeof(struct acpi_pnp_device_id));

	/* Simply copy existing string */

	ACPI_STRCPY(sub->string, obj_desc->string.pointer);
	sub->length = length;
	*return_id = sub;

      cleanup:

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

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_execute_UID
 *
 * PARAMETERS:  device_node         - Node for the device
 *              return_id           - Where the string UID is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Executes the _UID control method that returns the unique
 *              ID of the device. The UID is either a 64-bit Integer (NOT an
 *              EISAID) or a string. Always returns a string. A 64-bit integer
 *              is converted to a decimal string.
 *
 *              NOTE: Internal function, no parameter validation
 *
 ******************************************************************************/

acpi_status
acpi_ut_execute_UID(struct acpi_namespace_node *device_node,
		    struct acpi_pnp_device_id **return_id)
{
	union acpi_operand_object *obj_desc;
	struct acpi_pnp_device_id *uid;
	u32 length;
	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);
	}

	/* Get the size of the String to be returned, includes null terminator */

	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
		length = ACPI_MAX64_DECIMAL_DIGITS + 1;
	} else {
		length = obj_desc->string.length + 1;
	}

	/* Allocate a buffer for the UID */

	uid =
	    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
				 (acpi_size) length);
	if (!uid) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Area for the string starts after PNP_DEVICE_ID struct */

	uid->string =
	    ACPI_ADD_PTR(char, uid, sizeof(struct acpi_pnp_device_id));

	/* Convert an Integer to string, or just copy an existing string */

	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
		acpi_ex_integer_to_string(uid->string, obj_desc->integer.value);
	} else {
		ACPI_STRCPY(uid->string, obj_desc->string.pointer);
	}

	uid->length = length;
	*return_id = uid;

cleanup:

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

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_execute_CID
 *
 * PARAMETERS:  device_node         - Node for the device
 *              return_cid_list     - Where the CID list is returned
 *
 * RETURN:      Status, list of CID strings
 *
 * DESCRIPTION: Executes the _CID control method that returns one or more
 *              compatible hardware IDs for the device.
 *
 *              NOTE: Internal function, no parameter validation
 *
 * A _CID method 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 Integer CIDs are converted to string format by this function.
 *
 ******************************************************************************/

acpi_status
acpi_ut_execute_CID(struct acpi_namespace_node *device_node,
		    struct acpi_pnp_device_id_list **return_cid_list)
{
	union acpi_operand_object **cid_objects;
	union acpi_operand_object *obj_desc;
	struct acpi_pnp_device_id_list *cid_list;
	char *next_id_string;
	u32 string_area_size;
	u32 length;
	u32 cid_list_size;
	acpi_status status;
	u32 count;
	u32 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 count and size of the returned _CIDs. _CID can return either
	 * a Package of Integers/Strings or a single Integer or String.
	 * Note: This section also validates that all CID elements are of the
	 * correct type (Integer or String).
	 */
	if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
		count = obj_desc->package.count;
		cid_objects = obj_desc->package.elements;
	} else {		/* Single Integer or String CID */

		count = 1;
		cid_objects = &obj_desc;
	}

	string_area_size = 0;
	for (i = 0; i < count; i++) {

		/* String lengths include null terminator */

		switch (cid_objects[i]->common.type) {
		case ACPI_TYPE_INTEGER:
			string_area_size += ACPI_EISAID_STRING_SIZE;
			break;

		case ACPI_TYPE_STRING:
			string_area_size += cid_objects[i]->string.length + 1;
			break;

		default:
			status = AE_TYPE;
			goto cleanup;
		}
	}

	/*
	 * Now that we know the length of the CIDs, allocate return buffer:
	 * 1) Size of the base structure +
	 * 2) Size of the CID PNP_DEVICE_ID array +
	 * 3) Size of the actual CID strings
	 */
	cid_list_size = sizeof(struct acpi_pnp_device_id_list) +
	    ((count - 1) * sizeof(struct acpi_pnp_device_id)) +
	    string_area_size;

	cid_list = ACPI_ALLOCATE_ZEROED(cid_list_size);
	if (!cid_list) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Area for CID strings starts after the CID PNP_DEVICE_ID array */

	next_id_string = ACPI_CAST_PTR(char, cid_list->ids) +
	    ((acpi_size) count * sizeof(struct acpi_pnp_device_id));

	/* Copy/convert the CIDs to the return buffer */

	for (i = 0; i < count; i++) {
		if (cid_objects[i]->common.type == ACPI_TYPE_INTEGER) {

			/* Convert the Integer (EISAID) CID to a string */

			acpi_ex_eisa_id_to_string(next_id_string,
						  cid_objects[i]->integer.
						  value);
			length = ACPI_EISAID_STRING_SIZE;
		} else {	/* ACPI_TYPE_STRING */

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

			ACPI_STRCPY(next_id_string,
				    cid_objects[i]->string.pointer);
			length = cid_objects[i]->string.length + 1;
		}

		cid_list->ids[i].string = next_id_string;
		cid_list->ids[i].length = length;
		next_id_string += length;
	}

	/* Finish the CID list */

	cid_list->count = count;
	cid_list->list_size = cid_list_size;
	*return_cid_list = cid_list;

cleanup:

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

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}
Commit	Line	Data
15b8dd53 BM	1	/******************************************************************************
15b8dd53 BM	2	*
ba494bee	3	* Module Name: utids - support for device Ids - HID, UID, CID
15b8dd53 BM	4	*
	5	*****************************************************************************/
	6
	7	/*
25f044e6	8	* Copyright (C) 2000 - 2013, Intel Corp.
15b8dd53 BM	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	#include <acpi/acpi.h>
	45	#include "accommon.h"
	46	#include "acinterp.h"
	47
	48	#define _COMPONENT ACPI_UTILITIES
	49	ACPI_MODULE_NAME("utids")
	50
15b8dd53 BM	51	/*******************************************************************************
	52	*
	53	* FUNCTION: acpi_ut_execute_HID
	54	*
	55	* PARAMETERS: device_node - Node for the device
	56	* return_id - Where the string HID is returned
	57	*
	58	* RETURN: Status
	59	*
	60	* DESCRIPTION: Executes the _HID control method that returns the hardware
	61	* ID of the device. The HID is either an 32-bit encoded EISAID
	62	* Integer or a String. A string is always returned. An EISAID
	63	* is converted to a string.
	64	*
	65	* NOTE: Internal function, no parameter validation
	66	*
	67	******************************************************************************/
15b8dd53 BM	68	acpi_status
15b8dd53 BM	69	acpi_ut_execute_HID(struct acpi_namespace_node *device_node,
78e25fef	70	struct acpi_pnp_device_id **return_id)
15b8dd53 BM	71	{
15b8dd53 BM	72	union acpi_operand_object *obj_desc;
78e25fef	73	struct acpi_pnp_device_id *hid;
15b8dd53 BM	74	u32 length;
	75	acpi_status status;
	76
	77	ACPI_FUNCTION_TRACE(ut_execute_HID);
	78
	79	status = acpi_ut_evaluate_object(device_node, METHOD_NAME__HID,
	80	ACPI_BTYPE_INTEGER \| ACPI_BTYPE_STRING,
	81	&obj_desc);
	82	if (ACPI_FAILURE(status)) {
	83	return_ACPI_STATUS(status);
	84	}
	85
	86	/* Get the size of the String to be returned, includes null terminator */
	87
	88	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
	89	length = ACPI_EISAID_STRING_SIZE;
	90	} else {
	91	length = obj_desc->string.length + 1;
	92	}
	93
	94	/* Allocate a buffer for the HID */
	95
	96	hid =
78e25fef	97	ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
15b8dd53 BM	98	(acpi_size) length);
	99	if (!hid) {
	100	status = AE_NO_MEMORY;
	101	goto cleanup;
	102	}
	103
78e25fef	104	/* Area for the string starts after PNP_DEVICE_ID struct */
15b8dd53	105
78e25fef LZ	106	hid->string =
78e25fef LZ	107	ACPI_ADD_PTR(char, hid, sizeof(struct acpi_pnp_device_id));
15b8dd53 BM	108
	109	/* Convert EISAID to a string or simply copy existing string */
	110
	111	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
	112	acpi_ex_eisa_id_to_string(hid->string, obj_desc->integer.value);
	113	} else {
34cf66e7	114	ACPI_STRCPY(hid->string, obj_desc->string.pointer);
15b8dd53 BM	115	}
	116
	117	hid->length = length;
	118	*return_id = hid;
	119
	120	cleanup:
	121
	122	/* On exit, we must delete the return object */
	123
	124	acpi_ut_remove_reference(obj_desc);
	125	return_ACPI_STATUS(status);
	126	}
	127
413fc3f5 BM	128	/*******************************************************************************
	129	*
	130	* FUNCTION: acpi_ut_execute_SUB
	131	*
	132	* PARAMETERS: device_node - Node for the device
	133	* return_id - Where the _SUB is returned
	134	*
	135	* RETURN: Status
	136	*
	137	* DESCRIPTION: Executes the _SUB control method that returns the subsystem
	138	* ID of the device. The _SUB value is always a string containing
	139	* either a valid PNP or ACPI ID.
	140	*
	141	* NOTE: Internal function, no parameter validation
	142	*
	143	******************************************************************************/
	144
	145	acpi_status
	146	acpi_ut_execute_SUB(struct acpi_namespace_node *device_node,
	147	struct acpi_pnp_device_id **return_id)
	148	{
	149	union acpi_operand_object *obj_desc;
	150	struct acpi_pnp_device_id *sub;
	151	u32 length;
	152	acpi_status status;
	153
	154	ACPI_FUNCTION_TRACE(ut_execute_SUB);
	155
	156	status = acpi_ut_evaluate_object(device_node, METHOD_NAME__SUB,
	157	ACPI_BTYPE_STRING, &obj_desc);
	158	if (ACPI_FAILURE(status)) {
	159	return_ACPI_STATUS(status);
	160	}
	161
	162	/* Get the size of the String to be returned, includes null terminator */
	163
	164	length = obj_desc->string.length + 1;
	165
	166	/* Allocate a buffer for the SUB */
	167
	168	sub =
	169	ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
	170	(acpi_size) length);
	171	if (!sub) {
	172	status = AE_NO_MEMORY;
	173	goto cleanup;
	174	}
	175
	176	/* Area for the string starts after PNP_DEVICE_ID struct */
	177
	178	sub->string =
	179	ACPI_ADD_PTR(char, sub, sizeof(struct acpi_pnp_device_id));
	180
	181	/* Simply copy existing string */
	182
	183	ACPI_STRCPY(sub->string, obj_desc->string.pointer);
	184	sub->length = length;
	185	*return_id = sub;
	186
	187	cleanup:
	188
	189	/* On exit, we must delete the return object */
	190
	191	acpi_ut_remove_reference(obj_desc);
192	return_ACPI_STATUS(status);
193	}
194
15b8dd53 BM	195	/*******************************************************************************
	196	*
	197	* FUNCTION: acpi_ut_execute_UID
	198	*
	199	* PARAMETERS: device_node - Node for the device
	200	* return_id - Where the string UID is returned
	201	*
	202	* RETURN: Status
	203	*
	204	* DESCRIPTION: Executes the _UID control method that returns the unique
	205	* ID of the device. The UID is either a 64-bit Integer (NOT an
	206	* EISAID) or a string. Always returns a string. A 64-bit integer
	207	* is converted to a decimal string.
	208	*
	209	* NOTE: Internal function, no parameter validation
	210	*
	211	******************************************************************************/
	212
	213	acpi_status
	214	acpi_ut_execute_UID(struct acpi_namespace_node *device_node,
78e25fef	215	struct acpi_pnp_device_id **return_id)
15b8dd53 BM	216	{
15b8dd53 BM	217	union acpi_operand_object *obj_desc;
78e25fef	218	struct acpi_pnp_device_id *uid;
15b8dd53 BM	219	u32 length;
	220	acpi_status status;
	221
	222	ACPI_FUNCTION_TRACE(ut_execute_UID);
	223
	224	status = acpi_ut_evaluate_object(device_node, METHOD_NAME__UID,
	225	ACPI_BTYPE_INTEGER \| ACPI_BTYPE_STRING,
	226	&obj_desc);
	227	if (ACPI_FAILURE(status)) {
	228	return_ACPI_STATUS(status);
	229	}
	230
	231	/* Get the size of the String to be returned, includes null terminator */
	232
	233	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
	234	length = ACPI_MAX64_DECIMAL_DIGITS + 1;
	235	} else {
	236	length = obj_desc->string.length + 1;
	237	}
	238
	239	/* Allocate a buffer for the UID */
	240
	241	uid =
78e25fef	242	ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
15b8dd53 BM	243	(acpi_size) length);
	244	if (!uid) {
	245	status = AE_NO_MEMORY;
	246	goto cleanup;
	247	}
	248
78e25fef	249	/* Area for the string starts after PNP_DEVICE_ID struct */
15b8dd53	250
78e25fef LZ	251	uid->string =
78e25fef LZ	252	ACPI_ADD_PTR(char, uid, sizeof(struct acpi_pnp_device_id));
15b8dd53 BM	253
	254	/* Convert an Integer to string, or just copy an existing string */
	255
	256	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
	257	acpi_ex_integer_to_string(uid->string, obj_desc->integer.value);
	258	} else {
34cf66e7	259	ACPI_STRCPY(uid->string, obj_desc->string.pointer);
15b8dd53 BM	260	}
	261
	262	uid->length = length;
	263	*return_id = uid;
	264
	265	cleanup:
	266
	267	/* On exit, we must delete the return object */
	268
	269	acpi_ut_remove_reference(obj_desc);
	270	return_ACPI_STATUS(status);
	271	}
	272
	273	/*******************************************************************************
	274	*
	275	* FUNCTION: acpi_ut_execute_CID
	276	*
	277	* PARAMETERS: device_node - Node for the device
	278	* return_cid_list - Where the CID list is returned
	279	*
	280	* RETURN: Status, list of CID strings
	281	*
	282	* DESCRIPTION: Executes the _CID control method that returns one or more
	283	* compatible hardware IDs for the device.
	284	*
	285	* NOTE: Internal function, no parameter validation
	286	*
	287	* A _CID method can return either a single compatible ID or a package of
	288	* compatible IDs. Each compatible ID can be one of the following:
	289	* 1) Integer (32 bit compressed EISA ID) or
	290	* 2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss")
	291	*
	292	* The Integer CIDs are converted to string format by this function.
	293	*
	294	******************************************************************************/
	295
	296	acpi_status
	297	acpi_ut_execute_CID(struct acpi_namespace_node *device_node,
78e25fef	298	struct acpi_pnp_device_id_list **return_cid_list)
15b8dd53 BM	299	{
	300	union acpi_operand_object **cid_objects;
	301	union acpi_operand_object *obj_desc;
78e25fef	302	struct acpi_pnp_device_id_list *cid_list;
15b8dd53 BM	303	char *next_id_string;
	304	u32 string_area_size;
	305	u32 length;
	306	u32 cid_list_size;
	307	acpi_status status;
	308	u32 count;
	309	u32 i;
	310
	311	ACPI_FUNCTION_TRACE(ut_execute_CID);
	312
	313	/* Evaluate the _CID method for this device */
	314
	315	status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CID,
	316	ACPI_BTYPE_INTEGER \| ACPI_BTYPE_STRING
	317	\| ACPI_BTYPE_PACKAGE, &obj_desc);
	318	if (ACPI_FAILURE(status)) {
	319	return_ACPI_STATUS(status);
	320	}
	321
	322	/*
	323	* Get the count and size of the returned _CIDs. _CID can return either
	324	* a Package of Integers/Strings or a single Integer or String.
	325	* Note: This section also validates that all CID elements are of the
	326	* correct type (Integer or String).
	327	*/
	328	if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
	329	count = obj_desc->package.count;
	330	cid_objects = obj_desc->package.elements;
	331	} else { /* Single Integer or String CID */
	332
	333	count = 1;
	334	cid_objects = &obj_desc;
	335	}
	336
	337	string_area_size = 0;
	338	for (i = 0; i < count; i++) {
	339
	340	/* String lengths include null terminator */
	341
	342	switch (cid_objects[i]->common.type) {
	343	case ACPI_TYPE_INTEGER:
	344	string_area_size += ACPI_EISAID_STRING_SIZE;
	345	break;
	346
	347	case ACPI_TYPE_STRING:
	348	string_area_size += cid_objects[i]->string.length + 1;
	349	break;
	350
	351	default:
	352	status = AE_TYPE;
	353	goto cleanup;
	354	}
	355	}
	356
	357	/*
	358	* Now that we know the length of the CIDs, allocate return buffer:
	359	* 1) Size of the base structure +
78e25fef	360	* 2) Size of the CID PNP_DEVICE_ID array +
15b8dd53 BM	361	* 3) Size of the actual CID strings
15b8dd53 BM	362	*/
78e25fef LZ	363	cid_list_size = sizeof(struct acpi_pnp_device_id_list) +
	364	((count - 1) * sizeof(struct acpi_pnp_device_id)) +
	365	string_area_size;
15b8dd53 BM	366
	367	cid_list = ACPI_ALLOCATE_ZEROED(cid_list_size);
	368	if (!cid_list) {
	369	status = AE_NO_MEMORY;
	370	goto cleanup;
	371	}
	372
78e25fef	373	/* Area for CID strings starts after the CID PNP_DEVICE_ID array */
15b8dd53 BM	374
15b8dd53 BM	375	next_id_string = ACPI_CAST_PTR(char, cid_list->ids) +
78e25fef	376	((acpi_size) count * sizeof(struct acpi_pnp_device_id));
15b8dd53 BM	377
	378	/* Copy/convert the CIDs to the return buffer */
	379
	380	for (i = 0; i < count; i++) {
	381	if (cid_objects[i]->common.type == ACPI_TYPE_INTEGER) {
	382
	383	/* Convert the Integer (EISAID) CID to a string */
	384
	385	acpi_ex_eisa_id_to_string(next_id_string,
	386	cid_objects[i]->integer.
	387	value);
	388	length = ACPI_EISAID_STRING_SIZE;
	389	} else { /* ACPI_TYPE_STRING */
	390
	391	/* Copy the String CID from the returned object */
	392
34cf66e7 BM	393	ACPI_STRCPY(next_id_string,
34cf66e7 BM	394	cid_objects[i]->string.pointer);
15b8dd53 BM	395	length = cid_objects[i]->string.length + 1;
	396	}
	397
	398	cid_list->ids[i].string = next_id_string;
	399	cid_list->ids[i].length = length;
	400	next_id_string += length;
	401	}
	402
	403	/* Finish the CID list */
	404
	405	cid_list->count = count;
	406	cid_list->list_size = cid_list_size;
	407	*return_cid_list = cid_list;
	408
	409	cleanup:
	410
	411	/* On exit, we must delete the _CID return object */
	412
	413	acpi_ut_remove_reference(obj_desc);
	414	return_ACPI_STATUS(status);
	415	}