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- /******************************************************************************
- AudioScience HPI driver
- Copyright (C) 1997-2014 AudioScience Inc. <support@audioscience.com>
- This program is free software; you can redistribute it and/or modify
- it under the terms of version 2 of the GNU General Public License as
- published by the Free Software Foundation;
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Hardware Programming Interface (HPI) Utility functions.
- (C) Copyright AudioScience Inc. 2007
- *******************************************************************************/
- #include "hpi_internal.h"
- #include "hpimsginit.h"
- #include <linux/nospec.h>
- /* The actual message size for each object type */
- static u16 msg_size[HPI_OBJ_MAXINDEX + 1] = HPI_MESSAGE_SIZE_BY_OBJECT;
- /* The actual response size for each object type */
- static u16 res_size[HPI_OBJ_MAXINDEX + 1] = HPI_RESPONSE_SIZE_BY_OBJECT;
- /* Flag to enable alternate message type for SSX2 bypass. */
- static u16 gwSSX2_bypass;
- /** \internal
- * initialize the HPI message structure
- */
- static void hpi_init_message(struct hpi_message *phm, u16 object,
- u16 function)
- {
- u16 size;
- if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
- object = array_index_nospec(object, HPI_OBJ_MAXINDEX + 1);
- size = msg_size[object];
- } else {
- size = sizeof(*phm);
- }
- memset(phm, 0, size);
- phm->size = size;
- if (gwSSX2_bypass)
- phm->type = HPI_TYPE_SSX2BYPASS_MESSAGE;
- else
- phm->type = HPI_TYPE_REQUEST;
- phm->object = object;
- phm->function = function;
- phm->version = 0;
- phm->adapter_index = HPI_ADAPTER_INDEX_INVALID;
- /* Expect actual adapter index to be set by caller */
- }
- /** \internal
- * initialize the HPI response structure
- */
- void hpi_init_response(struct hpi_response *phr, u16 object, u16 function,
- u16 error)
- {
- u16 size;
- if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
- object = array_index_nospec(object, HPI_OBJ_MAXINDEX + 1);
- size = res_size[object];
- } else {
- size = sizeof(*phr);
- }
- memset(phr, 0, sizeof(*phr));
- phr->size = size;
- phr->type = HPI_TYPE_RESPONSE;
- phr->object = object;
- phr->function = function;
- phr->error = error;
- phr->specific_error = 0;
- phr->version = 0;
- }
- void hpi_init_message_response(struct hpi_message *phm,
- struct hpi_response *phr, u16 object, u16 function)
- {
- hpi_init_message(phm, object, function);
- /* default error return if the response is
- not filled in by the callee */
- hpi_init_response(phr, object, function,
- HPI_ERROR_PROCESSING_MESSAGE);
- }
- static void hpi_init_messageV1(struct hpi_message_header *phm, u16 size,
- u16 object, u16 function)
- {
- memset(phm, 0, size);
- if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
- phm->size = size;
- phm->type = HPI_TYPE_REQUEST;
- phm->object = object;
- phm->function = function;
- phm->version = 1;
- /* Expect adapter index to be set by caller */
- }
- }
- void hpi_init_responseV1(struct hpi_response_header *phr, u16 size,
- u16 object, u16 function)
- {
- (void)object;
- (void)function;
- memset(phr, 0, size);
- phr->size = size;
- phr->version = 1;
- phr->type = HPI_TYPE_RESPONSE;
- phr->error = HPI_ERROR_PROCESSING_MESSAGE;
- }
- void hpi_init_message_responseV1(struct hpi_message_header *phm, u16 msg_size,
- struct hpi_response_header *phr, u16 res_size, u16 object,
- u16 function)
- {
- hpi_init_messageV1(phm, msg_size, object, function);
- hpi_init_responseV1(phr, res_size, object, function);
- }
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