linux/sound/pci/asihpi/hpimsginit.c
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   1/******************************************************************************
   2
   3    AudioScience HPI driver
   4    Copyright (C) 1997-2010  AudioScience Inc. <support@audioscience.com>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of version 2 of the GNU General Public License as
   8    published by the Free Software Foundation;
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18
  19 Hardware Programming Interface (HPI) Utility functions.
  20
  21 (C) Copyright AudioScience Inc. 2007
  22*******************************************************************************/
  23
  24#include "hpi_internal.h"
  25#include "hpimsginit.h"
  26
  27/* The actual message size for each object type */
  28static u16 msg_size[HPI_OBJ_MAXINDEX + 1] = HPI_MESSAGE_SIZE_BY_OBJECT;
  29/* The actual response size for each object type */
  30static u16 res_size[HPI_OBJ_MAXINDEX + 1] = HPI_RESPONSE_SIZE_BY_OBJECT;
  31/* Flag to enable alternate message type for SSX2 bypass. */
  32static u16 gwSSX2_bypass;
  33
  34/** \internal
  35  * initialize the HPI message structure
  36  */
  37static void hpi_init_message(struct hpi_message *phm, u16 object,
  38        u16 function)
  39{
  40        memset(phm, 0, sizeof(*phm));
  41        if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
  42                phm->size = msg_size[object];
  43        else
  44                phm->size = sizeof(*phm);
  45
  46        if (gwSSX2_bypass)
  47                phm->type = HPI_TYPE_SSX2BYPASS_MESSAGE;
  48        else
  49                phm->type = HPI_TYPE_MESSAGE;
  50        phm->object = object;
  51        phm->function = function;
  52        phm->version = 0;
  53        phm->adapter_index = HPI_ADAPTER_INDEX_INVALID;
  54        /* Expect actual adapter index to be set by caller */
  55}
  56
  57/** \internal
  58  * initialize the HPI response structure
  59  */
  60void hpi_init_response(struct hpi_response *phr, u16 object, u16 function,
  61        u16 error)
  62{
  63        memset(phr, 0, sizeof(*phr));
  64        phr->type = HPI_TYPE_RESPONSE;
  65        if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
  66                phr->size = res_size[object];
  67        else
  68                phr->size = sizeof(*phr);
  69        phr->object = object;
  70        phr->function = function;
  71        phr->error = error;
  72        phr->specific_error = 0;
  73        phr->version = 0;
  74}
  75
  76void hpi_init_message_response(struct hpi_message *phm,
  77        struct hpi_response *phr, u16 object, u16 function)
  78{
  79        hpi_init_message(phm, object, function);
  80        /* default error return if the response is
  81           not filled in by the callee */
  82        hpi_init_response(phr, object, function,
  83                HPI_ERROR_PROCESSING_MESSAGE);
  84}
  85
  86static void hpi_init_messageV1(struct hpi_message_header *phm, u16 size,
  87        u16 object, u16 function)
  88{
  89        memset(phm, 0, sizeof(*phm));
  90        if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
  91                phm->size = size;
  92                phm->type = HPI_TYPE_MESSAGE;
  93                phm->object = object;
  94                phm->function = function;
  95                phm->version = 1;
  96                /* Expect adapter index to be set by caller */
  97        }
  98}
  99
 100void hpi_init_responseV1(struct hpi_response_header *phr, u16 size,
 101        u16 object, u16 function)
 102{
 103        memset(phr, 0, sizeof(*phr));
 104        phr->size = size;
 105        phr->version = 1;
 106        phr->type = HPI_TYPE_RESPONSE;
 107        phr->error = HPI_ERROR_PROCESSING_MESSAGE;
 108}
 109
 110void hpi_init_message_responseV1(struct hpi_message_header *phm, u16 msg_size,
 111        struct hpi_response_header *phr, u16 res_size, u16 object,
 112        u16 function)
 113{
 114        hpi_init_messageV1(phm, msg_size, object, function);
 115        hpi_init_responseV1(phr, res_size, object, function);
 116}
 117