sound/pci/asihpi/hpimsginit.c

   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 */
  28 static u16 msg_size[HPI_OBJ_MAXINDEX + 1] = HPI_MESSAGE_SIZE_BY_OBJECT;
  29 /* The actual response size for each object type */
  30 static u16 res_size[HPI_OBJ_MAXINDEX + 1] = HPI_RESPONSE_SIZE_BY_OBJECT;
  31 /* Flag to enable alternate message type for SSX2 bypass. */
  32 static u16 gwSSX2_bypass;
  33
  34 /** \internal
  35   * initialize the HPI message structure
  36   */
  37 static 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_REQUEST;
  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   */
  60 void 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
  76 void 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
  86 static 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_REQUEST;
  93                 phm->object = object;
  94                 phm->function = function;
  95                 phm->version = 1;
  96                 /* Expect adapter index to be set by caller */
  97         }
  98 }
  99
 100 void 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
 110 void 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 }