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Linux/sound/pci/asihpi/hpimsginit.c

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  1 /******************************************************************************
  2 
  3     AudioScience HPI driver
  4     Copyright (C) 1997-2014  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         u16 size;
 41 
 42         if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
 43                 size = msg_size[object];
 44         else
 45                 size = sizeof(*phm);
 46 
 47         memset(phm, 0, size);
 48         phm->size = size;
 49 
 50         if (gwSSX2_bypass)
 51                 phm->type = HPI_TYPE_SSX2BYPASS_MESSAGE;
 52         else
 53                 phm->type = HPI_TYPE_REQUEST;
 54         phm->object = object;
 55         phm->function = function;
 56         phm->version = 0;
 57         phm->adapter_index = HPI_ADAPTER_INDEX_INVALID;
 58         /* Expect actual adapter index to be set by caller */
 59 }
 60 
 61 /** \internal
 62   * initialize the HPI response structure
 63   */
 64 void hpi_init_response(struct hpi_response *phr, u16 object, u16 function,
 65         u16 error)
 66 {
 67         u16 size;
 68 
 69         if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
 70                 size = res_size[object];
 71         else
 72                 size = sizeof(*phr);
 73 
 74         memset(phr, 0, sizeof(*phr));
 75         phr->size = size;
 76         phr->type = HPI_TYPE_RESPONSE;
 77         phr->object = object;
 78         phr->function = function;
 79         phr->error = error;
 80         phr->specific_error = 0;
 81         phr->version = 0;
 82 }
 83 
 84 void hpi_init_message_response(struct hpi_message *phm,
 85         struct hpi_response *phr, u16 object, u16 function)
 86 {
 87         hpi_init_message(phm, object, function);
 88         /* default error return if the response is
 89            not filled in by the callee */
 90         hpi_init_response(phr, object, function,
 91                 HPI_ERROR_PROCESSING_MESSAGE);
 92 }
 93 
 94 static void hpi_init_messageV1(struct hpi_message_header *phm, u16 size,
 95         u16 object, u16 function)
 96 {
 97         memset(phm, 0, size);
 98         if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
 99                 phm->size = size;
100                 phm->type = HPI_TYPE_REQUEST;
101                 phm->object = object;
102                 phm->function = function;
103                 phm->version = 1;
104                 /* Expect adapter index to be set by caller */
105         }
106 }
107 
108 void hpi_init_responseV1(struct hpi_response_header *phr, u16 size,
109         u16 object, u16 function)
110 {
111         (void)object;
112         (void)function;
113         memset(phr, 0, size);
114         phr->size = size;
115         phr->version = 1;
116         phr->type = HPI_TYPE_RESPONSE;
117         phr->error = HPI_ERROR_PROCESSING_MESSAGE;
118 }
119 
120 void hpi_init_message_responseV1(struct hpi_message_header *phm, u16 msg_size,
121         struct hpi_response_header *phr, u16 res_size, u16 object,
122         u16 function)
123 {
124         hpi_init_messageV1(phm, msg_size, object, function);
125         hpi_init_responseV1(phr, res_size, object, function);
126 }
127 

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