719f82d398
Added the support of AudioScience ASI boards. The driver has been tested for years on alsa-driver external tree, now finally got merged to the kernel. Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
/******************************************************************************
|
|
|
|
AudioScience HPI driver
|
|
Copyright (C) 1997-2010 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"
|
|
|
|
/* 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
|
|
* Used by ASIO driver to disable SSX2 for a single process
|
|
* \param phSubSys Pointer to HPI subsystem handle.
|
|
* \param wBypass New bypass setting 0 = off, nonzero = on
|
|
* \return Previous bypass setting.
|
|
*/
|
|
u16 hpi_subsys_ssx2_bypass(const struct hpi_hsubsys *ph_subsys, u16 bypass)
|
|
{
|
|
u16 old_value = gwSSX2_bypass;
|
|
|
|
gwSSX2_bypass = bypass;
|
|
|
|
return old_value;
|
|
}
|
|
|
|
/** \internal
|
|
* initialize the HPI message structure
|
|
*/
|
|
static void hpi_init_message(struct hpi_message *phm, u16 object,
|
|
u16 function)
|
|
{
|
|
memset(phm, 0, sizeof(*phm));
|
|
if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
|
|
phm->size = msg_size[object];
|
|
else
|
|
phm->size = sizeof(*phm);
|
|
|
|
if (gwSSX2_bypass)
|
|
phm->type = HPI_TYPE_SSX2BYPASS_MESSAGE;
|
|
else
|
|
phm->type = HPI_TYPE_MESSAGE;
|
|
phm->object = object;
|
|
phm->function = function;
|
|
phm->version = 0;
|
|
/* Expect 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)
|
|
{
|
|
memset(phr, 0, sizeof(*phr));
|
|
phr->type = HPI_TYPE_RESPONSE;
|
|
if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
|
|
phr->size = res_size[object];
|
|
else
|
|
phr->size = sizeof(*phr);
|
|
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, sizeof(*phm));
|
|
if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
|
|
phm->size = size;
|
|
phm->type = HPI_TYPE_MESSAGE;
|
|
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)
|
|
{
|
|
memset(phr, 0, sizeof(*phr));
|
|
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);
|
|
}
|