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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 2009 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// 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.
//
// DESCRIPTION:
// OPL interface.
//
//-----------------------------------------------------------------------------
#include "config.h"
#include <stdlib.h>
#include "opl.h"
#include "opl_internal.h"
#define OPL_DEBUG_TRACE
#ifdef HAVE_IOPERM
extern opl_driver_t opl_linux_driver;
#endif
static opl_driver_t *drivers[] =
{
#ifdef HAVE_IOPERM
&opl_linux_driver,
#endif
NULL
};
static opl_driver_t *driver = NULL;
int OPL_Init(unsigned int port_base)
{
int i;
// Try drivers until we find a working one:
for (i=0; drivers[i] != NULL; ++i)
{
if (drivers[i]->init_func(port_base))
{
driver = drivers[i];
return 1;
}
}
return 0;
}
void OPL_Shutdown(void)
{
if (driver != NULL)
{
driver->shutdown_func();
driver = NULL;
}
}
void OPL_WritePort(opl_port_t port, unsigned int value)
{
if (driver != NULL)
{
#ifdef OPL_DEBUG_TRACE
printf("OPL_write: %i, %x\n", port, value);
#endif
driver->write_port_func(port, value);
}
}
unsigned int OPL_ReadPort(opl_port_t port)
{
if (driver != NULL)
{
unsigned int result;
result = driver->read_port_func(port);
#ifdef OPL_DEBUG_TRACE
printf("OPL_read: %i -> %x\n", port, result);
#endif
return result;
}
else
{
return 0;
}
}
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