93 lines
2 KiB
C
93 lines
2 KiB
C
// Emacs style mode select -*- C++ -*-
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//-----------------------------------------------------------------------------
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//
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// Copyright(C) 2009 Simon Howard
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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// 02111-1307, USA.
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//
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// DESCRIPTION:
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// OPL interface.
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//
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//-----------------------------------------------------------------------------
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#include "config.h"
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#include <stdlib.h>
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#include "opl.h"
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#include "opl_internal.h"
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#ifdef HAVE_IOPERM
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extern opl_driver_t opl_linux_driver;
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#endif
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static opl_driver_t *drivers[] =
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{
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#ifdef HAVE_IOPERM
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&opl_linux_driver,
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#endif
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NULL
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};
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static opl_driver_t *driver = NULL;
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int OPL_Init(unsigned int port_base)
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{
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int i;
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// Try drivers until we find a working one:
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for (i=0; drivers[i] != NULL; ++i)
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{
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if (drivers[i]->init_func(port_base))
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{
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driver = drivers[i];
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return 1;
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}
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}
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return 0;
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}
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void OPL_Shutdown(void)
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{
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if (driver != NULL)
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{
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driver->shutdown_func();
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driver = NULL;
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}
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}
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void OPL_WritePort(opl_port_t port, unsigned int value)
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{
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if (driver != NULL)
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{
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driver->write_port_func(port, value);
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}
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}
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unsigned int OPL_ReadPort(opl_port_t port)
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{
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if (driver != NULL)
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{
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return driver->read_port_func(port);
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}
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else
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{
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return 0;
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}
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}
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