From 84a05be9dbc9d1b181670f8fd7e036bbe691d856 Mon Sep 17 00:00:00 2001 From: Simon Howard Date: Tue, 10 Mar 2009 21:55:55 +0000 Subject: Add OPL lib plumbing and Linux native driver. Subversion-branch: /branches/opl-branch Subversion-revision: 1458 --- opl/Makefile.am | 4 ++- opl/opl.c | 56 +++++++++++++++++++++++++++---- opl/opl_internal.h | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ opl/opl_linux.c | 79 ++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 228 insertions(+), 7 deletions(-) create mode 100644 opl/opl_internal.h create mode 100644 opl/opl_linux.c (limited to 'opl') diff --git a/opl/Makefile.am b/opl/Makefile.am index 65f8b2de..e1dbe42c 100644 --- a/opl/Makefile.am +++ b/opl/Makefile.am @@ -4,6 +4,8 @@ AM_CFLAGS=@SDLMIXER_CFLAGS@ noinst_LIBRARIES=libopl.a libopl_a_SOURCES = \ + opl_internal.h \ opl.c opl.h \ - fmopl.c + opl_linux.c \ + fmopl.c fmopl.h diff --git a/opl/opl.c b/opl/opl.c index d3dfc23b..28609223 100644 --- a/opl/opl.c +++ b/opl/opl.c @@ -23,27 +23,71 @@ // //----------------------------------------------------------------------------- +#include "config.h" + +#include + #include "opl.h" +#include "opl_internal.h" + +#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) { - // TODO - return 1; + 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) { - // TODO + if (driver != NULL) + { + driver->shutdown_func(); + driver = NULL; + } } void OPL_WritePort(opl_port_t port, unsigned int value) { - // TODO + if (driver != NULL) + { + driver->write_port_func(port, value); + } } unsigned int OPL_ReadPort(opl_port_t port) { - // TODO - return 0; + if (driver != NULL) + { + return driver->read_port_func(port); + } + else + { + return 0; + } } diff --git a/opl/opl_internal.h b/opl/opl_internal.h new file mode 100644 index 00000000..964f55cc --- /dev/null +++ b/opl/opl_internal.h @@ -0,0 +1,96 @@ +// 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 internal interface. +// +//----------------------------------------------------------------------------- + + +#ifndef OPL_INTERNAL_H +#define OPL_INTERNAL_H + +#include "opl.h" + +typedef int (*opl_init_func)(unsigned int port_base); +typedef void (*opl_shutdown_func)(void); +typedef unsigned int (*opl_read_port_func)(opl_port_t port); +typedef void (*opl_write_port_func)(opl_port_t port, unsigned int value); + +typedef struct +{ + char *name; + + opl_init_func init_func; + opl_shutdown_func shutdown_func; + opl_read_port_func read_port_func; + opl_write_port_func write_port_func; +} opl_driver_t; + +#endif /* #ifndef OPL_INTERNAL_H */ + +// 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 internal interface. +// +//----------------------------------------------------------------------------- + + +#ifndef OPL_INTERNAL_H +#define OPL_INTERNAL_H + +#include "opl.h" + +typedef int (*opl_init_func)(unsigned int port_base); +typedef void (*opl_shutdown_func)(void); +typedef unsigned int (*opl_read_port_func)(opl_port_t port); +typedef void (*opl_write_port_func)(opl_port_t port, unsigned int value); + +typedef struct +{ + char *name; + + opl_init_func init_func; + opl_shutdown_func shutdown_func; + opl_read_port_func read_port_func; + opl_write_port_func write_port_func; +} opl_driver_t; + +#endif /* #ifndef OPL_INTERNAL_H */ + diff --git a/opl/opl_linux.c b/opl/opl_linux.c new file mode 100644 index 00000000..438b091a --- /dev/null +++ b/opl/opl_linux.c @@ -0,0 +1,79 @@ +// 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 Linux interface. +// +//----------------------------------------------------------------------------- + +#include "config.h" + +#ifdef HAVE_IOPERM + +#include +#include + +#include "opl.h" +#include "opl_internal.h" + +static unsigned int opl_port_base; + +static void OPL_Linux_Init(unsigned int port_base) +{ + // Try to get permissions: + + if (ioperm(port_base, 2, 1) < 0) + { + return 0; + } + + opl_port_base = port_base; + + return 1; +} + +static void OPL_Linux_Shutdown(void) +{ + // Release permissions + + ioperm(opl_port_base, 2, 0); +} + +static unsigned int OPL_Linux_PortRead(opl_port_t port) +{ + return inb(opl_port_base + port); +} + +static void OPL_Linux_PortWrite(opl_port_t port, unsigned int value) +{ + outb(opl_port_base + port, value); +} + +opl_driver_t opl_linux_driver = +{ + "Linux", + OPL_Linux_Init, + OPL_Linux_Shutdown, + OPL_Linux_PortRead, + OPL_Linux_PortWrite +}; + +#endif /* #ifdef HAVE_IOPERM */ + -- cgit v1.2.3