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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Maurus Cuelenaere
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "audio.h"
#include "registers.h"
/* based on http://archopen.svn.sourceforge.net/viewvc/archopen/ArchOpen/trunk/libdsp/aic23.c?revision=213&view=markup */
void audiohw_init(void)
{
/* port config */
#if 0
SPCR10 = 0; /* DLB = 0 ** RJUST = 0 ** CLKSTP = 0 ** DXENA = 0 ** ABIS = 0 ** RINTM = 0 ** RSYNCER = 0 ** RFULL = 0 ** RRDY = 0 ** RRST = 0 */
SPCR20 = (1 << 9); /* FREE = 1 ** SOFT = 0 ** FRST = 0 ** GRST = 0 ** XINTM = 0 ** XSYNCER = 0 ** XEMPTY = 0 ** XRDY = 0 ** XRST = 0 */
RCR10 = (1 << 8) | (2 << 5); /* RFRLEN1 = 1 ** RWDLEN1 = 2 */
RCR20 = 0; /* RPHASE = 0 ** RFRLEN2 = 0 ** RWDLEN2 = 0 ** RCOMPAND = 0 ** RFIG = 0 ** RDATDLY = 0 */
XCR10 = (1 << 8) | (2 << 5); /* XFRLEN1 = 1 ** XWDLEN1 = 2 */
XCR20 = 0; /* XPHASE = 0 ** XFRLEN2 = 0 ** XWDLEN2 = 0 ** XCOMPAND = 0 ** XFIG = 0 ** XDATDLY = 0 */
SRGR10 = 0; /* FWID = 0 ** CLKGDV = 0 */
SRGR20 = 0; /* FREE = 0 ** CLKSP = 0 ** CLKSM = 0 ** FSGM = 0 ** FPER = 0 */
PCR0 = (1 << 1) | 1; /* IDLEEN = 0 ** XIOEN = 0 ** RIOEN = 0 ** FSXM = 0 ** FSRM = 0 ** SCLKME = 0 ** CLKSSTAT = 0 ** DXSTAT = 0 ** DRSTAT = 0 ** CLKXM = 0 ** CLKRM = 0 ** FSXP = 0 ** FSRP = 0 ** CLKXP = 1 ** CLKRP = 1 */
#else
SPCR10 = 0;
SPCR20 = 0x0200; /* SPCR : free running mode */
RCR10 = 0x00A0;
RCR20 = 0x00A1; /* RCR : 32 bit receive data length */
XCR10 = 0x00A0;
XCR20 = 0x00A0; /* XCR : 32 bit transmit data length */
SRGR10 = 0;
SRGR20 = 0x3000; /* SRGR 1 & 2 */
PCR0 = 0x000E - 8; /* PCR : FSX, FSR active low, external FS/CLK source */
#endif
}
void audiohw_postinit(void)
{
/* Trigger first XEVT0 */
SPCR20 |= 1;
}
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