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