e69d567d9e
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19400 a1c6a512-1295-4272-9138-f99709370657
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/***************************************************************************
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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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* Portalplayer specific code for I2S
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*
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* Based on code from the ipodlinux project - http://ipodlinux.org/
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* Adapted for Rockbox in December 2005
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*
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* Original file: linux/arch/armnommu/mach-ipod/audio.c
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*
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* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
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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 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 "system.h"
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#include "cpu.h"
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#include "i2s.h"
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#if CONFIG_CPU == PP5002
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void i2s_reset(void)
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{
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/* I2S device reset */
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DEV_RS |= DEV_I2S;
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DEV_RS &= ~DEV_I2S;
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/* I2S controller enable */
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IISCONFIG |= IIS_ENABLE;
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/* reset DAC and ADC fifo */
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IISFIFO_CFG |= IIS_RXCLR | IIS_TXCLR;
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}
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#else /* PP502X */
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/*
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* Reset the I2S BIT.FORMAT I2S, 16bit, FIFO.FORMAT 32bit
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*/
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void i2s_reset(void)
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{
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/* I2S soft reset */
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IISCONFIG |= IIS_RESET;
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IISCONFIG &= ~IIS_RESET;
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/* BIT.FORMAT */
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IISCONFIG = ((IISCONFIG & ~IIS_FORMAT_MASK) | IIS_FORMAT_IIS);
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/* BIT.SIZE */
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IISCONFIG = ((IISCONFIG & ~IIS_SIZE_MASK) | IIS_SIZE_16BIT);
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/* FIFO.FORMAT */
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/* If BIT.SIZE < FIFO.FORMAT low bits will be 0 */
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#ifdef HAVE_AS3514
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/* AS3514 can only operate as I2S Slave */
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IISCONFIG |= IIS_MASTER;
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/* Set I2S to 44.1kHz */
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IISCLK = (IISCLK & ~0x1ff) | 33;
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IISDIV = 7;
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#endif /* HAVE_AS3514 */
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IISCONFIG = ((IISCONFIG & ~IIS_FIFO_FORMAT_MASK) | IIS_FIFO_FORMAT_LE16_2);
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/* RX_ATN_LVL = when 12 slots full */
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/* TX_ATN_LVL = when 12 slots empty */
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IISFIFO_CFG |= IIS_RX_FULL_LVL_12 | IIS_TX_EMPTY_LVL_12;
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/* Rx.CLR = 1, TX.CLR = 1 */
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IISFIFO_CFG |= IIS_RXCLR | IIS_TXCLR;
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}
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#endif /* CONFIG_CPU == */
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