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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Portalplayer specific code for Wolfson audio codecs
*
* Based on code from the ipodlinux project - http://ipodlinux.org/
* Adapted for Rockbox in December 2005
*
* Original file: linux/arch/armnommu/mach-ipod/audio.c
*
* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
*
* 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 "system.h"
#include "audiohw.h"
#include "i2c-pp.h"
#include "i2s.h"
#include "wmcodec.h"
#if defined(IRIVER_H10) || defined(IRIVER_H10_5GB) || \
defined(MROBE_100) || defined(PHILIPS_HDD1630) || defined(PHILIPS_HDD6330) || \
defined(PBELL_VIBE500)
/* The H10's audio codec uses an I2C address of 0x1b */
#define I2C_AUDIO_ADDRESS 0x1b
#else
/* The iPod's audio codecs use an I2C address of 0x1a */
#define I2C_AUDIO_ADDRESS 0x1a
#endif
/*
* Initialise the PP I2C and I2S.
*/
void audiohw_init(void)
{
#ifdef CPU_PP502x
/* normal outputs for CDI and I2S pin groups */
DEV_INIT2 &= ~0x300;
/*mini2?*/
DEV_INIT1 &=~0x3000000;
/*mini2?*/
/* I2S device reset */
DEV_RS |= DEV_I2S;
DEV_RS &=~DEV_I2S;
/* I2S device enable */
DEV_EN |= DEV_I2S;
/* enable external dev clock clocks */
DEV_EN |= DEV_EXTCLOCKS;
/* external dev clock to 24MHz */
outl(inl(0x70000018) & ~0xc, 0x70000018);
#else
/* device reset */
outl(inl(0xcf005030) | 0x80, 0xcf005030);
outl(inl(0xcf005030) & ~0x80, 0xcf005030);
/* device enable */
outl(inl(0xcf005000) | 0x80, 0xcf005000);
/* GPIO D06 enable for output */
outl(inl(0xcf00000c) | 0x40, 0xcf00000c);
outl(inl(0xcf00001c) & ~0x40, 0xcf00001c);
#ifdef IPOD_1G2G
/* bits 11,10 == 10 */
outl(inl(0xcf004040) & ~0x400, 0xcf004040);
outl(inl(0xcf004040) | 0x800, 0xcf004040);
#else /* IPOD_3G */
/* bits 11,10 == 01 */
outl(inl(0xcf004040) | 0x400, 0xcf004040);
outl(inl(0xcf004040) & ~0x800, 0xcf004040);
outl(inl(0xcf004048) & ~0x1, 0xcf004048);
outl(inl(0xcf000004) & ~0xf, 0xcf000004);
outl(inl(0xcf004044) & ~0xf, 0xcf004044);
/* C03 = 0 */
outl(inl(0xcf000008) | 0x8, 0xcf000008);
outl(inl(0xcf000018) | 0x8, 0xcf000018);
outl(inl(0xcf000028) & ~0x8, 0xcf000028);
#endif /* IPOD_1G2G/3G */
#endif
/* reset the I2S controller into known state */
i2s_reset();
audiohw_preinit();
}
void wmcodec_write(int reg, int data)
{
pp_i2c_send(I2C_AUDIO_ADDRESS, (reg<<1) | ((data&0x100)>>8),data&0xff);
}
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