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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Driver for pcf50605 PMU and RTC
*
* Based on code from the ipodlinux project - http://ipodlinux.org/
* Adapted for Rockbox in December 2005
*
* Original file: linux/arch/armnommu/mach-ipod/pcf50605.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 "config.h"
#if CONFIG_I2C == I2C_PP5020 || CONFIG_I2C == I2C_PP5002
#include "i2c-pp.h"
#endif
#include "rtc.h"
#include "pcf5060x.h"
#include "pcf50605.h"
unsigned char pcf50605_wakeup_flags = 0;
int pcf50605_read(int address)
{
return i2c_readbyte(0x8,address);
}
int pcf50605_read_multiple(int address, unsigned char* buf, int count)
{
int read = i2c_readbytes(0x08, address, count, buf);
return read - count;
}
int pcf50605_write(int address, unsigned char val)
{
pp_i2c_send(0x8, address, val);
return 0;
}
int pcf50605_write_multiple(int address, const unsigned char* buf, int count)
{
int i;
i2c_lock();
for (i = 0; i < count; i++)
pp_i2c_send(0x8, address + i, buf[i]);
i2c_unlock();
return 0;
}
/* The following command puts the iPod into a deep sleep. Warning
from the good people of ipodlinux - never issue this command
without setting CHGWAK or EXTONWAK if you ever want to be able to
power on your iPod again. */
void pcf50605_standby_mode(void)
{
pcf50605_write(PCF5060X_OOCC1,
GOSTDBY | CHGWAK | EXTONWAK | pcf50605_wakeup_flags);
}
void pcf50605_init(void)
{
#if (defined (IPOD_VIDEO) || defined (IPOD_NANO))
/* I/O and GPO voltage supply. ECO not allowed regarding data sheet. Defaults:
* iPod Video = 0xf8 = 3.3V ON
* iPod nano = 0xf5 = 3.0V ON */
pcf50605_write(PCF5060X_IOREGC, 0xf5); /* 3.0V ON */
/* Core voltage supply. ECO not stable, assumed due to less precision of
* voltage in ECO mode. DCDC2 is not relevant as this may be used for
* voltage scaling. Default is 1.2V ON for PP5022/PP5024 */
pcf50605_write(PCF5060X_DCDC1, 0xec); /* 1.2V ON */
pcf50605_write(PCF5060X_DCDC2, 0x0c); /* OFF */
/* Unknown. Defaults:
* iPod Video = 0xe3 = 1.8V ON
* iPod nano = 0xe3 = 1.8V ON */
pcf50605_write(PCF5060X_DCUDC1, 0xe3); /* 1.8V ON */
/* Codec voltage supply. ECO not allowed as max. current of 5mA is not
* sufficient. Defaults:
* iPod Video = 0xf5 = 3.0V ON
* iPod nano = 0xef = 2.4V ON */
pcf50605_write(PCF5060X_D1REGC1, 0xf0); /* 2.5V ON */
/* PCF5060X_D2REGC1 is set in accordance to the accessory power setting */
#if defined (IPOD_VIDEO)
/* LCD voltage supply. Defaults:
* iPod Video = 0xf5 = 3.0V ON */
pcf50605_write(PCF5060X_D3REGC1, 0xf1); /* 2.6V ON */
#elif defined (IPOD_NANO)
/* D3REGC has effect on LCD and ATA, leave it unchanged due to possible ATA
* failures. Defaults:
* iPod nano = 0xf5 = 3.0V ON */
pcf50605_write(PCF5060X_D3REGC1, 0xf5); /* 3.0V ON */
#endif
/* PCF5060X_LPREGC1 is leaved untouched as the setting varies over the
* different iPod platforms. Defaults:
* iPod Video = 0x1f = 0ff
* iPod nano = 0xf6 = 3.1V ON */
#else
/* keep initialization from svn for other iPods */
pcf50605_write(PCF5060X_D1REGC1, 0xf5); /* 3.0V ON */
pcf50605_write(PCF5060X_D3REGC1, 0xf5); /* 3.0V ON */
#endif
}
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