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Reworked iPod Nano 2G PMU code, added RTC and battery ADC.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22967 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sparmann 2009-10-05 20:21:33 +00:00
parent 6b8a78f793
commit be25469b9b
8 changed files with 213 additions and 27 deletions
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90
firmware/target/arm/s5l8700/ipodnano2g/pmu-nano2g.c Normal file
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@ -0,0 +1,90 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright © 2008 Rafaël Carré
*
* 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 "config.h"
#include "kernel.h"
#include "i2c-s5l8700.h"
static struct mutex pmu_adc_mutex;
int pmu_initialized;
unsigned char pmu_read(int address)
{
unsigned char tmp;
i2c_read(0xe6, address, 1, &tmp);
return tmp;
}
void pmu_write(int address, unsigned char val)
{
i2c_write(0xe6, address, 1, &val);
}
void pmu_read_multiple(int address, int count, unsigned char* buffer)
{
i2c_read(0xe6, address, count, buffer);
}
void pmu_write_multiple(int address, int count, unsigned char* buffer)
{
i2c_write(0xe6, address, count, buffer);
}
void pmu_init(void)
{
if (pmu_initialized) return;
mutex_init(&pmu_adc_mutex);
pmu_initialized = 1;
}
int pmu_read_battery_voltage(void)
{
int data = 0;
if (!pmu_initialized) pmu_init();
mutex_lock(&pmu_adc_mutex);
pmu_write(0x54, 0x05);
while ((data & 0x80) == 0)
{
yield();
data = pmu_read(0x57);
}
int millivolts = ((pmu_read(0x55) << 2) | (data & 3)) * 6;
mutex_unlock(&pmu_adc_mutex);
return millivolts;
}
int pmu_read_battery_current(void)
{
int data = 0;
if (!pmu_initialized) pmu_init();
mutex_lock(&pmu_adc_mutex);
pmu_write(0x54, 0x25);
while ((data & 0x80) == 0)
{
yield();
data = pmu_read(0x57);
}
int milliamps = (pmu_read(0x55) << 2) | (data & 3);
mutex_unlock(&pmu_adc_mutex);
return milliamps;
}