144 lines
3.3 KiB
C
144 lines
3.3 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: pmu-nano2g.c 27752 2010-08-08 10:49:32Z bertrik $
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*
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* Copyright © 2008 Rafaël Carré
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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 "config.h"
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#include "kernel.h"
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#include "i2c-s5l8702.h"
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#include "pmu-target.h"
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static struct mutex pmu_adc_mutex;
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int pmu_read_multiple(int address, int count, unsigned char* buffer)
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{
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return i2c_read(0, 0xe6, address, count, buffer);
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}
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int pmu_write_multiple(int address, int count, unsigned char* buffer)
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{
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return i2c_write(0, 0xe6, address, count, buffer);
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}
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unsigned char pmu_read(int address)
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{
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unsigned char tmp;
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pmu_read_multiple(address, 1, &tmp);
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return tmp;
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}
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int pmu_write(int address, unsigned char val)
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{
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return pmu_write_multiple(address, 1, &val);
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}
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void pmu_init(void)
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{
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mutex_init(&pmu_adc_mutex);
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}
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int pmu_read_adc(unsigned int adc)
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{
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int data = 0;
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mutex_lock(&pmu_adc_mutex);
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pmu_write(0x54, 5 | (adc << 4));
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while ((data & 0x80) == 0)
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{
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yield();
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data = pmu_read(0x57);
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}
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int value = (pmu_read(0x55) << 2) | (data & 3);
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mutex_unlock(&pmu_adc_mutex);
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return value;
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}
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/* millivolts */
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int pmu_read_battery_voltage(void)
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{
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return pmu_read_adc(0) * 6;
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}
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/* milliamps */
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int pmu_read_battery_current(void)
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{
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// return pmu_read_adc(2);
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return 0;
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}
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void pmu_ldo_on_in_standby(unsigned int ldo, int onoff)
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{
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if (ldo < 4)
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{
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unsigned char newval = pmu_read(0x3B) & ~(1 << (2 * ldo));
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if (onoff) newval |= 1 << (2 * ldo);
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pmu_write(0x3B, newval);
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}
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else if (ldo < 8)
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{
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unsigned char newval = pmu_read(0x3C) & ~(1 << (2 * (ldo - 4)));
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if (onoff) newval |= 1 << (2 * (ldo - 4));
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pmu_write(0x3C, newval);
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}
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}
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void pmu_ldo_set_voltage(unsigned int ldo, unsigned char voltage)
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{
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if (ldo > 6) return;
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pmu_write(0x2d + (ldo << 1), voltage);
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}
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void pmu_hdd_power(bool on)
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{
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pmu_write(0x1b, on ? 1 : 0);
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}
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void pmu_ldo_power_on(unsigned int ldo)
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{
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if (ldo > 6) return;
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pmu_write(0x2e + (ldo << 1), 1);
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}
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void pmu_ldo_power_off(unsigned int ldo)
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{
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if (ldo > 6) return;
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pmu_write(0x2e + (ldo << 1), 0);
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}
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void pmu_set_wake_condition(unsigned char condition)
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{
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pmu_write(0xd, condition);
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}
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void pmu_enter_standby(void)
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{
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pmu_write(0xc, 1);
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}
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void pmu_read_rtc(unsigned char* buffer)
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{
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pmu_read_multiple(0x59, 7, buffer);
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}
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void pmu_write_rtc(unsigned char* buffer)
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{
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pmu_write_multiple(0x59, 7, buffer);
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}
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