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//
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//
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//    Copyright 2010 TheSeven
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//
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//
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//    This file is part of emCORE.
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//
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//    emCORE is free software: you can redistribute it and/or
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//    modify it under the terms of the GNU General Public License as
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//    published by the Free Software Foundation, either version 2 of the
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//    License, or (at your option) any later version.
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//
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//    emCORE is distributed in the hope that it will be useful,
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//    but WITHOUT ANY WARRANTY; without even the implied warranty of
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//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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//    See the GNU General Public License for more details.
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//
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//    You should have received a copy of the GNU General Public License along
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//    with emCORE.  If not, see <http://www.gnu.org/licenses/>.
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//
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//
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#include "global.h"
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#include "i2c.h"
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#include "pmu.h"
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#include "thread.h"
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static struct mutex pmumutex;
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void pmu_read_multiple(int address, int count, unsigned char* buffer)
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{
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    i2c_recv(0, 0xe6, address, buffer, count);
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}
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void pmu_write_multiple(int address, int count, unsigned char* buffer)
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{
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    i2c_send(0, 0xe6, address, buffer, count);
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}
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unsigned char pmu_read(int address)
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{
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    return i2c_recvbyte(0, 0xe6, address);
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}
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void pmu_write(int address, unsigned char val)
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{
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    i2c_sendbyte(0, 0xe6, address, val);
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}
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void pmu_init()
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{
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    mutex_init(&pmumutex);
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//    pmu_write(0x1e, 0x0f);  // Vcore @ 1.000V
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//    pmu_write(0x22, 0x22);  // Vmem @ 1.475V
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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(&pmumutex, TIMEOUT_BLOCK);
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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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        sleep(1000);
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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(&pmumutex);
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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 -1;
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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_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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}