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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2011 by Amaury Pouly
*
* 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 "system.h"
#include "power.h"
#include "string.h"
#include "system-target.h"
struct current_step_bit_t
{
unsigned current;
uint32_t bit;
};
/* in decreasing order */
static struct current_step_bit_t g_charger_current_bits[] =
{
{ 400, HW_POWER_CHARGE__BATTCHRG_I__400mA },
{ 200, HW_POWER_CHARGE__BATTCHRG_I__200mA },
{ 100, HW_POWER_CHARGE__BATTCHRG_I__100mA },
{ 50, HW_POWER_CHARGE__BATTCHRG_I__50mA },
{ 20, HW_POWER_CHARGE__BATTCHRG_I__20mA },
{ 10, HW_POWER_CHARGE__BATTCHRG_I__10mA }
};
/* in decreasing order */
static struct current_step_bit_t g_charger_stop_current_bits[] =
{
{ 100, HW_POWER_CHARGE__STOP_ILIMIT__100mA },
{ 50, HW_POWER_CHARGE__STOP_ILIMIT__50mA },
{ 20, HW_POWER_CHARGE__STOP_ILIMIT__20mA },
{ 10, HW_POWER_CHARGE__STOP_ILIMIT__10mA }
};
/* in decreasing order */
static struct current_step_bit_t g_4p2_charge_limit_bits[] =
{
{ 400, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__400mA },
{ 200, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__200mA },
{ 100, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__100mA },
{ 50, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__50mA },
{ 20, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__20mA },
{ 10, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__10mA }
};
void INT_VDD5V(void)
{
if(HW_POWER_CTRL & HW_POWER_CTRL__VBUSVALID_IRQ)
{
if(HW_POWER_STS & HW_POWER_STS__VBUSVALID)
usb_insert_int();
else
usb_remove_int();
/* reverse polarity */
__REG_TOG(HW_POWER_CTRL) = HW_POWER_CTRL__POLARITY_VBUSVALID;
/* enable int */
__REG_CLR(HW_POWER_CTRL) = HW_POWER_CTRL__VBUSVALID_IRQ;
}
}
void power_init(void)
{
/* setup vbusvalid parameters: set threshold to 4v and power up comparators */
__REG_CLR(HW_POWER_5VCTRL) = HW_POWER_5VCTRL__VBUSVALID_TRSH_BM;
__REG_SET(HW_POWER_5VCTRL) = HW_POWER_5VCTRL__VBUSVALID_TRSH_4V |
HW_POWER_5VCTRL__PWRUP_VBUS_CMPS;
/* enable vbusvalid detection method for the dcdc (improves efficiency) */
__REG_SET(HW_POWER_5VCTRL) = HW_POWER_5VCTRL__VBUSVALID_5VDETECT;
/* clear vbusvalid irq and set correct polarity */
__REG_CLR(HW_POWER_CTRL) = HW_POWER_CTRL__VBUSVALID_IRQ;
if(HW_POWER_STS & HW_POWER_STS__VBUSVALID)
__REG_CLR(HW_POWER_CTRL) = HW_POWER_CTRL__POLARITY_VBUSVALID;
else
__REG_SET(HW_POWER_CTRL) = HW_POWER_CTRL__POLARITY_VBUSVALID;
__REG_SET(HW_POWER_CTRL) = HW_POWER_CTRL__ENIRQ_VBUS_VALID;
imx233_enable_interrupt(INT_SRC_VDD5V, true);
/* setup linear regulator offsets to 25 mV below to prevent contention between
* linear regulators and DCDC */
__FIELD_SET(HW_POWER_VDDDCTRL, LINREG_OFFSET, 2);
__FIELD_SET(HW_POWER_VDDACTRL, LINREG_OFFSET, 2);
__FIELD_SET(HW_POWER_VDDIOCTRL, LINREG_OFFSET, 2);
}
void power_off(void)
{
/* wait a bit, useful for the user to stop touching anything */
sleep(HZ / 2);
/* power down */
HW_POWER_RESET = HW_POWER_RESET__UNLOCK | HW_POWER_RESET__PWD;
while(1);
}
unsigned int power_input_status(void)
{
return (usb_detect == USB_INSERTED)
? POWER_INPUT_MAIN_CHARGER : POWER_INPUT_NONE;
}
bool charging_state(void)
{
return HW_POWER_STS & HW_POWER_STS__CHRGSTS;
}
void imx233_power_set_charge_current(unsigned current)
{
__REG_CLR(HW_POWER_CHARGE) = HW_POWER_CHARGE__BATTCHRG_I_BM;
/* find closest current LOWER THAN OR EQUAL TO the expected current */
for(unsigned i = 0; i < ARRAYLEN(g_charger_current_bits); i++)
if(current >= g_charger_current_bits[i].current)
{
current -= g_charger_current_bits[i].current;
__REG_SET(HW_POWER_CHARGE) = g_charger_current_bits[i].bit;
}
}
void imx233_power_set_stop_current(unsigned current)
{
__REG_CLR(HW_POWER_CHARGE) = HW_POWER_CHARGE__STOP_ILIMIT_BM;
/* find closest current GREATHER THAN OR EQUAL TO the expected current */
unsigned sum = 0;
for(unsigned i = 0; i < ARRAYLEN(g_charger_stop_current_bits); i++)
sum += g_charger_stop_current_bits[i].current;
for(unsigned i = 0; i < ARRAYLEN(g_charger_stop_current_bits); i++)
{
sum -= g_charger_stop_current_bits[i].current;
if(current > sum)
{
current -= g_charger_stop_current_bits[i].current;
__REG_SET(HW_POWER_CHARGE) = g_charger_stop_current_bits[i].bit;
}
}
}
struct imx233_power_info_t imx233_power_get_info(unsigned flags)
{
static int dcdc_freqsel[8] = {
[HW_POWER_MISC__FREQSEL__RES] = 0,
[HW_POWER_MISC__FREQSEL__20MHz] = 20000,
[HW_POWER_MISC__FREQSEL__24MHz] = 24000,
[HW_POWER_MISC__FREQSEL__19p2MHz] = 19200,
[HW_POWER_MISC__FREQSEL__14p4MHz] = 14200,
[HW_POWER_MISC__FREQSEL__18MHz] = 18000,
[HW_POWER_MISC__FREQSEL__21p6MHz] = 21600,
[HW_POWER_MISC__FREQSEL__17p28MHz] = 17280,
};
struct imx233_power_info_t s;
memset(&s, 0, sizeof(s));
if(flags & POWER_INFO_VDDD)
{
s.vddd = HW_POWER_VDDDCTRL__TRG_MIN + HW_POWER_VDDDCTRL__TRG_STEP * __XTRACT(HW_POWER_VDDDCTRL, TRG);
s.vddd_linreg = HW_POWER_VDDDCTRL & HW_POWER_VDDDCTRL__ENABLE_LINREG;
s.vddd_linreg_offset = __XTRACT(HW_POWER_VDDDCTRL, LINREG_OFFSET) == 0 ? 0 :
__XTRACT(HW_POWER_VDDDCTRL, LINREG_OFFSET) == 1 ? 25 : -25;
}
if(flags & POWER_INFO_VDDA)
{
s.vdda = HW_POWER_VDDACTRL__TRG_MIN + HW_POWER_VDDACTRL__TRG_STEP * __XTRACT(HW_POWER_VDDACTRL, TRG);
s.vdda_linreg = HW_POWER_VDDACTRL & HW_POWER_VDDACTRL__ENABLE_LINREG;
s.vdda_linreg_offset = __XTRACT(HW_POWER_VDDACTRL, LINREG_OFFSET) == 0 ? 0 :
__XTRACT(HW_POWER_VDDACTRL, LINREG_OFFSET) == 1 ? 25 : -25;
}
if(flags & POWER_INFO_VDDIO)
{
s.vddio = HW_POWER_VDDIOCTRL__TRG_MIN + HW_POWER_VDDIOCTRL__TRG_STEP * __XTRACT(HW_POWER_VDDIOCTRL, TRG);
s.vddio_linreg_offset = __XTRACT(HW_POWER_VDDIOCTRL, LINREG_OFFSET) == 0 ? 0 :
__XTRACT(HW_POWER_VDDIOCTRL, LINREG_OFFSET) == 1 ? 25 : -25;
}
if(flags & POWER_INFO_VDDMEM)
{
s.vddmem = HW_POWER_VDDMEMCTRL__TRG_MIN + HW_POWER_VDDMEMCTRL__TRG_STEP * __XTRACT(HW_POWER_VDDMEMCTRL, TRG);
s.vddmem_linreg = HW_POWER_VDDMEMCTRL & HW_POWER_VDDMEMCTRL__ENABLE_LINREG;
}
if(flags & POWER_INFO_DCDC)
{
s.dcdc_sel_pllclk = HW_POWER_MISC & HW_POWER_MISC__SEL_PLLCLK;
s.dcdc_freqsel = dcdc_freqsel[__XTRACT(HW_POWER_MISC, FREQSEL)];
}
if(flags & POWER_INFO_CHARGE)
{
for(unsigned i = 0; i < ARRAYLEN(g_charger_current_bits); i++)
if(HW_POWER_CHARGE & g_charger_current_bits[i].bit)
s.charge_current += g_charger_current_bits[i].current;
for(unsigned i = 0; i < ARRAYLEN(g_charger_stop_current_bits); i++)
if(HW_POWER_CHARGE & g_charger_stop_current_bits[i].bit)
s.stop_current += g_charger_stop_current_bits[i].current;
s.charging = HW_POWER_STS & HW_POWER_STS__CHRGSTS;
s.batt_adj = HW_POWER_BATTMONITOR & HW_POWER_BATTMONITOR__ENBATADJ;
}
if(flags & POWER_INFO_4P2)
{
s._4p2_enable = HW_POWER_DCDC4P2 & HW_POWER_DCDC4P2__ENABLE_4P2;
s._4p2_dcdc = HW_POWER_DCDC4P2 & HW_POWER_DCDC4P2__ENABLE_DCDC;
s._4p2_cmptrip = __XTRACT(HW_POWER_DCDC4P2, CMPTRIP);
s._4p2_dropout = __XTRACT(HW_POWER_DCDC4P2, DROPOUT_CTRL);
}
if(flags & POWER_INFO_5V)
{
s._5v_pwd_charge_4p2 = HW_POWER_5VCTRL & HW_POWER_5VCTRL__PWD_CHARGE_4P2;
s._5v_dcdc_xfer = HW_POWER_5VCTRL & HW_POWER_5VCTRL__DCDC_XFER;
s._5v_enable_dcdc = HW_POWER_5VCTRL & HW_POWER_5VCTRL__ENABLE_DCDC;
for(unsigned i = 0; i < ARRAYLEN(g_4p2_charge_limit_bits); i++)
if(HW_POWER_5VCTRL & g_4p2_charge_limit_bits[i].bit)
s._5v_charge_4p2_limit += g_4p2_charge_limit_bits[i].current;
s._5v_vbusvalid_detect = HW_POWER_5VCTRL & HW_POWER_5VCTRL__VBUSVALID_5VDETECT;
s._5v_vbus_cmps = HW_POWER_5VCTRL & HW_POWER_5VCTRL__PWRUP_VBUS_CMPS;
s._5v_vbusvalid_thr =
__XTRACT(HW_POWER_5VCTRL, VBUSVALID_TRSH) == 0 ?
2900
: 3900 + __XTRACT(HW_POWER_5VCTRL, VBUSVALID_TRSH) * 100;
}
return s;
}
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