e2da3f47d3
Make sure DCDC is running at boot (it is disabled by default when 5V is present and we don't want to rely on the bootloader to change this). When changing the voltage on a regulator, it usually takes 2ms for the voltage to stabilize. In DCDC mode, there is an irq to notify about the event so use it ! This is especially important when changing cpu frequency because increasing the cpu freq while the voltage is rising is unreliable. Change-Id: Icfe9ef3ee90156d1e17da0820d9041859f7f3bca
361 lines
13 KiB
C
361 lines
13 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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* $Id$
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*
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* Copyright (C) 2011 by Amaury Pouly
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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 "system.h"
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#include "power.h"
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#include "string.h"
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#include "usb.h"
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#include "system-target.h"
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#include "power-imx233.h"
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#include "pinctrl-imx233.h"
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#include "fmradio_i2c.h"
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struct current_step_bit_t
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{
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unsigned current;
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uint32_t bit;
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};
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/* in decreasing order */
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static struct current_step_bit_t g_charger_current_bits[] =
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{
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{ 400, HW_POWER_CHARGE__BATTCHRG_I__400mA },
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{ 200, HW_POWER_CHARGE__BATTCHRG_I__200mA },
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{ 100, HW_POWER_CHARGE__BATTCHRG_I__100mA },
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{ 50, HW_POWER_CHARGE__BATTCHRG_I__50mA },
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{ 20, HW_POWER_CHARGE__BATTCHRG_I__20mA },
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{ 10, HW_POWER_CHARGE__BATTCHRG_I__10mA }
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};
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/* in decreasing order */
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static struct current_step_bit_t g_charger_stop_current_bits[] =
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{
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{ 100, HW_POWER_CHARGE__STOP_ILIMIT__100mA },
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{ 50, HW_POWER_CHARGE__STOP_ILIMIT__50mA },
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{ 20, HW_POWER_CHARGE__STOP_ILIMIT__20mA },
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{ 10, HW_POWER_CHARGE__STOP_ILIMIT__10mA }
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};
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/* in decreasing order */
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static struct current_step_bit_t g_4p2_charge_limit_bits[] =
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{
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{ 400, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__400mA },
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{ 200, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__200mA },
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{ 100, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__100mA },
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{ 50, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__50mA },
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{ 20, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__20mA },
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{ 10, HW_POWER_5VCTRL__CHARGE_4P2_ILIMIT__10mA }
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};
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void INT_VDD5V(void)
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{
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if(HW_POWER_CTRL & HW_POWER_CTRL__VBUSVALID_IRQ)
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{
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if(HW_POWER_STS & HW_POWER_STS__VBUSVALID)
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usb_insert_int();
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else
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usb_remove_int();
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/* reverse polarity */
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__REG_TOG(HW_POWER_CTRL) = HW_POWER_CTRL__POLARITY_VBUSVALID;
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/* enable int */
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__REG_CLR(HW_POWER_CTRL) = HW_POWER_CTRL__VBUSVALID_IRQ;
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}
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}
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void power_init(void)
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{
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/* setup vbusvalid parameters: set threshold to 4v and power up comparators */
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__REG_CLR(HW_POWER_5VCTRL) = HW_POWER_5VCTRL__VBUSVALID_TRSH_BM;
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__REG_SET(HW_POWER_5VCTRL) = HW_POWER_5VCTRL__VBUSVALID_TRSH_4V |
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HW_POWER_5VCTRL__PWRUP_VBUS_CMPS;
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/* enable vbusvalid detection method for the dcdc (improves efficiency) */
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__REG_SET(HW_POWER_5VCTRL) = HW_POWER_5VCTRL__VBUSVALID_5VDETECT;
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/* clear vbusvalid irq and set correct polarity */
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__REG_CLR(HW_POWER_CTRL) = HW_POWER_CTRL__VBUSVALID_IRQ;
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if(HW_POWER_STS & HW_POWER_STS__VBUSVALID)
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__REG_CLR(HW_POWER_CTRL) = HW_POWER_CTRL__POLARITY_VBUSVALID;
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else
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__REG_SET(HW_POWER_CTRL) = HW_POWER_CTRL__POLARITY_VBUSVALID;
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__REG_SET(HW_POWER_CTRL) = HW_POWER_CTRL__ENIRQ_VBUS_VALID;
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imx233_icoll_enable_interrupt(INT_SRC_VDD5V, true);
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/* setup linear regulator offsets to 25 mV below to prevent contention between
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* linear regulators and DCDC */
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__FIELD_SET(HW_POWER_VDDDCTRL, LINREG_OFFSET, 2);
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__FIELD_SET(HW_POWER_VDDACTRL, LINREG_OFFSET, 2);
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__FIELD_SET(HW_POWER_VDDIOCTRL, LINREG_OFFSET, 2);
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/* enable DCDC (more efficient) */
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__REG_SET(HW_POWER_5VCTRL) = HW_POWER_5VCTRL__ENABLE_DCDC;
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/* enable a few bits controlling the DC-DC as recommended by Freescale */
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__REG_SET(HW_POWER_LOOPCTRL) = HW_POWER_LOOPCTRL__TOGGLE_DIF |
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HW_POWER_LOOPCTRL__EN_CM_HYST;
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__FIELD_SET(HW_POWER_LOOPCTRL, EN_RCSCALE, HW_POWER_LOOPCTRL__EN_RCSCALE__2X);
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}
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void power_off(void)
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{
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/* wait a bit, useful for the user to stop touching anything */
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sleep(HZ / 2);
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#ifdef SANSA_FUZEPLUS
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/* This pin seems to be important to shutdown the hardware properly */
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imx233_pinctrl_acquire_pin(0, 9, "power off");
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imx233_set_pin_function(0, 9, PINCTRL_FUNCTION_GPIO);
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imx233_enable_gpio_output(0, 9, true);
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imx233_set_gpio_output(0, 9, true);
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#endif
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/* power down */
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HW_POWER_RESET = HW_POWER_RESET__UNLOCK | HW_POWER_RESET__PWD;
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while(1);
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}
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unsigned int power_input_status(void)
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{
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return (usb_detect() == USB_INSERTED)
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? POWER_INPUT_MAIN_CHARGER : POWER_INPUT_NONE;
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}
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bool charging_state(void)
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{
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return HW_POWER_STS & HW_POWER_STS__CHRGSTS;
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}
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void imx233_power_set_charge_current(unsigned current)
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{
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__REG_CLR(HW_POWER_CHARGE) = HW_POWER_CHARGE__BATTCHRG_I_BM;
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/* find closest current LOWER THAN OR EQUAL TO the expected current */
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for(unsigned i = 0; i < ARRAYLEN(g_charger_current_bits); i++)
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if(current >= g_charger_current_bits[i].current)
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{
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current -= g_charger_current_bits[i].current;
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__REG_SET(HW_POWER_CHARGE) = g_charger_current_bits[i].bit;
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}
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}
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void imx233_power_set_stop_current(unsigned current)
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{
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__REG_CLR(HW_POWER_CHARGE) = HW_POWER_CHARGE__STOP_ILIMIT_BM;
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/* find closest current GREATHER THAN OR EQUAL TO the expected current */
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unsigned sum = 0;
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for(unsigned i = 0; i < ARRAYLEN(g_charger_stop_current_bits); i++)
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sum += g_charger_stop_current_bits[i].current;
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for(unsigned i = 0; i < ARRAYLEN(g_charger_stop_current_bits); i++)
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{
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sum -= g_charger_stop_current_bits[i].current;
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if(current > sum)
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{
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current -= g_charger_stop_current_bits[i].current;
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__REG_SET(HW_POWER_CHARGE) = g_charger_stop_current_bits[i].bit;
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}
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}
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}
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/* regulator info */
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#define HAS_BO (1 << 0)
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#define HAS_LINREG (1 << 1)
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#define HAS_LINREG_OFFSET (1 << 2)
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static struct
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{
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unsigned min, step;
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volatile uint32_t *reg;
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uint32_t trg_bm, trg_bp; // bitmask and bitpos
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unsigned flags;
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uint32_t bo_bm, bo_bp; // bitmask and bitpos
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uint32_t linreg_bm;
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uint32_t linreg_offset_bm, linreg_offset_bp; // bitmask and bitpos
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} regulator_info[] =
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{
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#define ADD_REGULATOR(name, mask) \
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.min = HW_POWER_##name##CTRL__TRG_MIN, \
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.step = HW_POWER_##name##CTRL__TRG_STEP, \
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.reg = &HW_POWER_##name##CTRL, \
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.trg_bm = HW_POWER_##name##CTRL__TRG_BM, \
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.trg_bp = HW_POWER_##name##CTRL__TRG_BP, \
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.flags = mask
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#define ADD_REGULATOR_BO(name) \
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.bo_bm = HW_POWER_##name##CTRL__BO_OFFSET_BM, \
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.bo_bp = HW_POWER_##name##CTRL__BO_OFFSET_BP
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#define ADD_REGULATOR_LINREG(name) \
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.linreg_bm = HW_POWER_##name##CTRL__ENABLE_LINREG
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#define ADD_REGULATOR_LINREG_OFFSET(name) \
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.linreg_offset_bm = HW_POWER_##name##CTRL__LINREG_OFFSET_BM, \
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.linreg_offset_bp = HW_POWER_##name##CTRL__LINREG_OFFSET_BP
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[REGULATOR_VDDD] =
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{
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ADD_REGULATOR(VDDD, HAS_BO|HAS_LINREG|HAS_LINREG_OFFSET),
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ADD_REGULATOR_BO(VDDD),
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ADD_REGULATOR_LINREG(VDDD),
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ADD_REGULATOR_LINREG_OFFSET(VDDD)
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},
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[REGULATOR_VDDA] =
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{
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ADD_REGULATOR(VDDA, HAS_BO|HAS_LINREG|HAS_LINREG_OFFSET),
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ADD_REGULATOR_BO(VDDA),
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ADD_REGULATOR_LINREG(VDDA),
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ADD_REGULATOR_LINREG_OFFSET(VDDA)
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},
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[REGULATOR_VDDIO] =
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{
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ADD_REGULATOR(VDDIO, HAS_BO|HAS_LINREG_OFFSET),
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ADD_REGULATOR_BO(VDDIO),
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ADD_REGULATOR_LINREG_OFFSET(VDDIO)
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},
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[REGULATOR_VDDMEM] =
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{
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ADD_REGULATOR(VDDMEM, HAS_LINREG),
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ADD_REGULATOR_LINREG(VDDMEM),
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},
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};
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void imx233_power_get_regulator(enum imx233_regulator_t reg, unsigned *value_mv,
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unsigned *brownout_mv)
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{
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uint32_t reg_val = *regulator_info[reg].reg;
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/* read target value */
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unsigned raw_val = (reg_val & regulator_info[reg].trg_bm) >> regulator_info[reg].trg_bp;
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/* convert it to mv */
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if(value_mv)
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*value_mv = regulator_info[reg].min + regulator_info[reg].step * raw_val;
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if(regulator_info[reg].flags & HAS_BO)
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{
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/* read brownout offset */
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unsigned raw_bo = (reg_val & regulator_info[reg].bo_bm) >> regulator_info[reg].bo_bp;
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/* convert it to mv */
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if(brownout_mv)
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*brownout_mv = regulator_info[reg].min + regulator_info[reg].step * (raw_val - raw_bo);
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}
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else if(brownout_mv)
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*brownout_mv = 0;
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}
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void imx233_power_set_regulator(enum imx233_regulator_t reg, unsigned value_mv,
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unsigned brownout_mv)
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{
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// compute raw values
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unsigned raw_val = (value_mv - regulator_info[reg].min) / regulator_info[reg].step;
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unsigned raw_bo_offset = (value_mv - brownout_mv) / regulator_info[reg].step;
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// clear dc-dc ok flag
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__REG_SET(HW_POWER_CTRL) = HW_POWER_CTRL__DC_OK_IRQ;
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// update
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uint32_t reg_val = (*regulator_info[reg].reg) & ~regulator_info[reg].trg_bm;
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reg_val |= raw_val << regulator_info[reg].trg_bp;
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if(regulator_info[reg].flags & HAS_BO)
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{
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reg_val &= ~regulator_info[reg].bo_bm;
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reg_val |= raw_bo_offset << regulator_info[reg].bo_bp;
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}
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*regulator_info[reg].reg = reg_val;
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/* Wait until regulator is stable (ie brownout condition is gone)
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* If DC-DC is used, we can use the DCDC_OK irq
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* Otherwise it is unreliable (doesn't work when lowering voltage on linregs)
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* It usually takes between 0.5ms and 2.5ms */
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if(!(HW_POWER_5VCTRL & HW_POWER_5VCTRL__ENABLE_DCDC))
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panicf("regulator %d: wait for voltage stabilize in linreg mode !", reg);
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unsigned timeout = current_tick + (HZ * 20) / 1000;
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while(!(HW_POWER_CTRL & HW_POWER_CTRL__DC_OK_IRQ) || !TIME_AFTER(current_tick, timeout))
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yield();
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if(!(HW_POWER_CTRL & HW_POWER_CTRL__DC_OK_IRQ))
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panicf("regulator %d: failed to stabilize", reg);
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}
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// offset is -1,0 or 1
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void imx233_power_get_regulator_linreg(enum imx233_regulator_t reg,
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bool *enabled, int *linreg_offset)
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{
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if(enabled && regulator_info[reg].flags & HAS_LINREG)
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*enabled = !!(*regulator_info[reg].reg & regulator_info[reg].linreg_bm);
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else if(enabled)
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*enabled = true;
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if(regulator_info[reg].flags & HAS_LINREG_OFFSET)
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{
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unsigned v = (*regulator_info[reg].reg & regulator_info[reg].linreg_offset_bm);
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v >>= regulator_info[reg].linreg_offset_bp;
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if(linreg_offset)
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*linreg_offset = (v == 0) ? 0 : (v == 1) ? 1 : -1;
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}
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else if(linreg_offset)
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*linreg_offset = 0;
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}
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// offset is -1,0 or 1
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/*
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void imx233_power_set_regulator_linreg(enum imx233_regulator_t reg,
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bool enabled, int linreg_offset)
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{
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}
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*/
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struct imx233_power_info_t imx233_power_get_info(unsigned flags)
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{
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static int dcdc_freqsel[8] = {
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[HW_POWER_MISC__FREQSEL__RES] = 0,
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[HW_POWER_MISC__FREQSEL__20MHz] = 20000,
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[HW_POWER_MISC__FREQSEL__24MHz] = 24000,
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[HW_POWER_MISC__FREQSEL__19p2MHz] = 19200,
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[HW_POWER_MISC__FREQSEL__14p4MHz] = 14200,
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[HW_POWER_MISC__FREQSEL__18MHz] = 18000,
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[HW_POWER_MISC__FREQSEL__21p6MHz] = 21600,
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[HW_POWER_MISC__FREQSEL__17p28MHz] = 17280,
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};
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struct imx233_power_info_t s;
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memset(&s, 0, sizeof(s));
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if(flags & POWER_INFO_DCDC)
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{
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s.dcdc_sel_pllclk = HW_POWER_MISC & HW_POWER_MISC__SEL_PLLCLK;
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s.dcdc_freqsel = dcdc_freqsel[__XTRACT(HW_POWER_MISC, FREQSEL)];
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}
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if(flags & POWER_INFO_CHARGE)
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{
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for(unsigned i = 0; i < ARRAYLEN(g_charger_current_bits); i++)
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if(HW_POWER_CHARGE & g_charger_current_bits[i].bit)
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s.charge_current += g_charger_current_bits[i].current;
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for(unsigned i = 0; i < ARRAYLEN(g_charger_stop_current_bits); i++)
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if(HW_POWER_CHARGE & g_charger_stop_current_bits[i].bit)
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s.stop_current += g_charger_stop_current_bits[i].current;
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s.charging = HW_POWER_STS & HW_POWER_STS__CHRGSTS;
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s.batt_adj = HW_POWER_BATTMONITOR & HW_POWER_BATTMONITOR__ENBATADJ;
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}
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if(flags & POWER_INFO_4P2)
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{
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s._4p2_enable = HW_POWER_DCDC4P2 & HW_POWER_DCDC4P2__ENABLE_4P2;
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s._4p2_dcdc = HW_POWER_DCDC4P2 & HW_POWER_DCDC4P2__ENABLE_DCDC;
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s._4p2_cmptrip = __XTRACT(HW_POWER_DCDC4P2, CMPTRIP);
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s._4p2_dropout = __XTRACT(HW_POWER_DCDC4P2, DROPOUT_CTRL);
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}
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if(flags & POWER_INFO_5V)
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{
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s._5v_pwd_charge_4p2 = HW_POWER_5VCTRL & HW_POWER_5VCTRL__PWD_CHARGE_4P2;
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s._5v_dcdc_xfer = HW_POWER_5VCTRL & HW_POWER_5VCTRL__DCDC_XFER;
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s._5v_enable_dcdc = HW_POWER_5VCTRL & HW_POWER_5VCTRL__ENABLE_DCDC;
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for(unsigned i = 0; i < ARRAYLEN(g_4p2_charge_limit_bits); i++)
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if(HW_POWER_5VCTRL & g_4p2_charge_limit_bits[i].bit)
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s._5v_charge_4p2_limit += g_4p2_charge_limit_bits[i].current;
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s._5v_vbusvalid_detect = HW_POWER_5VCTRL & HW_POWER_5VCTRL__VBUSVALID_5VDETECT;
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s._5v_vbus_cmps = HW_POWER_5VCTRL & HW_POWER_5VCTRL__PWRUP_VBUS_CMPS;
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s._5v_vbusvalid_thr =
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__XTRACT(HW_POWER_5VCTRL, VBUSVALID_TRSH) == 0 ?
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2900
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: 3900 + __XTRACT(HW_POWER_5VCTRL, VBUSVALID_TRSH) * 100;
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}
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return s;
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}
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