adbd2969e6
Add code to read USB D+/D- and accessory ADCs, it is shown in HW debug menu, might be useful in future for RB and/or the bootloader to identify external USB chargers. Change-Id: Ia48ca5e06bb7ddc52bb55abedde6734653ce8dba
469 lines
12 KiB
C
469 lines
12 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 "thread.h"
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#include "pmu-target.h"
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#include "adc-target.h"
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#include "i2c-s5l8702.h"
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#include "gpio-s5l8702.h"
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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_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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/*
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* ADC
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*/
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#define ADC_FULL_SCALE 2000
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#define ADC_FULL_SCALE_VISA 2400
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#define ADC_SUBTR_OFFSET 2250
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static struct mutex pmu_adc_mutex;
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/* converts raw 8/10-bit value to millivolts */
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unsigned short pmu_adc_raw2mv(
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const struct pmu_adc_channel *ch, unsigned short raw)
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{
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int full_scale = ADC_FULL_SCALE;
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int offset = 0;
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switch (ch->adcc1 & PCF5063X_ADCC1_ADCMUX_MASK)
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{
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case PCF5063X_ADCC1_MUX_BATSNS_RES:
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case PCF5063X_ADCC1_MUX_ADCIN2_RES:
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full_scale *= ((ch->adcc1 & PCF5063X_ADCC3_RES_DIV_MASK) ==
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PCF5063X_ADCC3_RES_DIV_TWO) ? 2 : 3;
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break;
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case PCF5063X_ADCC1_MUX_BATSNS_SUBTR:
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case PCF5063X_ADCC1_MUX_ADCIN2_SUBTR:
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offset = ADC_SUBTR_OFFSET;
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break;
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case PCF5063X_ADCC1_MUX_BATTEMP:
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if (ch->adcc2 & PCF5063X_ADCC2_RATIO_BATTEMP)
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full_scale = ADC_FULL_SCALE_VISA;
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break;
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case PCF5063X_ADCC1_MUX_ADCIN1:
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if (ch->adcc2 & PCF5063X_ADCC2_RATIO_ADCIN1)
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full_scale = ADC_FULL_SCALE_VISA;
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break;
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}
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int nrb = ((ch->adcc1 & PCF5063X_ADCC1_RES_MASK) ==
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PCF5063X_ADCC1_RES_8BIT) ? 8 : 10;
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return (raw * full_scale / ((1<<nrb)-1)) + offset;
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}
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/* returns raw value, 8 or 10-bit resolution */
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unsigned short pmu_read_adc(const struct pmu_adc_channel *ch)
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{
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mutex_lock(&pmu_adc_mutex);
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pmu_write(PCF5063X_REG_ADCC3, ch->adcc3);
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if (ch->bias_dly)
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sleep(ch->bias_dly);
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uint8_t buf[2] = { ch->adcc2, ch->adcc1 | PCF5063X_ADCC1_ADCSTART };
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pmu_write_multiple(PCF5063X_REG_ADCC2, 2, buf);
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int adcs3 = 0;
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while (!(adcs3 & PCF5063X_ADCS3_ADCRDY))
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{
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yield();
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adcs3 = pmu_read(PCF5063X_REG_ADCS3);
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}
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int raw = pmu_read(PCF5063X_REG_ADCS1);
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if ((ch->adcc1 & PCF5063X_ADCC1_RES_MASK) == PCF5063X_ADCC1_RES_10BIT)
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raw = (raw << 2) | (adcs3 & PCF5063X_ADCS3_ADCDAT1L_MASK);
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mutex_unlock(&pmu_adc_mutex);
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return raw;
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}
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/*
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* eINT
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*/
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#define Q_EINT 0
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static char pmu_thread_stack[DEFAULT_STACK_SIZE/2];
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static struct event_queue pmu_queue;
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static unsigned char ints_msk[6];
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static void pmu_eint_isr(struct eint_handler*);
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static struct eint_handler pmu_eint =
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{
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.gpio_n = GPIO_EINT_PMU,
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.type = EIC_INTTYPE_LEVEL,
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.level = EIC_INTLEVEL_LOW,
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.isr = pmu_eint_isr,
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};
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static int pmu_input_holdswitch;
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int pmu_holdswitch_locked(void)
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{
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return pmu_input_holdswitch;
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}
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#ifdef IPOD_ACCESSORY_PROTOCOL
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static int pmu_input_accessory;
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int pmu_accessory_present(void)
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{
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return pmu_input_accessory;
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}
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#endif
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#if CONFIG_CHARGING
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static int pmu_input_firewire;
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int pmu_firewire_present(void)
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{
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return pmu_input_firewire;
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}
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static void pmu_read_inputs_mbcs(void)
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{
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pmu_input_firewire = !!(pmu_read(PCF5063X_REG_MBCS1)
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& PCF5063X_MBCS1_ADAPTPRES);
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}
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#endif
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static void pmu_read_inputs_gpio(void)
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{
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pmu_input_holdswitch = !(pmu_read(PCF50635_REG_GPIOSTAT)
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& PCF50635_GPIOSTAT_GPIO2);
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}
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static void pmu_read_inputs_ooc(void)
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{
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unsigned char oocstat = pmu_read(PCF5063X_REG_OOCSTAT);
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if (oocstat & PCF5063X_OOCSTAT_EXTON2)
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usb_insert_int();
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else
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usb_remove_int();
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#ifdef IPOD_ACCESSORY_PROTOCOL
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pmu_input_accessory = !(oocstat & PCF5063X_OOCSTAT_EXTON3);
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#endif
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}
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static void pmu_eint_isr(struct eint_handler *h)
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{
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eint_unregister(h);
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queue_post(&pmu_queue, Q_EINT, 0);
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}
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static void NORETURN_ATTR pmu_thread(void)
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{
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struct queue_event ev;
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unsigned char ints[6];
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while (true)
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{
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queue_wait_w_tmo(&pmu_queue, &ev, TIMEOUT_BLOCK);
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switch (ev.id)
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{
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case Q_EINT:
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/* read (clear) PMU interrupts, this will also
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raise the PMU IRQ pin */
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pmu_read_multiple(PCF5063X_REG_INT1, 2, ints);
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ints[5] = pmu_read(PCF50635_REG_INT6);
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#if CONFIG_CHARGING
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if (ints[0] & ~ints_msk[0]) pmu_read_inputs_mbcs();
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#endif
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if (ints[1] & ~ints_msk[1]) pmu_read_inputs_ooc();
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if (ints[5] & ~ints_msk[5]) pmu_read_inputs_gpio();
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eint_register(&pmu_eint);
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break;
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case SYS_TIMEOUT:
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break;
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}
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}
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}
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/* main init */
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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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queue_init(&pmu_queue, false);
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create_thread(pmu_thread,
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pmu_thread_stack, sizeof(pmu_thread_stack), 0,
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"PMU" IF_PRIO(, PRIORITY_SYSTEM) IF_COP(, CPU));
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/* configure PMU interrutps */
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for (int i = 0; i < 6; i++)
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ints_msk[i] = 0xff;
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#if CONFIG_CHARGING
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ints_msk[0] &= ~PCF5063X_INT1_ADPINS & /* FireWire */
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~PCF5063X_INT1_ADPREM;
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#endif
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ints_msk[1] &= ~PCF5063X_INT2_EXTON2R & /* USB */
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~PCF5063X_INT2_EXTON2F;
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#ifdef IPOD_ACCESSORY_PROTOCOL
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ints_msk[1] &= ~PCF5063X_INT2_EXTON3R & /* Accessory */
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~PCF5063X_INT2_EXTON3F;
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#endif
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ints_msk[5] &= ~PCF50635_INT6_GPIO2; /* Holdswitch */
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pmu_write_multiple(PCF5063X_REG_INT1M, 5, ints_msk);
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pmu_write(PCF50635_REG_INT6M, ints_msk[5]);
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/* clear all */
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unsigned char ints[5];
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pmu_read_multiple(PCF5063X_REG_INT1, 5, ints);
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pmu_read(PCF50635_REG_INT6);
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/* get initial values */
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#if CONFIG_CHARGING
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pmu_read_inputs_mbcs();
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#endif
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pmu_read_inputs_ooc();
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pmu_read_inputs_gpio();
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eint_register(&pmu_eint);
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}
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/*
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* preinit
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*/
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int pmu_rd_multiple(int address, int count, unsigned char* buffer)
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{
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return i2c_rd(0, 0xe6, address, count, buffer);
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}
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int pmu_wr_multiple(int address, int count, unsigned char* buffer)
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{
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return i2c_wr(0, 0xe6, address, count, buffer);
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}
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unsigned char pmu_rd(int address)
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{
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unsigned char val;
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pmu_rd_multiple(address, 1, &val);
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return val;
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}
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int pmu_wr(int address, unsigned char val)
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{
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return pmu_wr_multiple(address, 1, &val);
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}
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void pmu_preinit(void)
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{
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static const char init_data[] =
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{
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/* reset OOC shutdown register */
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PCF5063X_REG_OOCSHDWN, 0x0,
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/* LDO_UNK1: 3000 mV, enabled */
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PCF5063X_REG_LDO1OUT, 0x15,
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PCF5063X_REG_LDO1ENA, 0x1,
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/* LDO_UNK2: 3000 mV, enabled */
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PCF5063X_REG_LDO2OUT, 0x15,
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PCF5063X_REG_LDO2ENA, 0x1,
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/* LDO_LCD: 3000 mV, enabled */
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PCF5063X_REG_LDO3OUT, 0x15,
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PCF5063X_REG_LDO3ENA, 0x1,
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/* LDO_CODEC: 1800 mV, enabled */
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PCF5063X_REG_LDO4OUT, 0x9,
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PCF5063X_REG_LDO4ENA, 0x1,
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/* LDO_UNK5: 3000 mV, disabled */
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PCF5063X_REG_LDO5OUT, 0x15,
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PCF5063X_REG_LDO5ENA, 0x0,
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/* LDO_CWHEEL: 3000 mV, ON when GPIO2 High */
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PCF5063X_REG_LDO6OUT, 0x15,
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PCF5063X_REG_LDO6ENA, 0x4,
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/* LDO_ACCY: 3300 mV, disabled */
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PCF5063X_REG_HCLDOOUT, 0x18,
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PCF5063X_REG_HCLDOENA, 0x0,
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/* LDO_CWHEEL is ON in STANDBY state,
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LDO_CWHEEL and MEMLDO are ON in UNKNOWN state (TBC) */
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PCF5063X_REG_STBYCTL1, 0x0,
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PCF5063X_REG_STBYCTL2, 0x8c,
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/* GPIO1,2 = input, GPIO3 = output High (NoPower default) */
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PCF5063X_REG_GPIOCTL, 0x3,
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PCF5063X_REG_GPIO1CFG, 0x0,
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PCF5063X_REG_GPIO2CFG, 0x0,
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PCF5063X_REG_GPIO3CFG, 0x7,
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/* DOWN2 converter (SDRAM): 1800 mV, enabled,
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startup current limit = 15mA*0x10 (TBC) */
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PCF5063X_REG_DOWN2OUT, 0x2f,
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PCF5063X_REG_DOWN2ENA, 0x1,
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PCF5063X_REG_DOWN2CTL, 0x0,
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PCF5063X_REG_DOWN2MXC, 0x10,
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/* MEMLDO: 1800 mV, enabled */
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PCF5063X_REG_MEMLDOOUT, 0x9,
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PCF5063X_REG_MEMLDOENA, 0x1,
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/* AUTOLDO (HDD): 3400 mV, disabled,
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limit = 1000 mA (40mA*0x19), limit always active */
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PCF5063X_REG_AUTOOUT, 0x6f,
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#ifdef BOOTLOADER
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PCF5063X_REG_AUTOENA, 0x0,
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#endif
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PCF5063X_REG_AUTOCTL, 0x0,
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PCF5063X_REG_AUTOMXC, 0x59,
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/* Vsysok = 3100 mV */
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PCF5063X_REG_SVMCTL, 0x8,
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/* Reserved */
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0x58, 0x0,
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/* Mask all PMU interrupts */
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PCF5063X_REG_INT1M, 0xff,
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PCF5063X_REG_INT2M, 0xff,
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PCF5063X_REG_INT3M, 0xff,
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PCF5063X_REG_INT4M, 0xff,
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PCF5063X_REG_INT5M, 0xff,
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PCF50635_REG_INT6M, 0xff,
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/* Wakeup on rising edge for EXTON1 and EXTON2,
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wakeup on falling edge for EXTON3 and !ONKEY,
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wakeup on RTC alarm, wakeup on adapter insert,
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Vbat status has no effect in state machine */
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PCF5063X_REG_OOCWAKE, 0xdf,
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PCF5063X_REG_OOCTIM1, 0xaa,
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PCF5063X_REG_OOCTIM2, 0x4a,
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PCF5063X_REG_OOCMODE, 0x5,
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PCF5063X_REG_OOCCTL, 0x27,
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/* GPO selection = LED external NFET drive signal */
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PCF5063X_REG_GPOCFG, 0x1,
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/* LED converter OFF, overvoltage protection enabled,
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OCP limit is 500 mA, led_dimstep = 16*0x6/32768 */
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#ifdef BOOTLOADER
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PCF5063X_REG_LEDENA, 0x0,
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#endif
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PCF5063X_REG_LEDCTL, 0x5,
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PCF5063X_REG_LEDDIM, 0x6,
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/* end marker */
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0
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};
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const char* ptr;
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for (ptr = init_data; *ptr != 0; ptr += 2)
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pmu_wr(ptr[0], ptr[1]);
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/* clear PMU interrupts */
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unsigned char rd_buf[5];
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pmu_rd_multiple(PCF5063X_REG_INT1, 5, rd_buf);
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pmu_rd(PCF50635_REG_INT6);
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}
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