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Fills in the stubs the Nano 3G port was left with, taking each from how the original firmware drives the same hardware. Testing evidence: firmware/target/arm/s5l8702/ipodnano3g/TESTING.md. Co-authored-by: Claude Opus 5 <noreply@anthropic.com> Change-Id: Iea5314769502f5941a176600869591756c5e3233
95 lines
2.4 KiB
C
95 lines
2.4 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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*
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* Copyright (C) 2009 by Bertrik Sikken
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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 "inttypes.h"
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#include "s5l87xx.h"
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#include "adc.h"
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#include "adc-target.h"
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#include "pmu-target.h"
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#include "kernel.h"
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/* Only the battery input is known: the original firmware selects it with
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* 0x24 and converts with 2500 mV + raw * 2000 mV / 1023 (measured: 4062 mV
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* on battery, 4110 mV charging). The USB data and accessory inputs are not
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* identified yet and read as 0. */
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static const struct pmu_adc_channel adc_channels[] =
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{
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[ADC_BATTERY] =
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{
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.name = "Battery",
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.mux = 0x24,
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.samples = 4,
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.offset_mv = 2500,
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.span_mv = 2000,
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},
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[ADC_USBDATA] =
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{
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.name = "USB data",
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},
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[ADC_ACCESSORY] =
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{
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.name = "Accessory",
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},
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};
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unsigned short adc_read_millivolts(int channel)
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{
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const struct pmu_adc_channel *ch = &adc_channels[channel];
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if (!ch->samples)
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return 0;
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return pmu_adc_raw2mv(ch, pmu_read_adc(ch));
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}
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/* Returns battery voltage [millivolts] */
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unsigned int adc_read_battery_voltage(void)
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{
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return adc_read_millivolts(ADC_BATTERY);
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}
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/* API functions */
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unsigned short adc_read(int channel)
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{
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const struct pmu_adc_channel *ch = &adc_channels[channel];
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return ch->samples ? pmu_read_adc(ch) : 0;
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}
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int adc_read_accessory_resistor(void)
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{
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return 0;
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}
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unsigned int adc_read_usbdata_voltage(bool dp)
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{
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(void)dp;
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return 0;
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}
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const char *adc_name(int channel)
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{
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return adc_channels[channel].name;
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}
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void adc_init(void)
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{
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}
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