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9e2c85e076
This is part of the preparation to add support for iPod Nano 3G and Nano 4G. There are some optimisations left, like merging similar blocks of registers that share the same layout, but the base address have changed between SoC generations. Change-Id: I4f06727b4061977141b65d39ae19591bd5b29680
104 lines
2.9 KiB
C
104 lines
2.9 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 © 2009 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 <stdbool.h>
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#include "config.h"
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#include "s5l87xx.h"
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#include "power.h"
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/* Power handling for the S5L8700 based Samsung YP-S3
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Pins involved in power management:
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* P0.1: stay powered up (even with the USB cable unplugged)
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* P1.1: USB power detect
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* P4.7: tuner power/enable
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* P5.2: unknown output
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* P5.3: unknown output, related to charging (perhaps charge current?)
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* P5.4: charge status input (only valid if charger enabled)
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* P5.6: charger enable
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*/
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void power_off(void)
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{
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/* take down P0.1 to power off (plugged USB cable overrides this though) */
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PDAT0 &= ~(1 << 1);
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while(1); /* wait for system to shut down */
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}
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void power_init(void)
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{
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/* configure P0.1 as output for power-up and stay powered up */
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PCON0 = (PCON0 & ~(3 << 2)) | (1 << 2);
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PDAT0 |= (1 << 1);
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/* configure P1.1 as input for USB power detect */
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PCON1 = (PCON1 & ~0x000000F0) | 0x00000000;
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/* configure P4.7 as output for tuner power and turn power off */
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PCON4 = (PCON4 & ~0xF0000000) | 0x10000000;
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PDAT4 &= ~(1 << 7);
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/* configure P5.2 / P5.3 / P5.6 as output, P5.4 as input */
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PCON5 = (PCON5 & ~0x0F0FFF00) | 0x01001100;
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PDAT5 &= ~((1 << 2) | (1 << 3) | (1 << 6));
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}
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#if CONFIG_CHARGING
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unsigned int power_input_status(void)
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{
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/* check USB power on P1.1 */
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if (PDAT1 & (1 << 1)) {
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return POWER_INPUT_USB;
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}
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return POWER_INPUT_NONE;
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}
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bool charging_state(void)
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{
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/* check if charger is enabled */
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if (PDAT5 & (1 << 6)) {
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/* check if charging is busy */
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return (PDAT5 & (1 << 4));
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}
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return false;
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}
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#endif /* CONFIG_CHARGING */
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#if CONFIG_TUNER
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bool tuner_power(bool status)
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{
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if (status) {
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PDAT4 |= (1 << 7);
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}
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else {
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PDAT4 &= ~(1 << 7);
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}
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/* TODO what should we return here? */
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return status;
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}
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bool tuner_powered(void)
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{
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return (PDAT4 & (1 << 7));
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}
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#endif /* CONFIG_TUNER */
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