66aa00d3e0
This is an improvement for the special mode present in the samsung ypr0 target. Apart adding new useful functionalities, it fixes a random disconnection bug, solved by debouncing and fully support to YP-R1 target. This opens also the possibility to interface this operating mode to rockbox USB functionality. Change-Id: Id70541541fcfaa1234328485fab0696a3bd491c9
63 lines
2.7 KiB
C
63 lines
2.7 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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* Samsung YP-R1 runtime USB cable detection
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*
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* Copyright (C) 2013 Lorenzo Miori
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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 <sys/ioctl.h>
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#include <fcntl.h>
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#include <unistd.h>
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#define IOCTL_PMU_MAGIC 'A'
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#define E_IOCTL_PMU_GET_BATT_LVL 0
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#define E_IOCTL_PMU_GET_CHG_STATUS 1
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#define E_IOCTL_PMU_IS_EXT_PWR 2
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#define E_IOCTL_PMU_STOP_CHG 3
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#define E_IOCTL_PMU_START_CHG 4
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#define E_IOCTL_PMU_IS_EXT_PWR_OVP 5
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#define E_IOCTL_PMU_LCD_DIM_CTRL 6
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#define E_IOCTL_PMU_CORE_CTL_HIGH 7
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#define E_IOCTL_PMU_CORE_CTL_LOW 8
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#define E_IOCTL_PMU_TSP_USB_PWR_OFF 9
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#define IOCTL_PMU_GET_BATT_LVL _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_GET_BATT_LVL)
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#define IOCTL_PMU_GET_CHG_STATUS _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_GET_CHG_STATUS)
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#define IOCTL_PMU_IS_EXT_PWR _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_IS_EXT_PWR)
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#define IOCTL_PMU_STOP_CHG _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_STOP_CHG)
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#define IOCTL_PMU_START_CHG _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_START_CHG)
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#define IOCTL_PMU_IS_EXT_PWR_OVP _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_IS_EXT_PWR_OVP)
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#define IOCTL_PMU_LCD_DIM_CTRL _IOW(IOCTL_PMU_MAGIC, E_IOCTL_PMU_LCD_DIM_CTRL, int)
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#define IOCTL_PMU_CORE_CTL_HIGH _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_CORE_CTL_HIGH)
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#define IOCTL_PMU_CORE_CTL_LOW _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_CORE_CTL_LOW)
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#define IOCTL_PMU_TSP_USB_PWR_OFF _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_TSP_USB_PWR_OFF)
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/*
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* This is a very simple program that runs on device.
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* It returns error code either 0 when (power/usb) cable
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* is not connected or >= 1 if connected.
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*/
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int main(void)
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{
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int state = -1;
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int dev = open("/dev/r1Pmu", O_RDONLY);
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state = ioctl(dev, IOCTL_PMU_IS_EXT_PWR);
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close(dev);
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return state;
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}
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