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#!/bin/bash
function set_gpio() {
#$1 gpio pin
echo $1 > /sys/class/gpio/export
}
function set_gpio_direction(){
#$1 gpio pin, $2 'in','high','low'
echo $2 > /sys/class/gpio/gpio$1/direction
}
function read_gpio_input(){
#$1 read input gpio pin
cat /sys/class/gpio/gpio$1/value
}
function read_present_set_related_power(){
#$1 read present gpio, $2 output power gpio,$3 output direction
var=$(cat /sys/class/gpio/gpio$1/value)
# present 0 is plugged,present 1 is removal
if [ "$var" == "0" ];then
set_gpio_direction $2 "high"
else
set_gpio_direction $2 "low"
fi
}
## Initial U2_PRESNET_N
U2_PRESENT=( 148 149 150 151 152 153 154 155 )
for i in "${U2_PRESENT[@]}";
do
set_gpio $i;
set_gpio_direction $i 'in';
done
## Initial POWER_U2_EN
POWER_U2=( 195 196 202 199 198 197 127 126 )
for i in "${POWER_U2[@]}";
do
set_gpio $i;
done
## Initial PWRGD_U2
PWRGD_U2=( 161 162 163 164 165 166 167 168 )
for i in "${PWRGD_U2[@]}";
do
set_gpio $i;
set_gpio_direction $i 'in';
done
### Initial SSD Power reference U2_PRESNET_N
for i in {0..7};
do
read_present_set_related_power "${U2_PRESENT[$i]}" "${POWER_U2[$i]}";
done
exit 0;
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