60 lines
1.4 KiB
Bash
60 lines
1.4 KiB
Bash
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#!/bin/bash
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# PinePhone suspend / wakeup modem
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# /usr/lib/systemd/system-sleep/pinephone-modem-suspend.sh
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# DTR is:
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# - PL6/GPIO358 on BH (1.1)
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# - PB2/GPIO34 on CE (1.2)
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# AP_READY is:
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# - PL2/GPIO354 on BH (1.1)
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# - PH7/GPIO231 on CE (1.2)
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LOGFILE=/var/log/pp-suspend.log
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if grep -q 1.1 /proc/device-tree/model
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then
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DTR=358
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AP_READY=354
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else
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DTR=34
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AP_READY=231
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fi
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if [ ! -f ${LOGFILE} ]; then
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touch ${LOGFILE}
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fi
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prepare_suspend() {
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# Enable URC caching
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echo -ne 'AT+QCFG="urc/cache",1\r' > /dev/ttyS2
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# Put modem in power saving mode
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# Note: GPIO231 is WAKEUP_IN on BH and AP_READY on CE
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# - BH: WAKEUP_IN must be high to enable power saving mode
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# - CE: AP_READY (active low) must be high to indicate host sleep
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# In both cases DTR (GPIO358) must be high to enable power saving mode
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NOW=`date`
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echo "$NOW Entering suspend" >> ${LOGFILE}
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echo 1 > /sys/class/gpio/gpio${AP_READY}/value
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echo 1 > /sys/class/gpio/gpio${DTR}/value
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echo -ne 'AT+QSCLK=1\r' > /dev/ttyS2
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}
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resume_all() {
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# Wake up modem
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echo -ne 'AT+QSCLK=0\r' > /dev/ttyS2
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echo 0 > /sys/class/gpio/gpio${AP_READY}/value
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echo 0 > /sys/class/gpio/gpio${DTR}/value
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NOW=`date`
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echo "$NOW Exiting suspend" >> ${LOGFILE}
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# Disable URC caching
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echo -ne 'AT+QCFG="urc/cache",0\r' > /dev/ttyS2
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}
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case $1 in
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pre) prepare_suspend ;;
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post) resume_all ;;
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esac
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