Initial commit

meta-ingrasys/meta-zaius/recipes-phosphor/chassis/vcs-control/vcs-off@.service

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+[Unit]
+Description=Turn VCS rails off
+Wants=obmc-power-stop-pre@%i.target
+Before=obmc-power-stop-pre@%i.target
+Conflicts=obmc-host-startmin@%i.target
+
+[Service]
+ExecStart=/usr/bin/env zaius_vcs.sh off
+SyslogIdentifier=zaius_vcs.sh
+Type=oneshot
+RemainAfterExit=yes
+
+[Install]
+WantedBy=obmc-host-stop@%i.target

meta-ingrasys/meta-zaius/recipes-phosphor/chassis/vcs-control/vcs-on@.service

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+[Unit]
+Description=Turn VCS rails on
+Wants=vcs_workaround@%i.service
+After=vcs_workaround@%i.service
+Wants=obmc-host-start-pre@%i.target
+Before=obmc-host-start-pre@%i.target
+Conflicts=obmc-host-stop@%i.target
+
+[Service]
+ExecStart=/usr/bin/env zaius_vcs.sh on
+SyslogIdentifier=zaius_vcs.sh
+Type=oneshot
+RemainAfterExit=yes
+
+[Install]
+RequiredBy=obmc-chassis-poweron@%i.target

meta-ingrasys/meta-zaius/recipes-phosphor/chassis/vcs-control/zaius_vcs.sh

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+#!/bin/bash -e
+# Read and control VCS rails by sending the UCD power sequencer I2C commands.
+# This script assumes that the UCD is controlling VCS rails as GPIOs 5 and 6.
+# Also assumes that those GPIOs are already enabled.
+
+ucd_bus="0"
+ucd_addr="0x64"
+ucd_retries="5"
+
+retry()
+{
+    local i=0
+    until [ $i -ge $ucd_retries ]; do
+        i=$((i+1))
+        retry_output=$("$@") && break
+    done
+    local ret=$?
+    if [ $i -eq $ucd_retries ]; then exit $ret; fi
+}
+
+# Usage: ucd_get address
+# Result stored in $ucd_reg
+ucd_get()
+{
+    retry i2cget -f -y $ucd_bus $ucd_addr "$1" b
+    ucd_reg=$retry_output
+}
+
+# Usage: ucd_get address value
+ucd_set()
+{
+    retry i2cset -f -y $ucd_bus $ucd_addr "$1" "$2" b
+}
+
+vcs_set_gpios()
+{
+    echo -e "\tSetting UCD GPIO 5 to $1"
+    ucd_set 0xFA 5
+    ucd_set 0xFB "$1"
+    ucd_set 0xFB "$1"
+    echo -e "\tSetting UCD GPIO 6 to $1"
+    ucd_set 0xFA 6
+    ucd_set 0xFB "$1"
+    ucd_set 0xFB "$1"
+}
+
+vcs_get()
+{
+    echo Reading VCS settings
+    ucd_set 0xFA 5
+    ucd_get 0xFB
+    local val=
+    val=$(echo "$ucd_reg" | grep -i -c 0x0f)
+    echo -e "\tUCD GPIO 5 state=$val"
+    ucd_set 0xFA 6
+    ucd_get 0xFB
+    val=$(echo "$ucd_reg" | grep -i -c 0x0f)
+    echo -e "\tUCD GPIO 6 state=$val"
+}
+
+
+if [ "$1" == "on" ]; then
+    echo Turning on VCS
+    vcs_set_gpios 0x7
+elif [ "$1" == "off" ]; then
+    echo Turning off VCS
+    vcs_set_gpios 0x3
+else
+    vcs_get
+    echo "$0 <on|off>" to set state
+fi