Initial commit

meta-ingrasys/meta-zaius/recipes-phosphor/chassis/avsbus-control.bb

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+SUMMARY = "Zaius AVSBus control"
+DESCRIPTION = "Voltage regulator module (VRM) AVSBus control for Zaius"
+PR = "r0"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/Apache-2.0;md5=89aea4e17d99a7cacdbeed46a0096b10"
+
+inherit obmc-phosphor-systemd
+
+TMPL_OFF = "avsbus-disable@.service"
+TMPL_ON = "avsbus-enable@.service"
+INSTFMT_OFF = "avsbus-disable@{0}.service"
+INSTFMT_ON = "avsbus-enable@{0}.service"
+TGTFMT_OFF = "obmc-host-stop@{0}.target"
+TGTFMT_ON = "obmc-chassis-poweron@{0}.target"
+FMT_OFF = "../${TMPL_OFF}:${TGTFMT_OFF}.wants/${INSTFMT_OFF}"
+FMT_ON = "../${TMPL_ON}:${TGTFMT_ON}.requires/${INSTFMT_ON}"
+
+SYSTEMD_SERVICE:${PN} += "${TMPL_OFF}"
+SYSTEMD_LINK:${PN} += "${@compose_list(d, 'FMT_OFF', 'OBMC_CHASSIS_INSTANCES')}"
+SYSTEMD_SERVICE:${PN} += "${TMPL_ON}"
+SYSTEMD_LINK:${PN} += "${@compose_list(d, 'FMT_ON', 'OBMC_CHASSIS_INSTANCES')}"
+
+SRC_URI += "file://zaius_avsbus.sh"
+RDEPENDS:${PN} += "i2c-tools"
+
+do_install() {
+        install -d ${D}${bindir}
+        install -m 0755 ${WORKDIR}/zaius_avsbus.sh ${D}${bindir}/zaius_avsbus.sh
+}

meta-ingrasys/meta-zaius/recipes-phosphor/chassis/avsbus-control/avsbus-disable@.service

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+[Unit]
+Description=Disable AVSBus on VRMs
+Wants=obmc-power-stop-pre@%i.target
+Before=obmc-power-stop-pre@%i.target
+Conflicts=obmc-host-startmin@%i.target
+ConditionPathExists=!/run/openbmc/chassis@%i-on
+
+[Service]
+ExecStart=/usr/bin/env zaius_avsbus.sh disable
+SyslogIdentifier=zaius_avsbus.sh
+Type=oneshot
+RemainAfterExit=yes
+
+[Install]
+WantedBy=obmc-host-stop@%i.target

meta-ingrasys/meta-zaius/recipes-phosphor/chassis/avsbus-control/avsbus-enable@.service

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+[Unit]
+Description=Enable AVSBus on VRMs
+Wants=obmc-host-start-pre@%i.target
+Before=obmc-host-start-pre@%i.target
+Conflicts=obmc-host-stop@%i.target
+ConditionPathExists=!/run/openbmc/chassis@%i-on
+
+[Service]
+ExecStart=/usr/bin/env zaius_avsbus.sh enable
+SyslogIdentifier=zaius_avsbus.sh
+Type=oneshot
+RemainAfterExit=yes
+
+[Install]
+RequiredBy=obmc-chassis-poweron@%i.target

meta-ingrasys/meta-zaius/recipes-phosphor/chassis/avsbus-control/zaius_avsbus.sh

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+#!/bin/sh -e
+# AVSBus control for PMBUS voltage regulator modules (VRMs)
+# Switches output voltage target between
+# - VOUT_COMMAND register (AVSBus disabled, default on Zaius)
+# - AVSBus target output (AVSBus enabled, voltage set by host)
+
+cpu0_i2c_bus="7"
+cpu1_i2c_bus="8"
+buses="$cpu0_i2c_bus $cpu1_i2c_bus"
+vdd_i2c_addr_page="0x60:0x01"
+vdn_i2c_addr_page="0x64:0x01"
+vcs_i2c_addr_page="0x64:0x00"
+addrs_pages="$vdd_i2c_addr_page $vdn_i2c_addr_page $vcs_i2c_addr_page"
+
+i2c_path="/sys/bus/i2c/devices/"
+
+# Usage: vrm_avs_enable <bus> <i2c_address> <page>
+# Initializes the AVSBus VOUT setpoint to the value in PMBus VOUT_COMMAND
+vrm_avs_enable()
+{
+    echo "Enabling AVSBus on bus $1 VRM @$2 rail $3..."
+    echo 1 > "${i2c_path}/$1-$(printf "%04x" "$2")/hwmon/hwmon*/avs$(printf "%d" "$3")_enable"
+}
+
+# Usage: vrm_avs_disable <bus> <i2c_address> <page>
+# Sets OPERATION PMBUS register to
+# - Enable/Disable: On
+# - VOUT Source: VOUT_COMMAND
+# - AVSBus Copy: VOUT_COMMAND remains unchanged
+vrm_avs_disable()
+{
+    echo "Disabling AVSBus on bus $1 VRM @$2 rail $3..."
+    echo 0 > "${i2c_path}/$1-$(printf "%04x" "$2")/hwmon/hwmon*/avs$(printf "%d" "$3")_enable"
+}
+
+# Usage: for_each_rail <command>
+# <command> will be invoked with <bus> <i2c_address> <page>
+for_each_rail()
+{
+    for bus in $buses
+    do
+        for addr_page in $addrs_pages
+        do
+            $1 "$bus" "$(echo "$addr_page" | tr : " ")"
+        done
+    done
+}
+
+if [ "$1" = "enable" ]
+then
+    for_each_rail vrm_avs_enable
+elif [ "$1" = "disable" ]
+then
+    for_each_rail vrm_avs_disable
+else
+    echo "\"$0 <enable|disable>\" to control whether VRMs use AVSBus"
+    echo "\"$0 <vdn_max>\" to set VDN rails VOUT_MAX to 1.1V"
+fi

meta-ingrasys/meta-zaius/recipes-phosphor/chassis/vcs-control.bb

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+SUMMARY = "Zaius VCS rail control"
+DESCRIPTION = "VCS voltage rail control implementation for Zaius"
+PR = "r0"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/Apache-2.0;md5=89aea4e17d99a7cacdbeed46a0096b10"
+
+inherit obmc-phosphor-systemd
+
+TMPL_OFF = "vcs-off@.service"
+TMPL_ON = "vcs-on@.service"
+INSTFMT_OFF = "vcs-off@{0}.service"
+INSTFMT_ON = "vcs-on@{0}.service"
+TGTFMT_OFF = "obmc-host-stop@{0}.target"
+TGTFMT_ON = "obmc-chassis-poweron@{0}.target"
+FMT_OFF = "../${TMPL_OFF}:${TGTFMT_OFF}.wants/${INSTFMT_OFF}"
+FMT_ON = "../${TMPL_ON}:${TGTFMT_ON}.requires/${INSTFMT_ON}"
+
+SYSTEMD_SERVICE:${PN} += "${TMPL_OFF}"
+SYSTEMD_LINK:${PN} += "${@compose_list(d, 'FMT_OFF', 'OBMC_CHASSIS_INSTANCES')}"
+SYSTEMD_SERVICE:${PN} += "${TMPL_ON}"
+SYSTEMD_LINK:${PN} += "${@compose_list(d, 'FMT_ON', 'OBMC_CHASSIS_INSTANCES')}"
+
+SRC_URI += "file://zaius_vcs.sh"
+RDEPENDS:${PN} += "bash i2c-tools"
+
+do_install() {
+        install -d ${D}${bindir}
+        install -m 0755 ${WORKDIR}/zaius_vcs.sh ${D}${bindir}/zaius_vcs.sh
+}

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