um-service-cfg: Configuration support for user module services

User module provides few information over i2c bus, e.g. ip, version,..
Access /proc/device-tree/user_module/ for checking availability of user
module and get information and stores settings under /etc/user-module/
Port definitions for each services is provided through this recipe
and not through device tree. Would be nice feature for future improvements.

socket-uart and cannelloni depends on that recipe.

BugzID: 56443

Signed-off-by: Ramon Moesching <ramon.moesching@netmodule.com>

recipes-extended/um-service-cfg/files/um-rgpio-config.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Check whether user module is present and configure user space services
+Requires=um-service-config.service user-module.target
+After=um-service-config.service user-module.target
+
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/um-rgpio-config
+EnvironmentFile=/etc/user-module/network.conf
+
+[Install]
+WantedBy=user-module.target

recipes-extended/um-service-cfg/files/um-rgpio-config.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+UM_SYSFS_REMOTE_GPIO="/sys/class/remote-gpio/remote-gpio/config"
+
+if [ -z $USER_MODULE_ipv4_addr  ]; then
+    echo Start script by systemd service or set variables
+else
+    if [ -d $UM_SYSFS_REMOTE_GPIO ]; then
+        if [[ `cat $UM_SYSFS_REMOTE_GPIO/ip` !=  $USER_MODULE_ipv4_addr || `cat $UM_SYSFS_REMOTE_GPIO/port` !=  $USER_MODULE_ipv4_port ]]; then
+            echo $USER_MODULE_ipv4_addr > $UM_SYSFS_REMOTE_GPIO/ip
+            echo $USER_MODULE_remote_gpio_port > $UM_SYSFS_REMOTE_GPIO/port
+        fi
+        exit 0
+    fi
+fi
+exit 1

recipes-extended/um-service-cfg/files/um-service-config.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Check whether user module is present and configure user space services
+After=user-module.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/um-service-config
+
+[Install]
+WantedBy=user-module.target

recipes-extended/um-service-cfg/files/um-service-config.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+
+UM_CONFIG_PATH=/etc/user-module
+UM_CONFIG_FILE=network.conf
+UM_CONFIG=$UM_CONFIG_PATH/$UM_CONFIG_FILE
+UM_PORTS=$UM_CONFIG_PATH/ports
+
+UM_DTS_NODE=/proc/device-tree/user_module
+
+DEBUG_NOTE_ORIGIN=$0
+
+if [ -f $UM_CONFIG  ]; then
+    rm $UM_CONFIG
+else
+    mkdir -p $UM_CONFIG_PATH
+fi
+
+
+# fetch user module status and network informations
+for f in $UM_DTS_NODE/*; do
+    echo "USER_MODULE_${f##*/}=\"`cat $f`\"" | sed -E "s/,|-/_/g"  >> $UM_CONFIG
+done
+
+cat $UM_PORTS >> $UM_CONFIG
+
+# source all fetched informations
+source $UM_CONFIG
+
+if [[ $USER_MODULE_status = "disabled" ]]; then
+    exit 1
+fi
+
+ping $USER_MODULE_ipv4_addr -w 3 -c 1
+
+if [ $? -eq 0 ]; then
+    echo $DEBUG_NOTE_ORIGIN: Target with ipv4 $USER_MODULE_ipv4_addr available
+    exit 0
+else
+    echo $DEBUG_NOTE_ORIGIN: Target with ipv4 $USER_MODULE_ipv4_addr not available
+    exit 1
+fi
+

recipes-extended/um-service-cfg/files/user-module.target

@@ -0,0 +1,4 @@
+[Unit]
+Description=Just fetch user module informations from proc filesystem
+After=network-online.target
+Wants=network-online.target

recipes-extended/um-service-cfg/um-service-cfg_0.0.1.bb

@@ -0,0 +1,58 @@
+# Copyright (C) 2019 Ramon Moesching <ramon.moesching@netmodule.com>
+# Released under the MIT license (see COPYING.MIT for the terms)
+inherit systemd
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+FILESEXTRAPATHS_prepend := "${THISDIR}/config:"
+
+SRC_URI = " \
+			file://um-service-config.service \
+			file://um-service-config.sh \
+			file://user-module.target \
+            file://um-rgpio-config.sh \
+            file://um-rgpio-config.service \
+            file://ports \
+			"
+
+FILES_${PN} = "${systemd_unitdir}/system ${bindir} /etc/user-module"
+
+SYSTEMD_SERVICE_${PN} =" \ 
+                            um-service-config.service \
+                            um-rgpio-config.service \
+                            user-module.target \
+                        "
+
+do_install_append() {
+# port config
+    echo "USER_MODULE_kline_port=\"2202\"" >> ${WORKDIR}/ports
+    echo "USER_MODULE_lin_port=\"2200\"" >> ${WORKDIR}/ports
+    echo "USER_MODULE_uart_port=\"2204\"" >> ${WORKDIR}/ports
+    echo "USER_MODULE_cannellonie_port_remote=\"20000\"" >> ${WORKDIR}/ports
+    echo "USER_MODULE_cannellonie_port_local=\"20000\"" >> ${WORKDIR}/ports
+    echo "USER_MODULE_remote_gpio_port=\"6666\"" >> ${WORKDIR}/ports
+
+    install -d ${D}/etc/user-module
+    install -m 644 ${WORKDIR}/ports ${D}/etc/user-module/ports
+}
+
+
+do_install() {
+
+    install -d ${D}${systemd_unitdir}/system
+    install -m 644 ${WORKDIR}/um-service-config.service ${D}${systemd_unitdir}/system/
+
+    install -d ${D}${systemd_system_unitdir}/
+    install -m 0644 ${WORKDIR}/user-module.target ${D}${systemd_system_unitdir}/
+
+    install -d ${D}${systemd_system_unitdir}/multi-user.target.wants
+    ln -sf ${systemd_system_unitdir}/user-module.target ${D}${systemd_system_unitdir}/multi-user.target.wants/user-module.target
+
+    install -d ${D}${bindir}
+    install -m 744 ${WORKDIR}/um-service-config.sh ${D}${bindir}/um-service-config
+    
+    install -d ${D}${systemd_unitdir}/system
+    install -m 644 ${WORKDIR}/um-rgpio-config.service ${D}${systemd_unitdir}/system/
+    install -d ${D}${bindir}
+    install -m 744 ${WORKDIR}/um-rgpio-config.sh ${D}${bindir}/um-rgpio-config
+}
+