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authorScott Murray <scott.murray@konsulko.com>2019-12-29 18:36:48 -0500
committerScott Murray <scott.murray@konsulko.com>2019-12-29 20:01:49 -0500
commitfb407cc3cbb66df0a154ef400294d209fb681b22 (patch)
tree1e819555033a69625d1e2cd43cad92d2285f49db /recipes-kernel/sllin
parenta3690396cceb937fbc29aa774dbdeea54283f924 (diff)
Add virtual sllin support and LIN bridging to CAN for demos
To enable seeing the steering wheel LIN messages on the cluster board for the planned CES demo, a systemd unit that wraps the use of candump in bridging mode is added when the agl-cluster-support feature is enabled. To make sure that the sllin0 interface is always available for testing without the specific demo LIN hardware, a vcan interface is set up as sllin0 when the ttyUSB0 device representing the serial adapter for the LIN transceiver is not present. Since this virtual sllin0 interface is very useful for general testing of the steering wheel event support up through the low-can and signal-composer stack, it has not been hidden behind agl-cluster-demo-support. Bug-AGL: SPEC-3049 Change-Id: Idb478e3fe4085859e8704ab0329a341b1a11e0ef Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Diffstat (limited to 'recipes-kernel/sllin')
-rw-r--r--recipes-kernel/sllin/files/sllin-demo-virtual.service12
-rwxr-xr-x[-rw-r--r--]recipes-kernel/sllin/files/start_lin_demo.sh12
-rw-r--r--recipes-kernel/sllin/sllin.bb7
3 files changed, 27 insertions, 4 deletions
diff --git a/recipes-kernel/sllin/files/sllin-demo-virtual.service b/recipes-kernel/sllin/files/sllin-demo-virtual.service
new file mode 100644
index 000000000..788242197
--- /dev/null
+++ b/recipes-kernel/sllin/files/sllin-demo-virtual.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=LIN demo configuration (virtual)
+ConditionPathExists=!/dev/ttyUSB0
+After=afm-system-daemon.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/start_lin_demo.sh
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target
diff --git a/recipes-kernel/sllin/files/start_lin_demo.sh b/recipes-kernel/sllin/files/start_lin_demo.sh
index 4fcfcc6d2..26f64c0a1 100644..100755
--- a/recipes-kernel/sllin/files/start_lin_demo.sh
+++ b/recipes-kernel/sllin/files/start_lin_demo.sh
@@ -1,10 +1,14 @@
#!/bin/sh
# Attach serial LIN->CAN bridge and set up LIN polling
-sleep 1
-/usr/bin/lin_config -c /etc/lin_config.conf -a sllin:/dev/ttyUSB0
-pidof lin_config > /var/run/lin_config.pid
-sleep 1
+if [ -c /dev/ttyUSB0 ]; then
+ sleep 1
+ /usr/bin/lin_config -c /etc/lin_config.conf -a sllin:/dev/ttyUSB0
+ pidof lin_config > /var/run/lin_config.pid
+ sleep 1
+else
+ ip link add dev sllin0 type vcan
+fi
ip link set sllin0 up
# Initialize HVAC controller
diff --git a/recipes-kernel/sllin/sllin.bb b/recipes-kernel/sllin/sllin.bb
index 0478b21a7..7c4313f16 100644
--- a/recipes-kernel/sllin/sllin.bb
+++ b/recipes-kernel/sllin/sllin.bb
@@ -18,6 +18,7 @@ SRC_URI_append = " \
file://0003-Allow-recent-kernels-newer-4.11.x-to-build.patch;pnum=2 \
file://0001-Disable-sllin-driver-debug-log.patch;pnum=2 \
file://sllin-demo.service \
+ file://sllin-demo-virtual.service \
file://start_lin_demo.sh \
file://lin_config.conf \
"
@@ -29,16 +30,22 @@ SLLINBAUDRATE ??= "9600"
module_conf_sllin = "options sllin baudrate=${SLLINBAUDRATE}"
SYSTEMD_SERVICE_${PN} = "sllin-demo.service"
+SYSTEMD_SERVICE_${PN}-virtual = "sllin-demo-virtual.service"
do_install_append () {
install -d 644 ${D}/${bindir}
install -m 755 ${WORKDIR}/start_lin_demo.sh ${D}/${bindir}/start_lin_demo.sh
install -d ${D}${systemd_system_unitdir}
install -m 0644 ${WORKDIR}/sllin-demo.service ${D}${systemd_system_unitdir}/
+ install -m 0644 ${WORKDIR}/sllin-demo-virtual.service ${D}${systemd_system_unitdir}/
install -d ${D}${sysconfdir}
install -m 0644 ${WORKDIR}/lin_config.conf ${D}${sysconfdir}/
}
+PACKAGES =+ "${PN}-virtual"
+
FILES_${PN} += "${bindir}/start_lin_demo.sh ${sysconfdir}/lin_config.conf"
+FILES_${PN}-virtual = "${systemd_system_unitdir}/sllin-demo-virtual.service"
+
RDEPENDS_${PN} += "lin-config"