meta-agl-bsp: Add reference hardware GPS support

Add recipe for gpsd configuration for the reference hardware, which
also installs a script plus systemd unit drop-in to handle enabling
and disabling it.  The latter is required due to the reference
hardware's reuse of the h3ulcb image, which means the existing
PREFERRED_PROVIDER_virtual/gpsd-conf scheme is not sufficient in
this case.

Bug-AGL: SPEC-3792

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Ifaf3b93d06825f7c5c6a8ce2773d93931e47178c
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/25994
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>

4 files changed, 74 insertions, 0 deletions

diff --git a/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/gpsd.refhw b/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/gpsd.refhw
new file mode 100644
index 000000000..d22970681
--- /dev/null
+++ b/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/gpsd.refhw
@@ -0,0 +1,5 @@
+# Default settings for gpsd.
+START_DAEMON="true"
+GPSD_OPTIONS=""
+DEVICES="/dev/ttySC3"
+GPSD_SOCKET="/var/run/gpsd.sock"
diff --git a/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/refhw-gpsd-helper.sh b/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/refhw-gpsd-helper.sh
new file mode 100644
index 000000000..d183ba43c
--- /dev/null
+++ b/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/refhw-gpsd-helper.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+#
+# Script to detect AGL Reference Hardware and switch gpsd
+# configuration as necessary.
+#
+# NOTE:
+# For the most part errors are ignored and the script returns
+# 0/success so gpsd still be started if the script is somehow
+# run on a board without the expected hardware.
+
+COMPAT=/sys/firmware/devicetree/base/compatible
+GPSTTY=/dev/ttySC3
+
+#if [ ! \( -f "$COMPAT" -a -c "$GPSTTY" -a -f /etc/default/gpsd.refhw \) ]; then
+if [ ! \( -f "$COMPAT" -a -f /etc/default/gpsd.refhw \) ]; then
+    exit 0
+fi
+
+found=false
+for c in `cat $COMPAT | tr '\0' ' '`; do
+    if echo $c | grep -q '^agl,refhw-h3$'; then
+        found=true
+        break
+    fi
+done
+
+if $found; then
+    if [ ! -c "$GPSTTY" ]; then
+        exit 0
+    fi
+    update-alternatives --install /etc/default/gpsd gpsd-defaults /etc/default/gpsd.refhw 20
+else
+    update-alternatives --install /etc/default/gpsd gpsd-defaults /etc/default/gpsd.refhw 5
+fi
+exit 0
diff --git a/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/refhw-gpsd-helper.sh.bak b/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/refhw-gpsd-helper.sh.bak
new file mode 100644
index 000000000..2c9089aa0
--- /dev/null
+++ b/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/refhw-gpsd-helper.sh.bak
@@ -0,0 +1,32 @@
+#!/bin/sh
+#
+# Script to detect AGL Reference Hardware and switch gpdf configuration
+# as needed.
+#
+# NOTE:
+# For the most part errors are ignored and the script returns
+# 0/success so gpsd still be started if the script is somehow
+# run on a board without the expected hardware.
+
+COMPAT=/sys/firmware/devicetree/base/compatible
+GPSTTY=/dev/ttySC3
+
+if [ ! \( -f "$COMPAT" -a -c "$GPSTTY" -a -f /etc/default/gpsd.refhw \) ]; then
+    exit 0
+fi
+
+found=false
+for c in `cat $COMPAT | tr '\0' ' '`; do
+    echo "c = $c"
+    if echo $c | grep -q '^agl,refhw-h3$'; then
+        found=true
+        break
+    fi
+done
+
+if $found; then
+    update-alternatives --install /etc/default/gpsd gpsd-defaults /etc/default/gpsd.refhw 20
+else
+    update-alternatives --remove gpsd-defaults /etc/default/gpsd.refhw
+fi
+exit 0
diff --git a/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/refhw.conf b/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/refhw.conf
new file mode 100644
index 000000000..b7e3a7b0d
--- /dev/null
+++ b/meta-agl-bsp/meta-agl-refhw-gen3/recipes-navigation/gpsd/files/refhw.conf
@@ -0,0 +1,2 @@
+[Service]
+ExecStartPre=-/usr/sbin/refhw-gpsd-helper.sh