From 9d9c336b326682c8830d85532799c4783c02ca60 Mon Sep 17 00:00:00 2001
From: Jason Reiss <jreiss@multitech.com>
Date: Tue, 2 Mar 2021 11:02:39 -0600
Subject: lora: add sx1303 reset script

---
 .../lora/lora-gateway-sx1303/reset_lgw.sh          | 93 ++++++++++++++++++++++
 .../lora/lora-gateway-sx1303_2.0.1.bb              |  2 +
 2 files changed, 95 insertions(+)
 create mode 100644 recipes-connectivity/lora/lora-gateway-sx1303/reset_lgw.sh

diff --git a/recipes-connectivity/lora/lora-gateway-sx1303/reset_lgw.sh b/recipes-connectivity/lora/lora-gateway-sx1303/reset_lgw.sh
new file mode 100644
index 0000000..b58f0e9
--- /dev/null
+++ b/recipes-connectivity/lora/lora-gateway-sx1303/reset_lgw.sh
@@ -0,0 +1,93 @@
+#!/bin/sh
+
+# This script is intended to be used on SX1302 CoreCell platform, it performs
+# the following actions:
+#       - export/unpexort GPIO23 and GPIO18 used to reset the SX1302 chip and to enable the LDOs
+#       - export/unexport GPIO22 used to reset the optional SX1261 radio used for LBT/Spectral Scan
+#
+# Usage examples:
+#       ./reset_lgw.sh stop
+#       ./reset_lgw.sh start
+
+# GPIO mapping has to be adapted with HW
+#
+
+SX1302_RESET_PIN=23     # SX1302 reset
+SX1302_POWER_EN_PIN=18  # SX1302 power enable
+SX1261_RESET_PIN=22     # SX1261 reset (LBT / Spectral Scan)
+AD5338R_RESET_PIN=13    # AD5338R reset (full-duplex CN490 reference design)
+
+WAIT_GPIO() {
+    sleep 0.1
+}
+
+init() {
+    # setup GPIOs
+    echo "$SX1302_RESET_PIN" > /sys/class/gpio/export; WAIT_GPIO
+    echo "$SX1261_RESET_PIN" > /sys/class/gpio/export; WAIT_GPIO
+    echo "$SX1302_POWER_EN_PIN" > /sys/class/gpio/export; WAIT_GPIO
+    echo "$AD5338R_RESET_PIN" > /sys/class/gpio/export; WAIT_GPIO
+
+    # set GPIOs as output
+    echo "out" > /sys/class/gpio/gpio$SX1302_RESET_PIN/direction; WAIT_GPIO
+    echo "out" > /sys/class/gpio/gpio$SX1261_RESET_PIN/direction; WAIT_GPIO
+    echo "out" > /sys/class/gpio/gpio$SX1302_POWER_EN_PIN/direction; WAIT_GPIO
+    echo "out" > /sys/class/gpio/gpio$AD5338R_RESET_PIN/direction; WAIT_GPIO
+}
+
+reset() {
+    echo "CoreCell reset through GPIO$SX1302_RESET_PIN..."
+    echo "SX1261 reset through GPIO$SX1302_RESET_PIN..."
+    echo "CoreCell power enable through GPIO$SX1302_POWER_EN_PIN..."
+    echo "CoreCell ADC reset through GPIO$AD5338R_RESET_PIN..."
+
+    # write output for SX1302 CoreCell power_enable and reset
+    echo "1" > /sys/class/gpio/gpio$SX1302_POWER_EN_PIN/value; WAIT_GPIO
+
+    echo "1" > /sys/class/gpio/gpio$SX1302_RESET_PIN/value; WAIT_GPIO
+    echo "0" > /sys/class/gpio/gpio$SX1302_RESET_PIN/value; WAIT_GPIO
+
+    echo "0" > /sys/class/gpio/gpio$SX1261_RESET_PIN/value; WAIT_GPIO
+    echo "1" > /sys/class/gpio/gpio$SX1261_RESET_PIN/value; WAIT_GPIO
+
+    echo "0" > /sys/class/gpio/gpio$AD5338R_RESET_PIN/value; WAIT_GPIO
+    echo "1" > /sys/class/gpio/gpio$AD5338R_RESET_PIN/value; WAIT_GPIO
+}
+
+term() {
+    # cleanup all GPIOs
+    if [ -d /sys/class/gpio/gpio$SX1302_RESET_PIN ]
+    then
+        echo "$SX1302_RESET_PIN" > /sys/class/gpio/unexport; WAIT_GPIO
+    fi
+    if [ -d /sys/class/gpio/gpio$SX1261_RESET_PIN ]
+    then
+        echo "$SX1261_RESET_PIN" > /sys/class/gpio/unexport; WAIT_GPIO
+    fi
+    if [ -d /sys/class/gpio/gpio$SX1302_POWER_EN_PIN ]
+    then
+        echo "$SX1302_POWER_EN_PIN" > /sys/class/gpio/unexport; WAIT_GPIO
+    fi
+    if [ -d /sys/class/gpio/gpio$AD5338R_RESET_PIN ]
+    then
+        echo "$AD5338R_RESET_PIN" > /sys/class/gpio/unexport; WAIT_GPIO
+    fi
+}
+
+case "$1" in
+    start)
+    term # just in case
+    init
+    reset
+    ;;
+    stop)
+    reset
+    term
+    ;;
+    *)
+    echo "Usage: $0 {start|stop}"
+    exit 1
+    ;;
+esac
+
+exit 0
\ No newline at end of file
diff --git a/recipes-connectivity/lora/lora-gateway-sx1303_2.0.1.bb b/recipes-connectivity/lora/lora-gateway-sx1303_2.0.1.bb
index c5c2ab1..ca22751 100644
--- a/recipes-connectivity/lora/lora-gateway-sx1303_2.0.1.bb
+++ b/recipes-connectivity/lora/lora-gateway-sx1303_2.0.1.bb
@@ -13,6 +13,7 @@ PR = "r0"
 SRCREV = "V${PV}"
 
 SRC_URI = "git://github.com/Lora-net/sx1302_hal.git;protocol=git;branch=master \
+           file://reset_lgw.sh \
 "
 
 
@@ -36,6 +37,7 @@ do_install() {
   install -d ${D}${LORA_DIR}
   install -d ${D}${LORA_DIR}/forwarder-utils-sx1303
   install -d ${D}${LORA_DIR}/gateway-utils-sx1303
+  install -m 755 ${WORKDIR}/reset_lgw.sh ${D}${LORA_DIR}/
   install -m 755 packet_forwarder/lora_pkt_fwd ${D}${LORA_DIR}/lora_pkt_fwd_sx1303
   install -m 755 libloragw/test_loragw* ${D}${LORA_DIR}/gateway-utils-sx1303/
   install -m 755 util_boot/boot ${D}${LORA_DIR}/forwarder-utils-sx1303/util_boot
-- 
cgit v1.2.3