Initialize Git Repository: 'Raspberry-Pi-Bluetooth'

root/usr/bin/bthelper

@@ -0,0 +1,41 @@
+#!/usr/bin/env sh
+# For on-board BT, configure the BDADDR if necessary and route SCO packets
+# to the HCI interface (enables HFP/HSP)
+
+set -e
+
+if [ "$#" -ne '1' ]; then
+  /usr/bin/echo "Usage: ${0} <bluetooth hci device>"
+  exit 0
+fi
+
+DEV="${1}"
+
+# Need to bring hci up before looking at MAC as it can be all zeros during init
+/usr/bin/hciconfig "${DEV}" up
+if ! /usr/bin/hciconfig "${DEV}" | /usr/bin/grep --quiet 'Bus: UART'; then
+  /usr/bin/echo 'Not a UART-attached BT Modem'
+  exit 0
+fi
+
+if ( /usr/bin/hcitool -i "${DEV}" dev | /usr/bin/grep --extended-regexp --quiet '\s43:4[35]:|AA:AA:AA:AA:AA:AA' ); then
+  SERIAL=$(< '/proc/device-tree/serial-number' /usr/bin/cut '-c9-')
+  B1=$(/usr/bin/echo "${SERIAL}" | /usr/bin/cut '-c3-4')
+  B2=$(/usr/bin/echo "${SERIAL}" | /usr/bin/cut '-c5-6')
+  B3=$(/usr/bin/echo "${SERIAL}" | /usr/bin/cut '-c7-8')
+  BDADDR=$(/usr/bin/printf '0x%02x 0x%02x 0x%02x 0xeb 0x27 0xb8' $((0x$B3 ^ 0xaa)) $((0x$B2 ^ 0xaa)) $((0x$B1 ^ 0xaa)))
+
+  /usr/bin/hcitool -i "${DEV}" cmd 0x3f 0x001 "${BDADDR}"
+  /usr/bin/hciconfig "${DEV}" reset
+else
+  /usr/bin/echo 'Raspberry Pi BDADDR already set'
+fi
+
+# Route SCO packets to the HCI interface (enables HFP/HSP)
+/usr/bin/hcitool -i "${DEV}" cmd 0x3f 0x1c 0x01 0x02 0x00 0x01 0x01 > '/dev/null'
+
+# Force reinitialisation to allow extra features such as Secure Simple Pairing
+# to be enabled, for currently unknown reasons. This requires bluetoothd to be
+# running, which it isn't yet. Use this kludge of forking off another shell
+# with a delay, pending a complete understanding of the issues.
+(/usr/bin/sleep '5s'; /usr/bin/bluetoothctl power off; /usr/bin/bluetoothctl power on) &