77 lines
1.5 KiB
Bash
77 lines
1.5 KiB
Bash
#!/bin/sh
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#===============================================================================
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#
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# Copyright (C) 2024,2025 by Digi International Inc.
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# All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 2 as published by
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# the Free Software Foundation.
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#
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#
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# !Description: Initialize Bluetooth interface
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#
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#===============================================================================
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SCRIPTNAME="$(basename ${0})"
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RETRIES=3
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log() {
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if type "systemd-cat" >/dev/null 2>/dev/null; then
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systemd-cat -p "${1}" -t "${SCRIPTNAME}" printf "%s" "${2}"
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else
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logger -p "${1}" -t "${SCRIPTNAME}" "${2}"
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fi
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}
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bt_power() {
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#CCMP2 BT_REG_EN GPIO PZ5
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gpioset gpiochip11 5="${1}"
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}
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bt_init() {
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for i in $(seq ${RETRIES}); do
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# Perform a power cycle
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bt_power 0
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sleep 0.5
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bt_power 1
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# Load Bluetooth firmware on device
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if MBT_TRANSPORT=/dev/ttySTM1 timeout 10 mbt download /lib/firmware/brcm/CYW55500A1.hcd; then
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# Attach serial UART to the Bluetooth stack
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btattach -B /dev/ttySTM1 -P bcm -S 921600 &
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sleep 2
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# Up the interface to be able to send hci commands
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hciconfig hci0 up && log info "OK" && return 0
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fi
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log err "FAILED to bring hci0 up, retrying..."
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killall btattach 2> /dev/null
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done
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log err "FAILED (hci0 up)"
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return 1
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}
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bt_stop() {
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killall btattach
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bt_power 0
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}
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case "$1" in
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start)
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bt_init
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;;
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stop)
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bt_stop
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;;
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restart)
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$0 stop
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$0 start
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;;
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*)
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echo "Usage: $0 {start|stop|restart}"
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exit 1
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;;
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esac
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