111 lines
2.4 KiB
Bash
111 lines
2.4 KiB
Bash
#!/bin/sh
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#===============================================================================
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#
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# Copyright (C) 2025,2026, 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 ${0})"
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RETRIES=3
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HCI_IFACE="hci0"
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MODULE_NAME="hci_uart"
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if grep -qs '\<digi,ccmp13\>' /proc/device-tree/compatible; then
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# CCMP13 - BT_REG_EN - GPIO PD13
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GPIO_CHIP="GPIOD"
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GPIO_NUMBER="13"
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elif grep -qs '\<digi,ccmp15\>' /proc/device-tree/compatible; then
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# CCMP15 - BT_REG_EN - GPIO PZ6
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GPIO_CHIP="GPIOZ"
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GPIO_NUMBER="6"
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elif grep -qs '\<digi,ccimx95\>' /proc/device-tree/compatible; then
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# CCIMX95
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GPIO_CHIP="1"
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GPIO_NUMBER="18"
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fi
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log() {
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if type "systemd-cat" >/dev/null 2>/dev/null; then
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systemd-cat -p "${1}" -t "${SCRIPTNAME}" printf "%s" "${2}"
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else
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logger -p "${1}" -t "${SCRIPTNAME}" "${2}"
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fi
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}
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bt_power() {
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gpioset "${GPIO_CHIP}" "${GPIO_NUMBER}"="${1}"
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}
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set_btaddr() {
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hciconfig hci0 up
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sleep 0.2
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bt_addr=$(hexdump -v -e '1/1 "%02X "' /proc/device-tree/bluetooth/mac-address \
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| awk '{ for(i=NF; i>0; i--) printf "0x%s ", $i }' \
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| sed 's/ $//')
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hcitool -i hci0 cmd 0x3f 0x0001 ${bt_addr}
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hciconfig hci0 down
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sleep 0.2
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hciconfig hci0 up
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}
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is_kernel_module_loaded() {
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lsmod | grep -qs -w "^${MODULE_NAME}"
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}
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bt_init() {
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# If module is already loaded, skip
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is_kernel_module_loaded && log info "kernel module already present, skipping" && return 1
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for i in $(seq ${RETRIES}); do
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# Perform a power cycle
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bt_power 0
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sleep 0.5
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bt_power 1
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# Load manually the kernel module
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modprobe "${MODULE_NAME}"
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sleep 1
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# Reconfigure the HCI interface with the expected MAC address
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is_kernel_module_loaded && set_btaddr && log info "Bluetooth activated" && return 0
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log err "Cannot initialize Bluetooth, retrying..."
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done
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log err "Failed to initialize Bluetooth interface"
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return 1
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}
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bt_stop() {
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hciconfig ${HCI_IFACE} down
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# Unload HCI driver instance
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rmmod hci_uart
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rmmod btbcm
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# Disable Bluetooth chip
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bt_power 0 && log info "Bluetooth disabled" && return 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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