111 lines
2.6 KiB
Bash
111 lines
2.6 KiB
Bash
#!/bin/sh
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#===============================================================================
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#
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# Copyright (C) 2023,2024, 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 hardware
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#
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#===============================================================================
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HCI_IFACE="hci0"
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MODULE_NAME="btnxpuart"
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log() {
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printf "<3>iw61x-bluetooth: %s\n" "${1}" >/dev/kmsg
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}
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# The power of the IW61x chip is managed by the WiFi DT entry.
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# If WiFi is disabled, is needed to manage the power manually.
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is_not_wifi() {
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! [ -e "/proc/device-tree/wireless/mac-address" ]
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}
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power() {
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is_not_wifi && gpioset ##BT_GPIO##="${1}"
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}
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set_btaddr() {
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hciconfig ${HCI_IFACE} up
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sleep 0.2
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bt_addr=$(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 ${HCI_IFACE} cmd 0x3f 0x0022 0xfe 0x06 ${bt_addr}
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hciconfig ${HCI_IFACE} down
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sleep 0.2
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hciconfig ${HCI_IFACE} up
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}
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set_power_config() {
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sh -e /lib/firmware/nxp/bt_power_config_US_CA_JP.sh
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}
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is_kernel_module_loaded() {
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lsmod | grep -qs -w "^${MODULE_NAME}"
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}
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bluetooth_start() {
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if ! [ -e "/proc/device-tree/bluetooth/mac-address" ]; then
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log "[ERROR] Bluetooth mac-address not found"
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return
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fi
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# If module is already loaded, skip
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is_kernel_module_loaded && log "[ERROR] kernel module already present, skipping" && return 1
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power 0 && sleep 0.2 && power 1
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# Load manually the kernel module
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modprobe "${MODULE_NAME}"
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# Reconfigure the HCI interface with the expected MAC address and power levels
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is_kernel_module_loaded && set_btaddr && set_power_config && log "Bluetooth activated" && return 0
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log "[ERROR] Cannot initialize Bluetooth correctly" && return 1
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}
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is_system_running() {
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state=$(systemctl is-system-running 2>/dev/null)
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case "$state" in
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running|degraded)
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return 0 ;; # System is operational
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*)
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return 1 ;; # Assume not running
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esac
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}
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bluetooth_stop() {
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#
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# The btnxpuart driver hits a null pointer dereference on module
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# unloading when the interface is down. So as a workaround, make
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# sure the interface is UP before unloading the module.
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#
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if is_system_running; then
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hciconfig "${HCI_IFACE}" up && rmmod "${MODULE_NAME}"
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power 0
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else
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log "System rebooting... not taking any action"
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fi
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}
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case "$1" in
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start)
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bluetooth_start
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;;
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stop)
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bluetooth_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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