120 lines
3.1 KiB
Bash
120 lines
3.1 KiB
Bash
#!/bin/sh
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#===============================================================================
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#
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# Copyright (C) 2012-2018 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 hardware
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#
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#===============================================================================
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# Bluetooth power GPIO
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BT_EN_QCA_GPIO_NR="gpio5 9"
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# set_gpio_value <gpio_nr> <value>
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set_gpio_value() {
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gpioset ${1}=${2}
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}
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# powercycle_gpio <gpio_nr>
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powercycle_gpio() {
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gpioset ${1}=0
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sleep .2
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gpioset ${1}=1
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sleep .2
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}
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error() {
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echo ${1}
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exit 1
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}
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bluetooth_init() {
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# Get MAC address from the device tree. Use a default value if it has not been set.
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BT_MACADDR="$(hexdump -ve '1/1 "%02X" ":"' /proc/device-tree/bluetooth/mac-address 2>/dev/null | sed 's/:$//g')"
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if [ -z "${BT_MACADDR}" ] || [ "${BT_MACADDR}" = "00:00:00:00:00:00" ]; then
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BT_MACADDR="00:04:F3:FF:FF:BB"
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fi
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# Module version older than revision 4 has swapped TX and RX lines
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MOD_VERSION="$(($(cat /proc/device-tree/digi,hwid,hv 2>/dev/null | tr -d '\0' || true)))"
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if [ "${MOD_VERSION}" -lt "4" ]; then
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# Ignore the CTS flow control
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BT_CTS_QCA_GPIO_NR="gpio1 18"
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set_gpio_value "${BT_CTS_QCA_GPIO_NR}" 0
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# Reduce the rate to avoid the need for HW flow control
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BT_RATE="115200"
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BT_RATE_CODE="00" # 115200 bps
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BT_FLOW="noflow"
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# Modify the baudrate in the firmware file
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BT_FW_FILE="/lib/firmware/qca/nvm_tlv_3.2.bin"
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if [ "$(hexdump -s 56 -n 1 -ve '1/1 "%.2x"' ${BT_FW_FILE})" != "${BT_RATE_CODE}" ]; then
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printf "\x${BT_RATE_CODE}" | dd of="${BT_FW_FILE}" bs=1 seek=56 count=1 conv=notrunc,fsync 2>/dev/null
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fi
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fi
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# Start the Bluetooth driver and bring up the interface
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HCIATTACH_LOG="/var/log/hciattach.log"
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for RETRY in $(seq 1 5)
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do
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killproc hciattach
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powercycle_gpio "${BT_EN_QCA_GPIO_NR}"
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if hciattach ttyBt qca ${BT_RATE:-3000000} -t30 ${BT_FLOW:-flow} unused ${BT_MACADDR} >${HCIATTACH_LOG} 2>&1; then
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# hciattach performs a reset to load the new firmware and needs some time to be ready
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sleep 1
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# Validate that FW was correcly loaded by checking if file exists
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if [ -f "/sys/kernel/debug/bluetooth/hci0/features" ]; then
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return
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fi
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fi
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sleep 1
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if [ $RETRY -ge 3 ]; then
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# Retry at default firmware baudrate
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BT_RATE="115200"
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fi
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done
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BT_ERROR="FAIL (hciattach)"
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}
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# Source function library
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. /etc/init.d/functions
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case "$1" in
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start)
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if [ -d "/proc/device-tree/bluetooth" ]; then
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if [ "$(tr -d '\0' 2>/dev/null </proc/device-tree/bluetooth/status)" != "disabled" ]; then
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echo -n "Starting bluetooth hardware: "
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bluetooth_init
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echo "${BT_ERROR:-done.}"
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fi
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fi
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;;
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stop)
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if [ -d "/sys/class/bluetooth/hci0" ]; then
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echo -n "Stopping bluetooth hardware: "
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killproc hciattach
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# Power down bluetooth
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set_gpio_value "${BT_EN_QCA_GPIO_NR}" 0
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echo "done."
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fi
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;;
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restart)
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$0 stop
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sleep 1
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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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