ccimx93: iw612: add bluetooth support

The bluetooth FW for the IW612 is loaded together with WiFi FW, so there
is not BT FW file as in our other products.
In order to use the BT, it is a requirement to load the WiFi FW, so
ensure that the service is started after the load of the system
modules.

https://onedigi.atlassian.net/browse/DEL-8346

Signed-off-by: Isaac Hermida <isaac.hermida@digi.com>

meta-digi-dey/recipes-connectivity/bluez/bluez5-init.bb

@@ -1,4 +1,4 @@
-# Copyright (C) 2022, Digi International Inc.
+# Copyright (C) 2022-2023, Digi International Inc.
 
 SUMMARY = "Bluetooth init scripts"
 LICENSE = "GPL-2.0-only"
@@ -58,5 +58,8 @@ SYSTEMD_SERVICE:${PN} = "bluetooth-init.service"
 # 'bluetooth-init' script uses '/etc/init.d/functions'
 RDEPENDS:${PN} = "initscripts-functions"
 
+# IW61x Bluetooth support requires the WiFi FW support
+RDEPENDS:${PN}:append:ccimx93 = " firmware-nxp-wifi-nxpiw612"
+
 PACKAGE_ARCH = "${MACHINE_ARCH}"
-COMPATIBLE_MACHINE = "(ccimx6$|ccimx6ul|ccimx8x|ccimx8mn|ccimx8mm)"
+COMPATIBLE_MACHINE = "(ccimx6$|ccimx6ul|ccimx8x|ccimx8mn|ccimx8mm|ccimx93)"

meta-digi-dey/recipes-connectivity/bluez/bluez5-init/ccimx93/bluetooth-init

@@ -0,0 +1,70 @@
+#!/bin/sh
+#===============================================================================
+#
+#  Copyright (C) 2023 by Digi International Inc.
+#  All rights reserved.
+#
+#  This program is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU General Public License version 2 as published by
+#  the Free Software Foundation.
+#
+#
+#  !Description: Initialize bluetooth hardware
+#
+#===============================================================================
+
+HCI_IFACE="hci0"
+
+log() {
+	printf "<3>iw612-bluetooth: %s\n" "${1}" >/dev/kmsg
+}
+
+bluetooth_start() {
+	if ! [ -e "/proc/device-tree/bluetooth/mac-address" ]; then
+		log "[ERROR] Bluetooth mac-address not found"
+		return
+	fi
+
+	BTADDR=$(hexdump -ve '1/1 "%02X" ":"' /proc/device-tree/bluetooth/mac-address 2>/dev/null | sed 's/:$//g')
+	hciattach -t5 /dev/ttyBt any 115200 flow nosleep "${BTADDR}" && \
+	hciconfig ${HCI_IFACE} up && \
+	sleep 0.2 && \
+	hcitool -i ${HCI_IFACE} cmd 0x3f 0x0009 0xc0 0xc6 0x2d 0x00 && \
+	sleep 0.2 && \
+	killall hciattach && \
+	sleep 0.2 && \
+	hciattach -t5 /dev/ttyBt any -s 3000000 3000000 flow && \
+	log "Bluetooth activated" && return
+
+	log "[ERROR] Cannot initialize Bluetooth"
+	return 1
+}
+
+bluetooth_stop() {
+	if [ -e "/sys/class/bluetooth/${HCI_IFACE}" ]; then
+		# hci reset command
+		hcitool -i ${HCI_IFACE} cmd 0x03 0x0003
+		sleep 0.2
+		# set baudrate to 115200
+		hcitool -i ${HCI_IFACE} cmd 0x3f 0x0009 0x00 0xc2 0x01 0x00
+		killall hciattach
+	fi
+}
+
+case "$1" in
+	start)
+		bluetooth_start
+		;;
+	stop)
+		bluetooth_stop
+		;;
+	restart)
+		$0 stop
+		sleep 1
+		$0 start
+		;;
+	*)
+		echo "Usage: $0 {start|stop|restart}"
+		exit 1
+		;;
+esac

meta-digi-dey/recipes-connectivity/bluez/bluez5-init/ccimx93/bluetooth-init.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Initialization of the IW612 bluetooth chip
+ConditionPathIsDirectory=/proc/device-tree/bluetooth
+Before=bluetooth.service
+After=systemd-modules-load.service
+
+[Service]
+Type=forking
+ExecStart=/etc/bluetooth-init start
+ExecStop=/etc/bluetooth-init stop
+
+[Install]
+WantedBy=bluetooth.service