bluez5-init: add Bluetooth init script for CCMP1x platforms

The HCI_UART Bluetooth driver does not support suspend-to-RAM operation, so the
driver must be loaded and unloaded manually. This commit adds support for the
Bluetooth initialization script used across Digi platforms, specifically for
ConnectCore MP13 and MP15.

https://onedigi.atlassian.net/browse/DEL-9650

Signed-off-by: Arturo Buzarra <arturo.buzarra@digi.com>

meta-digi-arm/conf/machine/ccmp13-dvk.conf

@@ -146,9 +146,6 @@ HAS_WIFI_VIRTWLANS = "true"
 # Set this platform without graphical support
 IS_HEADLESS = "true"
 
-# Remove additional bluetooth packages
-MACHINE_BLUETOOTH_EXTRA_INSTALL = ""
-
 # XBee
 XBEE_RESET_N_GPIO ?= "GPIOG@15"
 XBEE_TTY ?= "ttySTM2"

meta-digi-arm/conf/machine/ccmp15-dvk.conf

@@ -159,9 +159,6 @@ MKUBIFS_ARGS ?= "-m 2048 -e 126976 -c 8191"
 # Wireless external module
 HAS_WIFI_VIRTWLANS = "true"
 
-# Remove additional bluetooth packages
-MACHINE_BLUETOOTH_EXTRA_INSTALL = ""
-
 # XBee
 XBEE_RESET_N_GPIO ?= "GPIOZ@2"
 XBEE_TTY ?= "ttySTM2"

meta-digi-arm/recipes-kernel/linux/linux-dey_6.6.bb

@@ -46,6 +46,10 @@ do_compile:append:stm32mpcommon() {
     fi
 }
 
+# Blacklist hci_uart module. It will be managed by the bluetooth-init script
+KERNEL_MODULE_PROBECONF:ccmp1 += "hci_uart"
+module_conf_hci_uart:ccmp1 = "blacklist hci_uart"
+
 do_install:append:stm32mpcommon() {
     if ${@bb.utils.contains('MACHINE_FEATURES','gpu','true','false',d)}; then
         # when ACCEPT_EULA are filled

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

@@ -1,4 +1,4 @@
-# Copyright (C) 2022-2024, Digi International Inc.
+# Copyright (C) 2022-2025, Digi International Inc.
 
 SUMMARY = "Bluetooth init scripts"
 LICENSE = "GPL-2.0-only"
@@ -60,7 +60,9 @@ RDEPENDS:${PN} = "initscripts-functions"
 
 # IW61x Bluetooth support requires the WiFi FW support
 RDEPENDS:${PN}:append:ccimx9 = " firmware-nxp-wifi-nxpiw612-sdio"
-RDEPENDS:${PN}:append:ccmp25 = " firmware-murata-infineon"
+# Murata - Infineon combo chip requires both WiFi and Bluetooth firmware
+RDEPENDS:${PN}:append:ccmp1 = " firmware-murata-infineon"
+RDEPENDS:${PN}:append:ccmp2 = " firmware-murata-infineon"
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
-COMPATIBLE_MACHINE = "(ccimx6$|ccimx6ul|ccimx8m|ccimx8x|ccimx9|ccmp25)"
+COMPATIBLE_MACHINE = "(ccimx6$|ccimx6ul|ccimx8m|ccimx8x|ccimx9|ccmp1|ccmp2)"

meta-digi-dey/recipes-connectivity/bluez/bluez5-init/ccmp1/bluetooth-init

@@ -0,0 +1,93 @@
+#!/bin/sh
+#===============================================================================
+#
+#  Copyright (C) 2025 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 interface
+#
+#===============================================================================
+
+SCRIPTNAME="$(basename ${0})"
+RETRIES=3
+HCI_IFACE="hci0"
+MODULE_NAME="hci_uart"
+
+if grep -qs '\<digi,ccmp13\>' /proc/device-tree/compatible; then
+	# CCMP13 - BT_REG_EN - GPIO PD13
+	GPIO_CHIP="GPIOD"
+	GPIO_NUMBER="13"
+else
+	# CCMP15 - BT_REG_EN - GPIO PZ6
+	GPIO_CHIP="GPIOZ"
+	GPIO_NUMBER="6"
+fi
+
+log() {
+	if type "systemd-cat" >/dev/null 2>/dev/null; then
+		systemd-cat -p "${1}" -t "${SCRIPTNAME}" printf "%s" "${2}"
+	else
+		logger -p "${1}" -t "${SCRIPTNAME}" "${2}"
+	fi
+}
+
+bt_power() {
+	gpioset "${GPIO_CHIP}" "${GPIO_NUMBER}"="${1}"
+}
+
+is_kernel_module_loaded() {
+	lsmod | grep -qs -w "^${MODULE_NAME}"
+}
+
+bt_init() {
+	# If module is already loaded, skip
+	is_kernel_module_loaded && log info "kernel module already present, skipping" && return 1
+
+	for i in $(seq ${RETRIES}); do
+		# Perform a power cycle
+		bt_power 0
+		sleep 0.5
+		bt_power 1
+
+		# Load manually the kernel module
+		modprobe "${MODULE_NAME}"
+		sleep 1
+		is_kernel_module_loaded && log info "Bluetooth activated" && return 0
+
+		log err "Cannot initialize Bluetooth, retrying..."
+	done
+
+	log err "Failed to initialize Bluetooth interface"
+	return 1
+}
+
+bt_stop() {
+	hciconfig ${HCI_IFACE} down
+	# Unload HCI driver instance
+	rmmod hci_uart
+	rmmod btbcm
+	# Disable Bluetooth chip
+	bt_power 0 && log info "Bluetooth disabled" && return 0
+}
+
+case "$1" in
+	start)
+		bt_init
+		;;
+	stop)
+		bt_stop
+		;;
+	restart)
+		$0 stop
+		$0 start
+		;;
+	*)
+		echo "Usage: $0 {start|stop|restart}"
+		exit 1
+		;;
+esac