trustfence-initramfs: remove support for platforms with NAND internal storage

This initramfs only makes sense in platforms with an eMMC as the internal
storage, due to how the partition encryption support is implemented. In
plaatforms that use NAND instead, ths initramfs offers no functionality and
increases the recovery image size, so remove it.

https://onedigi.atlassian.net/browse/DEL-7534

Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>

meta-digi-dey/classes/trustfence.bbclass

@@ -99,7 +99,7 @@ python () {
         d.setVar("TRUSTFENCE_ENCRYPT_PARTITIONS", "1");
 
     # Enable the trustfence initramfs if and only if partition encryption is enabled
-    if (d.getVar("TRUSTFENCE_ENCRYPT_PARTITIONS", True) == "1"):
+    if (d.getVar("TRUSTFENCE_ENCRYPT_PARTITIONS", True) == "1" and d.getVar("STORAGE_MEDIA", True) == "mmc"):
         d.setVar("TRUSTFENCE_INITRAMFS_IMAGE", "dey-image-trustfence-initramfs");
     else:
         d.setVar("TRUSTFENCE_INITRAMFS_IMAGE", "");

meta-digi-dey/recipes-core/trustfence/trustfence-initramfs.bb

@@ -1,22 +1,15 @@
-# Copyright (C) 2016-2020 Digi International Inc.
+# Copyright (C) 2016-2021 Digi International Inc.
 
 SUMMARY = "Trustfence initramfs required files"
 LICENSE = "GPL-2.0"
 LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6"
 
-SRC_URI = " \
-    ${@bb.utils.contains('STORAGE_MEDIA', 'mmc', 'file://trustfence-initramfs-init_mmc', '', d)} \
-    ${@bb.utils.contains('STORAGE_MEDIA', 'mtd', 'file://trustfence-initramfs-init_mtd', '', d)} \
-"
+SRC_URI = "file://trustfence-initramfs-init"
 
 S = "${WORKDIR}"
 
 do_install() {
-	if [ "${STORAGE_MEDIA}" = "mmc" ]; then
-		install -m 0755 trustfence-initramfs-init_mmc ${D}/init
-	else
-		install -m 0755 trustfence-initramfs-init_mtd ${D}/init
-	fi
+	install -m 0755 trustfence-initramfs-init ${D}/init
 }
 
 # Do not create debug/devel packages
@@ -27,12 +20,11 @@ FILES_${PN} = "/"
 # Runtime packages used in 'trustfence-initramfs-init'
 RDEPENDS_${PN} = " \
     libubootenv-bin \
-    ${@bb.utils.contains('STORAGE_MEDIA', 'mmc', 'cryptsetup', '', d)} \
-    ${@bb.utils.contains('STORAGE_MEDIA', 'mtd', 'mtd-utils-ubifs', '', d)} \
+    cryptsetup \
     trustfence-tool \
     util-linux-findfs \
     wipe \
 "
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
-COMPATIBLE_MACHINE = "(ccimx6|ccimx6ul|ccimx8x|ccimx8m)"
+COMPATIBLE_MACHINE = "(ccimx6|ccimx8x|ccimx8m)"

meta-digi-dey/recipes-core/trustfence/trustfence-initramfs/trustfence-initramfs-init_mtd

@@ -1,60 +0,0 @@
-#!/bin/sh
-#===============================================================================
-#
-#  trustfence-initramfs-init
-#
-#  Copyright (C) 2016, 2017 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: Init script for Trustfence initramfs
-#
-#===============================================================================
-
-export PATH=/bin:/sbin:/usr/bin:/usr/sbin
-
-mkdir -p /proc /sys /dev
-mount -t proc proc /proc
-mount -t sysfs sysfs /sys
-mount -t devtmpfs devtmpfs /dev
-
-# Set kernel console loglevel
-LOGLEVEL="$(sysctl -n kernel.printk)"
-sysctl -q -w kernel.printk=4
-
-for arg in $(cat /proc/cmdline); do
-	case "${arg}" in
-		init=*|rescue=1|root=*) eval ${arg};;
-	esac
-done
-
-# Translate "PARTUUID=..." to real device
-root="/dev/$(findfs ${root})"
-
-# Jump to a rescue shell if requested
-if [ -n "${rescue}" ]; then
-	# Expand console and respawn if exited
-	while true; do
-		setsid cttyhack sh -l
-		sleep 1
-	done
-fi
-
-# Mount device
-mkdir -p /newroot
-mount -t "ubifs" ${root} /newroot
-
-#
-# Clean-up and do the switch_root to the final rootfs
-#
-# - restore previous kernel console loglevel
-# - umount virtual filesystems
-#
-[ -n "${LOGLEVEL}" ] && sysctl -q -w kernel.printk="${LOGLEVEL}"
-mount --move /dev /newroot/dev
-umount /sys /proc
-exec switch_root /newroot ${init:-/sbin/init}