feat(coreos-emmc-flasher): beaglebone support

This introduce a new coreos-emmc-flasher-beaglebone
recipe that create a SWU file that can be used to
create the partition in the internal emmc of a beaglebone
and flash both u-boot and efibootguard.

Support for create efibootguard configuration partition
and flashing kernel and rootfs is not included.

layers/meta-belden-coreos-bsp/conf/machine/beaglebone.conf

@@ -5,6 +5,7 @@
 MACHINE_EXTRA_RRECOMMENDS = "kernel-modules kernel-devicetree"
 EXTRA_IMAGEDEPENDS += "virtual/bootloader"
 
+
 DEFAULTTUNE ?= "cortexa8hf-neon"
 include conf/machine/include/arm/armv7a/tune-cortexa8.inc
 
@@ -66,3 +67,4 @@ COREOS_PLATFORM1_ROOT ?= "/dev/mmcblk0p4"
 
 require conf/machine/include/coreos-generic-features/efi.inc
 require conf/machine/include/coreos-generic-features/legacy-mbr-disk.inc
+require conf/machine/include/coreos-generic-features/emmc.inc

layers/meta-belden-coreos-bsp/conf/machine/include/coreos-generic-features/emmc.inc

@@ -0,0 +1,7 @@
+# This configuration file should be included for all hardware that has an
+# integrated emmc
+
+MACHINE_FEATURES += "emmc"
+
+# Generate a SWU image to flash the emmc
+do_image[depends] += "coreos-emmc-flasher-${MACHINE}:do_swuimage"

layers/meta-belden-coreos-bsp/recipes-bsp/coreos-emmc-flasher/coreos-emmc-flasher-beaglebone.bb

@@ -0,0 +1,6 @@
+COMPATIBLE_MACHINE = "beaglebone"
+
+require coreos-emmc-flasher.inc
+require coreos-emmc-flasher-uboot.inc
+
+SWUPDATE_IMAGES += "MLO"

layers/meta-belden-coreos-bsp/recipes-bsp/coreos-emmc-flasher/coreos-emmc-flasher-beaglebone/sw-description

@@ -0,0 +1,48 @@
+software =
+{
+    version = "@@DISTRO_VERSION@@";
+    @@MACHINE@@ = {
+        hardware-compatibility: ["1.0"];
+        factory = {
+            emmc = {
+                partitions: (
+                    {
+                        type = "diskpart";
+                        device = "/dev/mmcblk1";
+                        properties: {
+                                labeltype = "dos";
+                                partition-1 = [ "size=32M", "start=133120", "name=efi", "type=0xef", "fstype=fat16"];
+                        };
+                    }
+                );
+                images: (
+                    {
+                        filename = "MLO";
+                        device = "/dev/mmcblk1";
+                        offset = "128K";
+                        sha256 = "$swupdate_get_sha256(MLO)";
+                    },
+                    {
+                        filename = "u-boot-beaglebone.img";
+                        device = "/dev/mmcblk1";
+                        offset = "384K";
+                        sha256 = "$swupdate_get_sha256(u-boot-beaglebone.img)";
+
+                    }
+                );
+                files: (
+                    {
+                        filename = "efibootguardarm.efi";
+                        path = "/EFI/BOOT/bootarm.efi";
+                        device = "/dev/mmcblk1p1";
+                        filesystem = "vfat";
+                        sha256 = "$swupdate_get_sha256(efibootguardarm.efi)";
+                        properties: {
+                            create-destination = "true";
+                        }
+                    }
+                );
+            }
+        }
+    }
+}

layers/meta-belden-coreos-bsp/recipes-bsp/coreos-emmc-flasher/coreos-emmc-flasher-uboot.inc

@@ -0,0 +1,10 @@
+# Machine that use u-boot can include this file after
+# coreo-swupdate-flasher.inc
+
+# Add support to flash u-boot
+IMAGE_DEPENDS += "virtual/bootloader"
+
+UBOOT_SUFFIX ??= "img"
+SWUPDATE_IMAGES += "u-boot"
+SWUPDATE_IMAGES_FSTYPES[u-boot] = ".${UBOOT_SUFFIX}"
+

layers/meta-belden-coreos-bsp/recipes-bsp/coreos-emmc-flasher/coreos-emmc-flasher.inc

@@ -0,0 +1,31 @@
+
+DESCRIPTION = "SWU Image generation to flash the internal emmc"
+SECTION = "bootloaders"
+LICENSE = "CLOSED"
+PR = "r1"
+
+SRC_URI = " \
+    file://sw-description \
+    "
+
+# efibootguard
+# ==============================================================================
+# efibootguard support is not machine depends so it can be done here
+
+require conf/image-uefi.conf
+
+# The efibootguard binary has to be embedded into the image. swupdate will check
+# that the binary exist
+IMAGE_DEPENDS += "efibootguard"
+SWUPDATE_IMAGES += "efibootguard${EFI_ARCH}"
+
+# Override or variable are not supported in var[flag] statement, but having more
+# flags than necessary doesn't do any arm
+SWUPDATE_IMAGES_FSTYPES[efibootguardx64] = ".efi"
+SWUPDATE_IMAGES_FSTYPES[efibootguardaa64] = ".efi"
+SWUPDATE_IMAGES_FSTYPES[efibootguardarm] = ".efi"
+
+# Image generated should be named coreos-swupdater-flasher-${MACHINE}
+# and not the default coreos-swupdate-flasher-${MACHINE}-${MACHINE}
+IMAGE_BASENAME ?= "coreos-emmc-flasher"
+inherit swupdate

layers/meta-belden-coreos/recipes-support/swupdate/swupdate/0001-fs-add-support-to-create-FAT16-partition.patch

@@ -0,0 +1,50 @@
+From 323c7fdda60758506dea9da6c477e42a0dbe86ca Mon Sep 17 00:00:00 2001
+From: Samuel Dolt <samuel.dolt@netmodule.com>
+Date: Wed, 22 Feb 2023 13:22:27 +0100
+Subject: [PATCH] fs: add support to create FAT16 partition
+
+Currently swupdate can create vfat partition using an embedded
+copy of the fat_fs library. The partition created by fat_fs is
+can be any FAT format (12/16/32) based on the partition size.
+
+As the partition created by fat_fs was not readable by U-Boot,
+this commit add a new "fat16" filesystem type that use the
+external binary mkfs.fat to always create FAT16 partition.
+---
+ fs/diskformat.c | 16 ++++++++++++++++
+ 1 file changed, 16 insertions(+)
+
+diff --git a/fs/diskformat.c b/fs/diskformat.c
+index 8d58fc3..f98c9d7 100644
+--- a/fs/diskformat.c
++++ b/fs/diskformat.c
+@@ -19,6 +19,21 @@ static inline int ext_mkfs_short(const char *device_name, const char *fstype)
+ }
+ #endif
+ 
++int fat_mkfs_extern(const char *device_name, const char *fstype)
++{
++	char cmd[100] = "mkfs.fat -F ";
++	if(strcmp(fstype, "fat16") == 0){
++		strcat(cmd, "16 ");
++	} else {
++		ERROR("fat_mkfs_extern: unsupported fstype %s", fstype);
++		return -1;
++	}
++	strncat(cmd, device_name, sizeof(cmd) - strlen(cmd) - 1);
++
++	TRACE("fat_mkfs_extern: running %s", cmd);
++	return system(cmd);
++}
++
+ struct supported_filesystems {
+ 	const char *fstype;
+ 	int (*mkfs)(const char *device_name, const char *fstype);
+@@ -28,6 +43,7 @@ static struct supported_filesystems fs[] = {
+ #if defined(CONFIG_FAT_FILESYSTEM)
+ 	{"vfat", fat_mkfs},
+ #endif
++	{"fat16", fat_mkfs_extern},
+ #if defined(CONFIG_EXT_FILESYSTEM)
+ 	{"ext2", ext_mkfs_short},
+ 	{"ext3", ext_mkfs_short},

layers/meta-belden-coreos/recipes-support/swupdate/swupdate/defconfig

@@ -20,3 +20,7 @@ CONFIG_SYSTEMD=y
 CONFIG_UPDATE_STATE_CHOICE_BOOTLOADER=y
 CONFIG_UPDATE_STATE_BOOTLOADER="ustate"
 CONFIG_LIBCONFIG=y
+CONFIG_DISKPART=y
+CONFIG_DISKPART_FORMAT=y
+CONFIG_FAT_FILESYSTEM=y
+CONFIG_EXT_FILESYSTEM=y

layers/meta-belden-coreos/recipes-support/swupdate/swupdate/sw-collections-config.sh

@@ -37,3 +37,6 @@ case $ROOT_PARTLABEL in
         exit 1
         ;;
 esac
+
+# Allow to use image that flash the emmc
+SWUPDATE_ARGS="${SWUPDATE_ARGS} -e factory,emmc"

layers/meta-belden-coreos/recipes-support/swupdate/swupdate_2022.12.bbappend

@@ -3,20 +3,26 @@
 FILESEXTRAPATHS:prepend := "${THISDIR}/swupdate:"
 RDEPENDS:${PN}:append = " efibootguard"
 
-SRC_URI += " \
+SRC_URI += "file://webserver-config.sh \
-    file://webserver-config.sh \
+            file://sw-collections-config.sh \
-    file://sw-collections-config.sh \
+            file://0001-fs-add-support-to-create-FAT16-partition.patch \
-"
+            "
+
+# 0001-fs-add-support-to-create-FAT16-partition.patch depends on the
+# mkfs.fat binary
+RDEPENDS:${PN} += "dosfstools"
+
+# Don't use /www as the web root
 wwwdir = "/usr/share/swupdate-www"
 
 FILES:${PN} += " \
     ${SWUPDATE_SW_VERSIONS_FILE} \
     ${SWUPDATE_HW_COMPATIBILITY_FILE} \
+    ${libdir}/swupdate/conf.d/sw-collections-config.sh \
 "
 
 FILES:${PN}-www += " \
     ${libdir}/swupdate/conf.d/webserver-config.sh \
-    ${libdir}/swupdate/conf.d/sw-collections-config.sh \
 "
 
 do_install:append() {
@@ -25,4 +31,6 @@ do_install:append() {
 
     install -m 755 ${WORKDIR}/sw-collections-config.sh ${D}${libdir}/swupdate/conf.d/
     echo "${MACHINE} 1.0" > ${D}${SWUPDATE_HW_COMPATIBILITY_FILE}
-}
+}
+
+PR = "r1"