Major refactor in SDCard generation

The generation of SDCard has been completely refactored to work out of
box; now to use it you have to set, e.g:

SDCARD_ROOTFS = "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ext3"
SDCARD_SIZE = "128"
IMAGE_TYPES += "ext3 sdcard"

Now the sdcard has following layout:

 0  - 1M                  - reserved to bootloader and other data
 1M - BOOT_SPACE          - kernel
 BOOT_SPACE - SDCARD_SIZE - rootfs

All current supported machines on BSP will work out of box and
generate a 2GB SDCard with an ext3 rootfs on it.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

2 files changed, 76 insertions, 55 deletions

diff --git a/classes/image_types_fsl.bbclass b/classes/image_types_fsl.bbclass
new file mode 100644
index 0000000..3ae0b17
--- /dev/null
+++ b/classes/image_types_fsl.bbclass
@@ -0,0 +1,76 @@
+inherit image_types
+
+IMAGE_BOOTLOADER ?= "u-boot"
+
+# Handle u-boot suffixes
+UBOOT_SUFFIX ?= "bin"
+
+#
+# Create an image that can by written onto a SD card using dd.
+#
+# External variables needed:
+#   ${SDCARD_ROOTFS}    - the rootfs image to incorporate
+#   ${IMAGE_BOOTLOADER} - bootloader to use {u-boot, barebox}x
+#
+# The disk layout used is:
+#
+#    0  - 1M                  - reserved to bootloader and other data
+#    1M - BOOT_SPACE          - kernel
+#    BOOT_SPACE - SDCARD_SIZE - rootfs
+#
+
+# Default to 3.4GiB images
+SDCARD_SIZE ?= "3400"
+
+# Boot partition volume id
+BOOTDD_VOLUME_ID ?= "Boot ${MACHINE}"
+
+# Addional space for boot partition
+BOOT_SPACE ?= "5M"
+
+IMAGE_DEPENDS_sdcard = "parted-native dosfstools-native mtools-native \
+                        virtual/kernel ${IMAGE_BOOTLOADER}"
+
+IMAGE_CMD_sdcard () {
+        if [ -z "${SDCARD_ROOTFS}" ]; then
+                bberror "SDCARD_ROOTFS is undefined. To use sdcard image from Freescale's BSP it needs to be defined."
+                exit 1
+        fi
+
+        TMP=${WORKDIR}/tmp
+        SDCARD=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.sdcard
+
+        dd if=/dev/zero of=${SDCARD} bs=$(expr 1000 \* 1000) count=${SDCARD_SIZE}
+
+        # Create partition table
+        parted -s ${SDCARD} mklabel msdos
+        parted -s ${SDCARD} mkpart primary 0 1M
+        parted -s ${SDCARD} mkpart primary 1M ${BOOT_SPACE}
+        parted -s ${SDCARD} mkpart primary ${BOOT_SPACE} 100%
+        parted ${SDCARD} print
+
+        case "${IMAGE_BOOTLOADER}" in
+                u-boot)
+                dd if=${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.${UBOOT_SUFFIX} of=${SDCARD} conv=notrunc seek=2 bs=512
+                ;;
+                barebox)
+                dd if=${DEPLOY_DIR_IMAGE}/barebox-${MACHINE}.bin of=${SDCARD} conv=notrunc seek=1 skip=1 bs=512
+                dd if=${DEPLOY_DIR_IMAGE}/bareboxenv-${MACHINE}.bin of=${SDCARD} conv=notrunc seek=1 bs=512k
+                ;;
+                *)
+                bberror "Unkown IMAGE_BOOTLOADER value"
+                exit 1
+                ;;
+        esac
+
+        BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDCARD} unit b print \
+                          | awk '/ 2 / { print substr($3, 1, length($3 -1)) / 512 }')
+        mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
+        mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/uImage-${MACHINE}.bin ::/uImage
+
+        dd if=${WORKDIR}/boot.img of=${SDCARD} conv=notrunc seek=1 bs=1M
+        dd if=${SDCARD_ROOTFS} of=${SDCARD} conv=notrunc seek=1 bs=${BOOT_SPACE}
+
+        cd ${DEPLOY_DIR_IMAGE}
+        ln -sf ${IMAGE_NAME}.sdcard ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.sdcard
+}
diff --git a/classes/sdcard_image.bbclass b/classes/sdcard_image.bbclass
deleted file mode 100644
index 96f7080..0000000
--- a/classes/sdcard_image.bbclass
+++ /dev/null
@@ -1,55 +0,0 @@
-#
-# Create an image that can by written onto a SD card using dd.
-#
-# External variables needed:
-#   ${ROOTFS} - the rootfs image to incorporate
-#   ${IMAGE_BOOTLOADER} - bootloader to use {u-boot, barebox}x
-
-inherit image
-
-IMAGE_BOOTLOADER ?= "u-boot"
-
-do_rootfs[depends] += "parted-native:do_populate_sysroot \
-                       virtual/kernel:do_deploy \
-                       ${IMAGE_BOOTLOADER}:do_deploy"
-
-# Add the fstypes we need
-IMAGE_FSTYPES += "sdimg"
-
-# Default to 3.4GiB images
-SDIMG_SIZE ?= "3400"
-
-# Addional space for boot partition
-BOOT_SPACE ?= "10M"
-
-IMAGE_CMD_sdimg () {
-        TMP=${WORKDIR}/tmp
-        SDIMG=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.sdimg
-
-        dd if=/dev/zero of=${SDIMG} bs=$(expr 1000 \* 1000) count=${SDIMG_SIZE}
-
-        # Create partition table
-        parted -s ${SDIMG} mklabel msdos
-        parted -s ${SDIMG} mkpart primary ${BOOT_SPACE} 100%
-        parted ${SDIMG} print
-
-        case "${IMAGE_BOOTLOADER}" in
-                u-boot)
-                dd if=${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.bin of=${SDIMG} conv=notrunc seek=1 skip=1 bs=512
-                dd if=${DEPLOY_DIR_IMAGE}/uImage-${MACHINE}.bin of=${SDIMG} conv=notrunc seek=1 bs=1M
-                ;;
-                barebox)
-                dd if=${DEPLOY_DIR_IMAGE}/barebox-${MACHINE}.bin of=${SDIMG} conv=notrunc seek=1 skip=1 bs=512
-                dd if=${DEPLOY_DIR_IMAGE}/bareboxenv-${MACHINE}.bin of=${SDIMG} conv=notrunc seek=1 bs=512k
-                ;;
-                *)
-                bberror "Unkown IMAGE_BOOTLOADER value"
-                exit 1
-                ;;
-        esac
-
-        dd if=${ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=${BOOT_SPACE}
-
-        cd ${DEPLOY_DIR_IMAGE}
-        ln -sf ${IMAGE_NAME}.sdimg ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.sdimg
-}