mvebu: add support for Buffalo LinkStation LS220DE

The Buffalo LinkStation LS220DE is a dual bay NAS, based on Marvell
Armada 370

Hardware:
   SoC:         Marvell Armada 88F6707
   CPU:         Cortex-A9 800 MHz, 1 core
   Flash 1:     SPI-NOR 1 MiB (U-Boot)
   Flash 2:     NAND 512 MiB (OS)
   RAM:         DDR3 256 MiB
   Ethernet:    1x 1GbE
   USB:         1x 2.0
   SATA:        2x 3Gb/s
   LEDs/Input:  5x / 2x (1x button, 1x slide-switch)
   Fan:         1x casing

Flash instructions, from hard drive:
  1. Get access to the "boot" partition at the hard drive where the stock
     firmware is installed. It can be done with acp-commander or by
     plugging the hard drive to a computer.
  2. Backup the stock uImage:
         mv /boot/uImage.buffalo /boot/uImage.buffalo.bak
  3. Move and rename the Openwrt initramfs image to the boot partition:
         mv openwrt-initramfs-kernel.bin /boot/uImage.buffalo
  4. Power on the Linkstation with the hardrive inside. Now Openwrt will
     boot, but still not installed.
  5. Connect via ssh to OpenWrt:
         ssh root@192.168.1.1
  6. Rename boot files inside boot partition
         mount -t ext3 /dev/sda1 /mnt
         mv /mnt/uImage.buffalo /mnt/uImage.buffalo.openwrt.bak
         mv /mnt/initrd.buffalo /mnt/initrd.buffalo.bak
  7. Format ubi partitions at the NAND flash ("kernel_ubi" and "ubi"):
         ubiformat /dev/mtd0 -y
         ubidetach -p /dev/mtd1
         ubiformat /dev/mtd1 -y
  8. Flash the sysupgrade image:
         sysupgrade -n openwrt-squashfs-sysupgrade.bin
  9. Wait until it finish, the device will reboot with OpenWrt installed
     on the NAND flash.

Restore the stock firmware:
  1. Take the hard drive used for the installation and restore boot backup
     files to their original names:
         mount -t ext3 /dev/sda1 /mnt
         mv /mnt/uImage.buffalo.bak /mnt/uImage.buffalo
         mv /mnt/initrd.buffalo.bak /mnt/initrd.buffalo
  2. Boot from the hard drive and perform a stock firmware update using
     the Buffalo utility. The NAND will be restored to the original
     state.

Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>

2 files changed, 25 insertions, 0 deletions

diff --git a/target/linux/mvebu/image/Makefile b/target/linux/mvebu/image/Makefile
index b0498d34c9..57129d2dcb 100644
--- a/target/linux/mvebu/image/Makefile
+++ b/target/linux/mvebu/image/Makefile
@@ -53,6 +53,16 @@ define Build/buffalo-kernel-jffs2
 	rm -rf $(KDIR)/kernel_jffs2 $@.fakerd
 endef
 
+define Build/buffalo-kernel-ubifs
+	rm -rf $@-ubidir
+	mkdir -p $@-ubidir
+	mv $@ $@-ubidir/uImage.buffalo
+	touch $@
+	$(call Build/append-uImage-fakehdr, ramdisk)
+	mv $@ $@-ubidir/initrd.buffalo
+	$(STAGING_DIR_HOST)/bin/mkfs.ubifs $(KERNEL_UBIFS_OPTS) -r $@-ubidir $@
+endef
+
 # Some info about Ctera firmware:
 # 1. It's simple tar file (GNU standard), but it must have ".firm" suffix.
 # 2. It contains two images: kernel and romdisk. Both are required.
diff --git a/target/linux/mvebu/image/cortexa9.mk b/target/linux/mvebu/image/cortexa9.mk
index aed1d47646..56381ab5f8 100644
--- a/target/linux/mvebu/image/cortexa9.mk
+++ b/target/linux/mvebu/image/cortexa9.mk
@@ -14,6 +14,21 @@ define Device/kernel-size-migration
 	Upgrade via sysupgrade mechanism is not possible, so new installation via factory style image is required.
 endef
 
+define Device/buffalo_ls220de
+  $(Device/NAND-128K)
+  DEVICE_VENDOR := Buffalo
+  DEVICE_MODEL := LinkStation LS220DE
+  KERNEL_UBIFS_OPTS = -m $$(PAGESIZE) -e 124KiB -c 172 -x none
+  KERNEL := kernel-bin | append-dtb | uImage none | buffalo-kernel-ubifs
+  KERNEL_INITRAMFS := kernel-bin | append-dtb | uImage none
+  DEVICE_DTS := armada-370-buffalo-ls220de
+  DEVICE_PACKAGES :=  \
+    kmod-hwmon-gpiofan kmod-hwmon-drivetemp kmod-linkstation-poweroff \
+    kmod-md-mod kmod-md-raid0 kmod-md-raid1 kmod-md-raid10 kmod-fs-xfs \
+    mdadm mkf2fs e2fsprogs partx-utils
+endef
+TARGET_DEVICES += buffalo_ls220de
+
 define Device/buffalo_ls421de
   $(Device/NAND-128K)
   DEVICE_VENDOR := Buffalo