mvebu: new subtarget cortex A53

This commit introduces new subtarget for Marvell EBU Armada Cortex A53
processor based devices.

The first device is Globalscale ESPRESSObin. Some hardware specs:

SoC: Marvell Armada 3700LP (88F3720) dual core ARM Cortex A53
     processor up to 1.2GHz
RAM: 512MB, 1GB or 2GB DDR3
Storage: SATA interface
         µSD card slot with footprint for an optional 4GB EMMC
         4MB SPI NOR flash for bootloader
Ethernet: Topaz Networking Switch (88E6341) with 3x GbE ports
Connectors: USB 3.0
            USB 2.0
            µUSB port connected to PL2303SA (USB to serial bridge
            controller) for UART access
Expansion: 2x 46-pin GPIO headers for accessories and shields with
           I2C, GPIOs, PWM, UART, SPI, MMC, etc
           MiniPCIe slot
Misc: Reset button, JTAG interface

Currently booting only from µSD card is supported.
The boards depending on date of dispatch can come with various U-Boot
versions. For the newest version 2017.03-armada-17.10 no manual
intervention should be needed to boot OpenWrt image. For the older ones
it's necessary to modify default U-Boot environment:

 1. Interrupt boot process to run U-Boot command line,

 2. Run following commands:
    (for version 2017.03-armada-17.06 and 2017.03-armada-17.08)
     setenv bootcmd "load mmc 0:1 0x4d00000 boot.scr; source 0x4d00000"
     saveenv

    (for version 2015.01-armada-17.02 and 2015.01-armada-17.04)
     setenv bootargs "console=ttyMV0,115200 root=/dev/mmcblk0p2 rw rootwait"
     setenv bootcmd "ext4load mmc 0:1 ${fdt_addr} armada-3720-espressobin.dtb; ext4load mmc 0:1 ${kernel_addr} Image; booti ${kernel_addr} - ${fdt_addr}"
     saveenv

 3. Poweroff, insert SD card with OpenWrt image, boot and enjoy.

Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>

3 files changed, 50 insertions, 2 deletions

diff --git a/target/linux/mvebu/image/Makefile b/target/linux/mvebu/image/Makefile
index 6e012a6..55e1a0b 100644
--- a/target/linux/mvebu/image/Makefile
+++ b/target/linux/mvebu/image/Makefile
@@ -27,17 +27,28 @@ endef
 
 define Build/boot-scr
 	rm -f $@-boot.scr
-	mkimage -A arm -O linux -T script -C none -a 0 -e 0 -d $(DEVICE_NAME).bootscript $@-boot.scr
+	sed -e 's#@ROOT@#$(SIGNATURE)#g' \
+		$(DEVICE_NAME).bootscript > $@-new.bootscript
+	mkimage -A arm -O linux -T script -C none -a 0 -e 0 -d $@-new.bootscript $@-boot.scr
 endef
 
 define Build/boot-img
 	rm -f $@.boot
 	mkfs.fat -C $@.boot 16384
 	$(foreach dts,$(DEVICE_DTS), mcopy -i $@.boot $(DTS_DIR)/$(dts).dtb ::$(dts).dtb;)
-	mcopy -i $@.boot $(IMAGE_KERNEL) ::zImage
+	mcopy -i $@.boot $(IMAGE_KERNEL) ::$(KERNEL_NAME)
 	-mcopy -i $@.boot $@-boot.scr ::boot.scr
 endef
 
+define Build/boot-img-ext4
+	rm -fR $@.boot
+	mkdir -p $@.boot
+	$(foreach dts,$(DEVICE_DTS), $(CP) $(DTS_DIR)/$(dts).dtb $@.boot;)
+	$(CP) $(IMAGE_KERNEL) $@.boot/$(KERNEL_NAME)
+	-$(CP) $@-boot.scr $@.boot/boot.scr
+	make_ext4fs -J -l 16384K $@.bootimg $@.boot
+endef
+
 define Build/sdcard-img
 	if [ -n "$(UBOOT)" ]; then UBOOT="$(STAGING_DIR_IMAGE)/$(UBOOT)"; fi; \
 	ROOTFS_SIZE=$$(( $(CONFIG_TARGET_ROOTFS_PARTSIZE) * 1024 * 2 )); \
@@ -48,6 +59,16 @@ define Build/sdcard-img
 		83 $$ROOTFS_SIZE $(IMAGE_ROOTFS)
 endef
 
+define Build/sdcard-img-ext4
+	if [ -n "$(UBOOT)" ]; then UBOOT="$(STAGING_DIR_IMAGE)/$(UBOOT)"; fi; \
+	ROOTFS_SIZE=$$(( $(CONFIG_TARGET_ROOTFS_PARTSIZE) * 1024 * 2 )); \
+	SIGNATURE="$(SIGNATURE)" \
+	./gen_mvebu_sdcard_img.sh $@ \
+		$$UBOOT \
+		83 32768 $@.bootimg \
+		83 $$ROOTFS_SIZE $(IMAGE_ROOTFS)
+endef
+
 define Build/omnia-medkit-initramfs
 	$(TAR) -c -T /dev/null -f $@
 	rm -rf $(dir $(IMAGE_KERNEL))boot
@@ -101,5 +122,6 @@ define Device/NAND-512K
 endef
 
 include cortex-a9.mk
+include cortex-a53.mk
 
 $(eval $(call BuildImage))
diff --git a/target/linux/mvebu/image/cortex-a53.mk b/target/linux/mvebu/image/cortex-a53.mk
new file mode 100644
index 0000000..711d2c0
--- /dev/null
+++ b/target/linux/mvebu/image/cortex-a53.mk
@@ -0,0 +1,16 @@
+ifeq ($(SUBTARGET),cortexa53)
+
+define Device/globalscale-espressobin
+  KERNEL_NAME := Image
+  KERNEL := kernel-bin
+  DEVICE_TITLE := ESPRESSObin (Marvell Armada 3700 Community Board)
+  DEVICE_PACKAGES := e2fsprogs ethtool mkf2fs kmod-fs-vfat kmod-usb2 kmod-usb3 kmod-usb-storage
+  IMAGES := sdcard.img.gz
+  IMAGE/sdcard.img.gz := boot-scr | boot-img-ext4 | sdcard-img-ext4 | gzip | append-metadata
+  DEVICE_DTS := armada-3720-espressobin
+  DTS_DIR := $(DTS_DIR)/marvell
+  SUPPORTED_DEVICES := globalscale,espressobin
+endef
+TARGET_DEVICES += globalscale-espressobin
+
+endif
diff --git a/target/linux/mvebu/image/globalscale-espressobin.bootscript b/target/linux/mvebu/image/globalscale-espressobin.bootscript
new file mode 100644
index 0000000..0d03ac8
--- /dev/null
+++ b/target/linux/mvebu/image/globalscale-espressobin.bootscript
@@ -0,0 +1,10 @@
+setenv bootargs "root=PARTUUID=@ROOT@-02 rw rootwait"
+
+if test -n "${console}"; then
+	setenv bootargs "${bootargs} ${console}"
+fi
+
+load mmc 0:1 ${fdt_addr} armada-3720-espressobin.dtb
+load mmc 0:1 ${kernel_addr} Image
+
+booti ${kernel_addr} - ${fdt_addr}