[brcm2708] adds target used by rapsberry pi

Add support for Raspberry Pi / brcm2708 / 2835

Signed-off-by: Ian Ridge <ianridge [at] gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32825 3c298f89-4303-0410-b956-a3cf2f4a3e73

4 files changed, 81 insertions, 0 deletions

diff --git a/target/linux/brcm2708/image/Config.in b/target/linux/brcm2708/image/Config.in
new file mode 100644
index 000000000..b9bea8647
--- /dev/null
+++ b/target/linux/brcm2708/image/Config.in
@@ -0,0 +1,5 @@
+config BRCM2708_SD_BOOT_PARTSIZE
+	int "Boot (SD Card) filesystem partition size (in MB)"
+	depends TARGET_brcm2708
+	default 20
+
diff --git a/target/linux/brcm2708/image/Makefile b/target/linux/brcm2708/image/Makefile
new file mode 100644
index 000000000..a8dbef1b8
--- /dev/null
+++ b/target/linux/brcm2708/image/Makefile
@@ -0,0 +1,46 @@
+# 
+# Copyright (C) 2012 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/image.mk
+include $(INCLUDE_DIR)/host.mk
+
+define Image/Prepare
+	cp $(LINUX_DIR)/arch/arm/boot/Image $(KDIR)/Image
+endef
+
+FAT32_BLOCK_SIZE=1024
+FAT32_BLOCKS=$(shell echo $$(($(CONFIG_BRCM2708_SD_BOOT_PARTSIZE)*1024*1024/$(FAT32_BLOCK_SIZE))))
+
+define Image/Build/RaspberryPi
+	rm -f $(KDIR)/boot.img
+
+	mkdosfs $(KDIR)/boot.img -C $(FAT32_BLOCKS)
+	# Raspberry Pi has no bootloader, instead the GPU loads and starts the kernel
+	mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/arm128_start.elf ::
+	mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/arm192_start.elf ::
+	mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/arm224_start.elf ::
+	mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/bootcode.bin ::
+	mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/COPYING.linux ::
+	mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/LICENCE.broadcom ::
+	mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/loader.bin ::
+	mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/arm$(2)_start.elf ::start.elf  #Copy file for memory/gpu division
+	mcopy -i $(KDIR)/boot.img cmdline.txt ::
+	mcopy -i $(KDIR)/boot.img $(KDIR)/Image ::kernel.img  # Copy OpenWrt built kernel
+	./gen_rpi_sdcard_img.sh $(BIN_DIR)/$(IMG_PREFIX)-sdcard-vfat-$(1)_$(2).img $(KDIR)/boot.img $(KDIR)/root.$(1) \
+		$(CONFIG_BRCM2708_SD_BOOT_PARTSIZE) $(CONFIG_TARGET_ROOTFS_PARTSIZE)
+endef
+
+define Image/Build
+	$(CP) $(KDIR)/root.$(1) $(BIN_DIR)/$(IMG_PREFIX)-$(1).img
+	$(CP) $(KDIR)/Image $(BIN_DIR)/$(IMG_PREFIX)-Image
+
+	$(call Image/Build/RaspberryPi,$(1),128)
+	$(call Image/Build/RaspberryPi,$(1),192)
+	$(call Image/Build/RaspberryPi,$(1),224)
+endef
+
+$(eval $(call BuildImage))
diff --git a/target/linux/brcm2708/image/cmdline.txt b/target/linux/brcm2708/image/cmdline.txt
new file mode 100644
index 000000000..516f2706b
--- /dev/null
+++ b/target/linux/brcm2708/image/cmdline.txt
@@ -0,0 +1 @@
+dwc_otg.lpm_enable=0 rpitestmode=1 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait
diff --git a/target/linux/brcm2708/image/gen_rpi_sdcard_img.sh b/target/linux/brcm2708/image/gen_rpi_sdcard_img.sh
new file mode 100755
index 000000000..c3287d28d
--- /dev/null
+++ b/target/linux/brcm2708/image/gen_rpi_sdcard_img.sh
@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+set -x 
+[ $# == 5 ] || {
+    echo "SYNTAX: $0 <file> <bootfs image> <rootfs image> <bootfs size> <rootfs size>"
+    exit 1
+}
+
+OUTPUT="$1"
+BOOTFS="$2"
+ROOTFS="$3"
+BOOTFSSIZE="$4"
+ROOTFSSIZE="$5"
+
+head=4
+sect=63
+
+set `ptgen -o $OUTPUT -h $head -s $sect -t c -p ${BOOTFSSIZE}M -t 83 -p ${ROOTFSSIZE}M`
+
+BOOTOFFSET="$(($1 / 512))"
+BOOTSIZE="$(($2 / 512))"
+ROOTFSOFFSET="$(($3 / 512))"
+ROOTFSSIZE="$(($4 / 512))"
+
+dd bs=512 if="$BOOTFS" of="$OUTPUT" seek="$BOOTOFFSET" conv=notrunc
+dd bs=512 if="$ROOTFS" of="$OUTPUT" seek="$ROOTFSOFFSET" conv=notrunc
+
+
+