[OpenWrt-Devel] [PATCH v2] ramips: build factory images for Netgear EX2700

[Joseph C. Lehner]

This patch adds support for building factory and sysupgrade images
for the Netgear EX2700 that don't require modification of u-boot
environment variables.

The bootloader on this device expects the kernel partition to end
on a 64k block boundary. The last 64 byte of the kernel partition
must contain a valid uImage header - in the stock firmware, this is
the uImage header of the root filesystem. For this patch, we're using
the uImage header of a 0 byte partition (ex2700-fakeroot.uImage).

Signed-off-by: Joseph C. Lehner <joseph.c.lehner at gmail.com>

---

diff --git a/target/linux/ramips/image/Makefile b/target/linux/ramips/image/Makefile
index a42f8b9..3ce4d91 100644
--- a/target/linux/ramips/image/Makefile
+++ b/target/linux/ramips/image/Makefile
@@ -912,8 +912,37 @@ endif
 # MT7620A Profiles
 #

+# $(1): (ignored)
+# $(2): Board name (small caps)
+# $(3): DTS file name without extension
+# $(4): Erase block size
+# $(5): DNI hardware id
+# $(6): Maximum image size
+define BuildFirmware/Netgear/squashfs
+   $(call PatchKernelLzmaDtb,$(2),$(3))
+   $(eval kernelsize=$(shell wc -c < $(KDIR)/vmlinux-$(2).bin.lzma))
+   # Round (kernelsize + 2*64) to erase blocks, avoiding parens
+   $(eval kernelsize=$(shell expr 2 \* 64 + $(kernelsize)))
+   $(eval kernelsize=$(shell expr 1 + $(kernelsize) / $(4)))
+   $(eval kernelsize=$(shell expr $(4) \* $(kernelsize)))
+   dd if=$(KDIR)/vmlinux-$(2).bin.lzma \
+       of=$(KDIR)/vmlinux-$(2).bin.lzma.tmp \
+       bs=$$$$(($(kernelsize)-2*64)) count=1 conv=sync
+   $(call MkImage,lzma,$(KDIR)/vmlinux-$(2).bin.lzma.tmp,$(KDIR)/vmlinux-$(2).uImage)
+
+   cat ex2700-fakeroot.uImage >> $(KDIR)/vmlinux-$(2).uImage
+
+   $(call MkImageSysupgrade/squashfs,squashfs,$(2),$(6))
+
+   $(STAGING_DIR_HOST)/bin/mkdniimg \
+       -B $(3) -H $(5) -v OpenWrt \
+       -i $(call imgname,squashfs,$(2))-sysupgrade.bin \
+       -o $(call imgname,squashfs,$(2))-factory.bin
+endef
+
 Image/Build/Profile/E1700=$(call BuildFirmware/UMedia/$(1),$(1),e1700,E1700,0x013326)
-Image/Build/Profile/EX2700=$(call BuildFirmware/Default4M/$(1),$(1),ex2700,EX2700)
+ex2700_mtd_size=3604480
+Image/Build/Profile/EX2700=$(call
BuildFirmware/Netgear/$(1),$(1),ex2700,EX2700,65536,29764623+4+0+32+2x2+0,$(ex2700_mtd_size))
 Image/Build/Profile/MT7620a=$(call BuildFirmware/Default8M/$(1),$(1),mt7620a,MT7620a)
 Image/Build/Profile/MT7620a_MT7610e=$(call
BuildFirmware/Default8M/$(1),$(1),mt7620a_mt7610e,MT7620a_MT7610e)
 Image/Build/Profile/MT7620a_MT7530=$(call
BuildFirmware/Default8M/$(1),$(1),mt7620a_mt7530,MT7620a_MT7530)
diff --git a/target/linux/ramips/image/ex2700-fakeroot.uImage
b/target/linux/ramips/image/ex2700-fakeroot.uImage
new file mode 100644
index 0000000000000000000000000000000000000000..340f736141e84e425fe66b372eef80b217146df5
GIT binary patch
literal 64
ocmY#ql?+qLV?W4%1+cQRGx!&z=7krPD5NE3rxxYsm!K;H01lrBPXGV_

literal 0
HcmV?d00001

--
2.5.0
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