bcm4908: build flashable & bootable firmware images

BCM4908 bootloader requires firmware with JFFS2 image containing:
1. cferam.000
2. 94908.dtb
3. vmlinux.lz
4. device custom files

cferam.000 can be obtained from the bcm63xx-cfe repository.
device custom files are stored in images dir.

Signed-off-by: Rafał Miłecki <[email protected]>

target/linux/bcm4908/image/Makefile

@@ -13,6 +13,19 @@ define Build/bcm4908kernel
 	mv [email protected] $@
 endef
 
+define Build/bcm4908img
+	rm -fr $@-bootfs
+	mkdir -p $@-bootfs
+	cp -r $(DEVICE_NAME)/* $@-bootfs/
+	touch $@-bootfs/1-dummy
+	cp $(DTS_DIR)/$(firstword $(DEVICE_DTS)).dtb $@-bootfs/94908.dtb
+	cp $(KDIR)/bcm63xx-cfe/$(subst _,$(comma),$(DEVICE_NAME))/cferam.000 $@-bootfs/
+	cp $(IMAGE_KERNEL) $@-bootfs/vmlinux.lz
+
+	$(STAGING_DIR_HOST)/bin/mkfs.jffs2 --pad --little-endian --squash-uids -v -e 128KiB -o [email protected] -d $@-bootfs -m none -n
+	$(STAGING_DIR_HOST)/bin/bcm4908img create $@ -f [email protected]
+endef
+
 define Device/Default
   KERNEL := kernel-bin | bcm4908lzma | bcm4908kernel
   KERNEL_DEPENDS = $$(wildcard $(DTS_DIR)/$$(DEVICE_DTS).dts)
@@ -30,6 +43,7 @@ define Device/asus_gt-ac5300
   DEVICE_MODEL := GT-AC5300
   DEVICE_DTS := broadcom/bcm4908/bcm4908-asus-gt-ac5300
   IMAGES := bin
+  IMAGE/bin := bcm4908img
 endef
 TARGET_DEVICES += asus_gt-ac5300
 
@@ -38,6 +52,7 @@ define Device/netgear_r8000p
   DEVICE_MODEL := R8000P
   DEVICE_DTS := broadcom/bcm4908/bcm4906-netgear-r8000p
   IMAGES := bin
+  IMAGE/bin := bcm4908img
 endef
 TARGET_DEVICES += netgear_r8000p
 

target/linux/bcm4908/image/asus_gt-ac5300/rom/etc/image_ident

@@ -0,0 +1,2 @@
+@(#) $imageversion: HND1731918 $
+@(#) $imageversion: HND1731918 $

target/linux/bcm4908/image/asus_gt-ac5300/rom/etc/image_version

@@ -0,0 +1 @@
+HND1731918

target/linux/bcm4908/image/netgear_r8000p/etc/image_ident

@@ -0,0 +1,4 @@
+@(#) $imageversion: 5024HNDrc11R8000P2602103 $
+@(#) $imageversion: 5024HNDrc11R8000P2602103 $
+@(#) $changelist: Changelist: REL_502HND04rc11_BISON04T_REL_7_14_170_34Revision:   765096 $
+@(#) $changelist: Changelist: REL_502HND04rc11_BISON04T_REL_7_14_170_34Revision:   765096 $

target/linux/bcm4908/image/netgear_r8000p/etc/image_version

@@ -0,0 +1 @@
+5024HNDrc11R8000P2602103