Hi,
I have carambola Ralink 3050F target board and it has 8MB flash memory.

Here OpenWrt firmware image (openwrt-ramips-rt305x-carambola-squashfs-sysupgrade.bin) size resricted to 8MB.

I have gone through the link http://8devices.com/wiki_carambola/doku ... e_to_start
and able to download and build Carambola Software. Here i have built carambola source with version : v2.3-rc4

After this, i included many packages as per our requirement in OpenWrt menuconfig and able to build the OpenWrt firmware image (openwrt-ramips-rt305x-carambola-squashfs-sysupgrade.bin) with size 7.7 MB.

Now we included hardware support for 16MB flash memory in carambola.

So in order to generate OpenWrt firmware image size greater than 8 MB, i have gone through the link https://forum.openwrt.org/viewtopic.php?id=32512

As per this link i have done below changes

Edited the file carambola/tools/firmware-utils/src/mktplinkfw.c

changed from

static struct flash_layout layouts[] = {
{
.id = "4M",
.fw_max_len = 0x3c0000,
.kernel_la = 0x80060000,
.kernel_ep = 0x80060000,
.rootfs_ofs = 0x140000,
}, {
.id = "4Mlzma",
.fw_max_len = 0x3c0000,
.kernel_la = 0x80060000,
.kernel_ep = 0x80060000,
.rootfs_ofs = 0x100000,
}, {
.id = "8M",
.fw_max_len = 0x7c0000,
.kernel_la = 0x80060000,
.kernel_ep = 0x80060000,
.rootfs_ofs = 0x140000,
}, {
.id = "8Mlzma",
.fw_max_len = 0x7c0000,
.kernel_la = 0x80060000,
.kernel_ep = 0x80060000,
.rootfs_ofs = 0x100000,
}, {
/* terminating entry */
}
};

to

static struct flash_layout layouts[] = {
{
.id = "4M",
.fw_max_len = 0x3c0000,
.kernel_la = 0x80060000,
.kernel_ep = 0x80060000,
.rootfs_ofs = 0x140000,
}, {
.id = "4Mlzma",
.fw_max_len = 0x3c0000,
.kernel_la = 0x80060000,
.kernel_ep = 0x80060000,
.rootfs_ofs = 0x100000,
}, {
.id = "8M",
.fw_max_len = 0xfc0000,
.kernel_la = 0x80060000,
.kernel_ep = 0x80060000,
.rootfs_ofs = 0x140000,
}, {
.id = "8Mlzma",
.fw_max_len = 0xfc0000,
.kernel_la = 0x80060000,
.kernel_ep = 0x80060000,
.rootfs_ofs = 0x100000,
}, {
/* terminating entry */
}
};

Here i changed fw_max_len from 0x7c0000 to 0xfc0000 in the id 8M and 8Mlzma respectively.

and also edited the file carambola/target/linux/ramips/files/arch/mips/ralink/rt305x/mach-carambola.c

changed from

#define CARAMBOLA_ROOTFS_SIZE 0x690000 /* 6720KB

to

#define CARAMBOLA_ROOTFS_SIZE 0xe90000 /* 14912KB */


As i told earlier, i am able to build OpenWrt image with size 7.7 MB.
On the top of this, i have included more packages in OpenWrt menuconfig and started building OpenWrt firware using command : $ make V=s

After building firmware, OpenWrt fail to generate OpenWrt Firmware image (openwrt-ramips-rt305x-carambola-squashfs-sysupgrade.bin)

I would like to know

1) How to generate OpenWrt Firmware image (openwrt-ramips-rt305x-carambola-squashfs-sysupgrade.bin) size resricted to 16 MB but which has been restricted to 8MB currently ?

2) Whether any changes required in u-boot source code for supporting 16MB flash on Carambola

Please guide me on this.


Please find the attachment for mach-carambola.c and mktplinkfw.c files

Thanks,
Prashant N

Hi,
I am able to solve this problem i,e able to generate OpenWrt firmware image (openwrt-ramips-rt305x-carambola-squashfs-sysupgrade.bin) with size greater than 8MB and restricted to 15.6875MB.

Follow below steps

1) Edit the file carambola/target/linux/ramips/files/arch/mips/ralink/rt305x/mach-carambola.c

change from

#define CARAMBOLA_ROOTFS_SIZE 0x690000 /* 6720KB */

to

#define CARAMBOLA_ROOTFS_SIZE 0xe90000 /* 14912KB */

And also edit the file carambola/build_dir/linux-ramips_rt305x/linux-3.3.8/arch/mips/ralink/rt305x/mach-carambola.c


change from

#define CARAMBOLA_ROOTFS_SIZE 0x690000 /* 6720KB */

to

#define CARAMBOLA_ROOTFS_SIZE 0xe90000 /* 14912KB */

Also edit the file carambola/target/linux/ramips/image/Makefile

change from

define BuildFirmware/CARAMBOLA
$(call BuildFirmware/Generic,$(1),$(2),$(call mkcmdline,$(3),ttyS1,115200),1179648,6881280)

endef

to

define BuildFirmware/CARAMBOLA
$(call BuildFirmware/Generic,$(1),$(2),$(call mkcmdline,$(3),ttyS1,115200),1179648,15269888)
endef

Here we changed root file system size from 6881280 bytes (6720KB) to 15269888 bytes (14912KB)


2) select the packages from menuconfig
$ cd carambola
$ make menuconfig

Here choose many more packages so that image size will be greater than 8MB.

3) Build the firmware

$ make V=s

After completing build process, the new built OpenWrt firmware image (openwrt-ramips-rt305x-carambola-squashfs-sysupgrade.bin) with size greater than 8 MB will be
located in the path carambola/bin/ramips



Thanks,
Prashant N