[OpenWrt-Devel] adding tp-link wr740n v5.0 support

[Daniel Petre]

On 06/07/2015 04:38 AM, Daniel Petre wrote:
> Hello,
> so i just got the v5.0 version of tp-link wr740n and it seems its not a
> 2 mb flash and 16 mb ram chinese version like stated in the wiki.

Just got replied by local tp-link (Romania) rep with confirmation that
the european version of v5.0 has 4 MB of flash and 32 MB of ram and I
updated the wiki aswell:

http://wiki.openwrt.org/toh/tp-link/tl-wr740n?&#supported_versions

I guess i could open it up and solder serial on it if no one wants or
has time to hint me about the modifications of v4.x openwrt patches for
v5.0 but i would preffer to keep the warranty intact for a while..

> 
> Took a look at the download page for the firmware at www.tp-link.ro and
> the firmware looks like a 4 mb flash variant. Here is binwalk of it:
> 
> [dani at x220 Downloads]$ binwalk
> wr740nv5_wr741ndv5_en_3_16_9_up_boot\(150312\).bin
> 
> DECIMAL       HEXADECIMAL     DESCRIPTION
> --------------------------------------------------------------------------------
> 4             0x4             TP-Link firmware header, firmware version:
> 3.16.9, image version: "ver. 1.0", product ID: 0x7400005, product
> version: 1, kernel load address: 0x80002000, kernel entry point:
> 0x801D74B0, kernel offset: 512, kernel length: 895122, rootfs offset:
> 1048576, rootfs length: 2883584, bootloader offset: 0, bootloader
> length: 48518
> 14224         0x3790          U-Boot version string, "U-Boot 1.1.4 (Mar
> 12 2015 - 16:40:24)"
> 15568         0x3CD0          uImage header, header size: 64 bytes,
> header CRC: 0xA334F831, created: Thu Mar 12 10:40:25 2015, image size:
> 33398 bytes, Data Address: 0x80010000, Entry Point: 0x80010000, data
> CRC: 0xC9CFC8E6, OS: Linux, CPU: MIPS, image type: Firmware Image,
> compression type: lzma, image name: "u-boot image"
> 15632         0x3D10          LZMA compressed data, properties: 0x5D,
> dictionary size: 33554432 bytes, uncompressed size: 95708 bytes
> 131588        0x20204         TP-Link firmware header, firmware version:
> 3.16.9, image version: "ver. 1.0", product ID: 0x7400005, product
> version: 1, kernel load address: 0x80002000, kernel entry point:
> 0x801D74B0, kernel offset: 512, kernel length: 895122, rootfs offset:
> 1048576, rootfs length: 2883584, bootloader offset: 0, bootloader length: 0
> 132096        0x20400         LZMA compressed data, properties: 0x5D,
> dictionary size: 33554432 bytes, uncompressed size: 2589532 bytes
> 1180160       0x120200        Squashfs filesystem, little endian,
> version 4.0, compression:lzma, size: 2344073 bytes,  566 inodes,
> blocksize: 131072 bytes, created: Thu Mar 12 10:48:34 2015
> 
> uncompressing the root shows the following 2.6.31 specific atheros
> kernel modules: ag7240_mod.ko, ath_rate_atheros.ko
> 
> My question to the list is: would i manage to produce a valid firmware
> if i just replicate the patches from
> https://dev.openwrt.org/attachment/ticket/10492/tl-wr740n-v4.support.final.patch
> but with v5 related details added?
> 
> Thanks!
> 
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