#20982: jffs2-error / nanostation M5 xw / r47658
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Reporter: bittorf@… | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone:
Component: packages | Version: Trunk
Resolution: | Keywords:
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Comment (by jmarlin):
https://wiki.openwrt.org/toh/ubiquiti/airmaxm notes the following:
Special Firmware Note: AirOS XM.v5.5.X images used U-Boot 1.1.4.2-s594
(Dec 5 2012 - 15:23:07). The OpenWRT image can be successfully flashed
onto these versions of firmware. However, in July 2015 Ubiquiti released a
new version of firmware XM.v5.6.X. With this firmware a new U-Boot version
was released, U-Boot 1.1.4.2-s956 (Jun 10 2015 - 10:54:50). The newer
U-Boot version changes the memory size and starting address for rootfs,
cfg, and EEPROM. LOADING AN OPENWRT IMAGE ON A U-Boot 1.1.4.2-s956 WILL
CAUSE THE DEVICE TO BE BRICKED!!!
If the device has XM.v5.6.X, an older version of XM firmware can be loaded
from the AirOS webgui (for example XM.v5.5.10) and U-Boot will be
overwritten with the older version. OpenWRT can then be loaded onto the
device successfully.
{{{
U-Boot 1.1.4.2-s594 (Dec 5 2012 - 15:23:07)
#: name size offset mask_flags
0: u-boot 0x00040000 0x00000000 0
1: u-boot-env 0x00010000 0x00040000 0
2: kernel 0x00100000 0x00050000 0
3: rootfs 0x00660000 0x00150000 0
4: cfg 0x00040000 0x007b0000 0
5: EEPROM 0x00010000 0x007f0000 0
U-Boot 1.1.4.2-s956 (Jun 10 2015 - 10:54:50)
#: name size offset mask_flags
0: u-boot 0x00040000 0x00000000 0
1: u-boot-env 0x00010000 0x00040000 0
2: kernel 0x00100000 0x00050000 0
3: rootfs 0x005a0000 0x00150000 0
4: cfg 0x00040000 0x006f0000 0
5: EEPROM 0x00010000 0x00730000 0
}}}
/quote
Note that these partitions listed on this wikipage are *not* what we
actually saw under 5.6.3 as mdeneen noted above.
However, the behavior is consistent with what the wiki notes - flashing
OpenWRT onto a 5.6.3 Airrouter is *not* successful, while flashing OpenWRT
onto a downgraded 5.5.10 Airrouter *is*.
Also note these mtdparts:
As defined in the the ar71xx Makefile:
{{{ ubntxm_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-
env)ro,1024k(kernel),6528k(rootfs),256k(cfg)ro,64k(EEPROM)ro,7552k@0x50000(firmware)
}}}
As seen in the serial console on a 5.6.3 AirOS platform:
{{{ mtdparts=mtdparts=ar7240-nor0:256k(u-boot),64k(u-boot-
env),1024k(kernel),5760k(rootfs),256k(cfg),64k(EEPROM) }}}
The new router firmware notes a rootfs size (5760k) which even doesn't
match what it reports in its own '/proc/mtd' (6528k). Also, changing the
rootfs size to 5760k in the ar71xx Makefile still doesn't allow us to
flash.
--
Ticket URL: <https://dev.openwrt.org/ticket/20982#comment:13>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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