Flashing custom image to WP7607

#1

Hi There ,
I customised the linux for wp7607 by disabling few services and compiled or built the yocto image and after flashing the new image i am getting following log in my wp7607

UBI device number 0, total 120 LEBs (30474240 bytes, 29.1 MiB), available 6 LEBs (1523712 bytes, 1.5 MiB), LEB size 253952 bytes (248.0 KiB)
rootfs: dev ‘/dev/ubi0_0’ 'ubifs’
[ 1.585553] UBIFS error (ubi0:0 pid 182): mount_ubifs: cannot mount read-write - read-only media
[ 1.594350] UBIFS error (ubi0:0 pid 182): ubifs_leb_read: reading 4096 bytes from LEB 0:0 failed, error -22
rootfs: mount failed
It is not dual system logic
System error!
[ 1.621076] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000100
**[ 1.621076] **
[ 1.629212] CPU: 0 PID: 1 Comm: init Not tainted 3.18.44 #2
[ 1.634754] [] (unwind_backtrace) from [] (show_stack+0x10/0x14)
[ 1.642463] [] (show_stack) from [] (panic+0x90/0x1f4)
[ 1.649322] [] (panic) from [] (do_exit+0x40c/0x8ac)
[ 1.656000] [] (do_exit) from [] (SyS_exit_group+0x0/0x10)
[ 1.663203] [] (SyS_exit_group) from [<00000004>] (0x4)
[ 2.673122] cpr_panic_callback: apc_corner: [corner:7, fuse_corner:3] = 1225000 uV

ima: setting up IMA subsystem…
ima: feature not supported
The proc node does not exist
mount root fs from partition (rootfs|system)
Non-secure.
UBI device number 0, total 120 LEBs (30474240 bytes, 29.1 MiB), available 6 LEBs (1523712 bytes, 1.5 MiB), LEB size 253952 bytes (248.0 KiB)
rootfs: dev ‘/dev/ubi0_0’ 'ubifs’
[ 1.923076] UBIFS error (ubi0:0 pid 182): mount_ubifs: cannot mount read-write - read-only media
[ 1.941039] UBIFS error (ubi0:0 pid 182): ubifs_leb_read: reading 4096 bytes from LEB 0:0 failed, error -22
rootfs: mount failed
It is not dual system logic
System error!
[ 1.980221] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000100
**[ 1.980221] **
[ 1.988362] CPU: 0 PID: 1 Comm: init Not tainted 3.18.44 #2
[ 1.993901] [] (unwind_backtrace) from [] (show_stack+0x10/0x14)
[ 2.001607] [] (show_stack) from [] (panic+0x90/0x1f4)
[ 2.008465] [] (panic) from [] (do_exit+0x40c/0x8ac)
[ 2.015148] [] (do_exit) from [] (SyS_exit_group+0x0/0x10)
[ 2.022354] [] (SyS_exit_group) from [<00000004>] (0x4)
[ 3.034377] cpr_panic_callback: apc_corner: [corner:7, fuse_corner:3] = 1225000 uV
[ 3.041029] Rebooting in 5 seconds…
[ 8.073978] Going down for restart now
[ 8.077490] reboot: trigger wdog bite
[ 8.080507] Causing a watchdog bite!
Also it says kernel panic . on the other end if i try to recover the image i have following error
**swiflash -m wp76xx -i WP76xx_Release10.1_GENERIC\ (1).spk **
Detecting USB of the target
No device connected
I am able to see only one ttyUSB instead of three and with lsusb i have this
Bus 002 Device 064: ID 1199:68c0 Sierra Wireless, Inc.

It will be great if somebody helps me in recovering the image back to generic .

Thanks & Regards

  • Akshay Kulkarni
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#2

Hello @akshaykulkarniak,

If you see the Sierra deivce(Bus 002 Device 064: ID 1199:68c0 Sierra Wireless, Inc.) using the lsusb command, Then swiflash -m wp76xx -i WP76xx_Release10.1_GENERIC.spk should work. Not sure why it is not working.

Please try using the below command which resets the device and check whether it works,
swiflash -m wp76xx -r

Still if it is not working, Please try with windows fdt tool to recover your WP7607.
In the below link you can find the details on fdt tool download and usage.
https://source.sierrawireless.com/resources/airprime/software/fdt/

Regards,
Muralidhara N.

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