Flashing generic FW image on EM7455

[ex0ns]

Hello

I'm trying to use this shell script to update my modem, but something is strange and I can't understand what exactly, also, so you know where I could download older firmware ?

After running the script, the modem would not start (I can see the qcserial in dmesg and connect to ttyUSB2 to run AT command:

 AT!gobiimpref?


preferred fw version:    02.08.02.00
 preferred carrier name:  GENERIC
 preferred config name:   GENERIC_002.007_000
 preferred subpri index:  000
 current fw version:      02.33.03.00
 current carrier name:    GENERIC
 current config name:     GENERIC_002.007_000
 current subpri index:    000

 fw version mismatch




at!image?
TYPE SLOT STATUS LRU FAILURES UNIQUE_ID   BUILD_ID
FW   1    EMPTY  0   0 0                  
FW   2    EMPTY  0   0 0                  
FW   3    EMPTY  0   0 0                  
FW   4    EMPTY  0   0 0                  
Max FW images: 4
Active FW image is at slot 255

TYPE SLOT STATUS LRU FAILURES UNIQUE_ID   BUILD_ID
PRI  FF   GOOD   0   0 0      002.072_001 02.33.03

And if I run a command using qmicli:

firmware preference successfully retrieved:
[image 0]
Image type: 'modem'
Unique ID:  '002.007_000'
Build ID:   '02.08.02.00_GENERIC'
[image 1]
Image type: 'pri'
Unique ID:  '002.007_000'
Build ID:   '02.08.02.00_GENERIC'

This is really strange, all the slots for FW images are empty (it says that the active slot is at 255), the current and prefered fw version do not match, during the script, I was able to spot those two errors after the successfull flashing of the firmware:

AT!ENTERCND="A710"
OK
AT!IMPREF="GENERIC"
ERROR
AT!GOBIIMPREF="GENERIC"
ERROR

I don't know what to do, I wanted to flash 02.08.02.00 again, but I can't find it anywhere, could you please help me ?
This seems really close to #93

[ex0ns]

It seems to be a timing issue when flasing the device, I ran the following step manually, while monitoring the devices in dmesg (waiting for it to change its state from "normal" and "reset"). Please note that the VID/PID changes between the two commands:

qmi-firmware-update --reset -d "1199:9079"
read # check the dmesg log
qmi-firmware-update --update-download -d "1199:9078" "$SWI9X30C_CWE" "$SWI9X30C_NVU"

And this worked fine, so I don't know what happened during the previous flashes attempts, but I would bet on a timing issue.

Thank you for the amazing script/reference btw