How to add adef device for WP76 UART2

Legato Application Framework
1

Hi,

My app doesn’t start anymore, since I recently updated my WP76 form Sierra Firmware R9 towards R12.
I discovered that R12 uses a different ttyHS device for the UARTs: UART2 now uses ttyHS1 iso ttyHSL1.
(see WP76 UART2 uses different tty device since Firmware R12 - IoT Modules - Sierra Wireless Forum)

Can I add something to my application sources (.adef file?), so, that it can be compatible for both R9 and R12 firmware?

requires:
{
device:
{
[rw] /dev/ttyHS0 /dev/ttyHS0
[rw] /dev/ttyHSL1 /dev/ttyHSL1 // /dev/ttyHS1 for firmware R12
}
}

Greetings,

annaertd

2

in R12, you can run the following command to create a link to /dev/ttyHS1.

ln /dev/ttyHS1 /dev/ttyHSL1

3

What do you mean with ‘command’?
Can I use ‘in’ in the SSH terminal, or, should I put it in a script file?

I expected a run-time check on the Linux version, at startup, so, that my app can decide which tty device is needed.

4

you can use use “ln” in both ssh terminal or script file.

5

On 4 chips WP76 reset using “swiflash -m WP76XX -i reset.cwe”,
UART2 is not enumerated equally:

  • ttyHSL1 on 2 of them as expected,
  • ttyHS1 on the 2 other.

A release upgrade does not fix the problem: the good/bad enumartion remains (R12, R16).

dmesg just says that the uart device is already used when trying to assign ttyHSL1 passed on the kernel command line.

Why ?

How to fix that (using a ln command for instance) before app startup?

--------- TRACES ----------
— ttyHSL1 NOK on WP76 running R12 —

root@swi-mdm9x28-wp:~# fwupdate query
Connecting to service …
Firmware Version: SWI9X07Y_02.25.02.01 000000 jenkins 2019/01/30 08:13:05
Bootloader Version: SWI9X07Y_02.25.02.01 000000 jenkins 2019/01/30 08:13:05
Linux Version: 3.18.122 #2 PREEMPT Wed Aug 11 07:49:22 UTC 2021
root@swi-mdm9x28-wp:~# uname -a
Linux swi-mdm9x28-wp 3.18.122 #2 PREEMPT Wed Aug 11 07:49:22 UTC 2021 armv7l GNU/Linux
root@swi-mdm9x28-wp:~# legato version
18.10.3_0b50331a9f4d0ecc0fd816c2a1300436
root@swi-mdm9x28-wp:~# cat /sys/devices/platform/msm_serial_hs*/config
APP
APP
DISABLED
DISABLED
root@swi-mdm9x28-wp:~#

– and after swiflash -m WP76XX -i Generic_R16 –
— ttyHSL1 NOK on WP76 running R16 —

root@swi-mdm9x28-wp:~# legato version
19.11.2_4ad011d85a76309438be40fc19e7153a
root@swi-mdm9x28-wp:~# fwupdate query
Connecting to service …
Firmware Version: SWI9X07Y_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14
Bootloader Version: SWI9X07Y_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14
Linux Version: 3.18.140 #1 PREEMPT Tue Aug 3 08:17:34 UTC 2021
root@swi-mdm9x28-wp:~# uname -a
Linux swi-mdm9x28-wp 3.18.140 #1 PREEMPT Tue Aug 3 08:17:34 UTC 2021 armv7l GNU/Linux
root@swi-mdm9x28-wp:~# ll /dev/ttyHS*
crw-rw---- 1 root dialout 248, 0 Jan 1 1970 /dev/ttyHS0
crw–w---- 1 root root 248, 1 Jan 1 1970 /dev/ttyHS1
root@swi-mdm9x28-wp:~# cat /sys/devices/platform/msm_serial_hs*/config
APP
APP
DISABLED
DISABLED

— ttyHSL1 OK on WP76 running R16 (another chip) —
root@swi-mdm9x28-wp:~# fwupdate query
Connecting to service …
Firmware Version: SWI9X07Y_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14
Bootloader Version: SWI9X07Y_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14
Linux Version: 3.18.140 #1 PREEMPT Tue Aug 3 08:17:34 UTC 2021
root@swi-mdm9x28-wp:~# legato version
19.11.2_4ad011d85a76309438be40fc19e7153a
root@swi-mdm9x28-wp:~# uname -a
Linux swi-mdm9x28-wp 3.18.140 #1 PREEMPT Tue Aug 3 08:17:34 UTC 2021 armv7l GNU/Linux
root@swi-mdm9x28-wp:~# ll /sys/devices/platform/msm_serial_hs*
lrwxrwxrwx 1 root root 0 Jan 6 00:10 /sys/devices/platform/msm_serial_hs.0 → …/78b0000.uart
lrwxrwxrwx 1 root root 0 Jan 6 00:10 /sys/devices/platform/msm_serial_hs.1 → …/78af000.uart
lrwxrwxrwx 1 root root 0 Jan 6 00:12 /sys/devices/platform/msm_serial_hsl.0 → …/78b0000.serial
lrwxrwxrwx 1 root root 0 Jan 6 00:10 /sys/devices/platform/msm_serial_hsl.1 → …/78af000.serial
root@swi-mdm9x28-wp:~# cat /sys/devices/platform/msm_serial_hs*/config
AT
UNAVAILABLE
DISABLED
CONSOLE
root@swi-mdm9x28-wp:~# ll /dev/ttyHS*
crw-rw---- 1 root dialout 248, 0 Jan 1 1970 /dev/ttyHS0
crw–w---- 1 root root 247, 1 Jan 6 00:10 /dev/ttyHSL1

6

Did you compare the at!mapuart? In these four modules while in same firmware?

7

Problem solved: ttyHS1 instead of ttyHSL1 in releases >= R12.

Just to be sure, I did again a downgrade R12, reset WP76, upgrade R16, and finally update app (using ttyHS1), and all 4 modules were OK.
I can’t figure out how I came to have R16 running with ttyHSL1 (this was my dev module). An overlay masking R10 maybe ???

Tnahks anyway jyijyi.

8

Hello,
The problem fired again.
when the modules come from the factory they are

/dev/ttyHSL1 - AT DISABLED CONSOLE - !MAPUART: 1,16
Linux swi-mdm9x28-wp 3.18.44 #2 PREEMPT Thu Sep 20 16:20:02 UTC 2018 armv7l GNU/Linux
18.06.3_dc55d84226223a3798b01c1a272e9603
Firmware Version: SWI9X07Y_02.18.05.00 000000 jenkins 2018/07/19 17:40:21
Bootloader Version: SWI9X07Y_02.18.05.00 000000 jenkins 2018/07/19 17:40:21
Linux Version: 3.18.44 #2 PREEMPT Thu Sep 20 16:20:02 UTC 2018

I have a script that reflash them automatically: R12 + reset + R16 + update

after that process, most modules are in ttyHS1

/dev/ttyHS1 - APP APP DISABLED DISABLED  - !MAPUART: 17,17
Firmware Version: SWI9X07Y_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14
Bootloader Version: SWI9X07Y_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14
Linux Version: 3.18.140 #1 PREEMPT Tue Aug 3 08:17:34 UTC 2021

BUT some modules stay in ttyHSL1:
/dev/ttyHSL1 - AT UNAVAILABLE DISABLED CONSOLE - !MAPUART: 1,16
Linux swi-mdm9x28-wp 3.18.140 #1 PREEMPT Tue Aug 3 08:17:34 UTC 2021 armv7l GNU/Linux
19.11.2_dbd1716614d095b4e250418340ae1afa

a reboot or BOR doesn’t fix the problem

a full reflash R12…R16…update however fixes the problem…

What am I wrong ?

How can we still have ttyHSL1 with R16 ???

Thanks

9

ttyHS1 is for module setting to 17 for UART2 where most of your modules are having !MAPUART: 17,17

ttyHSL1 is for module setting to 16 for UART2 where some of your problematic modules are having !MAPUART: 1,16

so probably your problematic modules are not setting the AT!MAPUART properly.