qmicli / Sierra EM7455

[Sebastian Sjoholm]

Hi,

I seem to have issues with the Sierra Wireless EM7455 and qmicli, it seems that I get problems already in the start of the communication, and it does not really matter what I send to the modem, it will fail with the same error as below:

root at x046:~# qmicli -d /dev/cdc-wdm0  --dms-get-model -v
[09 Mar 2016, 20:09:05] [Debug] [/dev/cdc-wdm0] Opening device with flags 'none'...
[09 Mar 2016, 20:09:05] [Debug] QMI Device at '/dev/cdc-wdm0' ready
[09 Mar 2016, 20:09:05] [Debug] [/dev/cdc-wdm0] Assuming service 'dms' is supported...
[09 Mar 2016, 20:09:05] [Debug] [/dev/cdc-wdm0] Allocating new client ID...
[09 Mar 2016, 20:09:05] [Debug] [/dev/cdc-wdm0] Sent message...
<<<<<< RAW:
<<<<<<   length = 16
<<<<<<   data   = 01:0F:00:00:00:00:00:01:22:00:04:00:01:01:00:02

[09 Mar 2016, 20:09:05] [Debug] [/dev/cdc-wdm0] Sent message (translated)...
<<<<<< QMUX:
<<<<<<   length  = 15
<<<<<<   flags   = 0x00
<<<<<<   service = "ctl"
<<<<<<   client  = 0
<<<<<< QMI:
<<<<<<   flags       = "none"
<<<<<<   transaction = 1
<<<<<<   tlv_length  = 4
<<<<<<   message     = "Allocate CID" (0x0022)
<<<<<< TLV:
<<<<<<   type       = "Service" (0x01)
<<<<<<   length     = 1
<<<<<<   value      = 02
<<<<<<   translated = dms

error: couldn't create client for the 'dms' service: CID allocation failed in the CTL client: Transaction timed out

I am using the latest qmicli I could get via Debian Sid.

root at x046:~# qmicli —version
qmicli 1.12.6
Copyright (C) 2015 Aleksander Morgado
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl-2.0.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

root at x046:~#

The EM7455 was updated to the latest firmware, that seems to be now the release version.

ati
Manufacturer: Sierra Wireless, Incorporated
Model: EM7455
Revision: SWI9X30C_02.08.02.00 r5428 CARMD-EV-FRMWR2 2016/01/06 20:38:53
MEID: 35432407003xxx
IMEI: 35432407003xxxx
IMEI SV:  4
FSN: LF533510920410
+GCAP: +CGSM,+DS,+ES


OK

I have configured the USB composition as following, as the default it comes with CDC_MBIM active.

at!usbcomp?
Config Index: 1
Config Type:  1 (Generic)
Interface bitmask: 0000010D (diag,nmea,modem,rmnet0)

OK

I have latest kernel from mainline;

root at x046:~# uname -a
Linux x046 4.5.0-rc7-NONAME-00337-g7f02bf6 #1 SMP Wed Mar 9 14:41:03 CET 2016 armv7l GNU/Linux
root at x046:~#

The USB events from dmesg;

root at x046:~# dmesg |grep usb
[    0.686885] usbcore: registered new interface driver usbfs
[    0.686953] usbcore: registered new interface driver hub
[    0.687059] usbcore: registered new device driver usb
[    1.078652] usbcore: registered new interface driver usb-storage
[    1.406957] usb 2-1: new high-speed USB device number 2 using ci_hdrc
[    1.427686] usbcore: registered new interface driver usbhid
[    1.427690] usbhid: USB HID core driver
[    1.427778] usbcore: registered new interface driver r8712u
[   12.012460] usb 2-1.2: new high-speed USB device number 3 using ci_hdrc
[   12.091715] usb 2-1.2: config 1 has an invalid interface number: 8 but max is 3
[   12.091739] usb 2-1.2: config 1 has no interface number 1
[   12.235717] usbcore: registered new interface driver usbserial
[   12.235787] usbcore: registered new interface driver usbserial_generic
[   12.235858] usbserial: USB Serial support registered for generic
[   12.242258] usbcore: registered new interface driver qcserial
[   12.242342] usbserial: USB Serial support registered for Qualcomm USB modem
[   12.253858] usb 2-1.2: Qualcomm USB modem converter now attached to ttyUSB0
[   12.274148] usb 2-1.2: Qualcomm USB modem converter now attached to ttyUSB1
[   12.276974] usb 2-1.2: Qualcomm USB modem converter now attached to ttyUSB2
[   12.281253] usbcore: registered new interface driver cdc_wdm
[   12.303536] qmi_wwan 2-1.2:1.8 wwan0: register 'qmi_wwan' at usb-ci_hdrc.1-1.2, WWAN/QMI device, 32:5a:27:f4:ce:59
[   12.307546] usbcore: registered new interface driver qmi_wwan
root at x046:~#

As sidenote I tried the CDC_MBIM as well, but I seem to get transaction time out on that as well.

Regards,
Sebastian