[FS#3408] DWC2 USB errors with Huawei E3372 4G dongle running in NCM mode

[OpenWrt Bugs]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Andy Burns (andyburns) 

Attached to Project - OpenWrt/LEDE Project
Summary - DWC2 USB errors with Huawei E3372 4G dongle running in NCM mode
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - I have a BT Humehub 5A with a Huawei E3372 dongle, used purely for a backup for my VDSL connection, so only tested every few months, I noticed with 19.07.03 it wasn't working, so I upgraded to 19.07.04 and it's still not working.

It seems to initially "see" the dongle, then fail to talk to it

root at hh5a:~# dmesg|grep -i usb
[    0.374109] usbcore: registered new interface driver usbfs
[    0.379680] usbcore: registered new interface driver hub
[    0.385095] usbcore: registered new device driver usb
[    1.651958] USB_VBUS: disabling
[    3.779353] dwc2 1e101000.usb: 1e101000.usb supply vusb_d not found, using dummy regulator
[    3.786491] dwc2 1e101000.usb: 1e101000.usb supply vusb_a not found, using dummy regulator
[    3.794916] dwc2 1e101000.usb: dwc2_core_reset() HANG! AHB Idle GRSTCTL=0
[    4.001788] dwc2 1e101000.usb: DWC OTG Controller
[    4.005122] dwc2 1e101000.usb: new USB bus registered, assigned bus number 1
[    4.012215] dwc2 1e101000.usb: irq 62, io mem 0x1e101000
[    4.018987] hub 1-0:1.0: USB hub found
[   11.543311] usbcore: registered new interface driver cdc_wdm
[   11.902165] usbcore: registered new interface driver usbserial
[   11.906895] usbcore: registered new interface driver usbserial_generic
[   11.913296] usbserial: USB Serial support registered for generic
[   11.994648] usbcore: registered new interface driver cdc_ncm
[   12.039432] usbcore: registered new interface driver huawei_cdc_ncm
[   15.249532] usb 1-1: new high-speed USB device number 2 using dwc2
[   16.453533] usb usb1-port1: Cannot enable. Maybe the USB cable is bad?
[   16.645469] usb 1-1: new high-speed USB device number 3 using dwc2
[   16.650389] dwc2 1e101000.usb: NYET/NAK/ACK/other in non-error case, 0x00000002
[   16.657632] dwc2 1e101000.usb: NYET/NAK/ACK/other in non-error case, 0x00000002
[   16.664934] dwc2 1e101000.usb: NYET/NAK/ACK/other in non-error case, 0x00000002
[   16.672397] dwc2 1e101000.usb: NYET/NAK/ACK/other in non-error case, 0x00000002
[   16.679561] dwc2 1e101000.usb: NYET/NAK/ACK/other in non-error case, 0x00000002
[   16.686865] dwc2 1e101000.usb: NYET/NAK/ACK/other in non-error case, 0x00000002
[   16.694339] dwc2 1e101000.usb: NYET/NAK/ACK/other in non-error case, 0x00000002
[   16.701495] dwc2 1e101000.usb: NYET/NAK/ACK/other in non-error case, 0x00000002
[   16.708802] dwc2 1e101000.usb: NYET/NAK/ACK/other in non-error case, 0x00000002
[   17.366922] usbcore: registered new interface driver option
[   17.371364] usbserial: USB Serial support registered for GSM modem (1-port)
[   17.925693] usb usb1-port1: Cannot enable. Maybe the USB cable is bad?
[   17.931060] usb usb1-port1: attempt power cycle

Normally it would use /dev/ttyUSB0 but as a result of the above erros, no USB tty devices exist

root at hh5a:~# ls /dev/tty*
/dev/tty      /dev/ttyLTQ0



More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3408

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