tty/USB0 is not being generated

[Wobaffet]

Hello, we are trying to port cellular module from quectel with USB interface,

on the /dev/ directory some devices should be created like /dev/cdc-wdmX but we don't see anything on the USB side, here are some of the logs attached:

root@imx8mp-lpddr4-evk:~# lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@imx8mp-lpddr4-evk:~# dmesg | grep usb
[    0.086528] usbcore: registered new interface driver usbfs
[    0.086572] usbcore: registered new interface driver hub
[    0.086600] usbcore: registered new device driver usb
[    1.381017] usbcore: registered new interface driver r8152
[    1.386568] usbcore: registered new interface driver qmi_wwan
[    1.437731] usbcore: registered new interface driver cdc_acm
[    1.451441] usbcore: registered new interface driver cdc_wdm
[    1.457251] usbcore: registered new interface driver uas
[    1.462612] usbcore: registered new interface driver usb-storage
[    1.468682] usbcore: registered new interface driver usbserial_generic
[    1.475243] usbserial: USB Serial support registered for generic
[    1.481280] usbcore: registered new interface driver usb_debug
[    1.487136] usbserial: USB Serial support registered for debug
[    1.492994] usbserial: USB Serial support registered for xhci_dbc
[    1.499115] usbcore: registered new interface driver ftdi_sio
[    1.504884] usbserial: USB Serial support registered for FTDI USB Serial Device
[    1.512220] usbcore: registered new interface driver option
[    1.517814] usbserial: USB Serial support registered for GSM modem (1-port)
[    1.524805] usbcore: registered new interface driver qcserial
[    1.530572] usbserial: USB Serial support registered for Qualcomm USB modem
[    1.537563] usbcore: registered new interface driver usb_serial_simple
[    1.544113] usbserial: USB Serial support registered for carelink
[    1.550228] usbserial: USB Serial support registered for zio
[    1.555906] usbserial: USB Serial support registered for funsoft
[    1.561940] usbserial: USB Serial support registered for flashloader
[    1.568313] usbserial: USB Serial support registered for google
[    1.574254] usbserial: USB Serial support registered for libtransistor
[    1.580802] usbserial: USB Serial support registered for vivopay
[    1.586829] usbserial: USB Serial support registered for moto_modem
[    1.593119] usbserial: USB Serial support registered for motorola_tetra
[    1.599759] usbserial: USB Serial support registered for nokia
[    1.605610] usbserial: USB Serial support registered for novatel_gps
[    1.611985] usbserial: USB Serial support registered for hp4x
[    1.617754] usbserial: USB Serial support registered for suunto
[    1.623695] usbserial: USB Serial support registered for siemens_mpi
[    1.630081] usbcore: registered new interface driver usb_ehset_test
[    1.636385] i2c-core: driver [usb3503] registered
[    1.768100] usbcore: registered new interface driver usbhid
[    1.773685] usbhid: USB HID core driver
[    2.584206] imx8mq-usb-phy 381f0040.usb-phy: supply vbus not found, using dummy regulator
[    2.592733] imx8mq-usb-phy 382f0040.usb-phy: supply vbus not found, using dummy regulator
[    2.698075] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[    2.774164] usb usb4: We don't know the algorithms for LPM for this host, disabling LPM.

 And here is our defconfig:

CONFIG_USB_SERIAL_WWAN=y
CONFIG_USB_SERIAL_OPTION=y
CONFIG_USB_SERIAL_QUALCOMM=y
CONFIG_WWAN=y
CONFIG_USB_NET_QMI_WWAN=y
CONFIG_PPP=y
CONFIG_PPP_ASYNC=y
CONFIG_PPP_SYNC_TTY=y
CONFIG_PPP_DEFLATE=y
CONFIG_USB_ACM=y
CONFIG_USB_SERIAL_DEBUG=y

What could be the issue?

Thanks!

[Wobaffet]

reminder

[Rita_Wang]

Which version BSP are you using? How about your usb design in your board?

[Wobaffet]

We re using kernel version 5.15 we are on kirkstone branch, developing with yocto.

root@imx8mp-lpddr4-evk:~# cat /sys/kernel/debug/usb/devices 

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 1
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 5.15
S:  Manufacturer=Linux 5.15.71+ xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=xhci-hcd.1.auto
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=5000 MxCh= 1
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 3.00 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1
P:  Vendor=1d6b ProdID=0003 Rev= 5.15
S:  Manufacturer=Linux 5.15.71+ xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=xhci-hcd.1.auto
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 1
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 5.15
S:  Manufacturer=Linux 5.15.71+ xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=xhci-hcd.2.auto
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=5000 MxCh= 1
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 3.00 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1
P:  Vendor=1d6b ProdID=0003 Rev= 5.15
S:  Manufacturer=Linux 5.15.71+ xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=xhci-hcd.2.auto
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

We are using USB with minimal configuration like attached below.

[Rita_Wang]

For the USB2_VBUS you DNP the R184, Recommend you add it.

[Wobaffet]

Yes, we've add R184. But still our module is not being recognized. 

Before configuring device tree, lsusb command were outputting:

root@imx8mp-lpddr4-evk:~# lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

After devicetree update for USB 2: we get like I've posted earlier. I think USB is up and working but option driver is not working even though I've added vid and pid information that quectel provided.

root@imx8mp-lpddr4-evk:~# lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

 Here are the patches that quectel provided.

What could be the issue or missing configuration?

Thanks!

[Wobaffet]

reminder