Hello,
We’re trying to use EM7355 in Jetson Nano. The kernel is 4.9.140. I’ve not been able to get the device working by enabling the following configs
CONFIG_USB_SIERRA_NET=y
CONFIG_USB_SERIAL_SIERRAWIRELESS=y
CONFIG_USB_SERIAL_QUALCOMM=y
CONFIG_USB_NET_QMI_WWAN=y
CONFIG_USB_SERIAL_WWAN=y
CONFIG_MII=y
I find the device ID is supported in CONFIG_USB_SERIAL_QUALCOMM, qcserial.c; but it fails to load the driver at “if (intf->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)”;
the interface class it gets [USB_CLASS_COMM] and [USB_CLASS_CDC_DATA]. Then I add the device ID to another driver file CONFIG_USB_SERIAL_SIERRAWIRELESS, sierra.c and I can see that it installed two serial ports ttyUSB0 and ttyUSB1. I see in the dmesg log “sierra ttyUSB0: sierra_submit_rx_urbs: submit urb failed”. I also tried to talk to the modem at 9600bps using minicom and got no answer by typing ‘at’, it may be in data mode. I think this is not the correct driver.
Some information
lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=tegra-xusb/4p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=tegra-xusb/5p, 480M
|__ Port 1: Dev 2, If 12, Class=Communications, Driver=sierra, 480M
|__ Port 1: Dev 2, If 13, Class=CDC Data, Driver=sierra, 480M
cat /sys/kernel/debug/usb/devices
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 2
P: Vendor=03f0 ProdID=4e1d Rev= 0.06
S: Manufacturer=Sierra Wireless, Incorporated
S: Product=HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module
C: #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr=500mA
I: If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=
E: Ad=82(I) Atr=03(Int.) MxPS= 12 Ivl=32ms
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I: If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=
E: Ad=84(I) Atr=03(Int.) MxPS= 12 Ivl=32ms
E: Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I: If#= 8 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=
E: Ad=86(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=
E: Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
C:* #Ifs= 2 Cfg#= 2 Atr=e0 MxPwr=500mA
A: FirstIf#=12 IfCount= 2 Cls=02(comm.) Sub=0e Prot=00
I:* If#=12 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=0e Prot=00 Driver=sierra
E: Ad=82(I) Atr=03(Int.) MxPS= 64 Ivl=32ms
I: If#=13 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=02 Driver=sierra
I:* If#=13 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=sierra
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I need some direction to move forward.
Any help is appreciated.
Thanks,
Hakim