USB Cellular Modem with imx8mp

Wobaffet — Mon, 29 Jul 2024 13:20:40 GMT

Hello,

We are trying to bring up Quectel eg915 cellular module connected to imx8mp via USB interface. We can't see any device generated on lsusb command or in /dev/ttyUSBx . We can communicate with the module via UART, which is up and running. But no device is detected. Here is our device tree for the USB and kernel config is attached. Could you guide us where could be the issue is?

&usb3_phy1 { fsl,phy-tx-preemp-amp-tune = <3>; fsl,phy-tx-vref-tune = <0xb>; status = "okay"; vbus-supply=<&reg_usb_vbus>; }; &usb3_1 { dr_mode = "host"; status = "okay"; }; &usb_dwc3_1 { dr_mode = "host"; status = "okay"; }; reg_usb_vbus: regulator-vbus { compatible = "regulator-fixed"; regulator-name = "USB-VBUS"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; enable-active-high; regulator-always-on; };

root@imx8mp-lpddr4-evk:~# echo -e "AT+QCFG=\"usbnet\"?\r" | picocom -b 115200 -qrx 1000 /dev/ttymxc2 > foo.txt root@imx8mp-lpddr4-evk:~# cat foo.txt AT+QCFG="usbnet"? +QCFG: "usbnet",1 OK root@imx8mp-lpddr4-evk:~# echo -e "AT+QGMR\r" | picocom -b 115200 -qrx 1000 /dev/ttymxc2 > foo.txt root@imx8mp-lpddr4-evk:~# cat foo.txt AT+QGMR EG915NEUAGR03A05M16_01.001.01.001 OK root@imx8mp-lpddr4-evk:~# echo -e "AT+CFUN?\r" | picocom -b 115200 -qrx 1000 /dev/ttymxc2 > foo.txt root@imx8mp-lpddr4-evk:~# cat foo.txt AT+CFUN? +CFUN: 1 OK 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:~# ls /sys/bus/usb/drivers cdc_acm cdc_mbim cdc_wdm hub option r8152 rndis_host usb usb_debug usb_serial_simple usbhid cdc_ether cdc_ncm ftdi_sio io_edgeport qcserial r8153_ecm uas usb-storage usb_ehset_test usbfs usbserial_generic

Thanks!

Best Regards.

Re: USB Cellular Modem with imx8mp

Bio_TICFSL — Tue, 30 Jul 2024 14:19:25 GMT

Hello,

That depend of your modem model, since USB has marked as none or X in the kernel configuration file.

Regards

Re: USB Cellular Modem with imx8mp

Wobaffet — Tue, 30 Jul 2024 14:32:11 GMT

Hello, Thank you for the answer. What do you mean by USB has marked as none, or X. We are using eg915N from quectel, here is the driver info that module uses.

Re: USB Cellular Modem with imx8mp

Wobaffet — Fri, 02 Aug 2024 06:54:53 GMT

reminder.

topic Re: USB Cellular Modem with imx8mp in i.MX Processors

USB Cellular Modem with imx8mp

Re: USB Cellular Modem with imx8mp

Re: USB Cellular Modem with imx8mp

Re: USB Cellular Modem with imx8mp