EC200A-EU USB disconnect

Technical Subjects Software General Function
1

Hi everyone,

I am trying to integrate EC200A-EU, on a custom arm am355x based Linux board. I have complied and installed the necessary option and usb_wwan drivers on the board. However, I keep receiving the following error messages in the dmesg logs:

[ 961.685448] usb 1-1.1: new high-speed USB device number 87 using musb-hdrc
[ 961.817167] usb 1-1.1: New USB device found, idVendor=2c7c, idProduct=6005, bcdDevice= 3.18
[ 961.835645] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 961.860504] usb 1-1.1: Product: Android
[ 961.864560] usb 1-1.1: Manufacturer: Android
[ 961.885654] usb 1-1.1: SerialNumber: 0000
[ 961.895131] usb 1-1.1: can’t set config #1, error -71
[ 961.907110] usb 1-1.1: USB disconnect, device number 87

lsusb does not indicate any newly added device. I guess the error message “can’t set config #1, error -71” indicates that the board is not able to supply sufficient power to the modem and hence the modem is not suitable for our board.

Your kind insight in this matter will be highly appreciated.

Thanks & Regards,
ktoefl

2

For such errors if you check it on stack overflow, there might many other guys also ask about it.
Literally, it means that the USB host cannot choose and enable the USB configuration.
And yes some time the lack of the power might cause it, and if the USB cable is too long and the USB is interfered by any others, you might also see it.