Disable USB port

7/3/2015

Possible solution to disable USB port if your device has one and you need security...Find the device file for your port, mine is shown below, and run the following 2 commands

#cd /sys/devices/platform/fsl-ehci.0/usb1/
#echo 0 > authorized

To ENABLE the USB port...
#cd /sys/devices/platform/fsl-ehci.0/usb1/

#echo 1 > authorized

appears to successfully toggle it back ON/Enabled...also, disabling USB access by the method above appears to NOT persist through a reboot so this likely would need to be part of a script run by your app or part of your app if you need to maintain a disabled port for the sake of security

USB Disable/Enable method described here also appears to work on USB mass storage (thumb drive) - i.e. when disabled, the "udisk" folder shows up empty in ESFileExplorer

This has only been proven in concept by trying from a shell session.

2 Comments

John

8/6/2015 03:38:47 am

Thanks! This was a helpful tip for my project

Cooper B link

12/12/2020 01:07:29 am

Thankks for posting this

Unless stated otherwise, everything discussed herein is related to development I've done on semi custom hardware, (Freescale-based, derived from a FS reference platform) with a rooted BSP/OS (also based on a Freescale reference build). I have not built the BSP (nor have I ever built a BSP)

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John Goluch has been a software developer since 1989. He has developed code for a variety of embedded systems in Assembly and C, for the web in HTML/JS/PHP, and mobile devices in Qt/C++ and Android/Java. Content here comes from "in the weeds" level of research and discovery related to Android development

Disable USB port

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Unless stated otherwise, everything discussed herein is related to development I've done on semi custom hardware, (Freescale-based, derived from a FS reference platform) with a rooted BSP/OS (also based on a Freescale reference build). I have not built the BSP (nor have I ever built a BSP)

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