Control USB 3.0 VBus by software.

[Thinh Nguyen 0]

I have a Tinker board 2S and I would like to control USB 3.0 VBUS to turn on/off devices that connected to USB port. Does this board support controlling USB Power?

I also look at schemtic, please look at the picture below (Attached)

Can USB3_EN be control by software?

 

[nishi 0]

Hello,

I've come across this thread and realized that the original question hasn't been answered yet.
I am also interested in this topic, and I'm wondering if anyone could provide some insights or experiences related to this.

Thank you in advance for any help you can provide.

[tooz 28]

hello @nishi and @Thinh Nguyen, 

you can control the vbus power through echo commands

1. check the kernel version with command: 

uname -a

keep in mind that if you're using a usb keyboard, the power will be off immediately after you execute the echo off command. if you wish to turn it back on without reboot, please: 1. use a type c keyboard, or 2. connect tinker board to a pc with a ttys dongle so the commands can be executed from the putty console

here are the commands to control the vbus power:

linux4.4 debian10:

TypeA port:

echo on > /sys/kernel/debug/fe900000.dwc3/vbus
echo off > /sys/kernel/debug/fe900000.dwc3/vbus

TypeC port:

echo on > /sys/kernel/debug/fe800000.dwc3/vbus
echo off > /sys/kernel/debug/fe800000.dwc3/vbus

 

linux4.19 debian10:

TypeA port:

echo on > /sys/kernel/debug/fe900000.dwc3/vbus
echo off > /sys/kernel/debug/fe900000.dwc3/vbus

TypeC port (for cc chip fusb302):

echo on > /sys/kernel/debug/fe800000.dwc3/vbus
echo off > /sys/kernel/debug/fe800000.dwc3/vbus

TypeC port (for cc chip rt1715):

echo sink >/sys/class/typec/port0/port_type
echo dual >/sys/class/typec/port0/port_type

 

linux5.10 debian11:

typeA port:

echo on > /sys/kernel/debug/usb/fe900000.usb/hub_vbus
echo off > /sys/kernel/debug/usb/fe900000.usb/hub_vbus

TypeC port (both fusb302 & rt1715 use the same commands):

echo sink >/sys/class/typec/port0/port_type
echo dual >/sys/class/typec/port0/port_type

 

android12:

typeA port:

echo on > /sys/kernel/debug/fe900000.dwc3/hub_vbus
echo off > /sys/kernel/debug/fe900000.dwc3/hub_vbus

typeC port (for cc chip fusb302):

echo on > /sys/kernel/debug/fe800000.dwc3/hub_vbus
echo off > /sys/kernel/debug/fe800000.dwc3/hub_vbus

TypeC port (for cc chip rt1715):

echo sink >/sys/class/typec/port0/port_type
echo dual >/sys/class/typec/port0/port_type

 

[nishi 0]

Thank you for your response! I was able to confirm the behavior as expected.